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

91. Why a milkman adds a very small amount of baking soda to fresh milk?

[A] To decrease its pH slightly
[B] To increase its pH slightly
[C] To kill the bacteria in Fresh Milk
[D] To turn its color from slight pale to white

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92. Which of the following is / are products of the electrolysis of brine solution?

  1. Hydrogen
  2. Chlorine
  3. Sodium hydroxide

Select the correct option from the codes given below:

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

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93. Which does the gas turn lime water milky?

[A] Oxygen
[B] Hydrogen
[C] Carbon Dioxide
[D] Carbon Monoxide

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94. Which of the following salt is main components of the common black snake firework?

[A] Washing Soda
[B] Baking Soda
[C] Soda Lime
[D] Caustic Soda

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95. Which of the following acids is used in the lead storage cells?

[A] Hydrochloric Acid
[B] Sulphuric Acid
[C] Nitric Acid
[D] Phosphoric Acid

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96. Which of the following is the purest form of iron?

[A] Steel
[B] Cast Iron
[C] Pig Iron
[D] Wrought Iron

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97. Which of the following metals form an amalgam with other metals?

[A] Lead
[B] Tin
[C] Zinc
[D] Mercury

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98. Which particle is the most essential component to continue the chain reaction during the uranium fission?

[A] Electron
[B] Proton
[C] Neutron
[D] Positron

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99. Which one amongst the following is not a GreenHouse gas?

[A] Nitrogen
[B] Carbon dioxide
[C] Carbon Monoxide
[D] Chloro fluorocarbons

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Which among the following is a crystalline form of Quartz?

[A] Alumina
[B] Glass
[C] Silica
[D] Limestone

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