Organic Chemistry — Chemistry STD 10 — Question

Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction
Write three balanced equation for the purification of bauxite ?

Give one chemical test to distinguish between the following pairs of compounds.
(i) Zinc sulphate solution and zinc chloride solution.
(ii) Iron(II) chloride solution and iron(III) chloride solution.
(iii) Calcium nitrate solution and calcium chloride solution.

Give the necessary conditions and equations of getting ethanol from:
(a) Alkyl halide
(b) An ethene

Give two balanced reactions of each type to show the following properties of sulphuric acid:
Acidic nature.

The following question refer to the extraction of aluminium and iron from their ores:
What is the most important chemical process in the extraction of any metal? State how this essential step is carried out in the extraction of: i. iron, and ii. Aluminium.

State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.

What is the difference between : An alkali and a base?

Give reason for the following:
Aqua regia dissolves gold and platinum.

Name three compounds formed by ethene and give one use of each compound.