Which of the following element is purified by vapour phase refining?

• Fe

• Zr

• Cu

• Au

142.

Heating a mixture of Cu₂O and Cu₂S will give

• CuO + CuS

• Cu + SO₃

• Cu + SO₂

• Cu(OH)₂ + CuSO₄

With respect to an ore, Ellingham diagram helps to predict the feasibility of its

• Thermal reduction

• Electrolysis

• Zone refining

• Vapour phase refining

Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.

• Both the assertion and reason are correct and the reason is the correct explanation for the assertion.

• Only the assertion is correct.

• Both the assertion and reason are correct, but the reason is not the correct explanation for the assertion

• Only the reason is correct

The one that is not a carbonate ore is:

• Calamine

• Siderite

• Malachite

• Bauxite

The Mond process is used for the:

• extraction of Zn

• purification of Ni

• purification of Zr and Ti

• extraction of Mo

The ore that contains the metal in the form of fluoride is

• cryolite

• malachite

• magnetite

• Sphalerite

Match the refining methods (column I) Watch metals (column-II)

• I-b, II- c, III-d, IV-a

• I-c, II-d, III-b, IV-a

• I-c, II-a, III-b, IV-d

• I-b, II-d, III-a, IV-c

The correct statement is :

• Zincite is a carbonate ore.

• Zone refining process is used for the refining of titanium

• Aniline is a for the stabilizer

• Sodium cyanide cannot be used in the metallurgy of silver