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 Chemistry Questions

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Q:

Which of the following is NOT a compound?

 

A) Ammonia B) Milk
C) Sodiumchloride D) Chalk
 
Answer & Explanation Answer: B) Milk

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Q:

The purest form of iron is 

A) wrought iron B) steel
C) pig iron D) nickel steel
 
Answer & Explanation Answer: A) wrought iron

Explanation:

Wrought Iron is the purest form of iron. It contains 0.12 to 0.25% carbon and so it is the purest form of iron.

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Q:

Which among the following noble gas has highest molar mass?

 

A) Kr   B)  Ne  
C)  Ar   D)  Xe
 
Answer & Explanation Answer: D)  Xe

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Q:

Which subatomic particle has a negative charge?

 

A) Neutron B) Proton
C) Ion D) Electron
 
Answer & Explanation Answer: D) Electron

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Q:

SnCl2 + 2HgCl2 ---> Hg2Cl2 + SnCl4

 

In the given reaction

 

A) HgCl2 is oxidised B) SnCl2 is oxidised
C) Hg2Cl2 is oxidised D) SnCl2 is reduced
 
Answer & Explanation Answer: B) SnCl2 is oxidised

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Q:

Dissolving is best described as

 

A) molecules breaking into ions B) a change from a solid to a liquid
C) breaking covalent bonds D) a mingling of molecules and/or ions
 
Answer & Explanation Answer: D) a mingling of molecules and/or ions

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Q:

Which of the following is a metal?

 

A) Sulphur B) Nitrogen
C) Oxygen D) No option is correct
 
Answer & Explanation Answer: D) No option is correct

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Q:

Which of the statement(s) about the reaction given below is/are INCORRECT?

 

2PbO (s) + C (s) ⟶ 2Pb (s) + CO2 (g)

 

I. Lead is getting reduced.

II. Carbon is getting reduced.

III. Lead oxide is getting reduced.

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: A) Only I and II

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