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 Medical 2021 (6-Sep Forenoon)>Q 1

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IMPORTANT

Earn 100

Which statements about Boron and its compounds, among the following are true?
(i) Boron has high density and good electrical conductivity.
(ii) ${}^{10}B$ isotope metal borides are useful as protective shields in nuclear industry.
(iii) Borax and boric acid are used in the manufacture of glasses.
(iv) Orthoboric acid is toxic and hence not useful in antiseptic solutions.

62.5% studentsanswered this correctly

Important Questions on p- Block Elements

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET - 3 Sep 2021 Forenoon>Q 2

Identity the incorrect statement in case of diborane structure

MEDIUM

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>AP EAPCET - 3 Sep 2021 Afternoon>Q 3

The type of hybridization of Boron in diborane is _____

EASY

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IMPORTANT

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

In diborane ____ are present.

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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 ?

MEDIUM

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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

EASY

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IMPORTANT

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

EASY

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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 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.