Question

displacement reaction is based on

reactivity of metal

reactivity of salt

both

none of the above

Required

4. redox reaction is composition of

reduction reaction

oxidation reaction

both

none of the above

Required

5. corrosion can be prevented by

painting

greasing

zinc polish

all of the above

Required

6. oily and fatty substance in packets are flushed with

nitrogen and oxygen

nitrogen and helium

nitrogen and hydrogen

nitrogen and carbon dioxide

Required

7. metal react with oxygen and forms their

oxides

carbonate

nitrate

bicarbonate

Required

8. dissociation reaction is of ______ type

1

2

3

4

Required

9. metal can displace another metal in metal salt due to its

high concentration

high reactivity

less reactivity

none of the above

Required

10. when oily and fatty compound react with oxygen of air then this phenomenon is called

corrosion

rancidity

rusting

none of the above

11. Reaction of 'magnesium' with air is

Exothermic

endothermic

Reversible

Reduction

Required

12. When a magnesium ribbon is burnt in air, the ash formed is

Black

white

yellow

pink

Required

13. Color of magnesium oxide is

White

Black

Blue

Green

Required

14. Color of Solid magnesium is

Brown grey

silver gray​

Answer 1

Answer:

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