Choose the statement that is true about A,B a | vedclass

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(B) $1$. Naphthalene is a neutral organic compound,while tetrahydroisoquinoline is a basic amine.$2$. When treated with $HCl$,the basic tetrahydroisoq

Vedclass · Accepted Answer

$A =$ naphthalene,$B =$ tetrahydroisoquinoline and $C =$ inorganic ions such as $Na^{+}$ and $Cl^{-}$

Vedclass · Answer

(B) $1$. Naphthalene is a neutral organic compound,while tetrahydroisoquinoline is a basic amine.$2$. When treated with $HCl$,the basic tetrahydroisoquinoline reacts to form a water-soluble salt (tetrahydroisoquinolinium chloride),which enters the aqueous layer.$3$. Naphthalene remains in the diethyl ether layer. Evaporation of the ether layer yields $A =$ naphthalene.$4$. The aqueous layer contains the salt of the amine. Adding $NaOH$ makes the solution basic,converting the salt back to the free base (tetrahydroisoquinoline),which is organic-soluble and moves into the ether layer.$5$. Evaporation of this second ether layer yields $B =$ tetrahydroisoquinoline.$6$. The remaining aqueous layer contains inorganic salts like $NaCl$ formed during the neutralization. Evaporation of this layer yields $C =$ inorganic ions such as $Na^{+}$ and $Cl^{-}$.

Column-$I$	Column-$II$
$A$. Two solids which have different solubilities in a solvent and which do not undergo reaction when dissolved in it	$1$. Crystallisation
$B$. Liquid that decomposes at its boiling point	$2$. Distillation under reduced pressure
$C$. Steam volatile liquid	$3$. Steam distillation
$D$. Two liquids which have boiling points close to each other	$4$. Fractional distillation
$E$. Two liquids with large difference in boiling points	$5$. Simple distillation

Item $I$	Item $II$
$a$. Benzaldehyde	$p$. Mobile phase
$b$. Alumina	$q$. Adsorbent
$c$. Acetonitrile	$r$. Adsorbate

List-$I$	List-$II$
$A$. Coloured impurity	$P$. Steam distillation
$B$. Mixture of $o$-nitrophenol and $p$-nitrophenol	$Q$. Fractional distillation
$C$. Crude oil	$R$. Charcoal treatment
$D$. Mixture of glycerol and sugars	$S$. Distillation under reduced pressure

Choose the statement that is true about $A$,$B$ and $C$ in the following separation scheme.

Similar Questions

Give the difference between paper chromatography and thin layer chromatography.

Write the applications of chromatography.

The correct match between Item $I$ and Item $II$ is

Item $I$ Item $II$

$a$. Benzaldehyde $p$. Mobile phase

$b$. Alumina $q$. Adsorbent

$c$. Acetonitrile $r$. Adsorbate

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