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NAVY || PERIODIC TABLE

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Question 1

Which of the following is an Inert Gas?

Question 2

A balloon filled with helium gas rises up. Give reason.

Question 3

Which of the following process is used to extract silver from argentiferous lead?

Question 4

Atomic Number of an element is 49. It belongs to-

Question 5

How many elements are present in 6th period?
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NDA
Nov 8NDA