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

71. Which of these species will have the largest atomic size?

[A] Na
[B] Mg
[C] Mg2+
[D] K

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72. Which of the following molecules have a T-shape arrangement?

[A] Ozone
[B] Water
[C] Chlorine Trifluoride
[D] Sulphur dioxide

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73. What do we call the covalent bond where the electrons of the shared pair are contributed by only one species?

[A] Polar Covalent bonds
[B] Coordination Covalent bonds
[C] Unilateral Covalent bonds
[D] None of the above

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74. Choose the correct statement:

[A] Water exists as liquid due to hydrogen bonding
[B] Hydrogen bond is a weak bond as compared to ionic bond
[C] Both a and b
[D] None of the above

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75. What is the bond angle in case of Ammonia molecule?

[A] 120°
[B] 150°
[C] 66°
[D] 107°

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76. Which of the following represents the bond order in Molecular orbital theory?

[A] half the difference between the number of bonding and antibonding electrons
[B] twice the difference between the number of bonding and antibonding electrons
[C] the difference between the number of bonding and antibonding electrons
[D] the sum of the number of bonding and antibonding electrons

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77. What is the relationship between bond energy and bond length?

[A] Bond energy is independent of bond length
[B] Bond energy increases with the increase of bond length
[C] Bond energy decreases with the increase of bond length
[D] None of the above

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78. What is the shape of SF4 molecule?

[A] Bent
[B] See-saw
[C] Trigonol Pyramidal
[D] T-shape

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79. What is the PH of human blood?

[A] 8.2
[B] 7.4
[C] 6.5
[D] 7

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80. What do we call the device which converts the chemical energy of a spontaneous redox reaction into electrical energy?

[A] Galvanic cell
[B] Fuel cell
[C] Electrolytic cell
[D] None of the above

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