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1
Q:

Which of the following represents an ion?

A) a particle having 9 protons, 9 neutrons, and 10 electrons B) a particle having 19 protons, 21 neutrons, and 19 electrons
C) a particle having 14 protons, 14 neutrons, and 14 electrons D) a particle having 1 proton, 3 neutrons, and 1 electron

Answer:   A) a particle having 9 protons, 9 neutrons, and 10 electrons



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
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The percentage of nitrogen in the air is about

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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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