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Byju's Answer

Standard XII

Chemistry

Dissolution of Solids and Gases in Liquid

Which of the ...

Question

Which of the following is/are ionization and not dissociation?

H C l \to H^{+} + C l^{-}

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M g^{+} \to M g^{2 +} + e^{-}

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B r_{2} \to 2 B r^{.}

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H B r \to H^{+} + B r^{-}

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Solution

The correct options are
A $H C l \to H^{+} + C l^{-}$
D $H B r \to H^{+} + B r^{-}$
In dissociation separation of ions take place which are already present as ions in the solid state. For example in the crystal structure of $N a C l$ , $N a C l$ is present as $N a$ and $C l$ .
In ionization, splitting of a neutral molecule into ions which are charged happen.
$H C l$ and $H B r$ are neutral $μ$ , there is no charge separation. But in solution they get ionised.

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Similar questions

Q. Consider the following orderings:

I

A l > S i > P > C l

I I

B e < M g < C a < S r

I I I

I < B r < C l < F

I V

{N a}^{+} < {M g}^{2 +} < {A l}^{3 +} < {S i}^{4 +}

Which of these give(s) a correct trend in ionization energy?

Q. Which of the following options does not give to the correct trends indicated against it?
(I)

F_{2} > C l_{2} > B r_{2} > I_{2}

: Bond dissociation energy
(II)

F_{2} > C l_{2} > B r_{2} > I_{2}

: Oxidizing nature
(III)

C l > F > B r > I

: Electron gain enthalpy
(IV)

F > C l > B r > I

: Electronegativity

Complete:

$(a) N a^{-} . . . . . . . . . . . \to N a^{+} (b) N + . . . . . . . . . . . \to N^{3 -} (c) C l + e^{-} \to . . . . . . . . . . . (d) M g - . . . . . . . . . . . \to M g^{2 +} (e) M + H C l \to M C l_{2} + . . . . . . . . . . . (f) M g + H_{2} S O_{4} \to . . . . . . . . . . . + . . . . . . . . . . .$

Fill in the blank (do not have to balance):
$M g O + H C l \to$ __________

Arrange the following in the order of property indicated for each set:

$F_{2}, C l_{2}, B r_{2}, I_{2}$ - increasing bond dissociation enthalpy.

HF,HCl, HBr, HI- Increasing acid strength.

$N H_{3}, P H_{3}, A s H_{3}, S b H_{3}, B i H_{3}$ - increasing base strength.

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