AP ECET CHEMISTRY Multiple Choice Questions (MCQs)

121. What is the classification of fuels based on physical state?

• a) Solid fuels, liquid fuels, gaseous fuels
• b) Renewable fuels, non-renewable fuels
• c) Conventional fuels, non-conventional fuels
• d) Primary fuels, secondary fuels

Answer: a) Solid fuels, liquid fuels, gaseous fuels

122. Which of the following is an example of a solid fuel?

• a) Petrol
• b) Coal
• c) Natural gas
• d) Water gas

Answer: b) Coal

123. What is the primary characteristic of a good fuel?

• a) High ignition temperature
• b) Low calorific value
• c) Easily available and economical
• d) High moisture content

Answer: c) Easily available and economical

124. What is the primary use of bio-gas?

• a) Industrial fuel
• b) Cooking and heating purposes
• c) Transport fuel
• d) Electricity generation

Answer: b) Cooking and heating purposes

125. What is water gas composed of?

• a) Hydrogen and carbon monoxide
• b) Hydrogen and oxygen
• c) Methane and carbon dioxide
• d) Nitrogen and oxygen

Answer: a) Hydrogen and carbon monoxide

126. Which fuel is produced by partial combustion of coal?

• a) Producer gas
• b) Natural gas
• c) Water gas
• d) Bio gas

Answer: a) Producer gas

127. What is the main component of natural gas?

• a) Methane
• b) Hydrogen
• c) Carbon monoxide
• d) Butane

Answer: a) Methane

128. Which of the following is NOT a gaseous fuel?

• a) Acetylene
• b) Coal gas
• c) Natural gas
• d) Bio gas

Answer: d) Bio gas

129. Which fuel is used in welding and cutting metals?

• a) Producer gas
• b) Water gas
• c) Acetylene
• d) Bio gas

Answer: c) Acetylene

130. What is the process of converting crude oil into useful products called?

• a) Fractional distillation
• b) Hydrogenation
• c) Carbonization
• d) Refining

Answer: d) Refining

131. Which gaseous fuel is mainly used in households for cooking purposes?

• a) Water gas
• b) Natural gas
• c) Coal gas
• d) Acetylene

Answer: b) Natural gas

132. Which of the following is a characteristic of a good fuel?

• a) High cost of extraction
• b) High calorific value
• c) Low availability
• d) High ash content

Answer: b) High calorific value

133. What is the process of refining petroleum primarily intended to achieve?

• a) To convert it into bio-gas
• b) To separate impurities and valuable components
• c) To increase its calorific value
• d) To reduce its cost of extraction

Answer: b) To separate impurities and valuable components

134. Which fuel is primarily used for generating electricity in thermal power plants?

• a) Coal
• b) Natural gas
• c) Water gas
• d) Bio-gas

Answer: a) Coal

135. What is the main benefit of using bio-gas as a fuel?

• a) It is a non-renewable energy source
• b) It is environmentally friendly
• c) It has a low calorific value
• d) It is not suitable for cooking

Answer: b) It is environmentally friendly