Multiple choice

Which of the following is/are the precautions to be observed while reading laboratory thermometer?

  1. The thermometer should be kept upright either by freely suspending it or by fixing it in cork, etc.

  2. The bulb of the thermometer should be completely surrounded by the liquid.

  3. The bulb of the thermometer should not touch the sides or the base of the container.

  4. The reading should be taken only when the level of the mercury is steady for 30 seconds or more.

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option, as all of the above are the correct precautions to be taken while taking the reading of the laboratory thermometer.

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