Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Among the following the strongest acid is

  • CH3COOH

  • C6H5COOH

  • m-CH3OC6H4COOH

  • p-CH3OC6H4COOH


C.

m-CH3OC6H4COOH

Among the following the strongest acid is


2.

The paramagnetic species is

  • KO2

  • SiO2

  • TiO2

  • BaO2


A.

KO2

The paramagnetic species is


3.

Among the following the weakest base is

  • C6H5CH2NH2

  • C6H5CH2NHCH3

  • O2NCH2NH2

  • CH3NHCHO


D.

CH3NHCHO

Among the following the weakest base is


4.

Intermolecular hydrogen bonding is strongest in

  • methylamine

  • phenol

  • formaldehyde

  • methanol


D.

methanol

Intermolecular hydrogen bonding is strongest in


5.

MnO42- (1 mole) in neutral aqueous medium is disproportionated to

  • 2/3 mole of MnO4- and 1/3 mole of MnO2

  • 1/3 mole of MnO4- and 2/3 mole of MnO2

  • 1/3 mole of Mn2O7 and 1/3 mole of MnO2

  • 2/3 mole of Mn2O7 and 1/3 mole of MnO2


A.

2/3 mole of MnO4- and 1/3 mole of MnO2

MnO42- (1 mole) in neutral aqueous medium is disproportionated to


6.

Which of the following compounds possesses the C-H bond with the lowest bond dissociation energy?

  • Toluene

  • Benzene

  • n-Pentane

  • 2,2-Dimethylpropane


A.

Toluene

Which of the following compounds possesses the C-H bond with the lowest bond dissociation energy?


7.

Which of the following are arranged in the decreasing order of dipole moment?

  • CH3Cl, CH3Br, CH3F

  • CH3Br, CH3Cl, CH3F

  • CH3Cl, CH3Br, CH3F

  • CH3Br, CH3F, CH3Cl


B.

CH3Br, CH3Cl, CH3F

Which of the following are arranged in the decreasing order of dipole moment?


8.

The ion which is not tetrahedral in shape is

  • BF4-

  • NH4+

  • Cu(NH3)42+

  • NiCl42-


C.

Cu(NH3)42+

The ion which is not tetrahedral in shape is


9.

One gram sample of NH4NO3 is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12 K. The heat capacity of the system is 1.23 kJ/g/deg. What is the molar heat of decomposition for NH4NO3 ?

  • -7.53 kJ/mol

  • -398.1 kJ/mol

  • -16.1 kJ/mol

  • -602 kJ/mol


D.

-602 kJ/mol

One gram sample of NH4NO3 is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12 K. The heat capacity of the system is 1.23 kJ/g/deg. What is the molar heat of decomposition for NH4NO3 ?


10.

Which one of the following has S° greater than zero?

  • CaO(s) + CO2(g)  CaCO3(s)

  • NaCl(aq) NaCl(s)

  • NaNO3(s)  Na+(aq) + NO3-(aq)

  • N2(g) + 3H2(g)  2NH3(g)


C.

NaNO3(s)  Na+(aq) + NO3-(aq)

Which one of the following has S° greater than zero?