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11. THE P-BLOCK ELEMENTS

190010 The product obtained when silica reacts with hydrogen fluoride is

1

S i F_{4}

2

H_{2} S i F_{6}

3

H_{2} S i F_{4}

4

H_{2} S i F_{3}

Explanation:

The final product formed when silica $({SiO}_{2})$ reacts with hydrogen fluoride $(HF)$ is $H_{2} {SiF}_{6} .$
The reactions are as follows:
${SiO}_{2} + 4 HF \to {SiF}_{4} + 2 H_{2} O$
$3 {SiF}_{4} + 4 H_{2} O \to 2 H_{2} {SiF}_{6} + H_{4} {SiO}_{4}$

11. THE P-BLOCK ELEMENTS

190011 Group $13$ elements show $+ 1$ and $+ 3$ oxidation states. Relative stability of $+ 3$ oxidation state may be given as

1

T l^{3 +} > I n^{3 +} > G a^{3 +} > A l^{3 +} > B^{3 +}

2

B^{3 +} > A l^{3 +} > G a^{3 +} > I n^{3 +} > T l^{3 +}

3

A l^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +} > B^{3 +}

4

A l^{3 +} > B^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +}

Explanation:

Stability of $+ 3$ oxidation state decreases from $A l$ to $T l$ . $B$ always shows $+ 3$ oxidation state in all of its compounds

11. THE P-BLOCK ELEMENTS

190012 $B C l_{3} + H_{2} O ⟶$ Product, here product

1

H_{3} B O_{3} + H C l

2

B_{2} O_{3} + H O C l

3

B_{2} H_{6} + H C l

4

B_{2} O_{3} + H C l

Explanation:

$B C l_{3} + 3 H_{2} O \to H_{3} B O_{3} + 3 H C l$
The products formed in the reaction are $H_{3} B O_{3} + 3 H C l$ .

11. THE P-BLOCK ELEMENTS

190013 Which of the following order is correct ?

1

S i - S i > C - C > G e - G e

(Bond energy)

2

H - H > F - F > C - C

(Bond energy)

3

G e < S n < P b

(ability of

n s^{2} e^{-}

to participate in bonding)

4

S i H_{4} > S n H_{4} > P b H_{4} > C H_{4}

(easy of hydrolysis)

11. THE P-BLOCK ELEMENTS

190010 The product obtained when silica reacts with hydrogen fluoride is

1

S i F_{4}

2

H_{2} S i F_{6}

3

H_{2} S i F_{4}

4

H_{2} S i F_{3}

Explanation:

The final product formed when silica $({SiO}_{2})$ reacts with hydrogen fluoride $(HF)$ is $H_{2} {SiF}_{6} .$
The reactions are as follows:
${SiO}_{2} + 4 HF \to {SiF}_{4} + 2 H_{2} O$
$3 {SiF}_{4} + 4 H_{2} O \to 2 H_{2} {SiF}_{6} + H_{4} {SiO}_{4}$

11. THE P-BLOCK ELEMENTS

190011 Group $13$ elements show $+ 1$ and $+ 3$ oxidation states. Relative stability of $+ 3$ oxidation state may be given as

1

T l^{3 +} > I n^{3 +} > G a^{3 +} > A l^{3 +} > B^{3 +}

2

B^{3 +} > A l^{3 +} > G a^{3 +} > I n^{3 +} > T l^{3 +}

3

A l^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +} > B^{3 +}

4

A l^{3 +} > B^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +}

Explanation:

Stability of $+ 3$ oxidation state decreases from $A l$ to $T l$ . $B$ always shows $+ 3$ oxidation state in all of its compounds

11. THE P-BLOCK ELEMENTS

190012 $B C l_{3} + H_{2} O ⟶$ Product, here product

1

H_{3} B O_{3} + H C l

2

B_{2} O_{3} + H O C l

3

B_{2} H_{6} + H C l

4

B_{2} O_{3} + H C l

Explanation:

$B C l_{3} + 3 H_{2} O \to H_{3} B O_{3} + 3 H C l$
The products formed in the reaction are $H_{3} B O_{3} + 3 H C l$ .

11. THE P-BLOCK ELEMENTS

190013 Which of the following order is correct ?

1

S i - S i > C - C > G e - G e

(Bond energy)

2

H - H > F - F > C - C

(Bond energy)

3

G e < S n < P b

(ability of

n s^{2} e^{-}

to participate in bonding)

4

S i H_{4} > S n H_{4} > P b H_{4} > C H_{4}

(easy of hydrolysis)

11. THE P-BLOCK ELEMENTS

190010 The product obtained when silica reacts with hydrogen fluoride is

1

S i F_{4}

2

H_{2} S i F_{6}

3

H_{2} S i F_{4}

4

H_{2} S i F_{3}

Explanation:

The final product formed when silica $({SiO}_{2})$ reacts with hydrogen fluoride $(HF)$ is $H_{2} {SiF}_{6} .$
The reactions are as follows:
${SiO}_{2} + 4 HF \to {SiF}_{4} + 2 H_{2} O$
$3 {SiF}_{4} + 4 H_{2} O \to 2 H_{2} {SiF}_{6} + H_{4} {SiO}_{4}$

11. THE P-BLOCK ELEMENTS

190011 Group $13$ elements show $+ 1$ and $+ 3$ oxidation states. Relative stability of $+ 3$ oxidation state may be given as

1

T l^{3 +} > I n^{3 +} > G a^{3 +} > A l^{3 +} > B^{3 +}

2

B^{3 +} > A l^{3 +} > G a^{3 +} > I n^{3 +} > T l^{3 +}

3

A l^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +} > B^{3 +}

4

A l^{3 +} > B^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +}

Explanation:

Stability of $+ 3$ oxidation state decreases from $A l$ to $T l$ . $B$ always shows $+ 3$ oxidation state in all of its compounds

11. THE P-BLOCK ELEMENTS

190012 $B C l_{3} + H_{2} O ⟶$ Product, here product

1

H_{3} B O_{3} + H C l

2

B_{2} O_{3} + H O C l

3

B_{2} H_{6} + H C l

4

B_{2} O_{3} + H C l

Explanation:

$B C l_{3} + 3 H_{2} O \to H_{3} B O_{3} + 3 H C l$
The products formed in the reaction are $H_{3} B O_{3} + 3 H C l$ .

11. THE P-BLOCK ELEMENTS

190013 Which of the following order is correct ?

1

S i - S i > C - C > G e - G e

(Bond energy)

2

H - H > F - F > C - C

(Bond energy)

3

G e < S n < P b

(ability of

n s^{2} e^{-}

to participate in bonding)

4

S i H_{4} > S n H_{4} > P b H_{4} > C H_{4}

(easy of hydrolysis)

11. THE P-BLOCK ELEMENTS

190010 The product obtained when silica reacts with hydrogen fluoride is

1

S i F_{4}

2

H_{2} S i F_{6}

3

H_{2} S i F_{4}

4

H_{2} S i F_{3}

Explanation:

The final product formed when silica $({SiO}_{2})$ reacts with hydrogen fluoride $(HF)$ is $H_{2} {SiF}_{6} .$
The reactions are as follows:
${SiO}_{2} + 4 HF \to {SiF}_{4} + 2 H_{2} O$
$3 {SiF}_{4} + 4 H_{2} O \to 2 H_{2} {SiF}_{6} + H_{4} {SiO}_{4}$

11. THE P-BLOCK ELEMENTS

190011 Group $13$ elements show $+ 1$ and $+ 3$ oxidation states. Relative stability of $+ 3$ oxidation state may be given as

1

T l^{3 +} > I n^{3 +} > G a^{3 +} > A l^{3 +} > B^{3 +}

2

B^{3 +} > A l^{3 +} > G a^{3 +} > I n^{3 +} > T l^{3 +}

3

A l^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +} > B^{3 +}

4

A l^{3 +} > B^{3 +} > G a^{3 +} > T l^{3 +} > I n^{3 +}

Explanation:

Stability of $+ 3$ oxidation state decreases from $A l$ to $T l$ . $B$ always shows $+ 3$ oxidation state in all of its compounds

11. THE P-BLOCK ELEMENTS

190012 $B C l_{3} + H_{2} O ⟶$ Product, here product

1

H_{3} B O_{3} + H C l

2

B_{2} O_{3} + H O C l

3

B_{2} H_{6} + H C l

4

B_{2} O_{3} + H C l

Explanation:

$B C l_{3} + 3 H_{2} O \to H_{3} B O_{3} + 3 H C l$
The products formed in the reaction are $H_{3} B O_{3} + 3 H C l$ .

11. THE P-BLOCK ELEMENTS

190013 Which of the following order is correct ?

1

S i - S i > C - C > G e - G e

(Bond energy)

2

H - H > F - F > C - C

(Bond energy)

3

G e < S n < P b

(ability of

n s^{2} e^{-}

to participate in bonding)

4

S i H_{4} > S n H_{4} > P b H_{4} > C H_{4}

(easy of hydrolysis)