Properties of Materials: Sonority, Conduction, Ductility and Brittleness: 28 MCQs with answers

Sonority

Sonority is the property of metals that enables them to produce a ringing sound when struck.

Coal produces a dull sound; the coin rings

Metals are sonorous and ring when struck, while coal produces a dull sound.

Conduction

Conduction is the transfer of heat from one point to another within a material.

The metal spoon

The metal spoon becomes hotter because metals are good conductors of heat, while wood is a poor conductor.

Rubber eraser

Rubber is an insulator and does not conduct electricity, while copper, iron and aluminium are metals that conduct.

Ductility

Ductility is the property by which materials can be drawn into wires, and it is mainly possessed by metals.

True

Sonority is the property of metals that makes them produce a ringing sound when struck; coal and wood produce dull sounds instead.

Sonority

Sonority is the specific property of materials, particularly metals, that enables them to produce a ringing sound when struck.

Metal

Metals are known to be good conductors of heat, allowing heat to travel quickly through them.

Ductility

Ductility refers to a material's ability to be drawn into thin wires, which is a characteristic of most metals.

Rubber

Rubber is a poor conductor of electricity, making it an effective insulator.

Dull thud

Wood produces a dull thud when struck, unlike metals which produce a ringing sound.

Wood does not conduct heat well

Wood is used for handles because it is a poor conductor of heat, preventing the handle from becoming hot.

Copper

Copper is highly ductile and can be drawn into thin wires, making it suitable for electrical applications.

Conduction

Conduction is the process by which heat is transferred within a material.

It breaks into pieces when hit

Brittle materials break into pieces when subjected to force, unlike ductile or malleable materials.

Metal bell

A metal bell rings when struck due to its sonorous property, while wood and plastic do not.

Wood is a poor conductor of heat

Wood is a poor conductor of heat, so the handle stays cool and can be held safely.

Rubber does not conduct electricity

Rubber is a poor conductor (insulator) of electricity, so it protects the electrician from shocks.

It is a conductor of electricity

If the bulb glows, the material conducts electricity and is a conductor.

Metal wires

Metal wires are used as strings in these instruments because metals are ductile and can be drawn thin while holding tension.

About 2 kilometres

Gold is extremely ductile — one gram of it can be drawn into a wire about 2 kilometres long.

Brittleness

Materials like coal and sulfur that break into pieces when hit are said to be brittle.

Wood is neither malleable nor brittle

Wood neither gets flattened into a sheet nor breaks into pieces, so it is neither malleable nor brittle.

Copper occurs in native form while iron is usually found in ores

Copper occurs in native (pure) form in nature, whereas iron is usually found combined with oxygen in ores and needs more complex processing.

Only metals are sonorous; shine does not make a material ring

Shine is not the same as sonority. Only metals ring when struck; a shiny plastic bell will not ring.

The property of sonority in metals allows them to produce a ringing sound when struck, unlike wood.

The correct option is based on the property of sonority, which is inherent to metals and allows them to produce a ringing sound when struck, while wood does not have this property.

The metal body allows for quick heat transfer to cook food, while the wooden handle prevents heat transfer to avoid burns.

The correct option highlights the functional properties of materials: the metal conducts heat efficiently for cooking, while the wooden handle acts as a poor conductor, protecting the user from heat.