Among the following unit of heat is /are

Explanation:

1. Calorie (Cal):
   • The calorie is a unit of heat used in physics and chemistry.
   • One calorie is the amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius.
   • It is commonly used in food energy calculations.
2. Kilocalorie (Kcal):
   • The kilocalorie is equal to 1000 calories and is also a unit of heat.
   • It is often used in dietary contexts to describe the energy content in food.
3. Joule (J):
   • The joule is the SI unit of heat and energy.
   • It is a universal unit, with one calorie approximately equal to 4.18 joules.
4. Kelvin (K):
   • Kelvin is not a unit of heat but a unit of temperature.
   • It is the SI unit for temperature measurement and is based on the absolute temperature scale.

Solution:

Among the options, the units of heat are Cal, Kcal, and Joule, which measure the energy transfer in the form of heat. Kelvin, however, is not a unit of heat; it measures temperature.

Final Answer:

• Units of heat: Cal, Kcal, Joule (a, b, c).
• Kelvin (K): Unit of temperature (d).