Question

A lab thermometer is used to measure the temperature of a chemical solution as shown below. The temperature recorded by the thermometer is______.

• A. 48.3 ℃
• B. 49.3 ℃
• C. 48.6 ℃
• D. 49.6 ℃

Answer 1

The correct option is C 48.6 ℃

In the given case, the mercury level rises to a temperature between 48℃ and 50℃
There is a 2℃ gap between them and the total number of divisions between them is 10.
Then one small division will read = 2/10 = 0.2 ℃.
Here, the mercury level is at 3rd division after 48℃ .
So, the reading of the given lab thermometer is (48 + 3 x 0.2) ℃ = 48.6 ℃.