Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which ofthe following statements is incorrect?

  • Li+ has minimum degree of hydration.

  • The oxidation state of K in KO2 is + 1.

  • Na is used to make a Na/Pb alloy.

  • MgSO4 is readily soluble in water.


A.

Li+ has minimum degree of hydration.

Which ofthe following statements is incorrect?


2.

What is the oxidation number of Br in KBrO4?

  • + 6

  • + 7

  • + 5

  • + 8


B.

+ 7

What is the oxidation number of Br in KBrO4?


3.

Which of the following pairs represent isotones?

  • As3377,Se34 78

  • Pt78195,Os76190

  • Ag47108,Cd48112

  • Hf72178,Ba56137


A.

As3377,Se34 78

Which of the following pairs represent isotones?


4.

Which is correct regarding size of atom?

  • N < O

  • B < Ne

  • V > Ti

  • Na > K


B.

B < Ne

Which is correct regarding size of atom?


5.

Which of the following is not sp2 hybridised?

  • Graphite

  • Graphene

  • Fullerene

  • Dry ice


D.

Dry ice

Which of the following is not sp2 hybridised?


6.

Choose the correctly paired gaseous cation and its magnetic (spin only) moment (in B.M.)

  • Ti2+,3.87 B.M.

  • Cr2+, 4.90 B.M.

  • Co3+,3.87 B.M.

  • Mn2+,4.90 B.M.


B.

Cr2+, 4.90 B.M.

Choose the correctly paired gaseous cation and its magnetic (spin only) moment (in B.M.)


7.

The equilibrium constant for the reaction,

12H2(g)+12I2(g)HI(g)is Kc

Equilibrium constant for the reaction 2HI(g)H2(g) + I2(g) will be

  • 1/Kc

  • 1/(Kc)2

  • 2/Kc

  • 2/(Kc)2


B.

1/(Kc)2

The equilibrium constant for the reaction,

12H2(g)+12I2(g)HI(g)is Kc

Equilibrium constant for the reaction 2HI(g)H2(g) + I2(g) will be


8.

Which of the following represents the correct bond order?

  • O2+<O2->O22-

  • O2->O22->O2+

  • O22->O2+>O2-

  • O2+>O2->O22-


D.

O2+>O2->O22-

Which of the following represents the correct bond order?


9.

A diatomic gas at pressure P, compressed adiabatically to half of its volume, what is the final pressure?

  • (2)1.4P

  • P/(2)1.4

  • (2)5/3P

  • P/(2)5/3


A.

(2)1.4P

A diatomic gas at pressure P, compressed adiabatically to half of its volume, what is the final pressure?


10.

In O3molecule, the formal charge on the central O-atom is

  • 0

  • -1

  • -2

  • +1


D.

+1

In O3molecule, the formal charge on the central O-atom is