General Knowledge

✅ The correct answer is option A.
For purifying drinking water alum is used for coagulation of mud particles. Aluminium Sulfate, Shortly known as Alum, when added to raw water reacts with the bicarbonate alkalinities present in water and forms a gelatinous precipitate. The water over this sediment is almost clean other than some fine particles dissolved in it.

✅ The correct answer is option C.
Treaty of Versailles rearranged the boundaries of several countries in Europe and many countries were formed such as Poland and Yugoslavia and Lithuania and Estonia.

✅ The correct answer is option C.
The General Assembly meets every year in regular sessions which begin on third Tuesday in September every year. Tuesday of the third week in September, counting from the first week that contains at least one working day.

✅ The correct answer is option D.
The purpose of OECD (Organisation for Economic Cooperation and Development) is to sustained economic growth, employment and higher standards of living.

✅ The correct answer is option C.
To produce sound it is necessary that the source may execute any type of vibrations. Sound requires material medium for its propagation. It is produced when a body vibrates. The vibrations produced at a point are transmitted in the medium (air) from one point to the next and so on in the form of mechanical waves which produce compressions and rarefactions in air.

✅ The correct answer is option C.
The Sports Authority of India was registered as a society in 1984. The Sports Authority of India (SAI), a successor Organization of the Ixth Asian Games held at New Delhi in 1982, was set up as a Society registered under the Societies Registration Act 1860 in pursuance of the Resolution No. 1-1/83/SAI dates 25th January, 1984 of the then Department of Sports, Govt.

✅ The correct answer is option C.
The velocity of light was first measured by Romer. The first measurements of the speed of light using completely terrestrial apparatus were published in 1849 by Hippolyte Fizeau (1819–96). Compared to values accepted today, Fizeau’s result (about 313,000 kilometres per second) was too high, and less accurate than those obtained by Rømer’s method.

✅ The correct answer is option B.
The department of Atomic Energy was established in 1956. The Atomic Energy Commission is the governing body of the Department of Atomic Energy (DAE), Government of India. The DAE is under the direct charge of the Prime Minister. The Indian Atomic Energy Commission was set up on 10 August 1948 under the late Department of Scientific Research. A resolution passed by the Government of India later replaced the commission by “Atomic Energy Commission of India” on 1 March 1958 under the Department of Atomic Energy with more financial and executive powers.

✅ The correct answer is option D.
In 1993, Ranasingha Premadasa, President of Sri Lanka, assassinated.

✅ The correct answer is option B.
International Labour Organisation is related to the United Nation was in existence before the Second World War. The International Labour Organization is a United Nations agency whose mandate is to advance social justice and promote decent work by setting international labour standards. It was the first specialised agency of the UN.