This dolphin species, often found in the Ganga river, is declared India’s National Aquatic Animal and is protected especially in Bihar’s stretch of the river. Commonly appears in Bihar environmental science questions.

Rajendra Agricultural University, now Dr. Rajendra Prasad Central Agricultural University, is situated at Pusa.

The Ganga river is a major river flowing through Bihar, and it is regularly studied for pollution levels under programs like Namami Gange.

Explanation: In the Haber process, nitrogen and hydrogen gases are combined under high pressure and temperature in the presence of an iron catalyst to produce ammonia (NH₃). Hydrogen is typically obtained from natural gas or water electrolysis. Ammonia is essential for fertilizer production. This process revolutionized global agriculture in the 20th century.

Explanation: Percolation is the process where water slowly filters through the soil and rocks, helping in the natural purification of water. This movement removes many impurities and harmful organisms. The filtered water eventually collects in underground aquifers. It is crucial in the natural water cycle. Human interference often affects this important ecological function.

Lead-acid batteries can be recharged multiple times (used in vehicles).

Rayleigh scattering causes blue light to scatter more than other wavelengths.

HCl helps in digestion and kills harmful microbes.

Rhizobium lives in the root nodules of legume plants.

This is the heating effect of electric current.

The mantle is about 2900 km thick — the thickest layer.

Refraction occurs because light slows down in denser medium like water.

The pituitary gland regulates most hormonal functions.

1 Hz = 1 cycle per second, used for wave frequency.

The Double Helix model was proposed by Watson and Crick.

Black holes have such intense gravity that not even light can escape.

Although Bismuth is very slightly radioactive, it's considered effectively stable in nature.

: Violet has the shortest wavelength in visible light.

: An electric motor uses electricity to create motion.

Convex mirrors provide a wider field of view.

Apple, Banana, and Orange are fruits; Carrot is a vegetable.

A doctor works in a hospital; a teacher works in a school.

Located in Jalukie, it focuses on animal health and research.

NIT Nagaland has been advancing technological innovation since 2010.

NIT Nagaland, established in 2010, focuses on engineering and technology research.

Nagaland University, established in 1994, is a hub for scientific studies in the region.

Established in 1988, NRCM advances scientific research on Mithun.

Located in Dimapur, NRCM focuses on Mithun breeding and genetics.