Chemistry Questions

Q:

Which of these is ATP?

A) 3 Phosphate groups attached to chromosome attached to Adenine B) 3 Phosphate groups attached to a Ribose attached to Adenine
C) 3 Phosphate groups attached to a Ribose attached to Thymine D) None of the above
 
Answer & Explanation Answer: B) 3 Phosphate groups attached to a Ribose attached to Adenine

Explanation:

ATP is a Adenosine Triphosphate.

 

ATP is 3 Phosphate groups attached to a Ribose attached to Adenine.

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Q:

The acid used in lead storage cells is

A) Sulphuric acid B) Nitric acid
C) Hydrochloric acid D) Phosphoric acid
 
Answer & Explanation Answer: A) Sulphuric acid

Explanation:

The acid used in lead storage cells is Sulphuric acid. They are used car batteries. Lead-acid batteries are capable of being recharged, which is important for their use in cars.

the_acid_used_in_lead_storage_cells_is1545132418.jpg image

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Q:

What occurs when an atom loses an electron?

A) The atom's radius decreases and the atom becomes a positive ion. B) The atom's radius increases and the atom becomes a negative ion.
C) The atom's radius decreases and the atom becomes a negative ion. D) The atom's radius increases and the atom becomes a positive ion.
 
Answer & Explanation Answer: A) The atom's radius decreases and the atom becomes a positive ion.

Explanation:

When an atom loses an electron it becomes a positive ion by acquiring negatively charged. When it loses electron, the atom's radius also decreased.

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Q:

Which gas is used for the preparation of Soda water?

A) Carbon Dioxide B) Oxygen
C) Hydrogen D) Ammonia
 
Answer & Explanation Answer: A) Carbon Dioxide

Explanation:
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Q:

What is the purpose of balancing chemical equations?

A) law of conservation of energy B) law of conservation of mass
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) law of conservation of mass

Explanation:

The main purpose of balancing chemical equations is to make the mass of reactants is equal to mass of products obtained after the reaction. Hence, to make law of conservation of mass is purpose of balancing chemica equations.

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Q:

Oxidation number of S8?

A) +1 B) -2
C) +2 D) 0
 
Answer & Explanation Answer: D) 0

Explanation:

S8 is an elemental form of sufur. In elemental form it can't be reduced or oxidized. Hence, it oxidation number is zero and thus sulfur is zerovalent here.

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Q:

Which one phosphorylates ADP to make ATP?

Answer

ATP synthase Phosphorylates ADP to make ATP.

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Q:

Which substance contains metallic bonds?

A) C6H12O6 B) Hg
C) H2O D) NaCl
 
Answer & Explanation Answer: B) Hg

Explanation:

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

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