JEE Main Chemistry – p-Block Elements Important Questions, MCQs & Practice Tests

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Q 1 :

A student added aqueous chlorine to aqueous sodium bromide and the resulting mixture was shaken with an equal volume of trichloroethane.

Which diagram best represents the observation made?

[IMAGE 75]
[IMAGE 76]
[IMAGE 77]
[IMAGE 78]

(4)

[IMAGE 79]

${Cl}_{2} + 2 NaBr \to {Br}_{2} + 2 NaCl$

${Cl}_{2} oxidises {Br}^{-}$ to ${Br}_{2}$ in trichloroethane and is reddish brown in colour. Two layers are observed as trichloroethane is immiscible with water.

Q 2 :

Match the Column – I and Column – II

Column – I Column – II

A) Hypophosphoric acid P) All hydrogens are ionizable in water

B) Pyrophosphoric acid Q) Lewis acid

C) Boric acid R) Monobasic acid

D) Hypophosphorous acid S) $s p^{3}$ hybridized central atom

A-PS; B-PS; C-QR; D-RS
A-QR; B-PS; C-PQ; D-RS
A-PS; B-QR; C-RS; D-S
A-QS; B-PR; C-PQ; D-P

(1)

Q 3 :

Which one of the following orders is not in accordance with the property stated against it?

$F > C l > B r > I$ : Electronegativity
$F_{2} > C l_{2} > B r_{2} > I_{2}$ : Bond dissociation energy
$F_{2} > C l_{2} > B r_{2} > I_{2}$ : Oxidizing power
$H I > H B r > H C l > H F$ : Acidic strength

(2)

(b) Bond dissociation energy order

$\begin{matrix} {Cl}_{2} & > & {Br}_{2} & > & F_{2} & > & I_{2} \\ 242.6 & 192.8 & 158.8 & 151.1 \end{matrix} \begin{matrix} kJ/mol \end{matrix}$

Topic Question Set

Q 1 :

A student added aqueous chlorine to aqueous sodium bromide and the resulting mixture was shaken with an equal volume of trichloroethane.

Which diagram best represents the observation made?

Q 2 :

Match the Column – I and Column – II

Column – I Column – II

A) Hypophosphoric acid P) All hydrogens are ionizable in water

B) Pyrophosphoric acid Q) Lewis acid

C) Boric acid R) Monobasic acid

D) Hypophosphorous acid S) $s p^{3}$ hybridized central atom

(1)

Q 3 :

Which one of the following orders is not in accordance with the property stated against it?

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	Column – I		Column – II
A)	Hypophosphoric acid	P)	All hydrogens are ionizable in water
B)	Pyrophosphoric acid	Q)	Lewis acid
C)	Boric acid	R)	Monobasic acid
D)	Hypophosphorous acid	S)	$s p^{3}$ hybridized central atom

Topic Question Set

Q 1 : A student added aqueous chlorine to aqueous sodium bromide and the resulting mixture was shaken with an equal volume of trichloroethane. Which diagram best represents the observation made?

Q 2 : Match the Column – I and Column – II Column – I Column – II A) Hypophosphoric acid P) All hydrogens are ionizable in water B) Pyrophosphoric acid Q) Lewis acid C) Boric acid R) Monobasic acid D) Hypophosphorous acid S) sp3 hybridized central atom

(1)

Q 3 : Which one of the following orders is not in accordance with the property stated against it?

Want Us to Email you About Special Offers & Updates?

Q 1 :

A student added aqueous chlorine to aqueous sodium bromide and the resulting mixture was shaken with an equal volume of trichloroethane.

Which diagram best represents the observation made?

Q 2 :

Match the Column – I and Column – II

Column – I Column – II

A) Hypophosphoric acid P) All hydrogens are ionizable in water

B) Pyrophosphoric acid Q) Lewis acid

C) Boric acid R) Monobasic acid

D) Hypophosphorous acid S) $s p^{3}$ hybridized central atom

Q 3 :

Which one of the following orders is not in accordance with the property stated against it?