TET-Ctet-Chemistry-set-20

Chemistry MCQs for all Competitive Exams SET-20
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-20
रसायन विज्ञान बहुविकल्पीय प्रश्न


Question : 1-10

Question : 1

A body of mass x kg is moving with a velocity of 100 ms– 1. Its de Broglie wavelength is 6.62  ´ 10–35m.
Hence x is (h = 6.62 ´ 10– 34Js)

[A].   0.15 kg
[B].   0.2 kg
[C].   0.1 kg
[D].   0.25 kg


Question : 2

2 gm of a radioactive sample having half life of 15 days was synthesised on 1st Jan 2009. The amount of the sample left behind on 1st March. 2009 (including both the days)

[A].   1 gm
[B].   0.5 gm
[C].   0 gm
[D].   0.125 gm


Question : 3

A body of mass 10 mg is moving with a velocity of 100 ms–1. The wavelength of de-Broglie wave associated with it would be

(Note : h = 6.63 ´ 10–34Js)

[A].   6.63 ´ 10-37m
[B].   6.63 ´ 10-31m
[C].   6.63 ´ 10-34m
[D].   6.63 ´ 10-35m


Question : 4

2HI(g) -->  H2(g) + I2(g)

The equilibrium constant of the above reaction is 6.4 at 300 K. If 0.25 mole each of H2 and

I2 are added to the system, the equilibrium constant will be

[A].   3.2
[B].   1.6
[C].   6.4
[D].   0.8


Question : 5

A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved.
The pH of the resulting buffer is equal to ______.

[A].   pKa
[B].   pKa - Log2
[C].   pKa + Log2
[D].   pKa + 2


Question : 6

5 moles of SO2 and 5 moles of O2 are allowed to react. At equilibrium, it was found that 60% of SO2 is used up. lf the partial pressure of the equilibrium mixture is one atmosphere. the partial pressure of O2 is

[A].   0.21 atm
[B].   0.41 atm
[C].   0.82 atm
[D].   0.52 atm


Question : 7

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

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


Question : 8

Which one of these is NOT TRUE for benzene?

[A].   It forms only one type of monosubstituted product
[B].   There are three carbon-carbon single bonds and three carbon-carbon double bonds
[C].   Heat of hydrogenation of benzene is less than the theoretical value
[D].   The bond angle between carbon-carbon bonds is 120°


Question : 9

A complex compound in which the oxidation number of a metal is zero is

[A].   K4 [Fe (CN)6]
[B].   K3 [Fe (CN)6]
[C].   [Ni (CO)4]
[D].   [Pl (NH3 )4]Cl2


Question : 10

Which one of the following is paramagnetic?

[A].   N2
[B].   NO
[C].   CO
[D].   O





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