Metals and Non-Metals

Which statement is true about non-metals?

1. They are generally good conductors
2. They are usually malleable
3. They generally form negative ions
4. They are always shiny

Which of the following metals is least reactive?

1. Potassium
2. Sodium
3. Gold
4. Magnesium

What happens when iron is exposed to moist air for a long time?

1. It forms rust
2. It melts
3. It evaporates
4. It becomes a non-metal

Which metal is extracted by electrolytic reduction?

1. Sodium
2. Iron
3. Copper
4. Zinc

Which of the following is an alloy?

1. Oxygen
2. Brass
3. Sulphur
4. Carbon

Which metal reacts vigorously with cold water?

1. Gold
2. Sodium
3. Copper
4. Silver

Which metal is used for making electrical wires because of its high conductivity and ductility?

1. Copper
2. Sodium
3. Calcium
4. Magnesium

Which process is used to obtain metals from their ores?

1. Extraction
2. Filtration
3. Evaporation
4. Condensation

What type of oxide is generally formed when metals react with oxygen?

1. Acidic oxide
2. Basic oxide
3. Neutral oxide
4. Organic oxide

Which metal is the best conductor of electricity?

1. Iron
2. Silver
3. Lead
4. Mercury

Which gas is released when a metal reacts with dilute hydrochloric acid?

1. Oxygen
2. Nitrogen
3. Hydrogen
4. Carbon dioxide

Which of the following metals is stored in kerosene oil?

1. Iron
2. Copper
3. Sodium
4. Aluminium

Which of the following is a physical property of metals?

1. They are generally brittle
2. They are good conductors of heat and electricity
3. They have low melting points
4. They are dull in appearance

Why are alloys generally preferred over pure metals for industrial applications?

1. They are always cheaper
2. They have improved properties such as strength and corrosion resistance
3. They are non-conductors of electricity
4. They cannot be shaped

Why are highly reactive metals generally extracted by electrolysis?

1. They have low melting points
2. Chemical reduction is ineffective for highly reactive metals
3. They do not form compounds
4. They are found in pure form

What is corrosion?

1. Formation of alloys
2. Gradual destruction of metals by chemical reactions
3. Extraction of metals from ores
4. Purification of metals

Which metal is extracted from bauxite ore?

1. Iron
2. Aluminium
3. Copper
4. Silver

Which property makes metals suitable for electrical wiring?

1. Brittleness
2. Conductivity
3. Softness
4. Transparency

What is the nature of oxides formed by most metals?

1. Acidic
2. Neutral
3. Basic
4. Organic

Which of the following is a non-metal?

1. Copper
2. Aluminium
3. Carbon
4. Zinc

Which gas is produced when a metal reacts with a dilute acid?

1. Oxygen
2. Nitrogen
3. Hydrogen
4. Carbon dioxide

Which property allows metals to be beaten into thin sheets?

1. Ductility
2. Malleability
3. Sonority
4. Brittleness

Which of the following is a metal?

1. Sulphur
2. Oxygen
3. Iron
4. Phosphorus