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 Chemistry Questions

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Q:

What are the Monomers that make up Proteins?

A) Amino acids B) Nucleotides
C) Disaccharides D) Chaperones
 
Answer & Explanation Answer: A) Amino acids

Explanation:

Proteins are long chains of Amino acids. That is in brief, Amino acids are the monomers of Proteins. Amino acids are compounds which contain both an amino group and a carboxylic group. Proteins are made up of 20 essential amino acids.

Monomer means a small molecule of an organic substance i.e, building block in general.

 

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Q:

Isotopes of the atoms of same element have

A) same number of neutrons B) same number of protons
C) same atomic mass D) different chemical properties
 
Answer & Explanation Answer: B) same number of protons

Explanation:
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Q:

The soaps used in shaving cream are 

A) Calcium soaps B) lead soaps
C) soft soaps D) hard soaps
 
Answer & Explanation Answer: C) soft soaps

Explanation:
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Q:

Carbon dioxide is one of the gases that cause the _________.

 

A) greenhouse effect   B) ozonification  
C) oven phenomenon   D) sunburn  
 
Answer & Explanation Answer: A) greenhouse effect  

Explanation:
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Q:

The most electronegative element among the following is

A) Oxygen B) Chlorine
C) Nitrogen D) Sodium
 
Answer & Explanation Answer: A) Oxygen

Explanation:

Electronegativity measures an element's ability to form chemical bonds. Helium is the most electronegative element followed by Fluorine.

 

Here in the given options, Oxygen is the most electronegative element. Fluorine is followed by Oxygen, Chlorine and Nitrogen is the most electronegative elements list.

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Q:

Generally covalently bonded molecules ______.

 

I. have high boiling and melting point as compare to ionically bonded molecules

II. poor conductors of electricity

III. have weak intermolecular force

 

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

Explanation:
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Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases
 
Answer & Explanation Answer: D)  size and ionisation energy of an atom increases

Explanation:
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Q:

PAS is a drug used in the treatment of

A) Cancer B) Typhoid
C) Malaria D) Tuberculosis
 
Answer & Explanation Answer: D) Tuberculosis

Explanation:

Para-amino salicylic acid (PAS) is used in the treatment of Tuberculosis.

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