Graphite is used in nuclear reactors ?

C. For reducing the velocity of neutrons

D. For absorbing gamma radiation

Everyday Science · Atoms, Elements & Compounds · page 8 of 8

Non-metal Elements MCQs with Answers

Includes 8 past paper MCQs (marked).

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8 MCQs with answers and a short one-liner. Hide answers to test yourself.

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71.
Non-metals of group are gases.
Correct Answer: A. VIII-A
One-liner
Non-metals of VIII-A group (Noble gases) are gases.
72.
Which of the following is not a rare gas?
Correct Answer: C. Ozone
One-liner
Ozone is not a rare gas; it is an allotrope of oxygen (O₃), whereas helium, neon, and argon are all noble (rare) gases.
73.
What is the primary use of graphite?
Correct Answer: B. Lubricant
One-liner
The primary use of graphite is as a lubricant.
74.
The element which is used in the preparation of matches due to their rapid burning property is _?
Correct Answer: B. Phosphorus
One-liner
The element used in the preparation of matches due to its rapid burning property is Phosphorus.
75.
Graphite is used in nuclear reactors ?
Correct Answer: C. For reducing the velocity of neutrons
One-liner
Graphite is used in nuclear reactors for reducing the velocity of neutrons (as a moderator).
76.
Past Paper MCQ
Noble gases bonding:
Correct Answer: C. No bonding
One-liner
Noble gases exhibit no bonding because they have a complete valence electron shell, making them chemically inert.
77.
Which gas is chemically inert?
Correct Answer: B. N₂
One-liner
Nitrogen gas (N₂) is chemically inert due to the strong triple bond between its two nitrogen atoms.
78.
Which of the following is mono-atomic?
Correct Answer: C. Neon
One-liner
Neon is mono-atomic because it exists as single, unbonded atoms rather than diatomic molecules.