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Q:

Propyne and propene can be distinguished by

A) AgNO₃ in ammonia B) conc. H₂SO₄
C) dil. KMnO₄ D) Br₂ in CCl₄
 
Answer & Explanation Answer: A) AgNO₃ in ammonia

Explanation:

Propene, being an alkene, and propyne, being a alkyne, are distinguished using the common chemical tests namely ammoniacal silver nitrate or ammoniacal cuprous chloride. Ammoniacal silver nitrate is also called as Tollen's reagent.

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Q:

What is the chemical formula of Ozone?

A) O B) O2
C) O3 D) O4
 
Answer & Explanation Answer: C) O3

Explanation:
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Q:

Aqueous solution of copper sulphate?

A) does not affects litmus B) affects both red and blue litmus
C) turns blue litmus red D) turns red litmus blue
 
Answer & Explanation Answer: C) turns blue litmus red

Explanation:
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Q:

Which of the following metals is a liquid at room temperature?

A) Lithium B) Mercury
C) Sodium D) Calcium
 
Answer & Explanation Answer: C) Sodium

Explanation:
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Q:

Matter is classified as a

A) pure substance B) mixture
C) both 1 & 2 D) none of the above
 
Answer & Explanation Answer: C) both 1 & 2

Explanation:
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Q:

Which one of the following is not a borderline element?

A) Boron B) Silicon
C) Polonium D) Bismuth
 
Answer & Explanation Answer: D) Bismuth

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Q:

In the following gases, which is not a colorless or odourless gas?

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

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Q:

Aluminium oxide is ___ in nature.

A) amphoteric B) acidic 
C) neutral D) basic
 
Answer & Explanation Answer: A) amphoteric

Explanation:
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