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1
Q:

Which of the following elements has a total of 3 shells with 8 electrons in the last orbit?

A) Ar B) P
C) S D) Al

Answer:   A) Ar



Explanation:
Subject: Chemistry
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The percentage of nitrogen in the air is about

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Answer & Explanation Answer: C) 78%

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Methane contributes towards global warming so it is called a _________________ gas.

 

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Which of the following is a metal?

 

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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?

 

A) Li, Na, K B) N, P Au
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Answer & Explanation Answer: B) N, P Au

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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
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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?

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Which of the following is NOT a compound?

 

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Answer & Explanation Answer: B) Milk

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