Give a reason for the following: Silver is used for making mirrors.

Silver is a white lustrous metal with high reflecting power. That is why it is used for making mirrors.

Give reasons for the following: Aluminium is used to make electrical wires.

Aluminium is used for making electrical wires because it is a good conductor of electricity and inexpensive. Aluminium is ductile in nature so that it can easily be drawn into wires.

Give a reason for the following: Iron is used in constructing bridges and houses.

Iron is very hard, tough, malleable and considerably durable. It has the ability to be moulded into various shapes. Being very strong, it can withstand large amounts of loads. That is why it is used in constructing bridges and houses.

E M B I B E

Innovative Chemistry>Chapter 7 - Metals and Non-Metals>EVALUATE YOUR UNDERSTANDING>Q V

HARD

7th ICSE

IMPORTANT

Earn 100

From the characteristics given below, select the five which are relevant to non-metals and their compounds.

Ductile, Conduct electricity, Brittle, Acidic oxides, Basic oxides, Malleable, Low melting point, Non-malleable, Low boiling point, High melting point.

Important Questions on Metals and Non-Metals

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 7 - Metals and Non-Metals>EVALUATE YOUR UNDERSTANDING>Q 1

Give a reason for the following:

Silver is used for making mirrors.

EASY

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 7 - Metals and Non-Metals>EVALUATE YOUR UNDERSTANDING>Q 1

Give reasons for the following:

Aluminium is used to make electrical wires.

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 7 - Metals and Non-Metals>EVALUATE YOUR UNDERSTANDING>Q 1

Give a reason for the following:

Iron is used in constructing bridges and houses.

HARD

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 7 - Metals and Non-Metals>EVALUATE YOUR UNDERSTANDING>Q 1

Complete the concept map:

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HARD

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 7 - Metals and Non-Metals>EVALUATE YOUR UNDERSTANDING>Q 2

In the following four tubes marked A to D contains metals. In each tube, $5 ml$ of dilute hydrochloric acid is added. Identify the metals in each tube.

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