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Q:

Which of the following elements has the lowest melting point?

A) Bromine B) Zinc
C) Lead D) Calcium
 
Answer & Explanation Answer: A) Bromine

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Q:

What is dry ice?

A) Solid Carbon dioxide B) Solid Nitrogen dioxide
C) Solid Sulphur dioxide D) Solid Water
 
Answer & Explanation Answer: A) Solid Carbon dioxide

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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:

____ 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:

NaCl has ______.

A) nonpolar bonds B) polar covalent bonds
C) Metallic bonds D) ionic bonds
 
Answer & Explanation Answer: D) ionic bonds

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Q:

What happens in an oxidation reaction?

A) Protons are lost. B) Electrons are lost
C) Neutrons are lost. D) Electrons are gained.
 
Answer & Explanation Answer: B) Electrons are lost

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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:

Which of the following is a natural polymer?

A) Bakelite B) Nylon
C) Polythene D) Starch
 
Answer & Explanation Answer: D) Starch

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