The primary component of natural gas

The gas that is less dense than air is

The periodic property that is used to determine whether a covalent molecule is polar or not is

If \(100^3\) of a saturated solution of sodium tetraoxosulphate (VI) at 30° C contains 10.5 g of the salt, what would be its solubility at this temperature? [(\(Na_2SO_4\) = 142]

A compound that could be dried by using conc. tetraoxosulphate (VI) acid and not by calcium oxide is likely to be