TET-Ctet-Chemistry-set-29

Chemistry MCQs for all Competitive Exams SET-29
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-29
रसायन विज्ञान बहुविकल्पीय प्रश्न


Question : 1-10

Question : 1

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 : 2

Identify the reaction that does not take place in a blast furnace.

[A].   CaCO3 → CaO + CO2
[B].   CaO + Si O2 → Ca Si O2 → Ca Si O3
[C].   2Fe2O3 + 3C → 4Fe + 3CO2
[D].   CO2 + C → 2CO


Question : 3

Which of the following is least likely to behave is Lewis base?

[A].   OH–
[B].   H2O
[C].   NH3
[D].   BF3


Question : 4

In acetylene molecule, between the carbon atoms there are

[A].   Three sigma bonds
[B].   Two sigma and one pi bonds
[C].   One sigma and two pi bonds
[D].   Three pi bonds


Question : 5

Which one of these is NOT true for benzene?

[A].   There are three carbon-carbon single bonds and three carbon-carbon double bonds.
[B].   It forms only one type of mono substituted product.
[C].   The bond angle between the carbon-carbon bonds is 1200.
[D].   The heat of hydrogenation of benzene is less than the theoretical value.


Question : 6

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite

[A].   Has molecules of variable molecular masses like polymers.
[B].   Has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds.
[C].   Is a non-crystalline substance.
[D].   Is an allotropic form of carbon.


Question : 7

If n = 6, the correct sequence of filling of electrons will be

[A].   ns → np(n – 1)d → (n – 2)f
[B].   ns → n(n – 2)f → (n – 1)d → np
[C].   ns → (n – 1)d → (n – 2)f → np
[D].   ns → (n – 2)f → np → (n – 1)d


Question : 8

If the enthalpy change for the transition of liquid water to steam is 30 kJ mol–1 at 27°C, the entropy change for the process would be

[A].   100 J mol–1 K–1
[B].   10 J mol–1 K–1
[C].   1.0 J mol–1 K–1
[D].   0.1 J mol–1 K–1


Question : 9

If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas, then

[A].   ΔH > Δu
[B].   ΔH = Δu
[C].   ΔH < Δu
[D].   There is no relationship


Question : 10

Gram molecular volume of oxygen at STP is

[A].   11200 cm3
[B].   22400 cm3
[C].   5600 cm3
[D].   3200 cm3





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