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46
MCQ (Single Correct Answer)

Match the items of Column I with the items of Column II and assign the correct code.

Column I Column II
A. Coloured bands 1. Zone refining
B. Impure metal to volatile complex 2. Fractional distillation
C. Purification of Ge and Si 3. Mond's process
D. Purification of mercury 4. Chromatography
5. Liquation

A
A - 1, B - 2, C - 4, D - 5
B
A - 4, B - 3, C - 1, D - 2
C
A - 3, B - 4, C - 2, D - 1
D
A - 5, B - 4, C - 3, D - 2
47
MCQ (Single Correct Answer)

Match items of Column I with the items of Column II and assign the correct code.

Column I Column II
A. Cyanide process 1. Ultrapure Ge
B. Froth floatation process 2. Dressing of ZnS
C. Electrolytic reduction 3. Extraction of Al
D. Zone refining 4. Extraction of Au
5. Purification of Ni

A
A - 4, B - 2, C - 3, D - 1
B
A - 2, B - 3, C - 1, D - 5
C
A - 1, B - 2, C - 3, D - 4
D
A - 3, B - 4, C - 5, D - 1
48
MCQ (Single Correct Answer)

Match the items of Column I with the items of Column II nd assign the correct code.

Column I Column II
A. Sapphire 1. $\mathrm{Al_2O_3}$
B. Sphalerite 2. $\mathrm{NaCN}$
C. Depressant 3. $\mathrm{Co}$
D. Corundum 4. $\mathrm{ZnS}$
5. $\mathrm{Fe_2O_3}$

A
A - 3, B - 4, C - 2, D - 1
B
A - 5, B - 4, C - 3, D - 2
C
A - 2, B - 3, C - 4, D - 5
D
A - 1, B - 2, C - 3, D - 4
49
MCQ (Single Correct Answer)

Match the items of Column I with items of Column II and assign the correct code.

Column I Column II
A. Blisterred Cu 1. Aluminium
B. Blast furnace 2. $\mathrm{2Cu_2O+Cu_2S\longrightarrow 6Cu+SO_2}$
C. Reverberatory furnace 3. Iron
D. Hall-Heroult process 4. $\mathrm{FeO+SiO_2\longrightarrow FeSiO_3}$
5. $\mathrm{2Cu_2S+3O_2\longrightarrow 2Cu_2O+2SO_2}$

A
A - 2, B - 3, C - 4, D -1
B
A - 1, B - 2, C - 3, D - 5
C
A - 5, B - 4, C - 3, D -2
D
A - 4, B - 5, C - 3, D -2
50
MCQ (Single Correct Answer)

Assertion (A) Nickel can be purified by Mond's process.

Reason (R) $\mathrm{Ni}(\mathrm{CO})_4$ is a volatile compound which decomposes at 460 K to give pure Ni.

A
Both assertion and reason are true and reason is the correct explanation of assertion.
B
Both assertion and reason are true but reason is not the correct explanation of assertion.
C
Assertion is true but reason is false.
D
Assertion is false but reason is true.
E
Assertion and reason both are wrong.