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Which technique is recommended for determining he odour of an unknown liquid in the laboratory?

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Use a medicine dropper to collect a small quantity of the vapour and squirt this under the nose while inhaling.

Hold a test tube of the liquid under the nose and inhale the vapour.

Transfer a few drops of the liquid to the desk top and inhale the vapour from there.

Use a medicine dropper to collect a small quantity of the vapour and squirt this under the nose while inhaling

answer is D.

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Detailed Solution

It is advised to inhale some of the test tube's vapor with your hand to determine an unknown liquid's odour in a laboratory setting.

Hence correct option is D

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