Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Fermentation is :

  • reversible

  • exothermic

  • endothermic

  • None of these


2.

The ionisation percentage of 0.2 M HCN the solution is 0.02%. What will be the value of ionisation constant ?

  • 8 x 10-5

  • 8 x 10-9

  • 8 x 10-7 

  • 8 x 10-3


3.

Which one act as Bronsted acid as well as Bronsted base?

  • Cl-

  • OH-

  • HCl

  • H2O


4.

If the pH of HCl soltion is 2 then the molar concentration of this will be :

  • 0.01 M

  • 2 M

  • 0.4 M

  • 0.02 M


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5.

BF3 molecule is :

  • Lewis base

  • Lewis acid

  • Neutral

  • None of these


6.

Number of electron in one molecule of NH3 :

  • 17

  • 34

  • 7

  • 10


7.

The value of magnetic quantum number for l = 3 :

  • 0 , +1 , +2 , +3

  • 0 , ± 1 , ± 2 , ± 3

  • -1 , -2 , -3

  • ± 1 , ± 2 , ± 3


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8.

The geometry of ammonia is :

  • tetrahedral

  • pyramidal

  • triangular

  • trigonal bipyrarnidal


D.

trigonal bipyrarnidal

Hybridisation state in NH3 is sp3 , But its geometry is trigonal bipyramidal due to the presence of lone pair on N atom .


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9.

Which one have the highest melting point ?

  • CsCl

  • NH3

  • He

  • CHCl3


10.

NO212 O2  NO3 .......K1

2NO2 + O2  2NO3 ........K2

For the above reaction the relation between equilibrium constant is :

  • K2 = (K1)2

  • K21K1

  • K21K12

  • K1 = K2


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