Question

Statement I: Faster the motion of the molecules in a body, lower will be its temperature.
Statement II: In steam engines, heat energy is converted to mechanical energy.

• A. Statement l is correct and statement ll is incorrect.​
  
• B. Statement l is incorrect and statement ll is correct.​
  
• C. Both the statements are correct.​
  
• D. Both the statements are incorrect.​
  

Answer 1

The correct option is B Statement l is incorrect and statement ll is correct.​


The molecules of a hot body move with more speed and more randomly as compared to the molecules of a cold body. With an increase in temperature, the particles of a body move faster.

Also, heat is a form of energy. In steam engines, a huge amount of coal is burnt to produce heat energy. This heat energy is converted into mechanical energy which rotates the wheels of the train.
Thus, statement I is incorrect and statement II is correct.