Question

The value of one calorie is equal to

• A. 1.4 J
• B. 2.4 J
• C. 4.2 J
• D. 4.2 K J

Answer 1

The correct option is C

4.2 J

Explanation for correct option:

1. We know, $1calorie=4.2J$
2. Calorie is a unit commonly used to measure the amount of heat.
3. It is abbreviated as $cal$.
4. $1cal$ is the amount of heat which can raise the temperature of $1g$of water by $1^{0}C$.
5. The SI unit of calorie joule.

Hence, $1calorie=4.2J$

Thus, option (B) is the correct option.