A solid X when heated gives off a brown gas. If X is soluble in excess sodium hydroxide solution but insoluble in excess ammonium hydroxide solution, then X...

A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white clo...

In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm3 of 1.25 molar...

The periodic classification of elements is an arrangement of the elements in order of their

An element X forms the following compounds with chlorine; XCl4, XCl3, XCl2. This illustrates the

Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

The oxidation state of chlorine in potassium chlorate is

Zinc Oxide is a

When sodium chloride and metallic sodium are each dissolved in water