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General Principles and processes of Isolation of Elements
easy
Poling process is used when metal contains
A
Impurities have low melting point.
B
Easily reducible impurities.
C
Volatile impurities.
D
Impurity of metal oxide.
Solution
Poling process is used when metal contains impurity of metal oxide.
Standard 12
Chemistry
Similar Questions
List $-I$ shows reaction involve in metallurgy of $Pb$ (lead) and List $-II$ shows name of processes. Match List $-I$ with List $-II$ and select correct code for your answer
| List $-I$ | List $-II$ |
| $(P)\,PbS + 2PbO\xrightarrow{\Delta }3Pb + S{O_2} \uparrow $ | $(1)$ Smelting |
| $(Q)\,PbS + \frac{3}{2}{O_2}\xrightarrow{\Delta }PbO + S{O_2} \uparrow $ | $(2)$ Self reduction |
| $(R)\,PbC{O_3}\xrightarrow{\Delta }PbO + C{O_2} \uparrow $ | $(3)$ Calcination |
| $(S)\,PbO + C\xrightarrow{\Delta }Pb + CO \uparrow $ | $(4)$ Roasting |
normal
Match list$-I$ with list$-II :$
| list$-I$ | list$-II$ |
|
$(a)$ Mercury |
$(i)$ Vapour phase refining |
| $(b)$ Copper | $(ii)$ Distillation refining |
| $(c)$ Silicon | $(iii)$ Electrolytic refining |
| $(d)$ Nickel | $(iv)$ Zone refining |
Choose the most appropriate answer from the option given below:
