EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2021 (19-Aug Afternoon)>Q 11

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IMPORTANT

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The structure of diborane $B_{2} H_{6}$ is given below. Identify the bond angles $x, y .$ In diborane, which bonds are commonly known as banana-bonds

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Important Questions on p- Block Elements

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2018 (25-APR Shift-1)>Q 12

Identify the incorrect statements from the following

I .

Tin in

+ 2

state acts as reducing agent while lead in

+ 4

state acts as strong oxidising agent.

II .

Silicon exists as both

{[{SiF}_{6}]}^{2 -}

and

{[{SiCl}_{6}]}^{2 -}

forms.

III .

The hybridisation of carbon in fullerene is

{sp}^{3}

.

IV .

Among

Ge, Sn

and

Pb

lowest melting point is for

Sn

.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2021 (19-Aug Forenoon)>Q 13

Identify

(P)

and

(Q)

in the following reaction:

2 {CH}_{3} Cl + Si \to_{570 K}^{Cu powder} (P) \overset{H_{2} O}{⟶} (Q) ⟶ Straight chain polymer

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

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

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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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IMPORTANT

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

EASY

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IMPORTANT

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?