Question

While heating a liquid in a test tube, the mouth of the test tube should be:

• A. Away from you
• B. Towards you
• C. In the sink
• D. Towards your neighbour

Answer 1

The correct option is A

Away from you

Explanation for the correct option:

• Option A
• Test tube is a small tube made of glass.
• It is used to heat small quantities of liquids or mix different liquids.
• While heating liquids in a test tube, we should always keep the mouth of the test tube away from the face.
• Chemical substances are more harmful during the heating, if we do not follow the safety rules then we can meet with some accidents.

Therefore option A is correct.

Explanation for the incorrect option:

• We should keep our faces away from the test tubes during the heating process.
• It can be harmful if we keep the test tube during the heating chemical substance near our face or towards another one.

Therefore options B, C, and D are incorrect.