Question

(1) Diamond is the softest natural substance
(3) Electrolysis method is used to obtain pure metals from impure
metals.
(3) Aquaregia is a mixture of conc. HCl and cone HINO, in the
ratio of 1:3.
(4) Corrosion of metals can be stopped by detaching the air from
metals,
(5) Ionic compounds are soluble in kerosene.
(6) Tonic compounds in the solid state conduct electricity
(7) Mercury, silver and gold are very reactive metals.
(8) In electroplating, a metal is coated with another metal using
electrolysis.
(9) Silver plated spoon, gold plated ornaments are the examples
of alloying
(10) Silver amalgam is mainly used by dentists
Aluminium oxide is an acidic oxide.​

Answer 1

Answer:

1. False

2. True

3. True

4. False

5. False

6. False

7. False

8. True

9. True

10.False

11. True