Which of the following is incorrect?A. Calorific value of fat is more than that of carbohydrate and protein.B. `Delta_(C ) H^(@)` is always negativeC. Calforific value of kerosene is less than that of coal.D. Butane is the main component of cooking gas.

Which of the following is incorrect?A. Calorific value of fat is more

1.	Which of the following is incorrect?A. Calorific value of fat is more than that of carbohydrate and protein.B. `Delta_(C ) H^(@)` is always negativeC. Calforific value of kerosene is less than that of coal.D. Butane is the main component of cooking gas.
Answer» Correct Answer - C Fluid fossil fuels such as kerosene are popular because they release more heat per gram tha coal does. Kerosene is apporximately `C_(12) H_(26)`, the thermochemical equation is `C_(12) H_(26) (1) (37)/(2) O_(2) (g) rarr 12 CO_(2) (g) + 13 H_(2) O (g)` `Delta_(C ) H^(@) = - 7513 kJ` The average calorific value quoted for carbohydrates and fats are `4.0 cal g^(-1)` and `9.0 kcal g^(-1)`, respectively. Note that fats contain more than twice the fuel value per gram as do carbhydrates. Thus, by storing its fuel s fat, the body can store more fuel for a given mass of body tissue.

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Which of the following is incorrect?A. Calorific value of fat is more than that of carbohydrate and protein.B. `Delta_(C ) H^(@)` is always negativeC. Calforific value of kerosene is less than that of coal.D. Butane is the main component of cooking gas.

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