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 Chemistry Questions

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Q:

Which of the following metals is a liquid at room temperature?

A) Lithium B) Mercury
C) Sodium D) Calcium
 
Answer & Explanation Answer: C) Sodium

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Q:

Which of the following gases is used to prevent food material from getting oxidised?

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

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Q:

Choose the one which is different or odd from the following.

A) Aluminium B) Iron
C) Copper D) Brass
 
Answer & Explanation Answer: D) Brass

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Q:

Which of the following elements has a total of 3 shells with 8 electrons in the last orbit?

A) Ar B) P
C) S D) Al
 
Answer & Explanation Answer: A) Ar

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Q:

Common salt (NaCl) is made up of

A) a weak acid and a weak base B) a strong acid and a weak base
C) a weak acid and a strong base D) a strong acid and a strong base
 
Answer & Explanation Answer: D) a strong acid and a strong base

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Q:

What is the action of dry HCl gas on dry litmus paper?

A) Blue litmus paper turns white B) Blue or red litmus paper does not change its colour
C) Blue litmus paper turns red D) Red litmus paper turns blue
 
Answer & Explanation Answer: B) Blue or red litmus paper does not change its colour

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Q:

In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:

A) 8:1 B) 7:1
C) 1:7 D) 1:8
 
Answer & Explanation Answer: D) 1:8

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Q:

Which of the following is not a greenhouse gas?

A) Carbon dioxide B) Methane
C) Chlorofluorocarbons D) Oxygen
 
Answer & Explanation Answer: D) Oxygen

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