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 Chemistry Questions

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Q:

The upper part of the heterosphere is composed almost completely of which gas?

A) Ozone B) Nitrogen
C) Oxygen D) Hydrogen
 
Answer & Explanation Answer: D) Hydrogen

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Q:

Which of the following is a chemical formula of quicklime?

A) Ca2O B) Ca2CO3
C) CaO2 D) CaO
 
Answer & Explanation Answer: D) CaO

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Q:

pH of the human blood is ______.

A) Slightly Acidic B) Highly Acidic
C) Slightly Basic D) Highly Basic
 
Answer & Explanation Answer: C) Slightly Basic

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Q:

What is the natural source of Oxalic acid?

A) Tomato B) Sour milk
C) Ant sting D) Tamarind
 
Answer & Explanation Answer: A) Tomato

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Q:

Which of the following elements is used for vulcanizing rubber?

A) Sulphur B) Chlorine
C) Bromine D) Phosphorus
 
Answer & Explanation Answer: A) Sulphur

Explanation:

Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur rubber much stronger, more flexible, and more resistant to heat and other environmental conditions.

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Q:

In the following reaction, fill in the blank.
Acid + Base → _______ + Water

A) Carbon dioxide B) Metal Oxide
C) Hydrogen Gas D) Salt
 
Answer & Explanation Answer: D) Salt

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Q:

Nylon threads are made of

A) Polyester polymer B) Polyamide polymer
C) Polyvinyl polymer D) Polysaccharide
 
Answer & Explanation Answer: B) Polyamide polymer

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Q:

Which of the following is not soluble in water?

A) Lead sulphate B) Zinc sulphate
C) Potassium sulphate D) Sodium sulphate
 
Answer & Explanation Answer: A) Lead sulphate

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