General Science Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination

61. Choose the correct statement about the compounds of carbon?

[A] Most carbon compounds are poor conductors of electricity
[B] Carbon forms covalent bonds
[C] Both a and b
[D] None

Show Answer

62. What percentage of Human body is made up of carbon?

[A] 12
[B] 18.5
[C] 28.8
[D] 44.2

Show Answer

63. Which of the following carbon compound is used as liquid rocket fuel?

[A] Carbon Tetrachloride
[B] Methane
[C] Propane
[D] All of Above

Show Answer

64. Which of the following is / are correct statements with respect to Graphite?

  1. It is the most stable phase of carbon at normal conditions
  2. It is made of made of sp3 hybridized carbon atoms
  3. It is good conductor of both heat and electricity

Select the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

Show Answer

65. What is the general formula for alkyl groups?

[A] CnH2n+2
[B] CnH2n
[C] CnH2n-1
[D] CnH2n+1

Show Answer

66. Ethanoic acid is the main constituent of which of the following substances?

[A] Soap
[B] Vinegar
[C] Wine
[D] Curd

Show Answer

67. What is the common name of But-2-yne?

[A] Acetylene
[B] Methylacetylene
[C] Ethylacetylene
[D] Dimethylacetylene

Show Answer

68. Which gas is produced when Sodium ethanoate is heated with Soda lime?

[A] Methane
[B] Ethane
[C] Acetylene
[D] Ethene

Show Answer

69. Which of these alkanes has higher boiling point?

[A] Butane
[B] Methane
[C] Ethane
[D] Hexane

Show Answer

70. What is the octane number of iso-octane?

[A] 1
[B] 0
[C] 100
[D] 200

Show Answer

Advertisement [contact-form-7 id="141158" title="Contact form 1"]