Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The valence shell electronic configuration of Cr2+ ion is :

  • 4s03d4

  • 3p64s2

  • 4s33d2

  • 4s23d0


A.

4s03d4

The valence shell electronic configuration of Cr2+ ion is :


2.

If the solubility of PbCl2 at25°C is 6.3 x 10-2mol/L , its solubility product is :

  • 1 x 10-6

  • 1 x 10-3

  • 1.1 x 10-6

  • 1.1 x 10-5


B.

1 x 10-3

If the solubility of PbCl2 at25°C is 6.3 x 10-2mol/L , its solubility product is :


3.

Ionisation potential is lowest for :

  • alkali metals

  • inert gases

  • halogens

  • alkaline earth metals


A.

alkali metals

Ionisation potential is lowest for :


4.

A double bond connecting two atoms .There is a sharing of :

  • 2 electrons

  • 1 electron

  • 4 electrons

  • All electrons


C.

4 electrons

A double bond connecting two atoms .There is a sharing of :


5.

The percentage of p-character in the orbitals forming P-P bond in P4 is :

  • 25

  • 33

  • 50

  • 75


D.

75

The percentage of p-character in the orbitals forming P-P bond in P4 is :


6.

From elementary molecular orbital theory we can deduce the electronic configuration of the singly positive nitrogen molecular ion as :

  • σ1s2σ*1s2σ2s2σ*2s2π2p4σ2p1

  • σ1s2σ*1s2σ2s2σ*2s2σ2p2π2p3

  • σ1s2σ*1s2σ2s2σ*2s2σ2p3 , π2p2

  • σ1s2σ*1s2σ2s2σ*2s2σ2p2π2p4


A.

σ1s2σ*1s2σ2s2σ*2s2π2p4σ2p1

From elementary molecular orbital theory we can deduce the electronic configuration of the singly positive nitrogen molecular ion as :


7.

pH of a solution can be expressed as :

  • -loge [H+]

  • -log10 [H+]

  • loge [H+]

  • log10[H+]


B.

-log10 [H+]

pH of a solution can be expressed as :


8.

Which of the following has largest atomic radii ?

  • Al

  • Al+

  • Al2+

  • Al3+


A.

Al

Which of the following has largest atomic radii ?


9.

The structure of IF5 can be best described as :

  • None of these


D.

None of these

The structure of IF5 can be best described as :


10.

A solution contains 25% H2O , 25% C2H5OH and 50% CH3COOHby mass .The mole fractionof H2O would be :

  • 0.25

  • 2.5

  • 0.502

  • 5.03


C.

0.502

A solution contains 25% H2O , 25% C2H5OH and 50% CH3COOHby mass .The mole fractionof H2O would be :