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8
Q:

Ozone hole refers to

A) Decrease in the thickness of ozone layer in Stratosphere B) Increase in thickness of ozone layer
C) Decrease in the ozone layer in Troposphere D) Hole in the ozone layer

Answer:   A) Decrease in the thickness of ozone layer in Stratosphere



Explanation:
Subject: Chemistry
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Answer & Explanation Answer: D) No option is correct

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Which of the following group is NOT Dobereiner Triads?

 

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Answer & Explanation Answer: B) N, P Au

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Safety matches contain

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Answer & Explanation Answer: B) Phosphorus

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Air ___________________ are the substances which contaminate the air.

A) Reactants B) Irritants
C) Resistants D) Pollutants
 
Answer & Explanation Answer: D) Pollutants

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By using which foam the Researchers from Indian Institute of Technology – Bombay have made a low cost piezo resistive vibration sensor?

A) Only Polyurethane B) Only Polyethylene
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Answer & Explanation Answer: B) Only Polyethylene

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Which of the following is NOT a compound?

 

A) Ammonia B) Milk
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Answer & Explanation Answer: B) Milk

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