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. What do we call the number of water molecules present in one formula unit of a salt?

[A] Formula number of salt
[B] Power of the salt
[C] Water of crystallisation
[D] Hydro number

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62. Which of the following is the formula of cell constant?

[A] length/2 x Area
[B] length/Area
[C] 2 x length/Area
[D] length x Area

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63. 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

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64. Which of these alkanes has higher boiling point?

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

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65. Which of the following represents the mixture of carbon monoxide and nitrogen?

[A] Coal tar
[B] Producer gas
[C] Water gas
[D] All of the above

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66. Which of the following is a property of Alkanes?

[A] Alkanes are unreactive at normal conditions
[B] Alkanes are also known as Paraffins
[C] Both a and b
[D] None

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67. Which of the following alkene shows structural isomerism?

[A] Ethene
[B] Propene
[C] Butene
[D] All of the above

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68. Which of the following is an example of a Thermosetting plastic?

[A] Melamine
[B] Bakelite
[C] Formaldehyde resin
[D] Teflon

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69. What is the monomer unit of Teflon?

[A] Acetylene
[B] terafluoroethylene
[C] neoprene
[D] Propylene

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70. Which of the following polymer is obtained by the condensation reaction between ethylene glycol and terephthalic acid?

[A] Terelene
[B] PMMC
[C] PVC
[D] None of the above

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