Organic Chemistry — Chemistry STD 10 — Question

(a) What do you understand by the term roasting of ore?
(b) What is the importance of roasting in the extraction of metals?

In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) The iron (III) oxide?

Name one metal occurring as a : Sulphide ore

Acetic acid is a typical acid. Write one equation in case of its reactions with A carbonate?

Draw the structural formulae of the two isomers of butane. Give the correct IUPAC name of each isomer.

Give reason for the following:
Nitric acid can be stored in aluminium containers.

state two properties of brass that render it more useful for some purpose than its components?

State the type of bonding present in ammonia, show by a diagram?

Give a balanced equation for the following conversation.
An alkene to an alcohol