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 Chemistry Questions

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Q:

When a chemical bond is broken energy is

A) transferred B) released
C) used D) None of the above
 
Answer & Explanation Answer: C) used

Explanation:

Bond breaking is an endothermic process.

Hence, bond breakage needs an amount of energy and uses some energy based on the strength of the bond to break the bond.

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Q:

Process of gaining electrons is known as _____.

A) oxidation B) reduction
C) radiation D) both oxidation and reduction
 
Answer & Explanation Answer: B) reduction

Explanation:
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Q:

The common name of sodium bicarbonate is _____.

A) baking soda B) borax
C) bleach D) epsom salt
 
Answer & Explanation Answer: A) baking soda

Explanation:
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Q:

Which among the following is used in making liquors, medicines and as a fuel in aircrafts?

A) Propyl alcohol B) Dimethyl alcohol
C) Ethyl alcohol D) Methyl alcohol
 
Answer & Explanation Answer: C) Ethyl alcohol

Explanation:
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Q:

Liquid sodium is being considered as

A) engine coolant B) bleaching agent
C) antiseptic D) None of the above
 
Answer & Explanation Answer: A) engine coolant

Explanation:

Liquid sodium is being considered as engine coolant.

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Q:

Which of the following is not a strong acid?

A) H2SO4 B) CH3COOH
C) HCl D) HBr
 
Answer & Explanation Answer: B) CH3COOH

Explanation:

CH3COOH, chemically known as Acetic acid, is not a strong acid among the given acids like Sulphuric acid, Hydrochloric acid,...

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Q:

Which of the following equals one atomic mass unit?

A) one-twelfth the mass of one carbon-12 atom B) the mass of one electron
C) one-sixth the mass of one helium-4 atom D) the mass of one carbon-12 atom
 
Answer & Explanation Answer: A) one-twelfth the mass of one carbon-12 atom

Explanation:

One atomic mass unit (AMU) is equal to the one-twelfth the mass of one carbon-12 atom.

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Q:

What is the common characteristic of the elements of the same group in the periodic table?

A) Electrons in outer most shell B) Total number of electrons
C) Total number of protons D) Atomic weight
 
Answer & Explanation Answer: A) Electrons in outer most shell

Explanation:
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