The p-Block Ele...

Boric acid is prepared from borax by the action of

$$Na_{2}B_{4}O_{7.}\, 10\, H_{2}O$$ is:

Which of the following molecules is nonpolar?
(i)$$PbCl_4$$
(ii)$$BF_3$$
(iii)$$SnCl_2$$
(iv)$$CS_2$$

An element 'X' atomic number 51 belongs to ______.

Indite is a mineral for the production of ______.

Pure air contains nitrogen, oxygen and small amounts of other gases. The noble gases have been left out of the table.
Which row shows the composition of dry, unpolluted air?

Which has an electron configuration $$1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$$?

In the ground state the carbon atom has .... unpaired electron/ electrons:

Which of the following member of the carbon family does not have an allotrope?

Tincal contains mainly :