EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2018>Q 12

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KEAM

IMPORTANT

Earn 100

Select the correct option(s) for the following statements:

$1 . C l_{2} O$ and $C l O_{2}$ are used as bleaching agents.

$2 . O C l^{-}$ salts are used as detergents.

$3 . O C l^{-}$ disproportionates in alkaline medium.

$4 .$ $B r O_{3}^{-}$ is oxidized in acidic medium.

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Important Questions on The p-block Elements

HARD

KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2020>Q 1

Choose the correct statements about diborane;
I. It is prepared by the oxidation of sodium borohydride with iodine.
II. It undergoes cleavage reactions with Lewis bases to give borane adducts.
III. It is produced on an industrial scale by the reaction of

{BF}_{3}

with

{LiAlH}_{4}

.
IV. It is readily hydrolysed by water to give borazine.
V. It burns in oxygen and gives boron trioxide.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2018>Q 2

A l_{2} {(S O_{4})}_{3}

is used for a variety of purposes but not

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2018>Q 3

More than four bonds are made by how many elements in the carbon family?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2019>Q 4

Which hydride amongst the following has the least boiling point ?

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2020>Q 5

The oxyacid of phosphorus that contains one

P - OH,

two

P - H

and one

P = O

bonds is

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2019>Q 6

The compound(s) that does(do) not exist is (are)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2019>Q 7

{PCl}_{3}

is stored in a well stoppered bottle since

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The p-block Elements>KEAM 2018>Q 8

Consider the following statements concerning

N_{2} H_{4} :

(i) It is an exothermic compound.

(ii) It burns in air with the evolution of heat.

(iii) It has kinetic stability.

(iv) It reduces

F e^{3 +}

to

F e^{2 +}

in acidic medium.

Which of the following combinations is correct?