CBSE Class 8 Science - Metals and Non-Metals. Students are advised to refer to the attached assignments and practice them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.
Q.1 Fill in the blanks:
a) Phosphorus is a very _______ non-metal.
b) Metals are _______ conductors of heat and _______.
c) Iron is _______ reactive than copper.
d) Metal reacts with acids to produce _______ gas.
Q.2 Some properties are listed in the following table. Distinguish between metals and nonmetals
on the basis of these properties.
PROPERTIES METALS NON-METALS
7. Conduction of Electricity
Q.3 Give reasons of the following:-
a) Aluminum foils are used to wrap food items.
b) Immersion rods for heating liquids are made up of metallic substances.
c) Copper cannot displace zinc from it’s salt solution.
d) Sodium and potassium are stored in kerosene.
Q.4 Can you store lemon pickle in aluminium utensil? Explain.
Q.5 What happens when:
a) Dilute sulphuric acid is poured in copper plate?
b) Iron nails are placed in copper sulphate solution?
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