Wali Khan Kakar

12) Water boils quicker on mountains. Ans: On Mountains the pressure of the air is low due to height, as the air pressure decreases with ...Read More

9) Why the green house operators paint their glass roofs white in summer?

9) Why the green house operators paint their glass roofs white in summer? Read More

8) It is not advisable to sleep under trees during the night.

8) It is not advisable to sleep under trees during the night. Ans: During night the plants release carbon dioxide (CO2) which is a poison...Read More

7) Ice and salt mixture is used as a freezing agent by manual ice-cream makers.

7) Ice and salt mixture is used as a freezing agent by manual ice-cream makers. Ans: In manual ice-cream making a mixture of salt and i...Read More

Water remains cool in earthen pitcher.

6):Water remains cool in earthen pitcher. Ans: This occurs due to the process of evaporation. Water gets cooled on evaporation. As the ear...Read More

Roads are bent inwards on curves. Why?

Ans: The roads are bent inwards on the curves and at the turns because the bents avoid falling outside and prevent the accidents. OR When an...Read More

The sky from moon appears black. Why?

Ans: as the moon has no atmosphere, so the sky looks completely black when viewed from the moon. Read More

The ozone layer in the atmosphere is necessary for our survival. Why?

Ans: ozone layer in the atmosphere is very necessary for plant and animal survival because it is the absorber of ultraviolet rays which are ...Read More

The Sun appears red at sunset and sunrise. Why?

Ans: The sun appears red at the time of sunset and sunrise due to the scattering of light by small particles of dust or smoke near the surfa...Read More

The Earth bulges out at equator. Why?

Ans: This is due to the shape of the earth. The earth is not a true sphere but it is an ellipsoid. The equatorial diameter of the earth is 1...Read More

_Everyday Science MCQs for CCE 2018