MCQ
Hoop's process is used for the purification of the metal
  • $Al$
  • B
    $Zn$
  • C
    $Ag$
  • D
    $Cu$

Answer

Correct option: A.
$Al$
a
(a) Hoop’s process  $⇒$ Purification of $Al$

Hall and Heroult process  $⇒$ Reduction of $A{l_2}{O_3}$

Baeyer’s and Serpeck’s process  $⇒$ Concentration of Bauxite ore

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A molar solution is one that contains one mole of a solute in
To carry out above conversion reagent used in decreasing order.
At $300\, K$ temperature the standard heat of formation of benzoic acid$_{(s)}, CO_2(g)$  and $H_2O_{(l)}$ are $-408, -393$ and $-286\, KJ \,mol^{-1}$ respectively. At constant pressure the heat of combustion for benzoic acid will be .....$ KJ$
Chloro compound of vanadium has only spin magnetic moment of $1.73\, BM$. This vanadium chloride has the formula:
Lithium shows diagonal relationship with
The degree of dissociation of $0.1\,M\,HCN$ solution is $0.01\%$ . Its ionisation constant would be
Rearrange the following ($I $ to $IV $)  in the order of increasing masses and choose the correct answer (Atomic mass: $N=14, O=16, Cu=63$).

$I.$ $1$ molecule of oxygen

$II.$ $1$ atom of nitrogen

$III.$ $1 \times {10^{ - 10}}$ $g$ molecular weight of oxygen

$IV.$ $1 \times {10^{ - 10}}$ $g$ atomic weight of copper

The mass of one hydrogen atom is of the order of
In which of the following octahedral complex species the magnitude of ${\Delta _0}$ will be maximum ?
Equilibrium constants for the following reactions are given (pressure in atm) for the reactions at  $0\,^o C$. Select the option mentioning correct order of True $(T)$ or False $(F)$ statement

$A.6{H_2}{O_{\left( s \right)}} \rightleftharpoons A.2{H_2}{O_{(s)}} + \mathop {4{H_2}{O_{(g)}}};{{K_P} = 1.6 \times {{10}^{ - 11}}} $

$B.12{H_2}{O_{\left( s \right)}} \rightleftharpoons B.7{H_2}{O_{(s)}} + \mathop {5{H_2}{O_{(g)}}};{{K_P} = 2.43 \times {{10}^{ - 13}}} $

$B.10{H_2}{O_{\left( s \right)}} \rightleftharpoons {C_{(s)}} + \mathop {10{H_2}{O_{(g)}}};{{K_P} = {{10}^{ - 30}}} $

Aqueous tension of $H_2O$ at $0\,^oC$ is given as $0.76\  torr$

$(I)$ The most effective drying agent will be $C_{(s)}$. Out of $C_{(s)}$ , $B. 7H_2O_{(s)}$ & $A. 2H_2O_{(s)}$

$(II)$ At $0\,^oC$, $A.6H_2O_{(s)}$ & $B.12H_2O_{(s)}$ will

$(III)$ If $R.H$ is less than $100\%$ in a chamber at $0\,^oC$, then none of the substance can act as deliquescent