Question

By which of the following processes, the ore is made porous?

Solution

Correct option is

Roasting and Calcination

Both roasting and calcination make the ore porous.

SIMILAR QUESTIONS

Q1

Among the following groups of oxides, the group containing oxides that cannot be reduced by carbon to give the respective metal is

Q2

van-Arkel method of purification of metals involves converting the metal to a

Q3

A metal which is refined by poling is

Q4

Wolframite ore is separate from tin stone ore by the process of

Q5

Pb and Sn are extracted from their chief ore by

Q6

‘Lapis-Lazuli’ is a blue coloured precious stone. It is mineral of the class

Q7

Gallium arsenide is purified by

Q8

Which of the following is correct?

Q9

Metals found in free as well as combined states are

Q10

Stainless steel has iron and