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11. THE P-BLOCK ELEMENTS

190088 Given below are two statements:Statement $I$ : Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.Statement $I I$ : ${AlCl}_{3}$ upon hydrolysis in acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.In the light of the above statements, choose the correct answer from the options given below :

1 Statement

I

is true but statement

I I

is false

2 Statement

I

is false but statement

I I

is true

3 Both statement

I

and statement

I I

are false

4 Both statement

I

and statement

I I

are true

Explanation:

In trivalent state most of the compounds being covalent are hydrolysed in water. Trichlorides on hydrolysis in water form tetrahedral ${[M (OH)_{4}]}^{-}$ species, the hybridisation state of element $M$ is ${sp}^{3}$ .
In case of aluminium, acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.

11. THE P-BLOCK ELEMENTS

189961 The incorrect stability order of $+ 3$ and $+ 1$ states of $13^{t h}$ group elements (boron family) is

1

G a^{3 +} < I n^{3 +} < T l^{3 +}

2

T l^{+} > T l^{3 +}

3

G a^{+} < I n^{+} < T l^{+}

4

G a^{3 +} > G a^{+}

11. THE P-BLOCK ELEMENTS

189641 Alumina is

1 Acidic

2 Basic

3 Amphoteric

4 None of these

11. THE P-BLOCK ELEMENTS

189642 The most abundant metal in the earth crust is

1

A l

2

C a

3

F e

4

N a

Explanation:

(a) $A l$ is the most abundant metal in the earth crust.

11. THE P-BLOCK ELEMENTS

190088 Given below are two statements:Statement $I$ : Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.Statement $I I$ : ${AlCl}_{3}$ upon hydrolysis in acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.In the light of the above statements, choose the correct answer from the options given below :

1 Statement

I

is true but statement

I I

is false

2 Statement

I

is false but statement

I I

is true

3 Both statement

I

and statement

I I

are false

4 Both statement

I

and statement

I I

are true

Explanation:

In trivalent state most of the compounds being covalent are hydrolysed in water. Trichlorides on hydrolysis in water form tetrahedral ${[M (OH)_{4}]}^{-}$ species, the hybridisation state of element $M$ is ${sp}^{3}$ .
In case of aluminium, acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.

11. THE P-BLOCK ELEMENTS

189961 The incorrect stability order of $+ 3$ and $+ 1$ states of $13^{t h}$ group elements (boron family) is

1

G a^{3 +} < I n^{3 +} < T l^{3 +}

2

T l^{+} > T l^{3 +}

3

G a^{+} < I n^{+} < T l^{+}

4

G a^{3 +} > G a^{+}

11. THE P-BLOCK ELEMENTS

189641 Alumina is

1 Acidic

2 Basic

3 Amphoteric

4 None of these

11. THE P-BLOCK ELEMENTS

189642 The most abundant metal in the earth crust is

1

A l

2

C a

3

F e

4

N a

Explanation:

(a) $A l$ is the most abundant metal in the earth crust.

11. THE P-BLOCK ELEMENTS

190088 Given below are two statements:Statement $I$ : Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.Statement $I I$ : ${AlCl}_{3}$ upon hydrolysis in acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.In the light of the above statements, choose the correct answer from the options given below :

1 Statement

I

is true but statement

I I

is false

2 Statement

I

is false but statement

I I

is true

3 Both statement

I

and statement

I I

are false

4 Both statement

I

and statement

I I

are true

Explanation:

In trivalent state most of the compounds being covalent are hydrolysed in water. Trichlorides on hydrolysis in water form tetrahedral ${[M (OH)_{4}]}^{-}$ species, the hybridisation state of element $M$ is ${sp}^{3}$ .
In case of aluminium, acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.

11. THE P-BLOCK ELEMENTS

189961 The incorrect stability order of $+ 3$ and $+ 1$ states of $13^{t h}$ group elements (boron family) is

1

G a^{3 +} < I n^{3 +} < T l^{3 +}

2

T l^{+} > T l^{3 +}

3

G a^{+} < I n^{+} < T l^{+}

4

G a^{3 +} > G a^{+}

11. THE P-BLOCK ELEMENTS

189641 Alumina is

1 Acidic

2 Basic

3 Amphoteric

4 None of these

11. THE P-BLOCK ELEMENTS

189642 The most abundant metal in the earth crust is

1

A l

2

C a

3

F e

4

N a

Explanation:

(a) $A l$ is the most abundant metal in the earth crust.

11. THE P-BLOCK ELEMENTS

190088 Given below are two statements:Statement $I$ : Group $13$ trivalent halides get easily hydrolyzed by water due to their covalent nature.Statement $I I$ : ${AlCl}_{3}$ upon hydrolysis in acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.In the light of the above statements, choose the correct answer from the options given below :

1 Statement

I

is true but statement

I I

is false

2 Statement

I

is false but statement

I I

is true

3 Both statement

I

and statement

I I

are false

4 Both statement

I

and statement

I I

are true

Explanation:

In trivalent state most of the compounds being covalent are hydrolysed in water. Trichlorides on hydrolysis in water form tetrahedral ${[M (OH)_{4}]}^{-}$ species, the hybridisation state of element $M$ is ${sp}^{3}$ .
In case of aluminium, acidified aqueous solution forms octahedral ${[Al {(H_{2} O)}_{6}]}^{3 +}$ ion.

11. THE P-BLOCK ELEMENTS

189961 The incorrect stability order of $+ 3$ and $+ 1$ states of $13^{t h}$ group elements (boron family) is

1

G a^{3 +} < I n^{3 +} < T l^{3 +}

2

T l^{+} > T l^{3 +}

3

G a^{+} < I n^{+} < T l^{+}

4

G a^{3 +} > G a^{+}

11. THE P-BLOCK ELEMENTS

189641 Alumina is

1 Acidic

2 Basic

3 Amphoteric

4 None of these

11. THE P-BLOCK ELEMENTS

189642 The most abundant metal in the earth crust is

1

A l

2

C a

3

F e

4

N a

Explanation:

(a) $A l$ is the most abundant metal in the earth crust.