The most electronegative element among the following is ?
The number of moles of solute present in 1 kg of a solvent is called its ?
The nucleus of an atom consists of ?
The metal does not give H2 on treatment with dilute HCL is ?
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is ?
The most extensive, commercially useful source of thorium as monazite sand occurs in India at ?
The main active constituent of tea and coffee is ?
The maximum number of isomers for an alkene with molecular formula C4H8 is ?
The hardest form of carbon is ?