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Metals and Non-metals

Exemplar Problems

MCQ 4

Which among the following alloys contain mercury as one of its constituents?

1. Stainless steel
2. Alnico
3. Solder
4. Zinc amalgam
   Answer: (d) Zinc amalgam

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Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

1. Has high melting point
2. Has low melting point
3. Conducts electricity in molten state
4. Occurs as solid
   Answer: (b) Has low melting point

The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?

1. X is a metal
2. Y is a metal
3. Z is a non-metal
4. Y is a non-metal and Z is a metal
   Answer: (d) Y is a non-metal and Z is a metal

Although metals form basic oxides, which of the following metals form an amphoteric oxide?

1. Na
2. Ca
3. Al
4. Cu
   Answer: (c) Al

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

1. Diamond
2. Graphite
3. Sulphur
4. Fullerene
   Answer: (b) Graphite

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Electrical wires have a coating of an insulting material. The material, generally used is

1. Sulphur
2. Graphite
3. PVC
4. All can be used
   Answer: (c) PVC

Which of the following non-metals is a liquid?

1. Carbon
2. Bromine
3. Phosphorus
4. Sulphur
   Answer: (b) Bromine

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Which of the following can undergo a chemical reaction?

1. MgSO₄ + Fe
2. ZnSO₄ + Fe
3. MgSO₄ + Pb
4. CuSO₄ + Fe
   Answer: (d) CuSO₄ + Fe

Which one of the following figures correctly describes the process of electrolytic refining?

Answer: (c)

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