The unit of force is —

The speed of light is approximately —

What is the SI unit of power?

Which device converts electrical energy into mechanical energy?

Which type of mirror is used in car headlights?

What happens to the pitch when the frequency of a sound increases?

The energy possessed by a body due to its motion is —

The process of charging a body without contact is called —

The image formed by a plane mirror is —

Water is a —

The chemical formula of baking soda is —

Which gas is known as “laughing gas”?

Which metal is liquid at room temperature?

The atomic number represents the number of —

Rusting of iron is a —

Which acid is present in lemon?

Which gas is essential for combustion?

The purest form of carbon is —

pH value of pure water is —

The smallest unit of life is —

Which part of the plant carries out photosynthesis?

Green pigment in leaves is called —

Which organ purifies blood in the human body?

The largest organ of the human body is —

Blood cells responsible for carrying oxygen are —

Which vitamin is produced by sunlight?

The study of heredity is called —

Plants absorb water through —

Which disease is caused by a mosquito bite?

The ozone layer protects us from —

Which gas is responsible for the greenhouse effect?

Which of the following is a renewable source of energy?

The process of water circulation through evaporation, condensation, and precipitation is called —

The main component of biogas is —

Who proposed the theory of evolution by natural selection?

Earth completes one rotation on its axis in —

Which planet is known as the “Red Planet”?

What is the normal human body temperature?

The hardest natural substance is —

The device used to convert sound energy into electrical signals is —

The phenomenon of bending of light as it passes through water is called —

What is the freezing point of water in Celsius?

The rate of doing work is called —

Which among the following is a non-luminous object?

The unit of electric resistance is —

What type of energy is stored in food?

Which law explains the relationship between pressure and volume of a gas?

Which of the following is a conductor of electricity?

What happens to a solid when it changes directly into gas?