The extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:
1. Liquation
2. Distillation
3. Zone refining
4. Displacement with Zn
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA major impurity in pig iron is:
1. Carbon
2. Silicon
3. Phosphorus
4. Manganese
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the extraction of aluminium by the Hall-Heroult process, purified is mixed with to:
a. | Lower the melting point of |
b. | Increase the conductivity of the molten mixture. |
c. | Reduce into |
d. | Act as a catalyst |
Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and d
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAluminium is extracted from alumina Al2O3 by electrolysis of a molten mixture of:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following metals can be purified by electrolytic refining?
1. Cu, and Zn
2. Ge, and Si
3. Zr, and Ti
4. Zn, and Hg
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct match among the following is:
Column I | Column II |
(a) Boron | (i) Van Arkel method |
(b) Tin | (ii) Mond's process |
(c) Zirconium | (iii) Liquation |
(d) Nickel | (iv) Zone refining |
(a) | (b) | (c) | (d) | |
1. | (iv) | (iii) | (i) | (ii) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (ii) | (i) | (iv) | (iii) |
4. | (iii) | (iv) | (i) | (ii) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat happens in the extraction of chlorine by electrolysis of brine?
1. Oxidation of ion to chlorine gas occurs.
2. Reduction of ion to chlorine gas occurs.
3. For overall reaction has negative value.
4. A displacement reaction takes place.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following metallurgical process:
Sulphide \(\xrightarrow[]{\Delta }\) oxide \(\xrightarrow[]{\Delta }\)
Impure metal \(\xrightarrow[]{\Delta }\) pure metal
The processes A, B, and C in the above mentioned reaction are, respectively:
1. Calcination, smelting, and electrolysis
2. Roasting, smelting, and electrolysis
3. Calcination, auto reduction, and bessemerisation
4. Roasting, aluminothermic reduction, electrolysis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following reactions at 1000 oC.
(I) ZnS + 1/2O2(g) \(\xrightarrow[]{\Delta }\) ZnO(g); ∆Go = -360 kJ mol-1
(II) Cs + 1/2O2(g) \(\xrightarrow[]{\Delta }\) CO(g); ∆Go = -460 kJ mol-1
Choose the correct statement about the above reactions at 1000 oC:
1. ZnO is more stable than CO
2. ZnO can be reduced to Zn by C
3. ZnO, and CO are formed at an equal rate
4. ZnO can not be reduced to Zn by C
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology2MS + 3O2 → 2MO + 2SO2
2MO + MS → 3M + SO2
The metal M in above-mentioned reaction is:
1. Mg
2. Pb
3. Sn
4. Fe
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology