NTPC CBT-2 Chemistry Quiz - 35

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Question 1:

Which is used in Dry Washing?

Question 2:

Which of the following is used as a refrigerant to preserve biological materials, food items and in cryosurgery?

Question 3:

Which one of the following metals does not react with oxygen, water or acids?

Question 4:

How many water molecules are present in one molecule of washing soda?

Question 5:

The oxide of Nitrogen used in medicine as anaesthetic is-