The setting of cement is an: MCQ with Answer and Explanation

The setting of cement is an:
A. Exothermic process
B. Endothermic process
C. Evaporation process
D. Oxidation process
Answer: Option A
Solution (By JKExamLibrary)
Hydration of cement is exothermic (heat of hydration). In large concrete pours, this heat can cause thermal cracking. Cooling is sometimes needed.

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Practice More chemistry Questions

Question #1
Which of the following gases contributes to the greenhouse effect?
A. Hydrogen
B. Carbon dioxide
C. Oxygen
D. Nitrogen

Correct Answer: Option B


Explanation:
CO₂ is a major greenhouse gas that absorbs infrared radiation and re-emits it, warming the atmosphere. Other GHGs: CH₄, N₂O, water vapor, CFCs. N₂ and O₂ are diatomic homonuclear molecules that do not absorb IR and are not GHGs. Hydrogen is not a GHG. The increase in CO₂ due to human activities is driving climate change.

This question belongs to: Science chemistry
Question #2
Which acid is called the 'King of Chemicals'?
A. Sulphuric acid
B. Phosphoric acid
C. Hydrochloric acid
D. Nitric acid

Correct Answer: Option A


Explanation:
Sulphuric acid is used in the production of fertilizers, chemicals, petroleum refining, etc., earning the title. It's not the strongest acid but the most industrially important.

This question belongs to: Science chemistry
Question #3
The process of depositing a thin layer of a metal on an object using electricity is called:
A. Electrolysis
B. Electroplating
C. Electrorefining
D. Electrometallurgy

Correct Answer: Option B


Explanation:
Electroplating is the application of electrolytic cells to deposit a thin, protective, or decorative layer of a metal (like gold, silver, or chromium) onto a conductive object. Electrolysis is the general process of using electricity to drive a non-spontaneous chemical reaction.

This question belongs to: Science chemistry