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. Which of the following sub-atomic particle accompanies an electron emission in Betadecay?

[A] antineutrino
[B] neutrino
[C] proton
[D] None of the above

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62. What is the multiplication factor when the nuclear reactor is said to be critical?

[A] 0
[B] 1
[C] 2
[D] 10

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63. Which of the following represents the reaction of Calcium oxide and water to form Slaked lime?

[A] Displacement reaction
[B] Combination reaction
[C] Double Displacement reaction
[D] None

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64. Which of the following reactions take place when iron nail in a copper sulphate solution becomes brownish in colour?

[A] Decomposition reaction
[B] Displacement reaction
[C] Double Displacement reaction
[D] None of the above

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65. Which of the following equation represents combination of Hydrogen gas with nitrogen to form ammonia?

[A] 2H2 + N –> NH3
[B] 2H + N3 –> NH3
[C] 3H2 + N2 –> 2NH3
[D] None of the above

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66. What is the sum of powers of the concentration of the reactants called as?

[A] Order of reaction
[B] Stage of reaction
[C] Zone of reaction
[D] None of the above

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67. What is the order of the reaction which is independent of the concentration of reactants?

[A] Zero order
[B] First order
[C] Second order
[D] Third order

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68. What happens to the effective nuclear charge as we move from left to right in the periodic table?

[A] It increases
[B] it decreases
[C] It remains constant
[D] It increases till 4th group then decreases

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69. What is the general trend for electronegativity in a group of the periodic table as we move from top to bottom?

[A] It increases
[B] It decreases
[C] It remains constant
[D] None

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70. In which of the following groups is Gold placed in the modern periodic table?

[A] 10
[B] 12
[C] 11
[D] 9

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