Environment

The main reason for blueness of the sky is

• Due to the presence of water vapor

• Due to the absorption of blue light due to the air

• Due to the scattering of sunlight by air molecules

• None of the above

Which of the following is the cause of soil pollution?

• Ozone

• Aerosol

• Acid rain

• None of the above

At what time of the day relative humidity in the environment is at minimum?

• When the air temperature is lowest

• Before sunrise

• Midnight

• When the air temperature is higher

The solar cell converts which energy into electrical energy?

• Chemical energy

• Solar energy

• Magnetic energy

• None of the above

Which of the following is a renewable source of energy?

• Coal

• Uranium

• Wind

• None of the above

Which of the following has a maximum speed?

• Light

• Air

• Sound

• Water current

Paper is made up of

• Polythene and cotton

• Starch and cellulose

• Grass and Bamboo

• None of the above

Which of the following is the hottest planet of the solar system?

• Venus

• Mercury

• Jupiter

• Uranus

CPCB stands for

• Control pollution control board

• Central pollution central board

• Control pollution central board

• Central pollution control board

Which of the following are the negative health effects of noise pollution?

• Hypertension

• Hearing loss

• Stress and headache

• All of the above