Study of Gas Laws — CHEMISTRY STD 9 — Question

(a) Name an alkali metal other than lithium, sodium and potassium.
(b) Name an alkaline earth metal other than calcium, strontium and barium
(c) Name one halogen other than chlorine, bromine and iodine
(d) Name a non metal having properties similar to carbon.
(e) Name a rare gas other than neon, krypton and xenon.

Why do the isotopes of same elements have similar chemical properties?

Compare hydrogen and halogens on the basis of :
reaction with oxygen

State two ways by which a saturated solution can be changed to unsaturated solution.

Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Nickel bisulphate

Explain why:
Table salts become sticky on exposure to humid air during the rainy season.

The elements A and B have electronic configuration 2, 8, 18, 2 and (2, 6) respectively.
(a) To which periods A and B belong?
(b) To which group A and B belong?

Give an example of each of the following chemical changes:
A reaction involving
(i) blue solution
(ii) formation of dirty green precipitate

What is a decomposition reaction?