Which of the following you should do in the laboratory while performing an experiment?
i. Pour acids and bases over a sink
ii. Wear goggles
iii. Heat a stoppered test tube

(a) (i) only
(b) (ii) only
(c) (iii) only
(d) (i and iii) only

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Solution

The correct answer is (b) (ii) only.

Both acids and bases can cause damage to drains, pipes, and tanks. Most of them are highly corrosive.

Heating a stoppered test tube can cause the boiling to be extremely sudden, forcing the liquid out of the tube, else vapours do not have space for coming out of the test tube. So, it can damage the test tube.

Wearing goggles while experimenting is essential to protect your eyes from splashing chemicals.

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