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CHXI11:THE P-BLOCK ELEMENTS

316078 When an inorganic compound $(X)$ having $3 c - 2 e$ as well as $2 c - 2 e$ bonds reacts with ammonia gas at a certain temperature, gives a compound $(Y)$ , isostructural with benzene. Compound (X) with ammonia at a high temperature produces a substance (Z). Identify the correct statement.

1

(X) is B_{2} H_{6}

2 (Z) is known as inorganic graphite

3 (Y) is

B_{3} N_{3} H_{6}

4 All of these

CHXI11:THE P-BLOCK ELEMENTS

316079 Diborane upon hydrolysis gives

1 boric anhydride

2 metaboric acid

3 orthoboric acid

4 boron oxide

CHXI11:THE P-BLOCK ELEMENTS

316080 In diborane, the two $H - B - H$ angles are nearly

1

60^{\circ}, 120^{\circ}

2

97^{\circ}, 120^{\circ}

3

95^{\circ}, 150^{\circ}

4

120^{\circ}, 180^{\circ}

Explanation:

Structure of diborane is as follows:
supporting img
Thus, the $H - B - H$ angles are nearly $97^{\circ}$ and $120^{\circ}$ .

AIIMS - 2006

CHXI11:THE P-BLOCK ELEMENTS

316081 A Lewis acid ' $X$ ' reacts with ${LiAlH}_{4}$ in ether medium to give a highly toxic gas. This gas when heated with ${NH}_{3}$ gives a compound commonly known as inorganic benzene. The gas is

1

B_{2} H_{6}

2

B_{3} N_{3} H_{6}

3

{BF}_{3}

4

B_{2} O_{3}

Explanation:

$3 B_{2} H_{6} + 6N H_{3} \overset{Δ}{\to} 2 \underset{(inorganic benzene)}{B_{3} N_{3} H_{6} + 12 H_{2}}$
Diborane (highly toxic gas) is formed when ${BF}_{3}$ (Lewis acid) reacts with ${LiAlH}_{4}$ in presence of ether.
$\underset{(X)}{4 {BF}_{3}} + 3 {LiAlH}_{4} \overset{ether}{⟶} \underset{(Toxic gas)}{2 B_{2} H_{6}} + 3 LiF + 3 {AlF}_{3}$

KCET - 2020

CHXI11:THE P-BLOCK ELEMENTS

316082 Which of the following is correct?

1 The members of

B_{n} H_{n + 6}

are less stable than

B_{n} H_{n + 4}

series

2 Diborane is colored and unstable at room temperature

3 The reaction of diborane with oxygen is endothermic

4 All of the above

CHXI11:THE P-BLOCK ELEMENTS

316078 When an inorganic compound $(X)$ having $3 c - 2 e$ as well as $2 c - 2 e$ bonds reacts with ammonia gas at a certain temperature, gives a compound $(Y)$ , isostructural with benzene. Compound (X) with ammonia at a high temperature produces a substance (Z). Identify the correct statement.

1

(X) is B_{2} H_{6}

2 (Z) is known as inorganic graphite

3 (Y) is

B_{3} N_{3} H_{6}

4 All of these

CHXI11:THE P-BLOCK ELEMENTS

316079 Diborane upon hydrolysis gives

1 boric anhydride

2 metaboric acid

3 orthoboric acid

4 boron oxide

CHXI11:THE P-BLOCK ELEMENTS

316080 In diborane, the two $H - B - H$ angles are nearly

1

60^{\circ}, 120^{\circ}

2

97^{\circ}, 120^{\circ}

3

95^{\circ}, 150^{\circ}

4

120^{\circ}, 180^{\circ}

Explanation:

Structure of diborane is as follows:
supporting img
Thus, the $H - B - H$ angles are nearly $97^{\circ}$ and $120^{\circ}$ .

AIIMS - 2006

CHXI11:THE P-BLOCK ELEMENTS

316081 A Lewis acid ' $X$ ' reacts with ${LiAlH}_{4}$ in ether medium to give a highly toxic gas. This gas when heated with ${NH}_{3}$ gives a compound commonly known as inorganic benzene. The gas is

1

B_{2} H_{6}

2

B_{3} N_{3} H_{6}

3

{BF}_{3}

4

B_{2} O_{3}

Explanation:

$3 B_{2} H_{6} + 6N H_{3} \overset{Δ}{\to} 2 \underset{(inorganic benzene)}{B_{3} N_{3} H_{6} + 12 H_{2}}$
Diborane (highly toxic gas) is formed when ${BF}_{3}$ (Lewis acid) reacts with ${LiAlH}_{4}$ in presence of ether.
$\underset{(X)}{4 {BF}_{3}} + 3 {LiAlH}_{4} \overset{ether}{⟶} \underset{(Toxic gas)}{2 B_{2} H_{6}} + 3 LiF + 3 {AlF}_{3}$

KCET - 2020

CHXI11:THE P-BLOCK ELEMENTS

316082 Which of the following is correct?

1 The members of

B_{n} H_{n + 6}

are less stable than

B_{n} H_{n + 4}

series

2 Diborane is colored and unstable at room temperature

3 The reaction of diborane with oxygen is endothermic

4 All of the above

CHXI11:THE P-BLOCK ELEMENTS

316078 When an inorganic compound $(X)$ having $3 c - 2 e$ as well as $2 c - 2 e$ bonds reacts with ammonia gas at a certain temperature, gives a compound $(Y)$ , isostructural with benzene. Compound (X) with ammonia at a high temperature produces a substance (Z). Identify the correct statement.

1

(X) is B_{2} H_{6}

2 (Z) is known as inorganic graphite

3 (Y) is

B_{3} N_{3} H_{6}

4 All of these

CHXI11:THE P-BLOCK ELEMENTS

316079 Diborane upon hydrolysis gives

1 boric anhydride

2 metaboric acid

3 orthoboric acid

4 boron oxide

CHXI11:THE P-BLOCK ELEMENTS

316080 In diborane, the two $H - B - H$ angles are nearly

1

60^{\circ}, 120^{\circ}

2

97^{\circ}, 120^{\circ}

3

95^{\circ}, 150^{\circ}

4

120^{\circ}, 180^{\circ}

Explanation:

Structure of diborane is as follows:
supporting img
Thus, the $H - B - H$ angles are nearly $97^{\circ}$ and $120^{\circ}$ .

AIIMS - 2006

CHXI11:THE P-BLOCK ELEMENTS

316081 A Lewis acid ' $X$ ' reacts with ${LiAlH}_{4}$ in ether medium to give a highly toxic gas. This gas when heated with ${NH}_{3}$ gives a compound commonly known as inorganic benzene. The gas is

1

B_{2} H_{6}

2

B_{3} N_{3} H_{6}

3

{BF}_{3}

4

B_{2} O_{3}

Explanation:

$3 B_{2} H_{6} + 6N H_{3} \overset{Δ}{\to} 2 \underset{(inorganic benzene)}{B_{3} N_{3} H_{6} + 12 H_{2}}$
Diborane (highly toxic gas) is formed when ${BF}_{3}$ (Lewis acid) reacts with ${LiAlH}_{4}$ in presence of ether.
$\underset{(X)}{4 {BF}_{3}} + 3 {LiAlH}_{4} \overset{ether}{⟶} \underset{(Toxic gas)}{2 B_{2} H_{6}} + 3 LiF + 3 {AlF}_{3}$

KCET - 2020

CHXI11:THE P-BLOCK ELEMENTS

316082 Which of the following is correct?

1 The members of

B_{n} H_{n + 6}

are less stable than

B_{n} H_{n + 4}

series

2 Diborane is colored and unstable at room temperature

3 The reaction of diborane with oxygen is endothermic

4 All of the above

CHXI11:THE P-BLOCK ELEMENTS

316078 When an inorganic compound $(X)$ having $3 c - 2 e$ as well as $2 c - 2 e$ bonds reacts with ammonia gas at a certain temperature, gives a compound $(Y)$ , isostructural with benzene. Compound (X) with ammonia at a high temperature produces a substance (Z). Identify the correct statement.

1

(X) is B_{2} H_{6}

2 (Z) is known as inorganic graphite

3 (Y) is

B_{3} N_{3} H_{6}

4 All of these

CHXI11:THE P-BLOCK ELEMENTS

316079 Diborane upon hydrolysis gives

1 boric anhydride

2 metaboric acid

3 orthoboric acid

4 boron oxide

CHXI11:THE P-BLOCK ELEMENTS

316080 In diborane, the two $H - B - H$ angles are nearly

1

60^{\circ}, 120^{\circ}

2

97^{\circ}, 120^{\circ}

3

95^{\circ}, 150^{\circ}

4

120^{\circ}, 180^{\circ}

Explanation:

Structure of diborane is as follows:
supporting img
Thus, the $H - B - H$ angles are nearly $97^{\circ}$ and $120^{\circ}$ .

AIIMS - 2006

CHXI11:THE P-BLOCK ELEMENTS

316081 A Lewis acid ' $X$ ' reacts with ${LiAlH}_{4}$ in ether medium to give a highly toxic gas. This gas when heated with ${NH}_{3}$ gives a compound commonly known as inorganic benzene. The gas is

1

B_{2} H_{6}

2

B_{3} N_{3} H_{6}

3

{BF}_{3}

4

B_{2} O_{3}

Explanation:

$3 B_{2} H_{6} + 6N H_{3} \overset{Δ}{\to} 2 \underset{(inorganic benzene)}{B_{3} N_{3} H_{6} + 12 H_{2}}$
Diborane (highly toxic gas) is formed when ${BF}_{3}$ (Lewis acid) reacts with ${LiAlH}_{4}$ in presence of ether.
$\underset{(X)}{4 {BF}_{3}} + 3 {LiAlH}_{4} \overset{ether}{⟶} \underset{(Toxic gas)}{2 B_{2} H_{6}} + 3 LiF + 3 {AlF}_{3}$

KCET - 2020

CHXI11:THE P-BLOCK ELEMENTS

316082 Which of the following is correct?

1 The members of

B_{n} H_{n + 6}

are less stable than

B_{n} H_{n + 4}

series

2 Diborane is colored and unstable at room temperature

3 The reaction of diborane with oxygen is endothermic

4 All of the above

CHXI11:THE P-BLOCK ELEMENTS

316078 When an inorganic compound $(X)$ having $3 c - 2 e$ as well as $2 c - 2 e$ bonds reacts with ammonia gas at a certain temperature, gives a compound $(Y)$ , isostructural with benzene. Compound (X) with ammonia at a high temperature produces a substance (Z). Identify the correct statement.

1

(X) is B_{2} H_{6}

2 (Z) is known as inorganic graphite

3 (Y) is

B_{3} N_{3} H_{6}

4 All of these

CHXI11:THE P-BLOCK ELEMENTS

316079 Diborane upon hydrolysis gives

1 boric anhydride

2 metaboric acid

3 orthoboric acid

4 boron oxide

CHXI11:THE P-BLOCK ELEMENTS

316080 In diborane, the two $H - B - H$ angles are nearly

1

60^{\circ}, 120^{\circ}

2

97^{\circ}, 120^{\circ}

3

95^{\circ}, 150^{\circ}

4

120^{\circ}, 180^{\circ}

Explanation:

Structure of diborane is as follows:
supporting img
Thus, the $H - B - H$ angles are nearly $97^{\circ}$ and $120^{\circ}$ .

AIIMS - 2006

CHXI11:THE P-BLOCK ELEMENTS

316081 A Lewis acid ' $X$ ' reacts with ${LiAlH}_{4}$ in ether medium to give a highly toxic gas. This gas when heated with ${NH}_{3}$ gives a compound commonly known as inorganic benzene. The gas is

1

B_{2} H_{6}

2

B_{3} N_{3} H_{6}

3

{BF}_{3}

4

B_{2} O_{3}

Explanation:

$3 B_{2} H_{6} + 6N H_{3} \overset{Δ}{\to} 2 \underset{(inorganic benzene)}{B_{3} N_{3} H_{6} + 12 H_{2}}$
Diborane (highly toxic gas) is formed when ${BF}_{3}$ (Lewis acid) reacts with ${LiAlH}_{4}$ in presence of ether.
$\underset{(X)}{4 {BF}_{3}} + 3 {LiAlH}_{4} \overset{ether}{⟶} \underset{(Toxic gas)}{2 B_{2} H_{6}} + 3 LiF + 3 {AlF}_{3}$

KCET - 2020

CHXI11:THE P-BLOCK ELEMENTS

316082 Which of the following is correct?

1 The members of

B_{n} H_{n + 6}

are less stable than

B_{n} H_{n + 4}

series

2 Diborane is colored and unstable at room temperature

3 The reaction of diborane with oxygen is endothermic

4 All of the above