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 Chemistry Questions

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Q:

Which among the following has the maximum density?

A) Water B) Ice
C) Ethylene D) Acetone
 
Answer & Explanation Answer: A) Water

Explanation:
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Q:

What types of atoms form covalent bonds?

A) metal and metal B) metal and non metal
C) non metal and non metal D) All of the above
 
Answer & Explanation Answer: C) non metal and non metal

Explanation:

Covalent bonds are bonds formed between two non metals by sharing of electrons in their outer most orbits for stable.

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Q:

Which metal is responsible for Itai-Itai disease?

A) Cadmium B) Nickel
C) Chromium D) Mercury
 
Answer & Explanation Answer: A) Cadmium

Explanation:
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Q:

The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its ___________.

A) Crystallisation B) Melting point
C) Evaporation D) Galvanisation
 
Answer & Explanation Answer: B) Melting point

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Q:

Isotopes are atoms of the same element that have different

A) mass numbers B) atomic numbers
C) protons D) All of the above
 
Answer & Explanation Answer: A) mass numbers

Explanation:

Isotopes are atoms of the same element that have different mass numbers.

Example : Hydrogen, Deutirium and tritium all these have different mass but same atomic numbers.

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Q:

What two elements are used to make bronze?

A) Lead and copper B) copper and tin
C) Tin and lead D) copper and iron
 
Answer & Explanation Answer: C) Tin and lead

Explanation:

The two elements that are used to make bronze are tin and lead.

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Q:

Hydrogenation process is associated with which of the following?

A) Rubber B) Petroleum
C) Copper D) Edible fats
 
Answer & Explanation Answer: D) Edible fats

Explanation:
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Q:

The principal quantum number indicates what property of an electron?

A) energy of electron B) distance of electron from nucleus
C) both a & b D) number of subshells
 
Answer & Explanation Answer: C) both a & b

Explanation:

The principal quantum number is the property of an electron which determines the energy of electron and the distance of electron from the nucleus of an atom.

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