Question

Give name for a molten metal that catches fire in chlorine gas and gives off white fumes?
Which metals do not corrode easily?
What are alloys?
Give name for a metal that forms two types of oxides and rusts in moisture; write their formulae also
Name two metals which can displace hydrogen from dilute HCI.
Give name for a metal used in hot water systems
Metals replace hydrogen from acid, whereas non-metals do not. Why?
Are metals electronegative or electropositive?
Give name for a metal used in long distance cables wires
Give name for a metal added to gold to harden it
Name the metal which occurs below copper in the reactivity series. Also name the metal that lies just above hydrogen in the reactivity series
Name a metal used in structural engineering
Name a metal used as fuse wire
Name a brittle metal, which is used to galvanize iron
Name a non-metal which is hard and has high melting point.
Name a metal whose chloride and sulphate salts are both insoluble
Name a metallic chloride that is soluble in hot water but insoluble in cold water.
Arrange the following metals in the decreasing order of chemical reactivity; placing the most active first. Cu, Mg, Fe, Na, Ca, Zn.​

Answer 1

Explanation:

1. sodium

2. aluminium

3. mixture of 2 or more metals

4. zinc

5. lesser reactive metals than hydrogen

6. iron

7. it dissolved h+ions

8.positive

9. copper

10. steel

11.mercury

12. iron

13. copper

14.zinc

15.diamond

16. sodium

17.mg na ca Zn fe cu

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