MCQ
In the extraction of aluminium the electrolyte is
- AFused cryolite with felspar
- BFused cryolite with fluorspar
- ✓Pure alumina in molten cryolite
- DPure alumina with bauxite and molten cryolite
✓
Answer
Correct option: C.
Pure alumina in molten cryolite
c
It’s Obvious.
It’s Obvious.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
From the solution of which of the following one faraday of electricity will liberate one gram atom of metal
- In the reaction
$2 {X}+\mathrm{B}_2 \mathrm{H}_6 \rightarrow\left\lfloor\mathrm{BH}_2(\mathbf{X})_2\right\rfloor^{+}\left\lfloor\mathrm{BH}_4\right]^{-}$ the amine(s) ${X}$ is$(are)$
$(A)$ $\mathrm{NH}_3$ $(B)$ $\mathrm{CH}_3 \mathrm{NH}_2$ $(C)$ $\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$ $(D)$ $\left(\mathrm{CH}_3\right)_3 \mathrm{~N}$
The ascending acidity order of the following H atoms is
For the equilibrium $A\left( g \right) \rightleftharpoons B\left( g \right)$, $\Delta H$ is $-40\, k\,J/mol$. If the ratio of the activation energies of the forward $(E_f)$ and reverse $(E_b)$ reactions is $\frac{2}{3}$ then
→A flask contains a mixture of compounds $A$ and $B.$ Both compounds decompose by first-order kinetics. The half-lives for $A$ and $B$ are $300$ $s$ and $180\, s ,$ respectively. If the concentrations of $A$ and $B$ are equal initially, the time required for the concentration of $A$ to be four times that of $B ($ in $s ):$ (Use $\ln 2=0.693)$
→
The reagent $(s)$ which can be used to distinguish acetophenone from benzophenone is (are)
→Activation energy is
The magnetic moment of a complex ion is $2.83\, BM$, the complex ion is
→Assertion : $PbCl_2$ is more stable than $PbCl_4$.
→Reason : $PbCl_4$ is powerful oxidising agent.
$1000\, mL$ $1\, M$ $CuSO_4(aq)$ is electrolysed by $9.65\, amp$ current for $100\, sec$ using $Pt-$ electrode. Which is incorrect statemenet?
→