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Question

The value of one calorie is equal to


A

1.4 J

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B

2.4 J

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C

4.2 J

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D

4.2 K J

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Solution

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 1gof water by 10C.
  5. The SI unit of calorie joule.

Hence, 1calorie=4.2J

Thus, option (B) is the correct option.


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