Defence GK Questions 2026

A metal filament's resistance rises as it heats up, so the current falls and the resistor gets a smaller share of the voltage.

The stinging hairs of the nettle plant inject methanoic acid, also called formic acid, into the skin. Each nettle hair is a fine, brittle tube that breaks on touch and pushes its contents into the skin like a tiny needle.

These low-pressure systems travel east from the Mediterranean region and bring winter rain and snow to Kashmir and north-west India.

It contains hydrochloric acid and has a pH of about 1.5 to 2, the lowest of the four, so it has the most hydrogen ions.

A nanometre is 10⁻⁹ m and an ångström is 10⁻¹⁰ m, so one nanometre holds ten ångströms.

A plane mirror forms an image behind the mirror where light only seems to come from, with left and right swapped.

The lithosphere is the rigid outer shell of the Earth, made of the crust and the uppermost, solid part of the mantle.

Electric power equals voltage times current, so the current is 60 W ÷ 240 V = 0.25 A. The relation P = VI comes straight from the definitions: voltage is energy per unit charge and current is charge per second, so their product is energy per second, or power.

Its density is about 0.86 g/cm³, less than that of water, so it floats while it reacts. Potassium is an alkali metal, soft enough to cut with a knife.

Bacteria have peptidoglycan walls and animal cells have no wall, but fungal walls are made of chitin, not cellulose. Statement 1 is correct: peptidoglycan, also called murein, is a mesh of sugars cross-linked by short peptides; penicillin works by blocking its formation.

Meiosis halves them in the gametes, and fertilisation restores them in the offspring. Each parent makes gametes by meiosis, so a human egg or sperm carries 23 chromosomes instead of 46.

Two vanadium atoms must balance five oxide ions, each of charge −2, so each vanadium carries +5. In a neutral compound the oxidation states add up to zero.

As Viceroy, he issued the Resolution on Local Self-Government of 18 May 1882, remembered as its Magna Carta. Ripon, Viceroy from 1880 to 1884, wanted local boards and municipalities with a majority of elected, non-official members and an elected chairman where possible.

A liquid boils when its vapour pressure rises to match the pressure of the air above it. As a liquid is heated, more molecules escape as vapour and its vapour pressure climbs.

When light enters a denser medium, its wavelength is divided by the refractive index of that medium. The frequency of light is fixed by its source and does not change on refraction.

Cobalt, lithium and nickel are cathode materials, while graphite is used for the anode. A lithium-ion battery has a positive electrode (cathode), a negative electrode (anode) and an electrolyte through which lithium ions move.

Lake Turkana is the world's largest desert lake and a UNESCO World Heritage Site known as the Jade Sea, but it lies in Kenya, not South Sudan.

The 2011 FSSAI labelling rules made the list of ingredients, nutrition information and the vegetarian or non-vegetarian mark compulsory, but not medical advice on allergies.

The Rangeet is a Sikkim river that joins the Teesta, but the Teesta neither shares the Brahmaputra's source nor reaches the sea by itself.

Delhi lies at about 77.2° East and Bengaluru at about 77.6° East, so the two are almost on the same meridian.