Arrange the following fuels in the increasing order of their calorific values.
Hydrogen gas, wood, LPG, coal, kerosene

Explanation

To arrange the fuels in increasing order of their calorific values, we need to first identify the calorific values of each fuel. Here are the calorific values for the given fuels:

1. **Hydrogen gas**: 150,000 kJ/kg
2. **Wood**: 17,000 to 22,000 kJ/kg (we will consider the average value, which is approximately 19,500 kJ/kg)
3. **LPG (Liquefied Petroleum Gas)**: 55,000 kJ/kg
4. **Coal**: 25,000 to 33,000 kJ/kg (we will consider the average value, which is approximately 29,000 kJ/kg)
5. **Kerosene**: 45,000 kJ/kg

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