Mortar is a mixture of

In India,at the occasion of marriages,the fireworks used give a green flame. Which one of the following radicals may be present?

The property of the alkaline earth metals that increases with their atomic number is

Which of the following is the characteristic outer shell electronic configuration of alkaline earth metals?

When a metal is burnt in air,the resulting ash,upon moistening,gives the smell of $NH_3$. Which metal is it?

$CO_2$ is passed through lime water. Initially,the solution turns milky and then becomes clear upon continued bubbling of $CO_2$. The clear solution is due to the formation of: