The element which is stored under kerosene is
(a) sulphur
(b) phosphorus
(c) sodium
(d) silicon
Which of the following elements is a metalloid ?
(a) sodium
(b) sulphur
(c) silicon
(d) silver
(a) Why is sodium kept immersed in kerosene oil? (b) Why is white phosphorus kept immersed under water? (c) Can we keep sodium immersed under water? Why?