School Quizzes

Maharashtra State Board School Quizzes

Quiz on Metals and Non-Metals (General Science)

Vincent Augustine D'Souza

Standard Eight Science

1. Why is copper used for electrical wiring in our houses?

Copper is beautiful.
Copper does not rust.
Copper is a good conductor.
Copper is plenty.
Correct Answer: Copper is a good conductor.

2. Why does a copper vessel shine again after scrubbing?

Copper has lustre.
Stars shine on copper.
Copper is transparent.
Copper has glow.
Correct Answer: Copper has lustre.

3. What is meant by corrosion?

Two metals joining together.
Gases reacting with metals to produce compounds of metals.
Mixing of two non-metals.
Extraction of metals from mines.
Correct Answer: Gases reacting with metals to produce compounds of metals.

4. Why are ornaments generally not made from 24-carat gold?

To save money.
They become heavy.
They shine too much.
Ornaments of pure gold break or get bent easily.
Correct Answer: Ornaments of pure gold break or get bent easily.

5. Why are ships painted at frequent intervals?

To prevent corrosion of metal sheets by sea water.
To keep painters employed.
To repel whales.
To repel sharks.
Correct Answer: To prevent corrosion of metal sheets by sea water.

6. Why are gold and platinum called noble elements?

Noble persons use them.
They are not affected by air, water, acids, heat etc.
They are used in making coins.
They are used in making medals.
Correct Answer: They are not affected by air, water, acids, heat etc.

7. What are properties of metals?

Unity and indissolubility.
Transparency and translucency.
Lustre, malleability, ductility, conductivity etc.
Theatres, malls, stadia etc.
Correct Answer: Lustre, malleability, ductility, conductivity etc.

8. Which metal is used in thermometer?

Radium
Plutonium
Uranium
Mercury
Correct Answer: Mercury

9. Which is an alloy of iron, carbon, nickel, chromium?

Stainless steel
Steel
Sulphur
Graphite
Correct Answer: Stainless steel

10. Which metals are contained in bronze?

silver and gold
copper and zinc
copper and tin
silver and copper
Correct Answer: copper and tin

11. Which gas is released when metals react chemically with acids?

nitrogen
hydrogen
oxygen
carbon
Correct Answer: hydrogen

12. What is formed when a metal combines with oxygen?

sulphide
chloride
bromide
oxide
Correct Answer: oxide

13. Which non-metal is used in gun powder?

coal
graphite
chlorine
sulphur
Correct Answer: sulphur

Originally posted 2015-11-24 11:25:48.