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11. THE P-BLOCK ELEMENTS

189754 Which of the following has most density

1

F e

2

C u

3

B

4

P b

Explanation:

(d) $P b$ $\Rightarrow$ $11.34 g / m l$ Heaviest

11. THE P-BLOCK ELEMENTS

189755 Red lead in an example of a/an .... oxide

1 Basic

2 Super

3 Mixed

4 Amphoteric

Explanation:

(c) $P b_{3} O_{4}$ is a mixed oxide of $2 P b O + P b O_{2}$

11. THE P-BLOCK ELEMENTS

189777 The basic structural unit of silicates is

1

S i O_{3}^{2 -}

2

S i O_{4}^{2 -}

3

S i O^{-}

4

S i O_{4}^{- 4}

Explanation:

Silicates - Salt of silicic acid $H_{4} S i O_{4}$ 269-s675

11. THE P-BLOCK ELEMENTS

189794 Which of the following form cyclic silicones on hydrolysis

1

R_{2} S i C l_{2}

2

R_{3} S i C l

3

R S i C l_{3}

4 None of these

11. THE P-BLOCK ELEMENTS

189754 Which of the following has most density

1

F e

2

C u

3

B

4

P b

Explanation:

(d) $P b$ $\Rightarrow$ $11.34 g / m l$ Heaviest

11. THE P-BLOCK ELEMENTS

189755 Red lead in an example of a/an .... oxide

1 Basic

2 Super

3 Mixed

4 Amphoteric

Explanation:

(c) $P b_{3} O_{4}$ is a mixed oxide of $2 P b O + P b O_{2}$

11. THE P-BLOCK ELEMENTS

189777 The basic structural unit of silicates is

1

S i O_{3}^{2 -}

2

S i O_{4}^{2 -}

3

S i O^{-}

4

S i O_{4}^{- 4}

Explanation:

Silicates - Salt of silicic acid $H_{4} S i O_{4}$ 269-s675

11. THE P-BLOCK ELEMENTS

189794 Which of the following form cyclic silicones on hydrolysis

1

R_{2} S i C l_{2}

2

R_{3} S i C l

3

R S i C l_{3}

4 None of these

11. THE P-BLOCK ELEMENTS

189754 Which of the following has most density

1

F e

2

C u

3

B

4

P b

Explanation:

(d) $P b$ $\Rightarrow$ $11.34 g / m l$ Heaviest

11. THE P-BLOCK ELEMENTS

189755 Red lead in an example of a/an .... oxide

1 Basic

2 Super

3 Mixed

4 Amphoteric

Explanation:

(c) $P b_{3} O_{4}$ is a mixed oxide of $2 P b O + P b O_{2}$

11. THE P-BLOCK ELEMENTS

189777 The basic structural unit of silicates is

1

S i O_{3}^{2 -}

2

S i O_{4}^{2 -}

3

S i O^{-}

4

S i O_{4}^{- 4}

Explanation:

Silicates - Salt of silicic acid $H_{4} S i O_{4}$ 269-s675

11. THE P-BLOCK ELEMENTS

189794 Which of the following form cyclic silicones on hydrolysis

1

R_{2} S i C l_{2}

2

R_{3} S i C l

3

R S i C l_{3}

4 None of these

11. THE P-BLOCK ELEMENTS

189754 Which of the following has most density

1

F e

2

C u

3

B

4

P b

Explanation:

(d) $P b$ $\Rightarrow$ $11.34 g / m l$ Heaviest

11. THE P-BLOCK ELEMENTS

189755 Red lead in an example of a/an .... oxide

1 Basic

2 Super

3 Mixed

4 Amphoteric

Explanation:

(c) $P b_{3} O_{4}$ is a mixed oxide of $2 P b O + P b O_{2}$

11. THE P-BLOCK ELEMENTS

189777 The basic structural unit of silicates is

1

S i O_{3}^{2 -}

2

S i O_{4}^{2 -}

3

S i O^{-}

4

S i O_{4}^{- 4}

Explanation:

Silicates - Salt of silicic acid $H_{4} S i O_{4}$ 269-s675

11. THE P-BLOCK ELEMENTS

189794 Which of the following form cyclic silicones on hydrolysis

1

R_{2} S i C l_{2}

2

R_{3} S i C l

3

R S i C l_{3}

4 None of these

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