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Q. Brass gets discoloured in air because of the presence of which of the following gases in air?
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Q. The biological decomposition of organic substances in wastes under controlled conditions known as
Q. Mirage is due to
Q. A boat will submerge when it displaces water equal to its own –
Q. A person having AB-group of blood can donate blood to a person having
Q. Milk tastes sour when kept in the open for sometime due to the formation of
Q. In which of the following activities silicon carbide is used?
Q. Bakelite is a copolymer of Phenol &
Q. In bio fortification technique plant breeders use breeding to overcome
Q. Which of the following one of the following contributes largely to the 'green house effect'
Q. William Frederick is credited with the invention of the modern Frisbee in the mid 1950's. In 1957 th...
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