Question

Choose the incorrect statement from the following. A good fuel is one which-

• A. is readily available
• B. produces a large amount of heat
• C. leaves behind many undesirable substances
• D. burns easily in the air at a moderate rate

Answer 1

The correct option is C

leaves behind many undesirable substances

The explanation for the incorrect option:

Option (C): leaves behind many undesirable substances

1. Fuel is a material that is burned to produce heat or electricity, such as coal, gas, or oil.
2. Fuel may have many disadvantages along with advantages. Some disadvantages are it emits more smoke into the atmosphere, it is expensive, leaves harmful residue behind, burns rapidly on air, etc.
3. To avoid these disadvantages we opt for a fuel that has a high calorific value, the fuel should be at the right temperature for ignition, the combustion rate should be even and mild, and the amount of non-volatile chemicals in the product should be kept to a minimum
4. On combustion, there should be no toxic or residual byproducts, fuel should be readily available in large quantities, the fuel should be reasonably priced, and the fuel must be easy to transport and store.
5. It is difficult to find all the characteristics in one but we opt for a fuel that possesses the majority of these characteristics.
6. The fuel that has these characteristics are identified as ideal fuels.
7. Hence, this is an incorrect statement.

The explanation for the correct options:

Option (A): is readily available

1. Fuel is a material that is burned to produce heat or electricity, such as coal, gas, or oil.
2. It should be readily available in large quantities, and inexpensive.
3. Hence, it is the correct option.

Option (B): produces a large amount of heat

1. Fuel is used to produce heat or electricity. A good fuel is characterized by producing a large amount of heat and burning less amount of fuel.
2. Hence, it is the correct option.

Option (D): burns easily in the air at a moderate rate

1. A good fuel is characterized by burning easily in the air at a moderate rate and leaving no residue behind.
2. Hence, it is the correct option

Therefore, the given statement is "leaves behind many undesirable substances" is incorrect.