Subject

Chemistry

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

 Multiple Choice QuestionsMultiple Choice Questions

1.

Consider the molecules CH4, NH3 and H2O. Which of the given statement is false?

  • The H-O-H bond angle in H2O  is larger than the H-C-H bond angle in CH4.

  • The H-O-H bond angle in H2O is smaller than the H-N-H bond angle in NH3.

  • The H-C-H bond angle in CH4 is larger than the H-N-H bond angle in NH3

  • The H-C-H bond angle in CH4 is larger than the H-N-H bond angle in NH3


A.

The H-O-H bond angle in H2O  is larger than the H-C-H bond angle in CH4.

Consider the molecules CH4, NH3 and H2O. Which of the given statement is false?

2269 Views

2.

The electronic configuration of Eu (Atomic no.63), Gd (Atomic no. 64) and Tb (Atomic no. 65) are

  • [Xe]4f6 5d1 6s2, [Xe] 4f7 5d1 6s2 and [Xe] 4f9  6s2 

  • [Xe] 4f6 5d1 6s2 , [Xe] 4f7 5d1 6s2 and [Xe] 4f8 5d1 6s2 

  • [Xe] 4f7  6s2, [Xe] 4f7 5d1 6s2 and [Xe] 4f9 6s2 

  • [Xe] 4f7  6s2, [Xe] 4f7 5d1 6s2 and [Xe] 4f9 6s2 


C.

[Xe] 4f7  6s2, [Xe] 4f7 5d1 6s2 and [Xe] 4f9 6s2 

The electronic configuration of Eu (Atomic no.63), Gd (Atomic no. 64) and Tb (Atomic no. 65) are

1993 Views

3.

The addition of a catalyst during a chemical reaction alters which of the following quantities ?

  • Internal energy

  • Enthalpy

  • Activation energy

  • Activation energy


C.

Activation energy

The addition of a catalyst during a chemical reaction alters which of the following quantities ?

5107 Views

4.

The pair of an electron in the given carbanion,CH subscript 3 straight C identical to straight C to the power of minus is present in which orbital? 

  • sp3

  • sp2

  • sp

  • sp


C.

sp

The pair of an electron in the given carbanion,CH subscript 3 straight C identical to straight C to the power of minus is present in which orbital? 

2075 Views

5.

The correct thermodynamic conditions for  the spontaneous reaction at all temperatures is

  • ΔH> 0 and Δ S< 0
  • ΔH< 0 and ΔS > 0
  • ΔH ΔS >0
  • ΔH ΔS >0

B.

ΔH< 0 and ΔS > 0

The correct thermodynamic conditions for  the spontaneous reaction at all temperatures is

1844 Views

6.

Which one of the following characteristics is associated with adsorption?

  • ΔG, ΔH and  ΔS all are negative

  • ΔG and  ΔH are negative but  ΔS is positive

  • ΔG and  ΔS are negative but  ΔH is positive

  • ΔG and  ΔS are negative but  ΔH is positive


A.

ΔG, ΔH and  ΔS all are negative

Which one of the following characteristics is associated with adsorption?

1250 Views

7.

In which of the following options the order of arrangement does not agree with the variation of the property indicated against it?

  • B<C<N<O (increasing first ionisation enthalpy)

  • I<Br<Cl<F(increasing electron gain enthalpy)

  • Li<Na<K<Rb (increasing metallic radius)

  • Li<Na<K<Rb (increasing metallic radius)


B.

I<Br<Cl<F(increasing electron gain enthalpy)

In which of the following options the order of arrangement does not agree with the variation of the property indicated against it?

1124 Views

8.

Two electrons occupying the same orbital are distinguished by

  • Magnetic quantum number

  • Azimuthal quantum number

  • Spin quantum number

  • Spin quantum number


C.

Spin quantum number

Two electrons occupying the same orbital are distinguished by

1693 Views

9.

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

  • 1/4

  • 3/8

  • 1/2

  • 1/2


D.

1/2

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

3652 Views

10.

Predict the correct order among the following.

  • long pair-lone pair> bond pair-bond pair> lone pair>bond pair

  • bond pair-bond pair> lone pair-bond pair > lone pair -lone pair

  • lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

  • lone pair -bond pair > bond pair- bond pair> lone pair -lone pair


D.

lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

Predict the correct order among the following.

1473 Views