Solved Sample Paper 1 — Question 22

Question 8(iii)

Choose the most appropriate option from the following list of elements which fit in the description. Each option may be used only once.

[Aluminium, helium, carbon, phosphorous, sodium, potassium, argon, hydrogen]

(a) An element with variable (more than one) valency and stored in water.

(b) An element present in period 3 and group I of the periodic table.

(c) An element which is an inert gas with atomic number 2.