Mizoram Board Solutions for Chapter: Metals and Non-metals, Exercise 6: EXERCISES

Which of the following pairs will give displacement reactions?

Which of the following methods is suitable for preventing an iron frying pan from rusting?

Food cans are coated with tin and not with zinc because-

Give reasons-
Carbonate and sulphide ores are usually converted into oxides during the process of extraction.

You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.

Differentiate between metal and non-metal based on their chemical properties.

A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a solution. The bangles sparkled like new, but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?

Give reasons-

Why copper is used to make hot water tanks and not steel (an alloy of iron)?