1472. Which among the following result in the formation of soil?

A. Radiation
B. Weathering
C. Erosion
D. Pollution
✅ The correct answer is option B.
Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.

1474. The climate of a given region is

A. average temperature and precipitation conditions for every day of the year in a given region
B. average temperature and precipitation conditions
C. its weather patterns
D. its weather
✅ The correct answer is option A.
The climate of a given region is average temperature and precipitation conditions for every day of the year in a given region

1475. Maximum deposition of DDT will occur in

A. phytoplankton
B. crab
C. eel
D. sea gull
✅ The correct answer is option D.
The maximum number of deposition of DDT will occur in phytoplankton crabeelor seagull. DDT is a colourless, odourless and a tasteless crystalline chemical compound, which was originally invented as an insecticide.

1477. During the course of a year, the sun will disappear from view near the North Pole on what date?

A. June 21
B. September 23
C. December 23
D. January 1
✅ The correct answer is option B.
At the Autumn Equinox, approximately September 23, the sun sinks below the horizon, and the North Pole is in twilight until early October, after which it is in full darkness for the Winter.

1478. 21 September is celebrated as –

A. International Day of Peace
B. World diabetes Day
C. International Men’s Day
D. World Television Day
✅ The correct answer is option A.
International Day of Peace (UN) is observed on 21 September around the world. For the first time it was observed in September 1982 and in 2001, the General Assembly adopted a resolution 55/282, which established 21 September as International Day of Peace of non – violence and cease – fire.

1479. What is “temporary threshold shift”?

A. Hearing loss due to excessive noise
B. Noise that is untolerable
C. Tolerable noise
D. inaudible noise
✅ The correct answer is option A.
A temporary threshold shift is a temporary shift in the auditory threshold. It may occur suddenly after exposure to a high level of noise, a situation in which most people experience reduced hearing. A temporary threshold shift results in temporary hearing loss.

1480. India Celebrates 28 February every year as ‘National Science Day’ because on this day –

A. first Indian Space craft was launched
B. Nehru laid the foundation of Science labs all over India
C. in 1928 C. V. Raman discovered what was later called the ‘Raman Effect’
D. Vikram Sarabhai was born
✅ The correct answer is option C.
28 February recalls the notable invention “Raman Effect” by India’s greatest scientist C. V. Raman. He was awarded the Nobel Prize for this discovery.