Defence GK Questions 2026

When light of a suitable frequency falls on a metal and knocks electrons out of it, the process is called photoelectric emission.

Carbon monoxide binds to the haemoglobin of red blood cells to form carboxyhaemoglobin, so the blood can no longer carry oxygen to the tissues.

In the hills of Uttarakhand the river is called the Kali (or Mahakali); it takes the name Sarda (Sharda) only after it reaches the plains.

. Thyroxine sets the body's basal metabolic rate, that is, how fast cells use oxygen and food to release energy.

The refrigerator uses 5 kW × 10 h × 30 days = 1,500 kWh, and at ₹ 4 per kWh that costs ₹ 6,000.

. When quicklime reacts with water a large amount of heat is released, so the reaction is exothermic.

Papaya bears unisexual flowers: a flower has either stamens or a pistil, and male and female flowers usually grow on separate plants.

The Mohorovicic discontinuity, or Moho, is the boundary between the crust and the mantle, where seismic waves suddenly speed up.

. Mica is an excellent electrical insulator that withstands high voltage and heat, so it is used mainly in the electrical and electronic industries.

Pollen grains are formed by meiosis, the division that halves the chromosome number and DNA content of the parent cell.

The Rowlatt Act (March 1919) came first, then the Jallianwala Bagh massacre (April 1919), the All-India Khilafat Conference in Delhi (November 1919) and finally the Non-Cooperation Movement (1920).

In free fall all the potential energy turns into kinetic energy, so 625 J = ½ × 0.32 kg × v², which gives v = 62.5 m/s. First change the mass into kilograms: 320 g = 0.32 kg.

Both statements are correct: the Coriolis force works at right angles to the pressure gradient force, and it vanishes at the equator, where winds cross the isobars at right angles.

After the Third Five Year Plan (1961-66) ran into trouble, India ran three one-year Annual Plans from 1966 to 1969 before the Fourth Plan began.

The primary spermatocyte is the diploid cell that enters meiosis I and splits into two haploid secondary spermatocytes. Spermatogenesis takes place in the seminiferous tubules of the testes.

Article 107 of the Constitution decides which bills die when the Lok Sabha is dissolved. A bill pending in the Lok Sabha lapses on its dissolution, whether it began there or came from the Rajya Sabha, so statement 1 is correct.

Iran has never been a member of the Gulf Cooperation Council, though it lies on the Persian Gulf. The GCC was founded in May 1981 in Abu Dhabi by six Arab monarchies of the Arabian Peninsula: Saudi Arabia, Kuwait, Bahrain, Qatar, the United Arab Emirates and Oman.

The Indian Ocean Dipole lies wholly within the Indian Ocean, and it can soften or strengthen El Nino's effect on the monsoon.

Carbon fertilization is the rise in the rate of photosynthesis, and so in plant growth, when there is more carbon dioxide in the air.

Only statement 2 is true. Statement 1 is wrong because jet streams, the narrow belts of very fast westerly winds near the top of the troposphere, blow in both hemispheres.