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What is the proper technique to test the...

What is the proper technique to test the odour of a vapour in a test tube?

A

Hold the test tube near the nose and sniff

B

Use a micropipet to capture some of the gas and sniff that

C

Hold the test tube above the nose and pour the gas towards it

D

Hold the test tube near the nose and waff the gas towards it with a hand

Text Solution

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The correct Answer is:
D
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