Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 9

EASY

12th Odisha Board

IMPORTANT

Earn 100

Name a member of the lanthanoid series which is well known to exhibit $+ 4$ oxidation state.

Important Questions on The f-block Elements

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 1

Define Lanthanoid contraction. Write two consequences of it.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 2

‘

Eu

’ and ‘

Yb

’ show

+ 2

oxidation state, whereas

+ 4

oxidation state is shown by

Ce

and

Tb

. Why?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 3

Explain with correct reason whether

{Sm}^{2 +}

and

{Eu}^{2 +}

act as good oxidising or reducing agent.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 4

{La}^{3 +}

and

{Lu}^{3 +}

are colourless, whereas

{Sm}^{3 +}

and

{Eu}^{3 +}

are coloured. Why?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 5

Mention important uses of uranium and plutonium.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 6

Chemistry of all lanthanoids is quite similar. Why?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 7

From element to element, the actinoid contraction is greater than the lanthanoid contraction. Why?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-2>Chapter 12 - The f-block Elements>QUESTIONS>Q 8

Give reason why : Chemistry of all the lanthanoids is quite similar.