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Q:

Name the reddish brown gas evolved when Lead Nitrate is heated strongly.

A) Nitric oxide B) Nitrogen di oxide
C) Di Nitrogen Oxide D) Nitrogen pentoxide
 
Answer & Explanation Answer: B) Nitrogen di oxide

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Q:

Which of the following statement is CORRECT?

A) Gold and Silver are not ductile. B) Phophorus and Nitrogen are ductile.
C) Copper and Platinum are ductile. D) Sulphur and Phophorus are sonorous
 
Answer & Explanation Answer: C) Copper and Platinum are ductile.

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Q:

What is the reaction between an acid and a base called?

A) Desalination B) Crystallisation
C) Neutralisation D) Sublimation
 
Answer & Explanation Answer: C) Neutralisation

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Q:

What is the ratio of masses of hydrogen and oxygen in the water?

A) 1 : 4 B) 1 : 8
C) 1 : 16 D) 1 : 64
 
Answer & Explanation Answer: B) 1 : 8

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Q:

Zeolite is

A) hydrated ferric oxide B)  hydrated sodium aluminium silicate
C)  sodium hexameta phosphate D)  sodium tetra borate
 
Answer & Explanation Answer: B)  hydrated sodium aluminium silicate

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Q:

Absolute Zero is defined as

A) The temperature at which all molecular motion ceases B) At which water boils at 298K
C) At which liquid Helium boils D) At which the volume becomes zero
 
Answer & Explanation Answer: A) The temperature at which all molecular motion ceases

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Q:

Release of which among the following is the primary reason for depletion of the ozone layer?

A) Nitrous oxide B) Hydrogen dioxide
C) Chlorofluro carbon D) Carbon monoxide
 
Answer & Explanation Answer: C) Chlorofluro carbon

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Q:

Haematite is an ore/mineral of

A) Zinc B) Iron
C) Lead D) Manganese
 
Answer & Explanation Answer: B) Iron

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