UHS MDCAT 2025 Past Paper (Paper D)

The first consequence of lymphatic blockage in tissues is:

1. A.Deficiency of oxygen
2. B.Loss of nerve signals
3. C.Drop in blood pressure
4. D.Excess fluid accumulation in tissue

Answer and explanation locked

Which of the following is the correct pathway of nerve Impulse?

1. A.Receptors--> CNS--> Effectors
2. B.Effectors--> Receptors--> CNS
3. C.CNS--> Effectors--> Receptors
4. D.Effectors--> CNS --> Receptors

Answer and explanation locked

The neurotransmitters are secreted by the neuron from:

1. A.Axon ends
2. B.Dendrite end
3. C.Nissl's granules
4. D.Cell body

Answer and explanation locked

Hippocampus plays an important role in the:

1. A.Formation of short-term memory
2. B.Formation of image on retina
3. C.Formation of long-term memory
4. D.Formation of emotions

Answer and explanation locked

Enzymes activity decreases at very low or high pH because:

1. A.Substrate concentration increases
2. B.Enzymes become denatured
3. C.Product formation increases
4. D.Temperature becomes constant

Answer and explanation locked

The complementary base pairing in DNA is important because it:

1. A.Maintains the tertiary structure of enzymes
2. B.Provides energy for all cell metabolism
3. C.Enables protein to fold properly
4. D.Allows DNA act as a genetic blueprint during replication

Answer and explanation locked

A mature duplicated chromosome consists of:

1. A.Two identical double helical DNA molecules
2. B.Two different double helical DNA molecules
3. C.A double helical DNA molecule distributed in both chromatids
4. D.Histone chains wrapped around DNA core

Answer and explanation locked

The most primitive respiratory process occurring in a living cell is;

1. A.Lactic acid fermentation
2. B.Alcoholic fermentation
3. C.Glycolysis
4. D.Krebs's cycle

Answer and explanation locked

Receive, retain and nourish a fertilized ovum is the main function of:

1. A.Cervix
2. B.Uterus
3. C.Ovary
4. D.Oviduct

Answer and explanation locked

The primary function of larynx is:

1. A.Humidifying air
2. B.Filtering dust
3. C.Gaseous exchange
4. D.Voice production

Answer and explanation locked

During menstrual cycle, luteinizing hormone (LH) is secreted due to;

1. A.Decrease in Estrogen
2. B.Decrease in FSH
3. C.Increase in FSH
4. D.Environmental effect

Answer and explanation locked

Left and right cerebral hemispheres are connected with each other by:

1. A.Corpus luteum
2. B.Corpus callosum
3. C.A band of dendrites
4. D.Dorsal and ventral nerve roots

Answer and explanation locked

Which is the common feature between cardiac and smooth muscles?

1. A.Voluntary
2. B.Involuntary
3. C.Branched
4. D.Unbranched

Answer and explanation locked

The joints which cause rotational movements are

1. A.Hinge
2. B.Ball and Socket
3. C.Cartilage
4. D.Sutures

Answer and explanation locked

Self-fertilization in plants through successive generations can lead to the development of:

1. A.Hybrid breeds of plants
2. B.Variations in coming generation
3. C.True breeding plants
4. D.Adaptation with their environment

Answer and explanation locked

Which part of the neuron typically receives incoming signals from other neurons?

1. A.Axon
2. B.Dendrites
3. C.Myelin sheath
4. D.Synaptic knob

Answer and explanation locked

Why thick filaments are unable to bind with thin filament in a relaxed muscle fiber?

1. A.Actin blocks the myosin binding site
2. B.Tropomyosin blocks the myosin binding site
3. C.Troponin blocks the myosin binding site
4. D.Tropomyosin blocks the troponin binding site

Answer and explanation locked

Which of the following best highlights the importance of proteins in Immunity?

1. A.They act as receptors of pathogens
2. B.They are long term energy reserves
3. C.They act as antibodies
4. D.They act as mechanical barrier to pathogens

Answer and explanation locked

The secondary structure of proteins is stabilized by:

1. A.Ionic bonds
2. B.Hydrogen bonds
3. C.Disulfide bridges
4. D.Hydrophobic exclusion

Answer and explanation locked

The following is an example of a globular protein.

1. A.Keratin
2. B.Collagen
3. C.Hemoglobin
4. D.Histone

Answer and explanation locked

The process of osmoregulation refers to:

1. A.The filtration of blood to remove metabolic waste
2. B.The regulation of solute and water movement between an organism and its environment
3. C.The creation of an osmotic gradient in the kidney medulla
4. D.The secretion of hormones that control blood plasma

Answer and explanation locked

A baby girl is born with hemophilia, which is an X-linked recessive disorder. What are the most likely genotypes of her parents?

1. A.The mother is a carrier and the father is normal.
2. B.The mother is hemophiliac and the father is normal.
3. C.The mother is carrier and the father is hemophiliac
4. D.Both are normal.

Answer and explanation locked

Identify the most appropriate function of chromosomes

1. A.Energy production and storage
2. B.Protein synthesis and regulation
3. C.Storage of genetic information
4. D.Lipid metabolism and transport

Answer and explanation locked

Enzymes belong to which class of biomolecules?

1. A.Carbohydrates
2. B.Lipids
3. C.Proteins
4. D.Nucleic acids

Answer and explanation locked

________ arranges the DNA Into the chromosomes in a eukaryotic cell.

1. A.Hormones
2. B.Elastin
3. C.Histone
4. D.Nucleosome

Answer and explanation locked

The function of nucleolus is to make:

1. A.rDNA
2. B.Lysosomes
3. C.Ribosomes
4. D.Chromosomes

Answer and explanation locked

Which of the following blood vessels have lowest blood velocity with correct reason for low blood velocity?

1. A.Arteries: Due to thick walls
2. B.Capillaries: due to highest overall cross-sectional area
3. C.Veins: due to blood flow against the gravity
4. D.Capillaries: Due to two-way blood flow in capillaries

Answer and explanation locked

An active athlete has more stamina of running compared to an officer of same age with physically inactive lifestyle. Which of the following organelles has greatly increased in the muscle cells of athlete?

1. A.Nucleus
2. B.Mitochondria
3. C.Golgi bodies
4. D.Smooth endoplasmic reticulum (SER)

Answer and explanation locked

Once an action potential reaches the membrane of a skeletal muscle fiber, what is the first event that occurs in the contraction process?

1. A.Actin and myosin form a cross-bridge
2. B.Calcium is pumped back into the sarcoplasmic reticulum
3. C.Calcium is released from the sarcoplasmic reticulum
4. D.ATP is hydrolyzed by troponin

Answer and explanation locked

The pubic symphysis is a slightly moveable joint joined by which of the following tissue?

1. A.Elastic cartilage
2. B.Fibrocartilage
3. C.Costal cartilage
4. D.Articular cartilage

Answer and explanation locked

Mendel crossed a plant with round yellow seeds (RRYY) and a plant with wrinkled green seeds (rryy), what was the phenotype of all F1 offspring?

1. A.All round green
2. B.All round yellow
3. C.All wrinkled yellow
4. D.All wrinkled green

Answer and explanation locked

In a normal 28 days menstrual cycle when would you expect the LH surge to occur?

1. A.Days 7-10
2. B.Days 11-14
3. C.Days 15-18
4. D.Days 19-22

Answer and explanation locked

Which property of water helps in moderating Earth's climate and maintaining stable temperature in aquatic environment?

1. A.Low viscosity
2. B.High specific heat capacity
3. C.High surface tension
4. D.High polarity

Answer and explanation locked

Effect of increased substrate concentration on enzyme activity:

1. A.Decrease the rate of reaction
2. B.Increase the reaction rate until all active sites are saturated
3. C.Have no effect on the reaction rate
4. D.Increase the rate of reaction in a straight diagonal line

Answer and explanation locked

An oligosaccharide is made up of at least:

1. A.two saccharide units
2. B.ten saccharide units
3. C.three to ten saccharide units
4. D.more than ten saccharide units

Answer and explanation locked

Which statement best explains the difference between humoral and cell mediated Immune response?

1. A.Humoral immunity involves B-Lymphocytes and cell mediated immunity involves T-Lymphocytes
2. B.Humoral immunity destroys viruses and cell mediated immunity destroys bacteria
3. C.Humoral immunity is specific and cell mediated immunity is nonspecific
4. D.Humoral immunity uses antibodies and cell mediated immunity does not involve immune cells

Answer and explanation locked

Which of the following is the correct higher (left) to lower (right) sequence of molecules with respect to the amount in the cell?

1. A.DNA → rRNA → tRNA → mRNA
2. B.rRNA → tRNA → mRNA → DNA
3. C.mRNA → tRNA → rRNA → DNA
4. D.DNA → mRNA → tRNA → rRNA

Answer and explanation locked

A person in hot weather is unable to maintain body temperature. Which physiological process has failed?

1. A.Vasodilation & sweating
2. B.Vasoconstriction
3. C.Shivering
4. D.Renin secretion

Answer and explanation locked

The main idea in Darwin's Theory of "Origin of species by natural selection" is:

1. A.Inheritance of acquired traits
2. B.Use and disuse of organs
3. C.Species never change
4. D.Evolution occurs through gradual accumulation of adaptation through successive generations

Answer and explanation locked

Which of the following is a key feature of RNA?

1. A.Deoxyribose and thymine
2. B.Double stranded and thymine
3. C.Ribose and uracil
4. D.Ribose and thymine

Answer and explanation locked

Which of the following types of RNA makeup the largest proportion of total cellular RNA?

1. A.Messenger RNA
2. B.Ribosomal RNA
3. C.Transfer RNA
4. D.Catalytic RNA (ribozyme)

Answer and explanation locked

The bacterium Treponema Pallidum is responsible for which sexually transmitted disease?

1. A.Syphilis
2. B.Chlamydia
3. C.Gonorrhea
4. D.Genital herpes

Answer and explanation locked

Tissue fluid in a lymphatic system is called as:

1. A.Plasma
2. B.Matrix
3. C.Lymph
4. D.Blood

Answer and explanation locked

Which one of the following biomolecules is a polymer/polysaccharide?

1. A.Sucrose
2. B.Pentose
3. C.Lactose
4. D.Glycogen

Answer and explanation locked

Olfactory receptors are the type of:

1. A.photoreceptors
2. B.mechanoreceptors
3. C.thermoreceptors
4. D.chemoreceptors

Answer and explanation locked

Which of the following organisms eliminate nitrogenous waste mainly in the form of uric acid?

1. A.Freshwater Fish
2. B.Amphibians
3. C.Birds
4. D.Mammals

Answer and explanation locked

Which of the following cells possess Nissl's granules?

1. A.Nerve cells
2. B.WBC
3. C.RBC
4. D.Platelets

Answer and explanation locked

Which part of human brain is involved in maintaining the posture and balance of the body?

1. A.Cerebrum
2. B.Cerebellum
3. C.Hypothalamus
4. D.Medulla oblongata

Answer and explanation locked

Arthritis is:

1. A.Inflammation of joints
2. B.Herniation of intervertebral disc
3. C.Fusion of vertebral joint
4. D.tingling along the length of legs

Answer and explanation locked

Which type of joint is present in pubis?

1. A.Fibrous joints
2. B.Immoveable joints
3. C.Cartilaginous joints
4. D.Freely moveable joints

Answer and explanation locked

Which type of neurons stimulate muscles to contract In a reflex arc?

1. A.Motor neurons
2. B.Sensory neurons
3. C.Interneurons
4. D.Afferent neurons

Answer and explanation locked

Which of the following statements best compares cell division in prokaryotic and Eukaryotic cells?

1. A.Eukaryotes divide by budding ; prokaryotes by mitosis
2. B.Eukaryotes use binary fission ; prokaryotes by meiosis
3. C.Eukaryotes divide by mitosis ; prokaryotes by binary fission
4. D.Both use mitosis by cell division

Answer and explanation locked

Which of the following best describes "acquired characteristics" according to Lamarckism?

1. A.Traits caused by mutation
2. B.Traits inherited from parents
3. C.Traits developed by use or disuse
4. D.Traits selected by nature

Answer and explanation locked

According to Lock and Key model, the active site is regarded as:

1. A.Rigid and specific
2. B.Flexible and specific
3. C.Rigid and non specific
4. D.Flexible and non specific

Answer and explanation locked

Peptide bonds are Important In protein because they:

1. A.Affect solubility
2. B.Hold R-groups
3. C.Link amino acid
4. D.help in releasing oxygen

Answer and explanation locked

Why are retroviruses placed in a separate class of RNA viruses?

1. A.They always infect animal cells only
2. B.Their RNA acts directly as mRNA
3. C.They lack protein coats
4. D.They use reverse transcriptase to make DNA from RNA

Answer and explanation locked

Reversible inhibitors differ from Irreversible Inhibitors because they:

1. A.Binds permanently and cannot be removed
2. B.Bind temporarily and can be removed
3. C.Permanently inactivate the enzyme
4. D.Change enzyme structure permanently

Answer and explanation locked

Which is an enzyme activator secreted by the Intestinal glands:

1. A.Amylase
2. B.Pepsinogens
3. C.Enterokinase
4. D.Lipase

Answer and explanation locked

In which of the following combination, both components have Hyaline cartilage?

1. A.Epiglottis & intervertebral disc
2. B.Trachea & intervertebral disc
3. C.Nose & pinna
4. D.Nose & trachea

Answer and explanation locked

According to Lamarck, the evolution of long necks in giraffes is explained by:

1. A.Natural selection
2. B.Genetic mutation
3. C.Survival of the fittest
4. D.Stretching of necks over generations

Answer and explanation locked

The process of spermatogenesis occurs in which part of the male reproductive system?

1. A.Seminiferous tubules
2. B.Vas deferens
3. C.Scrotum
4. D.Epididymis

Answer and explanation locked

Which layer of uterus nourishes the embryo after implantation?

1. A.Cervical epithelium
2. B.Myometrium
3. C.Endometrium
4. D.Perimetrium

Answer and explanation locked

The main role of mRNA during protein synthesis is to:

1. A.Carry genetic information for protein synthesis
2. B.stabilize ribosome
3. C.deliver amino acids
4. D.provide platform for proteins synthesis

Answer and explanation locked

Glycoproteins are formed as a result of the combination of:

1. A.Lipids and proteins
2. B.Carbohydrates and proteins
3. C.Nucleic acid and proteins
4. D.Fatty acids and carbohydrates

Answer and explanation locked

A student observed a boundary In both plant and animal cells that controls entry and exit of substances. Which of the following structures is likely being observed?

1. A.Mitochondria
2. B.Golgi apparatus
3. C.Plasma membrane
4. D.Cell wall

Answer and explanation locked

If a normal person marries with colour blind female what will be the possibility of normal male child:

1. A.0%
2. B.25%
3. C.50%
4. D.75%

Answer and explanation locked

Which of the following characters is shared by both skeletal and cardiac muscles?

1. A.Presence of Striation
2. B.Involuntary control
3. C.Multinucleated fibers
4. D.Intercalated discs

Answer and explanation locked

Which of the following muscle types are involuntary in action?

1. A.Skeletal and smooth
2. B.Skeletal and cardiac
3. C.Cardiac and smooth
4. D.Smooth muscle only

Answer and explanation locked

In which of the following combinations, both components have non-striated muscle fibers?

1. A.Intestine & biceps
2. B.Intestine & blood vessels
3. C.Heart & lungs
4. D.Stomach & heart

Answer and explanation locked

Value of R gas constant in J mol-1 K-1 is

1. A.8.314
2. B.62.4
3. C.0.821
4. D.62400

Answer and explanation locked

Which of the following best explains why phenol reacts with aqueous NaOH, but alcohols do not?

1. A.Phenol has a lower boiling point than alcohol.
2. B.Alcohols contain a strong O-H bond that cannot be broken by weak bases.
3. C.Phenol form hydrogen bonding that facilitates ionization.
4. D.Phenol is weakly acidic due to resonance stabilization of phenoxide ion.

Answer and explanation locked

In propene pi-bond is formed by sideway overlap of:

1. A.s-orbitals
2. B.p-orbitals
3. C.sp2 hybrid orbitals
4. D.sp3 hybrid orbitals

Answer and explanation locked

An enzyme used to decompose the lipids into fatty acids in our alimentary canal is

1. A.Amylase
2. B.Protease
3. C.Lipase
4. D.Urease

Answer and explanation locked

Molecules having one lone pair and three bond pairs have geometrical shape

1. A.Bent or angular
2. B.Trigonal
3. C.Trigonal pyramidal
4. D.Trigonal planer

Answer and explanation locked

Conversion of dihaloalkane into alkyne does not involve

1. A.Addition
2. B.Elimination
3. C.Base
4. D.Heat

Answer and explanation locked

Majority of reactions taking place at ordinary temperatures with -ΔH are

1. A.Endothermic
2. B.Exothermic
3. C.Thermally unstable
4. D.Reversible

Answer and explanation locked

Which one of the following is a coinage metal

1. A.Pd
2. B.Cu
3. C.Cd
4. D.Hg

Answer and explanation locked

Consider the given balanced chemical equation: 2H2 + O2 -> 2H2O If 4 g of H2 reacts with 32 g of O2 to produce 28 g of H2O, what is the percentage yield of the reaction? (Molar mass of H2 = 2 g/mol, O2 = 32 g/mol and H2O = 18 g/mol)

1. A.63.6%
2. B.77.8%
3. C.87.5%
4. D.92.5%

Answer and explanation locked

Amount of energy needed to weaken the existing bonds to an extent that can be broken through collision is called:

1. A.Bond energy
2. B.Activation energy
3. C.Average energy
4. D.Enthalpy

Answer and explanation locked

Which set of quantum numbers is not allowed for an electron.

1. A.n=2, l=1, m=0, s=+1/2
2. B.n=3, l=0, m=0, s=-1/2
3. C.n=2, l=2, m=+1, s=+1/2
4. D.n=1, l=0, m=0, s=+1/2

Answer and explanation locked

2A + B -> 3C + D which of the following does not express the reaction rate?

1. A.-d[B]/dt
2. B.d[D]/dt
3. C.-1/2 d[A]/dt
4. D.-1/3 d[C]/dt

Answer and explanation locked

Acetaldehyde undergoes oxidation to produce acetic acid, In this reaction oxidizing agent used is:

1. A.HI
2. B.LiAlH4
3. C.K2Cr2O7
4. D.NaBH4

Answer and explanation locked

Which one of the following has higher vapour pressure?

1. A.acetone
2. B.acetaldehyde
3. C.isopentane
4. D.Benzene

Answer and explanation locked

Terminal alkynes show acidic character due to:

1. A.Terminal carbon atoms are sp hybridized.
2. B.Terminal carbon atoms are sp2 hybridized.
3. C.Terminal carbon atoms are sp3 hybridized.
4. D.Terminal carbon atoms show hydrogen bonding.

Answer and explanation locked

Q99. Fischer ESTERIFICATION Is which type of reaction:

1. A.Condensation
2. B.Substitution
3. C.Elimination
4. D.Dehydrogenation

Answer and explanation locked

Q100. Shape of orbital is determined by quantum number:

1. A.n
2. B.l
3. C.m
4. D.s

Answer and explanation locked

Q101. The theories which explain the formation of sigma and pi bond are EXCEPT:

1. A.MOT
2. B.VBT
3. C.VSEPR
4. D.CFT

Answer and explanation locked

Q103. Final equation for the representation of rate of reaction in term of concentration is called

1. A.Rate law
2. B.Rate constant
3. C.Reaction rate
4. D.Reaction order

Answer and explanation locked

Q104. Poly vinyl chloride (PVC) is the type of?

1. A.Homopolymer
2. B.Thermosetting polymer
3. C.Thermoplastic polymer
4. D.Copolymor

Answer and explanation locked

Q105. Which of the following is true about pressure for an ideal gas at -273°C?

1. A.P=1atm
2. B.P=2atm
3. C.P=3atm
4. D.P=0 atm

Answer and explanation locked

Q106. Which of the following is basic buffer?

1. A.NH4OH/NH4Cl
2. B.NaOH/NaCl
3. C.NaOH/HCl
4. D.H2CO3/NaHCO3

Answer and explanation locked

Q107. What happens when H+ is added to ammonium hydroxide and ammonium chloride buffer?

1. A.more ammonium hydroxide is formed
2. B.reaction will move reverse
3. C.reaction will move forward
4. D.no effect on equilibrium

Answer and explanation locked

Q108. What is general requirement for free radical substitution reaction of ethane and halogen?

1. A.low pressure
2. B.low temperature
3. C.high pressure
4. D.heat and UV light

Answer and explanation locked

Q109. Which one of the following is not a characteristic of benzene?

1. A.Aromaticity
2. B.Stability
3. C.to follow Huckle rule
4. D.High reactivity

Answer and explanation locked

Q110. Correct arrangement of orbital according to size of hybridized orbitals?

1. A.sp>sp2>sp3
2. B.sp3> sp> sp2
3. C.sp2>sp>sp3
4. D.sp3>sp2>sp

Answer and explanation locked

Consider the equation H2 + O2 -> H2O, what volume of hydrogen gas is required to produce 1 mol of water at standard temperature & pressure?

1. A.11.2 dm3
2. B.22.4 dm3
3. C.10 dm3
4. D.58 dm3

Answer and explanation locked

A chemical reaction has a theoretical yield of 25 g, but only 20 g of product was obtained. What is the percentage yield of the reaction?

1. A.20%
2. B.25%
3. C.45%
4. D.80%

Answer and explanation locked

Which of the following situations most clearly demonstrates a key characteristic of a Redox reaction?

1. A.Water boiling to steam
2. B.Hydrogen gas reacting with chlorine to form hydrogen chloride gas
3. C.Sodium chloride dissolving in water
4. D.Ethanol evaporating at room temperature

Answer and explanation locked

If 100 KJ of heat is absorbed by the system and 40 KJ of work is done on the system what is the change of Internal energy?

1. A.-60 KJ
2. B.+60 KJ
3. C.-140 KJ
4. D.+140 KJ

Answer and explanation locked

Number of unpaired electrons present in the ground state of Fe3+ are (Atomic number of Fe=26).

1. A.Three
2. B.Four
3. C.Five
4. D.Six

Answer and explanation locked

If % yield and actual yield is 80 and 20g respectively, what will be theoretical yield?

1. A.20g
2. B.25g
3. C.30g
4. D.40g

Answer and explanation locked

Which of the following best identifies the redox reaction:

1. A.transfer of proton
2. B.transfer of electron
3. C.absorption of light
4. D.exchange of ions

Answer and explanation locked

Methanol is produced by reduction of

1. A.Formaldehyde
2. B.Acetaldehyde
3. C.Propanal
4. D.Propanone

Answer and explanation locked

IUPAC name of (CH3)3 CCH2 Br is

1. A.1-bromopentane
2. B.1-bromo-2,2,2-trimethylethane
3. C.1-bromo-2,2-dimethylpropane
4. D.2-bromopentane

Answer and explanation locked

Which one shows anisotropic behavior?

1. A.Wood
2. B.Gemstone
3. C.Coke
4. D.Graphite

Answer and explanation locked

Q121. In a unit cell of a crystal lattice the angle β is between faces:

1. A.a) a and b
2. B.b) b and c
3. C.c) c and a
4. D.d) not specified

Answer and explanation locked

Q122. Pick the crystalline solids:

1. A.a) Cement
2. B.b) Ceramics
3. C.c) Concrete
4. D.d) Copper

Answer and explanation locked

Q123. Number of unpaired electrons In Boron in ground state is/are:

1. A.a) 1
2. B.b) 2
3. C.c) 3
4. D.d) 4

Answer and explanation locked

Q124. Chlorination of benzene in the presence of Iron (III) chloride involves mechanism of:

1. A.a) Electrophilic addition
2. B.b) Electrophilic Substitution
3. C.c) Free radical Substitution
4. D.d) Free radical halogenation

Answer and explanation locked

Q125. The element with smallest value of ionization energy is

1. A.a) Li
2. B.b) Al
3. C.c) Ca
4. D.d) Ba

Answer and explanation locked

Q126. Carboxylic acid reacts with ammonia to form ammonium salts which on heating produces:

1. A.a) Carbonates
2. B.b) Alkane
3. C.c) Ester
4. D.d) Amide

Answer and explanation locked

Q127. If P is the momentum of an object and m is its mass, then its kinetic energy is:

1. A.a) P/2m
2. B.b) P^2/2m
3. C.c) 1/2 Pm^2
4. D.d) 1/2 P^2/m^2

Answer and explanation locked

Q128. The electric field at a point due to two equal and opposite charges is 100 N/C. If the magnitude of each charge is doubled then the electric field at that point becomes:

1. A.a) 50 N/C
2. B.b) 100 N/C
3. C.c) 200 N/C
4. D.d) 400 N/C

Answer and explanation locked

Q129. If a plastic sheet of relative permittivity 2.5 is inserted between two-point charges placed in vacuum, then the electrostatic force between them:

1. A.a) Increases by a factor of 2.5
2. B.b) Decreases by a factor of 2.5
3. C.c) Increases by a factor of 5
4. D.d) Decreases by a factor of 5

Answer and explanation locked

Q130. After 3 half-lives, the remaining fraction of a radioactive sample is:

1. A.a) 1/2
2. B.b) 1/4
3. C.c) 1/8
4. D.d) 1/16

Answer and explanation locked

Q131. If the horizontal range of a projectile becomes half of its maximum possible horizontal range, the probable angle of projection is;

1. A.a) 15º
2. B.b) 30º
3. C.c) 45º
4. D.d) 60º

Answer and explanation locked

Q132. In an ideal transformer, if the primary voltage is doubled and the turns ratio remains the same, what happens to the secondary current?

1. A.a) Doubles
2. B.b) Halves
3. C.c) Remains the same
4. D.d) Becomes four times

Answer and explanation locked

Q133. An angular displacement of 90° is equal to:

1. A.a) One-fourth revolution
2. B.b) One- third revolution
3. C.c) One half revolution
4. D.d) One complete revolution

Answer and explanation locked

Q134. The time in which half of the given number of radioactive nuclei decay is known as

1. A.a) 1/2 life of radioactive element.
2. B.b) 2/3 life of radioactive element.
3. C.c) 1/4 life of radioactive element.
4. D.d) 2/5 life of radioactive element.

Answer and explanation locked

Q135. Earth receives large amount of energy directly from:

1. A.a) Wind
2. B.b) Water
3. C.c) Sun
4. D.d) Moon

Answer and explanation locked

Q136. A phase difference of 90° is equal to:

1. A.a) π radians
2. B.b) π/2 radians
3. C.c) 2π radians
4. D.d) π/4 radians

Answer and explanation locked

Q137. The reciprocal of the resistivity of a material is called its:

1. A.a) impedance
2. B.b) conductivity
3. C.c) admittance
4. D.d) reactance

Answer and explanation locked

Q138. The Balmer series of hydrogen spectrum appears in the

1. A.a) Infrared region
2. B.b) Ultraviolet region
3. C.c) X-ray region
4. D.d) Visible region

Answer and explanation locked

Q139. A ball is thrown into the air with certain velocity v making an angle θ with horizontal. If air resistance is neglected, then at maximum height its velocity is:

1. A.a) Equal to initial velocity
2. B.b) Half of initial velocity
3. C.c) Equal to zero
4. D.d) Minimum but not zero

Answer and explanation locked

Q140. A canon is placed on a smooth surface. When it fires a shell, the canon moves backward, this recoil occurs due to:

1. A.a) law of conservation of energy
2. B.b) Backward thrust of the gases
3. C.c) Newton's third law of motion
4. D.d) Newton's first law of motion

Answer and explanation locked

Q141. If the surface charge density of an infinite sheet increases by 25%, the electric field intensity:

1. A.a) Increases by 25%
2. B.b) Increases by 50%
3. C.c) Decreases by 25%
4. D.d) Remains the same

Answer and explanation locked

Q142. An incompressible fluid flows through a pipe that becomes narrower in one section. The fluid speed in that region increases in that region to maintain:

1. A.a) Constant pressure
2. B.b) constant energy
3. C.c) constant mass flow rate
4. D.d) constant volume

Answer and explanation locked

Q143. In a pipe of varying cross-section as fluid enters the narrower region, it exhibits:

1. A.a) high velocity, high pressure
2. B.b) high velocity, low pressure
3. C.c) low velocity, high pressure
4. D.d) low velocity, low pressure

Answer and explanation locked

Q144. The curved shape of an airplane wing causes air to move faster over the top surface. This leads to:

1. A.a) greater pressure on the top
2. B.b) lower pressure on the top
3. C.c) equal pressure on both sides
4. D.d) zero pressure above the wing

Answer and explanation locked

Q145. The protons in the nucleus of an atom DO NOT exit due to

1. A.a) Electromagnetic force
2. B.b) Gravitational Force
3. C.c) Weak Nuclear Force
4. D.d) Strong Nuclear Force

Answer and explanation locked

Q146. Mechanical waves cannot travel through outer space because they:

1. A.a) have low speed in vacuum
2. B.b) disperse in space due to long wavelength
3. C.c) lose frequency in the absence of air
4. D.d) lose transmission without interacting particles

Answer and explanation locked

Q147. Terminal voltage of a cell equals its EMF only when:

1. A.a) No current flows
2. B.b) Current is maximum
3. C.c) Internal resistance is infinite
4. D.d) Load resistance is zero

Answer and explanation locked

Q148. A loop moves toward a stationary magnet. The induced current will:

1. A.a) enhance the motion
2. B.b) try to stop the approach
3. C.c) become zero
4. D.d) become alternating

Answer and explanation locked

Q149. The energy of a Simple Harmonic oscillation depends upon the:

1. A.a) frequency
2. B.b) time period
3. C.c) wavelength
4. D.d) amplitude

Answer and explanation locked

Q150. The wave that has the highest frequency & penetrating power is:

1. A.X-rays
2. B.Ultraviolet rays
3. C.Gamma rays
4. D.Microwaves

Answer and explanation locked

Q151. According to First law of thermodynamics when heat flows into a system and no work is done the internal energy of the system must

1. A.Increase
2. B.Decrease
3. C.Remains constant
4. D.Becomes zero

Answer and explanation locked

Q152. If the length of the conductor is made 4 times its original length, its resistance becomes

1. A.quarter
2. B.half
3. C.zero
4. D.4 times

Answer and explanation locked

Q153. The unit of temperature coefficient of resistivity is

1. A.1/C
2. B.1/K
3. C.1/A
4. D.1/Ω

Answer and explanation locked

Q154. The work done by the gravitational force on an object as it moves from a reference level to a higher point is

1. A.Always positive
2. B.Always negative
3. C.Zero
4. D.Depends on the path taken

Answer and explanation locked

Q155. If two speakers emit sound at same frequency and phase, maximum loudness occurs when:

1. A.Path difference = √2
2. B.Path difference = λ
3. C.Path difference = λ/4
4. D.Path difference = 3λ/43

Answer and explanation locked

Q157. A 0.5 kg ball moving at 6 m/s has kinetic energy

1. A.9 J
2. B.18 J
3. C.6 J
4. D.3 J

Answer and explanation locked

Q158. A fluid is flowing through a tube, to undergo transition from laminar to turbulent flow it's velocity must be:

1. A.Slightly less than critical velocity
2. B.equal to critical velocity
3. C.greater than critical velocity
4. D.increasing gradually but less than critical velocity

Answer and explanation locked

Q159. For two equal positive charges, the electric field weakest?

1. A.Midway between them
2. B.Along the perpendicular bisector
3. C.Close to either charge
4. D.At infinity

Answer and explanation locked

Q160. A projectile is launched in air with certain angle; its velocity is maximum at:

1. A.Point of projection
2. B.Highest point
3. C.Between launching and highest point
4. D.At all points

Answer and explanation locked

Q161. If the distance between two charges is halved and magnitude of charges are also doubled, then the force between these charges becomes:

1. A.two times
2. B.four times
3. C.eight times
4. D.sixteen times

Answer and explanation locked

Q162. If a body having mass m1 (2 kg), moving with 5 m/s approaches another mass, m2 (3 kg) with speed of 1 m/s in same direction, relative speed of approach is 4 m/s. Relative speed of separation after collision will be:

1. A.4 m/s
2. B.2 m/s
3. C.6 m/s
4. D.depends on masses

Answer and explanation locked

Q163. Which of the following sentences has correct subject verb agreement?

1. A.The teacher give the students homework.
2. B.The teacher gives the students homework.
3. C.The teachers gives the student homework.
4. D.The teachers given the student homework.

Answer and explanation locked

Q164. The keys were found ________ the drawer where you left them last week.

1. A.under
2. B.in
3. C.on
4. D.beside

Answer and explanation locked

Q165. Identify the sentence among of the following, which is punctuated correctly?

1. A.The teaching staff asked the principal what time the meeting would start.
2. B.The teaching staff asked the principal: "What time would the meeting start?"
3. C.The teaching staff asked the principal, "What time would the meeting start?"
4. D.The teaching staff asked the principal; "What time would the meeting start?"

Answer and explanation locked

Q166. "She was elated when she got first position in exams." What is the meaning of "elated" In this sentence?

1. A.Defeated
2. B.Worried
3. C.Excited
4. D.Mad

Answer and explanation locked

Q167. The board of directors expressed____________disappointment with the financial results.

1. A.their
2. B.its
3. C.his or her
4. D.one's

Answer and explanation locked

Q168. It rained all night; __________ the roads were flooded in the morning.

1. A.similarly
2. B.instead
3. C.as a result
4. D.in contrast

Answer and explanation locked

Q169. The manager accepted the cashier's ______ for coming late.

1. A.expalanation
2. B.explaination
3. C.explanation
4. D.explantion

Answer and explanation locked

Q170. The writer has unearthed serious irregularities in the entire project. The word 'unearthed' In this sentence means

1. A.written
2. B.mentioned
3. C.exposed
4. D.stated

Answer and explanation locked

Q171. Identify the sentence with no spelling error:

1. A.Imtiaz invited me on a dinner party at restaurant.
2. B.Imtiaz invited me on a dier party at restaurant.
3. C.Imtiaz invited me on a dinner party at restaurent.
4. D.Imtiaz invited me on a dinnar party at restaurent.

Answer and explanation locked

Q172. What will come next? 1, 4, 2, 5, 3, 6, 4, 7, ?

1. A.5
2. B.6
3. C.7
4. D.8

Answer and explanation locked

All daffodils are plants. All plants are living things. Some living things are real. Conclusions: I. All daffodils are living things. II. Some living things are flowers. III. All daffodils are real. Which conclusions follow?

1. A.Only I
2. B.Only I and II
3. C.Only II and III
4. D.All follow

Answer and explanation locked

One apple pie has 10 slices, and each apple pie feeds five people. Henry is having a party with 200 people. How many slices of pie does he need?

1. A.200
2. B.50
3. C.400
4. D.100

Answer and explanation locked

How many trees are in the orchard? Which of the statements below are needed to sufficiently answer this question? I. Ibrahim is a farmer and looks after half of the trees in the orchard II. 300 trees in the orchard are under Ibrahim's care

1. A.i is enough
2. B.ii is enough
3. C.both I and II are needed
4. D.neither i or ii are sufficient

Answer and explanation locked

P and Q are M's parents. M and N are siblings. Q is N's mother. What is P to M?

1. A.Mother
2. B.Father
3. C.Sister
4. D.Brother

Answer and explanation locked

Asad bought 50 packets of biscuits for the price of Rs. 500; whereas Anum bought 25 packets of chips for the price of Rs.1000. While comparing the prices of packets of biscuits and packet of chips, which of the following statements is correct?

1. A.Price of 4 packets of biscuits is equal to the price of 1 packet of chips
2. B.Price of 1 packet of biscuits is equal to the price of 4 packets of chips
3. C.Price of 2 packets of biscuits is equal to the price of 1 packet of chips
4. D.Price of 1 packet of biscuits is equal to the price of 2 packets of chips

Answer and explanation locked

The virus spreads rapidly in the town. It infected the people - First day: 8, Second day: 1 Third day: 32. What will the number of people infected on the next day?

1. A.44 people
2. B.56 people
3. C.64 people
4. D.74 people

Answer and explanation locked

Which of the following is a result of poor design that could cause an accident in the workplace?

1. A.Equipment failure
2. B.Slippery surfaces
3. C.Insufficient lighting
4. D.Unplanned workspace layout

Answer and explanation locked

Which of the following is the main cause of accidents involving equipment?

1. A.Overconfidence
2. B.Insufficient maintenance
3. C.Fatigue
4. D.Poor training

Answer and explanation locked