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Q.

Which is the proper way to heat a liquid in a test tube?

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a

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b

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c

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d

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answer is D.

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Detailed Solution

Always direct the test tube away from any lab coworkers. Heat the test tube while it is being held at an angle so that the gases created may safely escape. Instead of heating the test tube at the bottom, where a gas bubble may explode.

Hence tube position in option D is correct

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