MDCAT Chemistry MCQs

Alkyl halides involving –C –X bond breakage and –C –Nu bond formation simultaneously would follow the mechanism

1. A.SN1
2. B.SN2
3. C.E1
4. D.E2

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Phenol is known as:

1. A.Carpolic acid
2. B.Carbonylic acid
3. C.Carbolic acid
4. D.Carbolylic acid

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Phenol is more acidic than alcohols because of the following reason:

1. A.Delocalization of negative charge in the OH group
2. B.Delocalization of positive charge on the carbon atom in ring
3. C.Delicalization of negative charge in the ring
4. D.Delocalization of positive charge on the OH group

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which of the following reagent is use to separate and purify carbonyl and non- carbonyl compounds?

1. A.HCN
2. B.BrMgCH3
3. C.NaHSO3
4. D.H2O

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Hydrolysis of acyl chloride results in the formation of:

1. A.Acid anhydride
2. B.Carboxylic acid
3. C.Amides
4. D.Esters

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The exact reactivity order for carboxylic acid derivatives is:

1. A.Anhydride >acylchloride> ester
2. B.Ester > anhydride >acylchloride
3. C.Amide >acylchloride> ester
4. D.Acychloride> anhydride > Ester

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Based on the physio – chemical properties, proteins may be classified into the following types:

1. A.Simple proteins
2. B.Compound proteins
3. C.Derived proteins
4. D.All of the above

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Based on function, thyroxin can be classified as:

1. A.Hormonal protein
2. B.Structural protein
3. C.Transport protein
4. D.Genetic protein

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L-Asparaginase enzyme has been used for the treatment of:

1. A.Jaundice
2. B.Blood cancer
3. C.Rickets
4. D.Heat disease

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Potassium, Rubidium, Cesium react with oxygen to form which types of oxides?

1. A.Peroxide
2. B.Superoxide
3. C.Suboxide
4. D.Normal oxide

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Magnesium reacts with nitrogen to form:

1. A.Mg2N2
2. B.Mg3N2
3. C.MgN2
4. D.MgN

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Densities of alkali metals are low due to:

1. A.Weak intermolecular forces
2. B.Large atomic volume
3. C.Smaller size
4. D..ns1 configuration

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In 3rd series of transition elements, paramagnetic behavior is maximum for Mn+2 and:

1. A.Cr3+
2. B.Ti3+
3. C.V3+
4. D.Zn+2

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Electronic configuration of chromium (proton number 24) is:

1. A.[Ar] 3d4 4S2
2. B.[Ar} 3d5 4S2
3. C.[Ar] 3d5 4S1
4. D.[Ar] 3d6 4S2

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The transition element which does not show variable valencyos:

1. A.Cu
2. B.Sc
3. C.Zn
4. D.Cr

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Select the organic compound which belongs to Arene family;

1. A.CH2=CH2
2. B.CH3-o-CH3
3. C.CH3□ NH2
4. D.C6H6

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The type of isomerism existing in a compound of molecular formula C2H60 is:

1. A.Functional group
2. B.Position
3. C.Chain
4. D.Metamerism

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Generic formula of cycloalkane is?

1. A.CnH2n+2
2. B.CnH2n
3. C.CnH2n+1
4. D.CnH2n-2

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Electrophile in sulphonation of benzene is:

1. A.HSO4-
2. B.H2SO4
3. C.SO3
4. D.HSO3-

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Acetophenoe can be formed by which of the following reaction of benzene?

1. A.Alkylation
2. B.Acylation
3. C.Halogenation
4. D.Nitration

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In alkanes, each carbon has hybridization:

1. A.Sp3
2. B.Sp
3. C.SP2
4. D.Dsp

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When CH3 is attached with the benzene ring, it makes the ring:

1. A.Good Electrophile
2. B.Good nucleophile
3. C.Resonance hybrid
4. D.Extraordinary stable

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Which of the following reaction has greater Kp than Kc (kp>Kc)

1. A.2NO + Cl2 = 2NOCi
2. B.2SO2 + O2 = 2SO3
3. C.2NOCi = 2No + Cl2
4. D.N2 + 3H2 = 2NH3

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The equation N2g + 3H2g = 2NH3, represents:

1. A.Contact process
2. B.Haber’s process
3. C.Solvay process
4. D.Avagadro’s law

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The unit of the rate constant is the same as that of the rate of reaction in:

1. A.Zero order reaction
2. B.First order reaction
3. C.Second order reaction
4. D.Third order reaction

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The study of rates of chemical reactions and the factors that affect the rates of chemical reactions is known as:

1. A.Thermodynamics
2. B.Stoichiometry
3. C.Electrochemistry
4. D.Chemical kinetics

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For the reaction A(g) -> products, when the concentration of A(g) doubles, the rate of reaction increases four fold, which means it is:

1. A.Negative order reaction
2. B.First order reaction
3. C.Zero order reaction
4. D.Second order reaction

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For which of the following order of the reaction, rate of reaction in inversely proportional to the concentration reaction?

1. A.1st order reaction
2. B.2nd order reaction
3. C.Negative order of reaction
4. D.Zero order of reaction

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The thermal energy at constant pressure is called:

1. A.Enthalpy
2. B.Internal energy
3. C.Heat capacity
4. D.Work done

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Born-Haber cycle is used to determine the lattice energies of:

1. A.Molecular solids
2. B.Metallic solids
3. C.Ionic solids
4. D.Covalent solids

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The oxidation state of ‘S’ in the (S2O3) -2 is:

1. A.+4
2. B.+6
3. C.-2
4. D.+2

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The common oxidation number of halogens is:

1. A.-1
2. B.+1
3. C.-2
4. D.0

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During oxidation process, oxidation number of an element:

1. A.Decreases
2. B.Increases
3. C.Remains constant
4. D.Both A&B

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Which of the following has the height value of electronegativity?

1. A.1
2. B.Br
3. C.Cl
4. D.F

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Which of the following hybrid orbitals has maximum ‘S’ –character?>

1. A.Sp3 – hybrid orbital
2. B.Sp2 – hybrid orbital
3. C.Sp – hybrid orbital
4. D.Dsp2 – hybrid orbital

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The first ionization energy is maximum for:

1. A.Na
2. B.Mg
3. C.Al
4. D.K

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The efficiency of chemical reaction cay be expressed as:

1. A.Theoretical yield
2. B.Actual yield
3. C.%yield
4. D.Maximum yield

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In a vessel, 10g N2, 10g H and 10g O2 are present. Which one will have least number of atoms?

1. A.H2
2. B.N2
3. C.O2
4. D.Both H2 & N2

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The empirical formula of Glucose C6H12O6 is:

1. A.C6H12O16
2. B.CHO
3. C.CH2O
4. D.CH2O2

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The relationship between quantum number n and I is:

1. A.N = 1-1
2. B.I = n-2
3. C.I = n-1
4. D.N = 1-2

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Quantum number values for ‘2p’ orbitals are:

1. A.N=2, I=1
2. B.N=1, I=2
3. C.N=1, I=0
4. D.N=2, I=0

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Which pair has 1 electron in it’s ‘s’ orbital?

1. A.Li, Fe
2. B.Na & Cr
3. C.K &Mn
4. D.H & He

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According to the general gas equation density of an ideal gas depends upon:

1. A.Pressure
2. B.Temperature
3. C.Molar mass of the gas
4. D.All of the above

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CO2 and SO2 both are tri-atomic molecules but heat of vaporization of SO2 is greater than that of CO2 due to:

1. A.High electronegativity of S
2. B.Greater size of SO2
3. C.SO2 is polar and CO2 is non-polar
4. D.SO2 is more acidic than CO2

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Which of the following has the lowest vapour pressure at 20oC?

1. A.Diethyl ether
2. B.Chloroform
3. C.Carbon tetrachloride
4. D.Water

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The lattice energy is also called as:

1. A.Enegy of affinity
2. B.Bond energy
3. C.Crystal energy
4. D.Potential energy

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For a gaseous phase reaction, when number of moles of reactants and products are equal:

1. A.The values of Kp and Kc are different
2. B.The values of Kp is greater than Kc
3. C.The values of Kc is greater than Kp
4. D.The values of Kp and KC are the same

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Purification of table salt (NaCl) by passing HCI gas through its saturated aqueous solution is an example of:

1. A.Lawa of mass action
2. B.Hess’s law
3. C.Common ion effect
4. D.Henry’s law

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