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Standard XII

Chemistry

PTFE

which have gr...

Question

which have greaer solubility in ccl4 options cl2, br2 , i2 , NACL . WHY

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Q. Assertion :

{C l}_{2}

{B r}_{2}

changes

K I

into

I_{2}

(violet in

{C C l}_{4}

layer),

{C l}_{2}

changes

K B r

into

{B r}_{2}

(orange-yellow in

{C C l}_{4}

layer). Thus,

{C l}_{2}

would change mixture of

K I a n d K B r

into violet layer in

{C C l}_{4}

. Reason: Oxidising power is in order

I_{2} < {B r}_{2} < {C l}_{2} < F_{2}

The correct order of the oxidizing power of Cl₂, Br₂, I₂ and O₂ is:

Q. Assertion :In organic layer test ,

C l_{2}

water is added to the sodium extract which oxidizes

B r^{θ}

and

I^{θ}

ions to

B r_{2}

and

I_{2}

respectively. Reason: Reduction potential of

C l_{2}

is greater than that of

B r_{2}

and

I_{2}

Q. Consider the following orders –
(1)

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

boiling point
(2)

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

oxidizing nature
(3)

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

EN
(4)

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

BDE
(5)

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

EA
(6)

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

Reactivity
(7)

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

Acidic nature
(8)

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

Oxidizing nature
Then calculate

(x^{2} + y^{2})

when

x

is correct order and

y

is incorrect order.

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

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