General Knowledge Question Answer: Chemistry GK Questions and Answers

General Knowledge Chemistry Questions, Chemistry Quiz for Competitive Exams, Important Chemistry MCQs for GK

Q. Which one of the following metals is kept immersed in Kerosene oil to protect it and to prevent accidental fire?
1) Calcium
2) Sodium
3) Vanadium
4) Magnesium

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Q. Which one of the following substances do silver articles react with, that makes the silver articles black?
1) Sulphur
2) Oxygen
3) Carbon dioxide
4) Phosphorus

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Q. When we heat lead nitrate [Pb(NO3)2] in a boiling tube, we observe the emission of brown fumes. Which one of the follow-ing is the brown gas?
1) NO
2) N2O2
3) NO3
4) NO2

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Q. Which of the following cannot be separated from air by the process of fractional distillation?
1) Oxygen
2) Argon
3) Hydrogen
4) Nitrogen

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Q. Which chemical law proposes that soft drinks and soda bottles are sealed under high pressure to increase the solubility of CO2?
1) Raoult's law
2) Henry's law
3) Ohm's law
4) Dalton's law

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Q. Which one of the following can be categorised as a solution?
1) Diamond
2) Sea Water
3) Salt
4) Coal

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Q. Which of the following is/ are used of Biogas?
I. Fuel for cooking food
II. Used for lighting
III. As a fuel to run engines
IV. Used for generating electricity
Correct code is -

1) Only I
2) Only I and II
3) Only I, II and IV
4) I, II, III and IV all

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Q. Calcium sulphate dihydrate is commonly known as -
1) Gypsum
2) Glass
3) Asbestos
4) Limestone

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Q. Which one of the following is the major constituent of biogas?
1) Carbon dioxide
2) Nitrous oxide
3) Methane
4) Oxygen

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Q. Which one of the following represents the correct order of electron releasing tendency of metals?
1) Zn>Cu>Ag
2) Ag>Cu>Zn
3) Cu>Zn>Ag
4) Cu>Ag>Zn

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