Defence GK Questions 2026

The Irani Cup is a single first-class match in which the team that has just won the Ranji Trophy meets a Rest of India eleven drawn from all the other state teams, and a good performance in it has long been treated as a step towards national selection.

The Board of Control for Cricket in India set up a national first-class championship in 1934 and the first season was played in 1934-35, with Bombay winning the title.

Kumar Shri Ranjitsinhji, the Jam Saheb of Nawanagar, played for Sussex and for England at the end of the nineteenth century and was among the first cricketers of Indian birth to be ranked with the greatest batsmen of his time.

Thomas Graham found in 1833 that a light gas spreads through a porous partition faster than a heavy one, and that the rates of two gases are in the inverse ratio of the square roots of their densities, and therefore of their molar masses.

At ordinary atmospheric pressure carbon dioxide has no liquid stage: the solid passes straight into vapour at about minus 78.5 degrees Celsius.

In a liquid the resistance to flow comes mainly from the attraction between neighbouring molecules. Heating gives the molecules energy to slip past one another, so the attraction matters less and the liquid thins; hot honey and warm engine oil pour far more easily than cold.

Evaporation is a surface phenomenon in which the fastest-moving molecules of a liquid break free. Doing so needs the latent heat of vaporisation, and that energy is drawn from the liquid left behind and from whatever the liquid touches, so both grow cooler.

This is the heat one gram of ice at 0 degrees Celsius must absorb to become one gram of water at 0 degrees Celsius; the temperature does not rise at all while it melts, because the energy goes into breaking the hydrogen-bonded lattice.

Bromine is a dark reddish-brown, dense, fuming liquid at ordinary room temperature, with a melting point of about minus 7 degrees Celsius and a boiling point of about 59 degrees Celsius.

Plasma is a hot, electrically conducting mixture of free electrons and positive ions produced when a gas is heated or strongly ionised.

Water contracts as it is cooled from higher temperatures like any other liquid, but only down to 4 degrees Celsius.

Boyle s law applies to a fixed mass of gas at constant temperature and states that pressure is inversely proportional to volume, so the product of the two is a constant: P1 into V1 equals P2 into V2.

In 1924 Satyendra Nath Bose sent Albert Einstein a paper deriving Planck s radiation law by counting indistinguishable light quanta.

A change of state is governed by the energy of the particles. When a solid absorbs heat its particles vibrate harder until the force holding them in the lattice is overcome and it melts; further heat lets the liquid particles escape as vapour.

Trained as a physicist, she turned to agriculture and founded Navdanya, a network of community seed banks that collects, stores and freely exchanges traditional varieties of rice, millet, pulses and oilseeds, and that campaigns against the patenting of seed and of plants long used in India.

The Tawa project on a tributary of the Narmada in Hoshangabad district of Madhya Pradesh brought canal irrigation to black cotton soil that already held water well.

From the late nineteen seventies Jadav Payeng planted saplings year after year on a bare, eroding sandbar of the Brahmaputra near Majuli, and the patch grew into a forest of several hundred hectares that is now called the Molai forest after him.

In 1982 the government proposed to convert the natural sal forests of Singhbhum, then in Bihar and now in Jharkhand, into plantations of teak, which fetches a far higher price as timber.

He carried the Chipko message on foot across the Himalaya and summed up its argument in the phrase that ecology is permanent economy, meaning that a standing forest yields soil, water and pure air for ever while felled timber yields money once.

Through the Tarun Bharat Sangh he revived the johad, the traditional crescent-shaped earthen check dam, across the dry Alwar district of Rajasthan.