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Physical Properties of Metals

You can make ...

Question

You can make a copper wire but not a coal wire. It is because:

A

Copper is malleable but coal is not.

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B

Copper is ductile but coal is not.

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C

Copper is sonorous but coal is not.

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D

when coal is tried to turn into wire, it start burning.

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Solution

The correct option is B
Copper is ductile but coal is not.

There is a copper wire but not a coal wire. It is because copper is ductile hence can be drawn into wire without being broken but coal being non-metal is not ductile. Hence, when coal is tried to turn into wire, it breaks down.

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Similar questions

Q. The property/properties which enable copper metal to be used for making electric wires is / are :
(a) copper metal is malleable and ductile
(b) copper metal is a good conductor of electricity
(c) copper metal is ductile and has low electrical resistance
(d) copper metal is sonorous and an excellent conductor of electricity

Q. Copper can he extracted by hydrometallurgy but not zinc because:

Q. Fill in the blanks using suitable words.
(a) A thick glass tumbler is taken. Boiling hot water is poured into it. The hot water is in contact with the ______________ layer of glass. By ______________ this layer becomes hot and _____________. Glass is a ______________conductor of heat. Thus the _______________ layer does not get heated quickly. It does not ________________ as much. This ______________ expansion of the layers causes the glass to crack.
(b) Burning coal is kept on a muslin cloth which is spread out on a copper plate. Copper is a ______________ conductor of ______________. It takes away the heat from the ______________. The ______________ of the muslin cloth does not rise enough for it to catch fire.
(c) Rajesh opened a gas tap on the kitchen range. he held a piece of wire netting above it and struck a match below the wire netting. He found the gas burnt below the wire netting but not aove it. the wire netting is made of _______________ which is a good ______________ of heat. It takes away the heat from the fire. Thus the _____________ above the netting did not catch fire.

You can make a copper wire but not a coal wire. It is because:

burning the coal yields energy , but if we try to eat coal we will not get any energy. why?

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