The quantity of thermal energy generated from full combustion of 1 kg of fuel is called-
Calorific value
Calorific value is correct.
The calorific value of a fuel is the amount of heat energy produced when 1 kg of the fuel burns completely in air. It is measured in kilojoules per kilogram (kJ/kg).
A higher calorific value means a better fuel. For example, LPG has a calorific value of about 55,000 kJ/kg, while cow-dung cakes give only about 6,000 to 8,000 kJ/kg, and hydrogen has one of the highest values of all fuels.
Important Questions from Chemistry in Everyday Life
Consider the following statements and select the correct option.
Statement A: Plants require specific soil pH for proper growth.
Statement B: Farmers use pH values to decide the type of fertiliser to add.Consider the following statements and select the correct option.
Statement A: Sugarcane juice can be fermented to give alcohol (ethanol).
Statement B: Alcohol is added to petrol because it is a cleaner fuel.
- At what pH does tooth decay begin to occur in the human mouth?
- Read the following statements carefully and select the correct option. Assertion (A): Keeping oily food in airtight containers prevents rancidity. Reason (R): Airtight containers slow down the oxidation of fats and oils.
Which of the following statement(s) about the artificial sweeterning agents is/are TRUE?
1. Ortho-sulphobenzimide is the first popular artificial sweetening agent.
2. Ortho-sulphobenzimide is also called as saccharin.
3. Ortho-sulphobenzimide is about 100 times as sweet as cane sugar.Choose the correct answer from the options given below:
