Question

(0) Cou
(a) blue to colourless
(c) blue to green
(d) green to blue
3. Name one metal and one non-metal which exists in liquid state at room temperature.

4. Name nivo non-metals which both are brittle and non-ductile.

5. Name the metal which is used for galvanising iron.
0. Explain why anode mud in copper refining contains silver and gold.
• Can we store concentrated solution of sodium hydroxide in zinc container? Explain

8. Give reasons for the following:
(i) Carbon is not used for extracting aluminium from aluminium oxide.
(ii) Copper is used in making electrical circuits but not the alloys brass and bronze.

9. Give reasons why copper is used to make hot water tanks but steel (an alloy of iron) is not?

10. Why is titanium called strategic metal ? Mention two of its properties which makes it so special.

11. On placing a piece of zinc metal in a solution of mercury chloride, it acquires a silvery surface but when it is place
in a solution of magnesium sulphate no change is observed. State the reason for the behaviour of zinc metall

12. Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines. What is the price
called ?​

Answer 1

Answer:

3 metal is Mercury and non metal is bromine