EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2020 (Sep-23 Shift-1)>Q 14

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Earn 100

Which of the following metals is used as a catalyst in Haber's process of ammonia synthesis?

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Important Questions on p- Block Elements

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2019 (21-Apr Shift-2)>Q 15

Sodium nitrite is reacted with

H_{2} {SO}_{4}

to form

{NaHSO}_{4}, {HNO}_{3},

water and

X

. Gold is dissolved in aqua regia to form water,

{AuCl}_{4}^{-}

and

Y . X

and

Y

are respectively

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2019 (21-Apr Shift-2)>Q 16

The number of

P - OH

bonds present in pyrophosphoric acid and hypophosphoric acid is respectively

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET - 20 Aug 2021 Afternoon>Q 17

The correct order of acidic character of the following is:

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2019 (21-Apr Shift-2)>Q 18

The electron gain enthalpy

Δ_{eg} H

of

Cl (g)

is

- 349 kJ {mol}^{- 1}

. If the ground state energy of

Cl (g)

is

x kJ {mol}^{- 1},

the ground state energy

(in kJ {mol}^{- 1})

of

{Cl}^{-} (g)

is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2018 (25-APR Shift-1)>Q 19

Hot concentrated sulphuric acid on reaction with which one of the following elements, produces two gaseous products?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2018 (25-APR Shift-1)>Q 20

Which of the following statements are correct?

I)

P_{4}

molecule is very reactive because of angular strain.

II)

The basicity of

H_{3} {PO}_{3}

is

3

.

III)

In gas phase, all

P - Cl bonds

of

{PCl}_{5}

have same bond length.

IV)

In solid state,

{PCl}_{5}

exists as an ionic solid, in which anion

{[{PCl}_{6}]}^{-}

has octahedral and cation

{[{PCl}_{4}]}^{+}

has tetrahedral shape.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2019 (21-Apr Shift-2)>Q 21

White phosphorus, when heated with conc.

NaOH

solution in an inert atmosphere of

{CO}_{2}

, forms phosphine and a sodium salt of oxoacid of phosphorus,

' X'

. The oxidation state of phosphorus in

' X'

is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2021 (19-Aug Afternoon)>Q 22

Due to

pπ - pπ

bonding interactions, nitrogen for

N_{2}

but phosphorus forms and does not form a diatomic molecule.