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Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases

Answer:   D)  size and ionisation energy of an atom increases



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Subject: Chemistry
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The vast amount of sea weeds present in oceans may produce an endless source of

 

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Which is not a green house gas in the following?

 

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Answer & Explanation Answer: D) Hydrogen

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

A) Nitrogen B) Chlorine
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Answer & Explanation Answer: B) Chlorine

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Which of the following is called Aurum?

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Answer & Explanation Answer: B) Gold

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Which of the following gases are responsible for the greenhouse gas effect on Earth?

A) Water Vapour and Carbon dioxide B) Carbon dioxide and Nitrogen
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Answer & Explanation Answer: A) Water Vapour and Carbon dioxide

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