MCQ
Anhydrous $AlCl_3$ is formed in
  • A
    $AlC{l_3}.6{H_2}O\xrightarrow{\Delta }$
  • B
    $Al\left( {\operatorname{Re} d\,hot} \right) + HCl\left( {Moist} \right)\xrightarrow{\Delta }$
  • $A{l_2}{O_3} + C + C{l_2}\left( {dry} \right)\xrightarrow{\Delta }$
  • D
    All of these

Answer

Correct option: C.
$A{l_2}{O_3} + C + C{l_2}\left( {dry} \right)\xrightarrow{\Delta }$
c
Hydrated aluminium chloride is formed in $(1)$ and $(2)$

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Dilution processes of different aqueous solutions, with water, are given in LIST-I. The effects of dilution of the solutions on $\left[ H ^{+}\right]$are given in $LIST-II$.

(Note: Degree of dissociation ( $\alpha$ ) of weak acid and weak base is $<<1$; degree of hydrolysis of salt $<<1 ;\left[ H ^{+}\right]$represents the concentration of $H ^{+}$ions)

$LIST-I$ $LIST-II$

$P$ $(10 mL $of  $0.1 M NaOH +20 mL$ $of 0.1 M $  acetic acid) diluted to  $60 mL$

$1$ the value of $\left[ H ^{+}\right]$does not change on dilution

$Q $ $(20 mL $ of $ 0.1 M NaOH +20 mL $of $0.1 M $ acetic acid) diluted to $ 80 mL$

$2$ the value of $\left[ H ^{+}\right]$changes to half of its initial value on dilution the value of $\left[ H ^{+}\right]$changes to two times of its initial value on dilution

$R$ $(20 mL $ of $ 0.1 M HCl +20 mL$of $0.1 M$ ammonia solution) diluted to $80 mL$

$3$ the value of $\left[ H ^{+}\right]$changes to $1 / \sqrt{2}$ times of its initial value on dilution

$S$ $10 mL$ saturated solution of Ni $( OH )_2$in equilibrium with excess

solid  Ni $( OH )_2$ s diluted to  $20 mL$ (solid  Ni $( OH )_2$ is still present afterdilution).

$4$the value of $\left[ H ^{+}\right]$changes to $\sqrt{2}$ times of its initial value on dilution
  $5$ the value of $\left[ H ^{+}\right]$changes to $\sqrt{2}$ times of its initial value on dilution

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