TET-Ctet-Chemistry-set-51

Chemistry MCQs for all Competitive Exams SET-51
Chemistry Multiple Choice Questions

Chemistry Multiple Choice Questions(MCQ)
रसायन विज्ञान बहुविकल्पीय प्रश्न

Welcome to our exclusive collections of chemistry multiple choice questions with answers. All questions are of multiple choice type.In these MCQs sets we are going to share most important questions related to chemistry. These questions are very helpful for those candidates and aspirants who are preparing for the various government and non government exam as well as in interview.
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Chemistry MCQs for all Competitive Exams SET-51
रसायन विज्ञान बहुविकल्पीय प्रश्न


Question : 1-10

Question : 1

For a reaction to be spontaneous at all temperatures

[A].   ΔG and ΔH should be negative
[B].   ΔG and ΔH should be positive
[C].   ΔG = ΔS = 0
[D].   ΔH < ΔG


Question : 2

Generally, the first ionization energy increases along a period. But there are some exceptions. The one which is NOT an exception is ______.

[A].   Be and B
[B].   Na and Mg
[C].   Mg and Al
[D].   N and O


Question : 3

Hydrogen bond is strongest in

[A].   S — H ——  O
[B].   O — H ——  S
[C].   F — H ——  F
[D].   O — H ——  N


Question : 4

chromite ore, the oxidation number iron and chromium are respectively ______.

[A].   +3, +6
[B].   +3, +2
[C].   +2, +3
[D].   +2, +6


Question : 5

Increasing order of carbon-carbon bond length for the following is
C2H4        C2H2        C6H6        C2H6
  (A)          (B)          (C)        (D)

[A].   C < B < A < D
[B].   B < C < A < D
[C].   D < C < A < B
[D].   B < A < C < D


Question : 6

NO2 is not obtained on heating

[A].   AgNO3
[B].   KNO3
[C].   Cu(NO3)2
[D].   Pb(NO3)2


Question : 7

Platinum, Palladium and Iridium are called noble metals because

[A].   Alfred Nobel discovered them
[B].   They are shining lustrous and pleasing to look at
[C].   They are found in native state
[D].   They are inert towards many common reagents.


Question : 8

The basicity of aniline is less than that of cyclohexylamine. This is due to

[A].   +R effect of -NH2 group
[B].   -I effect of -NH2 group
[C].   -R effect of -NH2 group
[D].   hyperconjugation effect


Question : 9

The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is

[A].   56 g
[B].   28 g
[C].   42 g
[D].   20 g


Question : 10

The half life time of 2g sample of radioactive nuclide 'X' is 15 min. The half life time of 1g sample of X is

[A].   7.5 min
[B].   15 min
[C].   22.5 min
[D].   30 min





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