Q. Which one of the following was the first mineral acid discovered
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Q. Of all the gases present in the air, which one of the following is the highest in percentage?
Q. For shaving which type of mirror is used
Q. he first 'thermionic value' was invented by
Q. Over 90% of the world's biomass is in
Q. The number of heart beats on an average in an adult human is in the range of
Q. The normal value of acceleration due to gravity is
Q. Diamond does not conduct electricity, as
Q. Which of the following Liquid contains Highest Rate of vaporization?
Q. Brass gets discoloured in air due to the presence of which gas in air?
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