| 1. | In electrolytic refining of copper, the electrolyte used is ? | |
|
CuSO4(s)
|
||
|
Cu(OH)2
|
||
|
CuO
|
||
|
Acidified CuSO4(aq)
|
||
View Answer
Discuss in Forum
Report Question| 2. | Which of the following metals are obtained by electrolysis of their chlorides in molten state ? | |
|
Na and Fe
|
||
|
Na and Ca
|
||
|
Fe and Cu
|
||
|
Na and Cu
|
||
| 3. | Metals are refined by using different methods. which of the following metals are refined by electrolytic refining ? | |
|
Na and K
|
||
|
Cu and Na
|
||
|
Au and Cu
|
||
|
Au and Na
|
||
| 4. | Which one of the following properties is not generally exhibited by ionic compounds ? | |
|
Electrical conductivity in molten state
|
||
|
High melting and boiling points
|
||
|
Electrical conductivity in solid state
|
||
|
Solubility in water
|
||
| 5. | Volatile metals are purified by ? | |
|
Electrolytic refining
|
||
|
Liquation
|
||
|
Distillation
|
||
|
Oxidation
|
||
| 6. | Which of the following is used for making magnets ? | |
|
bronze
|
||
|
duralumin
|
||
|
magnalium
|
||
|
alnico
|
||
| 7. | White phosphorus is stored in ? | |
|
kerosene oil
|
||
|
ether
|
||
|
water
|
||
|
alcohol
|
||
| 8. | The soap can be hardened by ? | |
|
adding animal fat and coconut oil
|
||
|
adding potassium hydroxide
|
||
|
adding sodium carbonate or sodium silicate during its manufacture
|
||
|
adding sodium chloride
|
||
| 9. | Where do the metals which can displace hydrogen from water at room temperature appear in the reactivity series ? | |
|
next to hydrogen
|
||
|
at the bottom
|
||
|
near the top
|
||
|
in the middle
|
||
| 10. | An alloy is ? | |
|
An isomer
|
||
|
A mixture
|
||
|
A element
|
||
|
A metalloid
|
||