general science questions

26.

The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
A.     bromine    B.     fluorine
C.     chlorine    D.     sulphur
Answer & Explanation

Answer: Option D

Explanation:

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27.

The element common to all acids is
A.     hydrogen    B.     carbon
C.     sulphur    D.     oxygen
Answer & Explanation

Answer: Option A

Explanation:

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28.

Non stick cooking utensils are coated with
A.     Teflon
B.     PVC
C.     black paint
D.     polystyrene
Answer & Explanation

Answer: Option A

Explanation:

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29.

Monazite is an ore of
A.     titanium    B.     zirconium
C.     iron    D.     thorium
Answer & Explanation

Answer: Option D

Explanation:

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30.

Carbon, diamond and graphite are together called
A.     allotropes    B.     isomers
C.     isomorphs    D.     isotopes
Answer & Explanation

Answer: Option A

Explanation:

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