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. What is the common characteristic of the elements of the same group in the periodic table?

[A] Total number of electrons
[B] Total number of protons
[C] Electrons in outer most shell
[D] Atomic weight

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92. Who discovered that water is composed of two parts hydrogen and one part oxygen by volume?

[A] Pierre Robiquet
[B] Joseph Louis Gay-Lussac
[C] Henri-Victor Regnault
[D] Georges Urbain

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93. Which of the following was the first fundamental particle to be discovered?

[A] Electron
[B] Muon
[C] Neutron
[D] Neutrino

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94. Who was the first person to devise a periodic table of chemical elements arranged in order of their relative atomic masses?

[A] Dmitri Mendeleev
[B] John Dalton
[C] John Alexander Reina Newlands
[D] Johann Wolfgang Dobereiner

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95. Tartaric acid is used along with baking soda in baking breads and cakes. What is the use of Tartaric Acid in this process?

[A] It makes the bread / cake soft and fluffy
[B] It stops making of lumps in bread / cake
[C] It neutralizes the bitterness in bread / cake
[D] It gives sweet aroma in the bread / cake

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96. Tap water conducts electricity, whereas distilled water does not. This is because in comparison to distilled water, tap water has __?

[A] polarity
[B] impurity
[C] covalence
[D] surface charge

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97. Which gas is called the “firedamp” in coal mines?

[A] Hydrogen
[B] Carbon monoxide
[C] Air
[D] Methane

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98. “Petroleum” can be categorised under which one of the following terms?

[A] Elements
[B] Hydrocarbons
[C] Polymers
[D] Salts

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99. Which of the following gases helps in bread/cake fermentation so as to make it soft and spongy?

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

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100. What is the purpose of adding baking soda to the dough?

[A] To generate moisture
[B] To give a good flavour
[C] To give a good colour
[D] To generate carbon dioxide

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