Arrange the oxides of group- 15 elements in decreasing order of their acidity:

N 2 O 5 > P 2 O 5 > As 2 O 5 > Sb 2 O 5 > Bi 2 O 5

P 2 O 5 > N 2 O 5 > As 2 O 5 > Sb 2 O 5 > Bi 2 O 5

Bi 2 O 5 > Sb 2 O 5 > As 2 O 5 > P 2 O 5 > N 2 O 5

N 2 O 5 > Bi 2 O 5 > P 2 O 5 > As 2 O 5 > Sb 2 O 5

Which of this order, for the property mentioned is not correct?

HOI > HOBr > HOCl [Acidic strength]

Cl 2 > Br 2 > F 2 > I 2 [Bond dissociation enthalpy]

HI > HBr > HCl > HF [Acidic strength]

HClO 4 > HClO 3 > HClO 2 > HClO [Acidic strength]

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET 2020 (24-Sep Shift-1)>Q 4

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Earn 100

In diborane ____ are present.

50% studentsanswered this correctly

Important Questions on p- Block Elements

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET Medical 2018 (22-Apr Shift-1)>Q 5

Diborane reacts with

NaH

in diethyl ether to form

X

. The reaction of

X

with

I_{2}

gives

NaI, H_{2}

and

Y

. What is

Y ?

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET Medical 2019 (24-Apr Shift-1)>Q 6

Identify the correct statements with respect to orthoboric acid from the following.
I) It is a weak tribasic acid
II) It has a layer structure in which planar

{BO}_{3}

units are joined by hydrogen bonds
III With water it forms

{[B (OH)_{4}]}^{-}

IV) It is not obtained by the hydrolysis of diborane

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET Medical 2021 (6-Sep Afternoon)>Q 7

Inorganic graphite is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET Medical 2018 (22-Apr Shift-1)>Q 8

Identify the correct statements regarding fullerene.

$i .$ It has $60$ vertices.
$ii .$ All the carbon atoms are in the ${sp}^{3}$ hybridisation.
$iii .$ The number of rings having six carbons each is $20$ and the number of rings having five carbons each is $12$ .
$iv .$ All the $C - C$ bond lengths in it are equal.