GK INFOPEDIA

[1] This substance is commonly known as alcohol and is also used in medicines such as tincture iodine, cough syrups, and many tonics. This is – A. Propanol B. Butane C. Ethanol D. Methanol Ans: Ethanol Explanation : Ethanol is commonly called alcohol and is the active ingredient of all alcoholic drinks. Also, it is […]

[1] The main source of Naphthalene is – A. Charcoal B. Camphor C. Coal-tar D. Diesel Ans: Coal-tar Explanation : Coal tar is a brown or black liquid of extremely high viscosity. In the coal gas era, there were many companies in Britain whose business was to distill coal tar to separate the higher-value fractions, […]

[1] Among the following the hardest metal is – A. Gold B. Iron C. Platinum D. Tungsten Ans: Tungsten Explanation : Titanium is the hardest natural metal in the world. It is very strong, three times the strength of steel and much stronger than gold, silver and platinum and yet is very light weight. Tungsten […]

[1] Neutron was discovered by – A. Chadwick B. Rutherford C. Fermi D. Bohr Ans: Chadwick Explanation : Neutron was discovered by James Chadwick in the year 1932. The neutron is a subatomic particle, symbol n or n⁰, with no net electric charge and a mass slightly larger than that of a proton. Protons and […]

[1] Which one of the following metals does not react with water to produce Hydrogen? A. Cadmium B. Lithium C. Potassium D. Sodium Ans: Cadmium Explanation : Cadmium is a soft, malleable, ductile, bluish-white divalent metal. It is similar in many respects to zinc but forms complex compounds. Unlike other metals, cadmium is resistant to […]

[1] Which of the following is a not a green house gas? A. Carbon Dioxide B. Water Vapour C. Carbon Monoxide D. Nitrous Oxide Ans: Carbon Monoxide Explanation : The primary greenhouse gases in Earth’s atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. [2] Heat resistant variety of glass is – A. […]

[1] Energy use in solar cookers, solar distillation plants, solar power plants is known as – A. chemical energy B. solar energy C. thermal energy D. nuclear energy Ans: solar energy Explanation : Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar […]

[1] Which among the following elements is found in maximum percentage in the human body? A. Carbon B. Hydrogen C. Nitrozen D. Oxyzen Ans: Oxyzen Explanation : Most of the human body is made up of water, H2O, with cells consisting of 65-90% water by weight. Therefore, it isn’t surprising that most of a human […]

[1] Muscle fatigue is caused by the accumulation of : A. Pyruvic acid B. Lactic acid C. Oxalacetic acid D. Uric acid Ans: Lactic acid Explanation : It was once believed that lactic acid build-up was the cause of muscle fatigue. The assumption was lactic acid had a “pickling” effect on muscles, inhibiting their ability […]

[1] Bhopal has tragedy is associated with leakage of – A. carbon dioxide B. nitrogen dioxide C. sulphur dioxide D. methyl isocyanate Ans: methyl isocyanate Explanation : The Bhopal disaster, also referred to as the Bhopal has tragedy, was a gas leak incident in India, considered one of the world’s worst industrial disasters. It occurred […]