The most serious air pollutant causing health hazard is
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The common name of hydrogen peroxide is
30 litres of salt solution contains 5% salt. How many litres of water must be added so as to get a resultant solution containing 3%salt?
Which of the following elements has the electronic configuration 2, 8, 3?
A change in which a substance undergoes a change in its physical properties is called _____________.
Which chemical is present in the cells of cork of tree which makes them impervious to gases and water
Which of the following elements has the lowest melting point?
Which of the following inert gases is placed in period 4 of the periodic table?