Defence GK Questions 2026

In a given medium under the same conditions, sounds of all frequencies travel at the same speed; the speed depends on the medium, not on the pitch.

Light travels fastest in a vacuum; in any material medium, including carbon disulphide, it slows down, so its speed there (X) is less than its speed in vacuum (Y).

Odisha holds the largest share of India's bauxite reserves and almost all of its chromite, making it the leading state for both minerals.

The Ganga rises on the Indian side of the Great Himalaya, at the Gangotri glacier in Uttarakhand, while the Indus, the Satluj and the Brahmaputra all rise beyond the Himalaya in Tibet.

The bulb of a headlight is placed at the principal focus of a concave mirror, so the reflected light leaves as a strong beam of parallel rays that reaches far down the road.

This is the incorrect statement: Article 148(4) bars the CAG from any further office under the Government of India or of any State after leaving the post.

Dr. Bindeshwar Pathak founded the Sulabh movement in 1970 in Bihar to end manual scavenging and bring low-cost toilets to India.

UNESCO named the Brazilian city the first ever World Capital of Architecture, for the year 2020. The title was created by UNESCO together with the International Union of Architects (UIA).

The Bharat Ratna for 2019 went to three people: former President Pranab Mukherjee, social reformer Nanaji Deshmukh and singer-composer Bhupen Hazarika, so two others were honoured along with him.

Turmeric is a natural indicator: soap is basic and turns the yellow stain reddish brown, and rinsing with plenty of water removes the soap so the stain turns yellow again.

Thrust is a force and impulse is force multiplied by time, so thrust divided by impulse has the unit 1/second (s⁻¹), which is the unit of frequency.

In his final Test, against Bangladesh at Christchurch in January 2022, the New Zealand batter came on to bowl and took the last wicket, which also won the match for his side.

The cochlea of the inner ear changes the pressure variations of sound into electrical (nerve) signals, which the auditory nerve then carries to the brain.

In glass, light of shorter wavelength travels more slowly, so the glass has a higher refractive index for it and bends it more.

A system whose walls let no heat pass in or out is called adiabatic, so any change in its state happens with zero heat exchange (Q = 0).

The Atal Innovation Mission (AIM) was set up by NITI Aayog in 2016 as the Government of India's flagship programme to promote innovation and entrepreneurship.

At the 2016 Rio de Janeiro Olympics, India won two medals, both by women: a silver in badminton and a bronze in wrestling.

Sangam literature describes the vellalar as the large landowners of the Tamil region, while the people who actually worked the land are named separately.

Apart from the Sun, Proxima Centauri is the star nearest to the Earth, about 4.24 light years away. Proxima Centauri is a small, dim red dwarf in the constellation Centaurus and cannot be seen with the naked eye.

Kunzru, a member of the Servants of India Society, organised the Seva Samiti at Allahabad in 1914 to carry out social service and relief work.