Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

when I- is oxidised by MnO4- in an alkaline medium I- converts into

  • IO3-

  • I2

  • IO4-

  • IO-


12.

Which of the following region is coldest?

  • Stratosphere

  • Troposphere

  • Mesosphere

  • Thermosphere


13.

In which of the following, the oxidation number of oxygen has been arranged in increasing order?

  • BaO2 < KO2 < O3 < OF2

  • OF2 < KO2 < BaO2 <O3

  • BaO2 < O3 < OF2 < KO2

  • KO2 < OF2 < O3 < BaO2


14.

The normality of 10% (w/v) of acetic acid is

  • 1 N

  • 1.3 N

  • 1.7 N

  • 1.9 N


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15.

Consider the following solutions, 

A = 0.1 M glucose,

B = 0.05 M NaCl,

C = 0.05 M BaCl2

D = 0.1 M AlCl3

Which of the following pairs is isotonic?

  • A and B

  • A and D

  • A and C

  • B and C


16.

Which of the following compound is not coloured?

  • Na2CuCl

  • Na2Cd.Cl4

  • FeSO4

  • VI3


17.

Which of the following oxide is most acidic?

  • As2O3

  • P2O5

  • Sb2O3

  • Bi2O3


18.

when CO2 is bubbled through a solution of barium peroxide in water then

  • Carbonic acid is formed

  • O2 is released

  • H2O2

  • No reaction occurs


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19.

The correct increasing order of ionic radii of the following Ce3+, La3+, Pm3+ and Yb3+ is 

  • Yb3+ < Pm3+< Ce3+<La3+

  • Ce3+< Yb3+<Pm3+<La3+

  • Yb3+< Pm3+< La3+<Ce3+

  • Pm3+ < La3+< Ce3+ < Yb3+


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20.

The shape of gaseous SnCl2 is

  • Tetrahedral

  • Linear

  • Angular

  • T-shape


C.

Angular

Total no. of valence electron for Sn = 4
Total no. of valence electron for Cl = 7
Thus total number of valence electron for SnCl2 = 4 + 7 x 2 = 18
Bond pair = 2
Number of electrons used to complete the octets and duet = 8 x 2 = 16
No. of lone pair = 1

SnCl2 has sp2 hybridisation with one lone pair of electrons. Thus has angular shape. 


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