Metallurgy digital book with solutions

Q. 1/10· Easy

Bauxite, the ore of aluminium, is purified by which process ?

Q. 2/10· Easy

Which of the following is chalcopyrite?

Q. 3/10· Easy

Identify metals present in brass.

Q. 4/10· Easy

Which of the following is not a mineral of iron ?

Q. 5/10· Easy

The following set of reactions are used in refining zirconium.

Q35 figure 1

This method is known as

Q. 6/10· Easy

Which element is obtained in the pure form by van Arkel method?

Q. 7/10· Easy

Which pair of elements from following is used to make alloy for trophies?

Q. 8/10· Easy

Which from following is a mineral of copper?

Q. 9/10· Medium

In the metallurgy of zinc, the reducing agent employed in reducing the zinc oxide to crude zinc metal in the last stage is

Q. 10/10· Hard

For following reactions

Q48 figure 1

it was found that the $E_{a}$ is decreased by 30 kJ/mol in the presence of catalyst. If the rate remains unchanged, the activation energy for catalysed reaction is (Assume pre exponential factor is same)