Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

A gaseous mixture was prepared by taking equal moles of CO and N2, If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is

  • 0.8 atm

  • 0.9 atm

  • 1 atm

  • 0.5 atm

1793 Views

2.

If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?

  • p = f(T) at constant (x/m)

462 Views

3.

Which of the two ions from the list given below have the geometry that is explained by the same hybridization of orbitals

816 Views

4.

If the enthalpy change for the transition of liquid water to steam is 30kJ mol-1 at 27oC, the entropy change for the process would be. 

  • 1.0 J mol- K-1

  • 0.1 J mol-1 K-1

  • 100 J  mol-1 K-1

  • 10 J mol-1 K-1

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5.

The Correct order of increasing bond length of C - H, C-O, C - C and C = C is

  • C - C < C=C < C - O < C - H

  • C - O < C - H < C - C < C = C

  • C - H < C - O <  C - C < C= C

  • C - H  < C = C < C - O < C - C

546 Views

6.

Which of the following is least likely to behave as Lewis base? 

  • NH3

  • BF3

  • OH-

  • H2O

475 Views

7.

A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH4 is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8 x 10-5, what is the pH of this solution?

log ( 2.7 = 0.43)

  • 9.43

  • 11.72

  • 8.73

  • 9.08

981 Views

8.

Which of the following is the correct option for free expansion of an ideal gas under an adiabatic condition?

750 Views

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9.

Enthalpy change for the reaction,

4H (g) → 2H2 (g) is - 869.6 kJ

The dissociation energy of H - H bond is

  • -869.6 kJ

  • +434.8 kJ

  • +217.4 kJ

  • +217.4 kJ


B.

+434.8 kJ

4H (g) → 2H2 (g); ΔH = - 869.6 kJ

2H2 (g) → 4 H (g); ΔH =  869.6 kJ

H2 (g) → 2 H (g); ΔH = 869.6/2 = 434.8 kJ

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10.

Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49u. Molecular mass of B will be

  • 12.25 u

  • 6.50 u 

  • 25.00 u

  • 25.00 u

445 Views

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