A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z. [3 MARKS]

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Solution

Each identification: 1 Mark

X is carbon. It is a non-metal.
Y is diamond. It is the hardest natural substance and an exception among non-metals because of this property.
Z is graphite. It is a non-metal but a good conductor of electricity.

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A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.

Q. A non-metal

X

exists in two different forms

Y

and

Z

Y

is the hardest natural substance whereas

Z

is a good conductor of electricity.

Y

is :

Name the following :

(a) The hardest naturally occurring substance.

(b) A greyish black non-metal that is a good conductor of electricity.

Q. A non-metal X is an important constituent of our food. It forms two oxides Y and Z. Y is toxic and causes suffocation and even death while Z is responsible for global warming. Identify X, Y and Z.

Metal X is used in the process of galvanisation. Metal Y is used to make household electrical wires. Metal X and metal Y combine to form alloy Z. Identify X, Y and Z.

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A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z. [3 MARKS]

Each identification: 1 Mark X is carbon. It is a non-metal. Y is diamond. It is the hardest natural substance and an exception among non-metals because of this property. Z is graphite. It is a non-metal but a good conductor of electricity.

Each identification: 1 Mark

X is carbon. It is a non-metal.
Y is diamond. It is the hardest natural substance and an exception among non-metals because of this property.
Z is graphite. It is a non-metal but a good conductor of electricity.