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07. The p-BLOCK ELEMENTS (XII)

189219 Which of the following products is formed on boiling tin with an alkali solution

1

S n (O H)_{2}

2

S n (O H)_{4}

3

S n O_{3}^{2 -}

4

S n O_{2}

Explanation:

When Tin with an alkali solution then $S n O_{3}^{- 2}$ is formed as a product.

07. The p-BLOCK ELEMENTS (XII)

189230 Which of the following hydrides has the lowest boiling point

1

H_{2} O

2

H_{2} S

3

H_{2} S e

4

H_{2} T e

Explanation:

(b) $H_{2} S$ has lowest boiling point and $H_{2} O$ has highest boiling point because if any compound has hydrogen bond. Its boiling point is high.

$H_{2} O$
$H_{2} S$
$H_{2} S e$
$H_{2} T e$

$373 K$
$213 K$
$269 K$
$232 K$

07. The p-BLOCK ELEMENTS (XII)

189231 The catalyst used in the manufacture of $H_{2} S O_{4}$ by contact process is

1

A l_{2} O_{3}

2

C r_{2} O_{3}

3

V_{2} O_{5}

4

M n O_{2}

Explanation:

(c) $V_{2} O_{5}$ catalyst are used for the manufacture of $H_{2} S O_{4}$ by Contact process.

07. The p-BLOCK ELEMENTS (XII)

189232 The molecular formula of sulphur is

1

S

2

S_{2}

3

S_{4}

4

S_{8}

Explanation:

The most common form of the element sulfur is composed of molecules that consist of eight atoms of sulfur and its molecular formula is $S_{8}$ .

07. The p-BLOCK ELEMENTS (XII)

189233 Which of the following is not suitable for use in a descicator to dry substances

1 Conc.

H_{2} S O_{4}

2

N a_{2} S O_{4}

3

C a C l_{2}

4

P_{4} O_{10}

Explanation:

Dessicants are substances that are hygroscopic in nature. And concentrated $H_{2} S O_{4}$ is not hygroscopic in nature.

07. The p-BLOCK ELEMENTS (XII)

189219 Which of the following products is formed on boiling tin with an alkali solution

1

S n (O H)_{2}

2

S n (O H)_{4}

3

S n O_{3}^{2 -}

4

S n O_{2}

Explanation:

When Tin with an alkali solution then $S n O_{3}^{- 2}$ is formed as a product.

07. The p-BLOCK ELEMENTS (XII)

189230 Which of the following hydrides has the lowest boiling point

1

H_{2} O

2

H_{2} S

3

H_{2} S e

4

H_{2} T e

Explanation:

(b) $H_{2} S$ has lowest boiling point and $H_{2} O$ has highest boiling point because if any compound has hydrogen bond. Its boiling point is high.

$H_{2} O$
$H_{2} S$
$H_{2} S e$
$H_{2} T e$

$373 K$
$213 K$
$269 K$
$232 K$

07. The p-BLOCK ELEMENTS (XII)

189231 The catalyst used in the manufacture of $H_{2} S O_{4}$ by contact process is

1

A l_{2} O_{3}

2

C r_{2} O_{3}

3

V_{2} O_{5}

4

M n O_{2}

Explanation:

(c) $V_{2} O_{5}$ catalyst are used for the manufacture of $H_{2} S O_{4}$ by Contact process.

07. The p-BLOCK ELEMENTS (XII)

189232 The molecular formula of sulphur is

1

S

2

S_{2}

3

S_{4}

4

S_{8}

Explanation:

The most common form of the element sulfur is composed of molecules that consist of eight atoms of sulfur and its molecular formula is $S_{8}$ .

07. The p-BLOCK ELEMENTS (XII)

189233 Which of the following is not suitable for use in a descicator to dry substances

1 Conc.

H_{2} S O_{4}

2

N a_{2} S O_{4}

3

C a C l_{2}

4

P_{4} O_{10}

Explanation:

Dessicants are substances that are hygroscopic in nature. And concentrated $H_{2} S O_{4}$ is not hygroscopic in nature.

07. The p-BLOCK ELEMENTS (XII)

189219 Which of the following products is formed on boiling tin with an alkali solution

1

S n (O H)_{2}

2

S n (O H)_{4}

3

S n O_{3}^{2 -}

4

S n O_{2}

Explanation:

When Tin with an alkali solution then $S n O_{3}^{- 2}$ is formed as a product.

07. The p-BLOCK ELEMENTS (XII)

189230 Which of the following hydrides has the lowest boiling point

1

H_{2} O

2

H_{2} S

3

H_{2} S e

4

H_{2} T e

Explanation:

(b) $H_{2} S$ has lowest boiling point and $H_{2} O$ has highest boiling point because if any compound has hydrogen bond. Its boiling point is high.

$H_{2} O$
$H_{2} S$
$H_{2} S e$
$H_{2} T e$

$373 K$
$213 K$
$269 K$
$232 K$

07. The p-BLOCK ELEMENTS (XII)

189231 The catalyst used in the manufacture of $H_{2} S O_{4}$ by contact process is

1

A l_{2} O_{3}

2

C r_{2} O_{3}

3

V_{2} O_{5}

4

M n O_{2}

Explanation:

(c) $V_{2} O_{5}$ catalyst are used for the manufacture of $H_{2} S O_{4}$ by Contact process.

07. The p-BLOCK ELEMENTS (XII)

189232 The molecular formula of sulphur is

1

S

2

S_{2}

3

S_{4}

4

S_{8}

Explanation:

The most common form of the element sulfur is composed of molecules that consist of eight atoms of sulfur and its molecular formula is $S_{8}$ .

07. The p-BLOCK ELEMENTS (XII)

189233 Which of the following is not suitable for use in a descicator to dry substances

1 Conc.

H_{2} S O_{4}

2

N a_{2} S O_{4}

3

C a C l_{2}

4

P_{4} O_{10}

Explanation:

Dessicants are substances that are hygroscopic in nature. And concentrated $H_{2} S O_{4}$ is not hygroscopic in nature.

07. The p-BLOCK ELEMENTS (XII)

189219 Which of the following products is formed on boiling tin with an alkali solution

1

S n (O H)_{2}

2

S n (O H)_{4}

3

S n O_{3}^{2 -}

4

S n O_{2}

Explanation:

When Tin with an alkali solution then $S n O_{3}^{- 2}$ is formed as a product.

07. The p-BLOCK ELEMENTS (XII)

189230 Which of the following hydrides has the lowest boiling point

1

H_{2} O

2

H_{2} S

3

H_{2} S e

4

H_{2} T e

Explanation:

(b) $H_{2} S$ has lowest boiling point and $H_{2} O$ has highest boiling point because if any compound has hydrogen bond. Its boiling point is high.

$H_{2} O$
$H_{2} S$
$H_{2} S e$
$H_{2} T e$

$373 K$
$213 K$
$269 K$
$232 K$

07. The p-BLOCK ELEMENTS (XII)

189231 The catalyst used in the manufacture of $H_{2} S O_{4}$ by contact process is

1

A l_{2} O_{3}

2

C r_{2} O_{3}

3

V_{2} O_{5}

4

M n O_{2}

Explanation:

(c) $V_{2} O_{5}$ catalyst are used for the manufacture of $H_{2} S O_{4}$ by Contact process.

07. The p-BLOCK ELEMENTS (XII)

189232 The molecular formula of sulphur is

1

S

2

S_{2}

3

S_{4}

4

S_{8}

Explanation:

The most common form of the element sulfur is composed of molecules that consist of eight atoms of sulfur and its molecular formula is $S_{8}$ .

07. The p-BLOCK ELEMENTS (XII)

189233 Which of the following is not suitable for use in a descicator to dry substances

1 Conc.

H_{2} S O_{4}

2

N a_{2} S O_{4}

3

C a C l_{2}

4

P_{4} O_{10}

Explanation:

Dessicants are substances that are hygroscopic in nature. And concentrated $H_{2} S O_{4}$ is not hygroscopic in nature.

07. The p-BLOCK ELEMENTS (XII)

189219 Which of the following products is formed on boiling tin with an alkali solution

1

S n (O H)_{2}

2

S n (O H)_{4}

3

S n O_{3}^{2 -}

4

S n O_{2}

Explanation:

When Tin with an alkali solution then $S n O_{3}^{- 2}$ is formed as a product.

07. The p-BLOCK ELEMENTS (XII)

189230 Which of the following hydrides has the lowest boiling point

1

H_{2} O

2

H_{2} S

3

H_{2} S e

4

H_{2} T e

Explanation:

(b) $H_{2} S$ has lowest boiling point and $H_{2} O$ has highest boiling point because if any compound has hydrogen bond. Its boiling point is high.

$H_{2} O$
$H_{2} S$
$H_{2} S e$
$H_{2} T e$

$373 K$
$213 K$
$269 K$
$232 K$

07. The p-BLOCK ELEMENTS (XII)

189231 The catalyst used in the manufacture of $H_{2} S O_{4}$ by contact process is

1

A l_{2} O_{3}

2

C r_{2} O_{3}

3

V_{2} O_{5}

4

M n O_{2}

Explanation:

(c) $V_{2} O_{5}$ catalyst are used for the manufacture of $H_{2} S O_{4}$ by Contact process.

07. The p-BLOCK ELEMENTS (XII)

189232 The molecular formula of sulphur is

1

S

2

S_{2}

3

S_{4}

4

S_{8}

Explanation:

The most common form of the element sulfur is composed of molecules that consist of eight atoms of sulfur and its molecular formula is $S_{8}$ .

07. The p-BLOCK ELEMENTS (XII)

189233 Which of the following is not suitable for use in a descicator to dry substances

1 Conc.

H_{2} S O_{4}

2

N a_{2} S O_{4}

3

C a C l_{2}

4

P_{4} O_{10}

Explanation:

Dessicants are substances that are hygroscopic in nature. And concentrated $H_{2} S O_{4}$ is not hygroscopic in nature.