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 Chemistry Questions

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Q:

What enables an electric current to flow in a circuit?

 

A) The motion of electrons B) The motion of neutrons
C) The motion of positrons D) The motion of protons
 
Answer & Explanation Answer: A) The motion of electrons

Explanation:
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Q:

Which is released during the formation of a peptide bond?

 

 

A) an amino group B) a five-carbon sugar
C) both 1 and 2 D) a water molecule
 
Answer & Explanation Answer: D) a water molecule

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Q:

In which of the following, functional group isomerism is not possible?

 

A) Alcohols B) Aldehydes
C) Alkyl halides D) Cyanides
 
Answer & Explanation Answer: C) Alkyl halides

Explanation:

The haloalkanes (also known as halogenoalkanes or alkyl halides) are a group of chemical compounds derived from alkanes containing one or more halogens.Halogens can’t form more than one bond in the context of common organic compounds and can’t form multiple bonds to carbon.

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Q:

The most abundant of the rare gases i ?

 

A) Helium B) Argon
C) Neon D) Nitrogen
 
Answer & Explanation Answer: B) Argon

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Q:

Baking soda is used ______.

 

I. for making baking powder

II. in soda-acid fire extinguishers

III. to neutralize excess acid in the stomach

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

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Q:

Which of the following is a non metal that remains liquid at room temperature  ?

A) Chlorine B) Phosphorous
C) Bromine D) Helium
 
Answer & Explanation Answer: C) Bromine

Explanation:

The chemical element with the atomic number 35, Bromine is a non metal that remains liquid at room temperature. Mercury also remains liquid at room temperature but it is a metal. Bromine is the third lightest halogen.

 

Which_of_the_following_is_a_non_metal_that_remains_liquid_at_room_temperature1542256555.jpg image

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180 38677
Q:

Consider the following constituent gases of the atmosphere :

1. Argon

2. Neon

3. Helium

4.Ceirbon dioxide

Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?

A) 1-3-2-4 B) 1-4-2-3
C) 4-2-3-1 D) 2-4-1-3
 
Answer & Explanation Answer: B) 1-4-2-3

Explanation:
Composition of Dry Air (Substance, % by volume)
Nitrogen, N2 78.08
Oxygen, O2
20.95
Argon, Ar 0.93
Carbon dioxide, CO2 0.033
Neon, Ne 0.0018
Helium, He 0.00052
Methane, CH4 0.0002
Krypton, Kr 0.00011
Dinitrogen oxide, N2O 0.00005
Hydrogen, H2 0.00005
Ozone, O3 0.000001
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Q:

Water which is suitable for drinking is called _______________ water.

 

A) hygienic B) sparkling
C) potable D) sanitary
 
Answer & Explanation Answer: C) potable

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