Q7 of 11 Page 53

Can you store lemon pickle in an aluminium utensil? Explain.

Lemon pickle cannot be stored in aluminium utensils because lemon pickle contains acids, which can react with aluminium. Because aluminium is a metal and metals react with acids to liberate hydrogen gas. This can lead to the spoiling of the pickle.


More from this chapter

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5

Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties.

 6

Give reasons for the following.

(a) Aluminium 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 its salt solution.


(d) Sodium and potassium are stored in kerosene.

 8

Match the substances given in Column A with their uses given in Column B.

 9

What happens when

(a) Dilute sulphuric acid is poured on a copper plate?

(b) Iron nails are placed in copper sulphate solution? Write word equations of the reactions involved.