TET-Ctet-Chemistry-set-55

Chemistry MCQs for all Competitive Exams SET-55
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-55
रसायन विज्ञान बहुविकल्पीय प्रश्न


Question : 1-10

Question : 1

For the reversible reaction,
A(s) + B(g) ⇌ C(g) + D(g) ΔG° = –350 kJ,
which one of the following statements is true?

[A].   The entropy change is negative
[B].   The reaction is thermodynamically nonfeasible
[C].   The reaction should be instantaneous
[D].   Equilibrium constant is greater then one.


Question : 2

Glucose contains in addition to aldehyde group

[A].   one secondary OH and four primary OH groups
[B].   one primary OH and four secondary OH groups
[C].   two primary OH and three secondary OH groups
[D].   three primary OH and- two secondary OH groups


Question : 3

Equal weights of CH4 and H2 are mixed in a container at 25°C. Fraction of total pressure exerted by methane is

[A].   1/2
[B].   1/3
[C].   1/9
[D].   8/9


Question : 4

In Tollen's test, aldehydes

[A].   Are oxidised to acids
[B].   Are reduced to alcohol
[C].   Neither reduced nor oxidised
[D].   Precipitate Ag+ as AgCI


Question : 5

Methyl bromide is converted into ethane by heating it in ether medium with

[A].   Al
[B].   Zn
[C].   Na
[D].   Cu


Question : 6

Osmotic pressure observed when benzoic acid is dissolved in benzene is less than that expected from theoretical considerations. This is because

[A].   benzoic acid is an organic solute
[B].   benzoic acid has higher molar mass than benzene
[C].   benzoic acid gets associated in benzene
[D].   benzoic acid gets dissociated in benzene


Question : 7

The amount of heat evolved when 500 cm3of 0.1 M HCl is mixed with 200 cm3 of 0.2 M NaoH is

[A].   2.292 kJ
[B].   1.292 kJ
[C].   22.9 kJ
[D].   0.292 kJ


Question : 8

The concentration of a reactant X decreases from 0.1 M to 0.025 M in 40 minutes. If the reaction follows I order kinetics, the rate of the reaction when the concentration of X is 0.01 M will be

[A].   1.73 ´ 10-4 M min-l
[B].   2.47 ´ 10-4 M min-l
[C].   3.47 ´ 10-5 M min-l  
[D].   1.73 ´ 10-5 M min-l


Question : 9

The energy of an electron in first Bohr orbit of H – atom is – 13.6 eV. The possible energy value of electron in the excited state of Li2+ is

[A].   –122.4 eV
[B].   30.6 eV
[C].   –30.6 eV
[D].   13.6 eV


Question : 10

The enthalpy of vaporization of benzene is +35.3 kJ/mol at its boiling point of 80°C. The entropy change in the transition of vapour to liquid at its boiling point is ______.[in J mol–1K–1 ]

[A].   +100
[B].   –100
[C].   –342
[D].   +342





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