Chemistry, 17.11.2020 08:50 jonellelewis2897

A. Which non-metal is essential for our life and all living beings inhale it during breathing? B. Whichnon-metal is used to disinfect water?

2.A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.

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)Sodium and potassium are stored in kerosene.

4. What is the nature (acidic or basic )of the following oxides ?a. Magnesium oxide (b) Sulphur dioxideGive reason foryour choice.

5. When a copper metal is exposed to moist air for a long time, then a green coating is formed on its surface .What is the green material formed on its surface. Support your answer with word equation. Is it acidic or basic in nature.

PLEASE HELP ME

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