Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 22

MEDIUM

JEE Main

IMPORTANT

Earn 100

The incorrect statement about ${Cr}^{2 +}$ and ${Mn}^{3 +}$ is/are (Atomic number $Cr = 24, Mn = 25$ ).

100% studentsanswered this correctly

Important Questions on The d- and f-block Elements

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 23

The equivalent weight of potassium permanganate, when it acts as an oxidizing agent in acidic medium, is:

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 24

Which of the following species has oxygen in

- 1

oxidation state?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 25

K_{2} {Cr}_{2} O_{7}

solution turns green when

{Na}_{2} {SO}_{3}

is added to it in the presence of an acid due to:

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 26

Which is correct statement for

{Cr}_{2} O_{7}^{2 -}

?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 27

{KMnO}_{4}

acts as an oxidizing agent in alkaline medium. When alkaline

{KMnO}_{4}

is treated with

KI

, iodide ion is oxidized to

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 28

Element used in cancer treatment is

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 29

Which of the following statements is not correct regarding lanthanides and actinides?

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 2>Q 30

$Ce (Z = 58)$ and $Yb (Z = 70)$ exhibit stable $+ 4$ and $+ 2$ oxidation states, respectively. This is because