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Q:

Magnesium oxide (MgO) + Water (H2O) = ?

A) [Mg(OH)] B) [Mg(O2H)2]
C) [Mg2(OH)] D) [Mg(OH)2]
 
Answer & Explanation Answer: D) [Mg(OH)2]

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Q:

What are isobars?

A) Elements with same atomic number but different mass number B) Elements with different atomic number but same mass number
C) Elements with different atomic number and different mass number D) Elements with same atomic number and same mass number
 
Answer & Explanation Answer: B) Elements with different atomic number but same mass number

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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:

Which of the following are highly compressible?

A) Solid B) Liquid
C) Gas D) Solid and Liquid
 
Answer & Explanation Answer: C) Gas

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Q:

Limestone is a raw material used by which industry?

A) Aluminium B) Fertilizers
C) Cement D) Petrochemicals
 
Answer & Explanation Answer: C) Cement

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Q:

The most abundant element in the earth's atmosphere is

A) Argon B) Nitrogen
C) Oxygen D) Krypton
 
Answer & Explanation Answer: B) Nitrogen

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Q:

____ is not an allotrope of carbon.

A) Buckminsterfullerene B) Carbon Dioxide
C) Diamond D) Graphite
 
Answer & Explanation Answer: B) Carbon Dioxide

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Q:

Blotting paper absorbs ink due to

A) Coarse nature of paper B) Osmosis
C) Capillary action D) Siphoning
 
Answer & Explanation Answer: C) Capillary action

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