Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Sample Paper>Q 60

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12th CBSE

IMPORTANT

Earn 100

Write the ionic equation for reaction of $KI$ with acidified ${KMnO}_{4}$ .

Important Questions on The d- and f-Block Elements

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12th CBSE

IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 1

The element that usually does not show a variable oxidation state is

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 2

Misch metal is:

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 3

For the four successive transition elements (

Cr, Mn, Fe

and

Co

), the stability of

+ 2

oxidation state will be there in which of the following order ?
(Atomic numbers are

Cr = 24, Mn = 25, Fe = 26, Co = 27

)

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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 4

Which of the following oxidation state is common for all lanthanoids?

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Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 5

In a qualitative analysis when

H_{2} S

is passed through the solution of a salt acidified with

HCl

, a black precipitate is obtained. On boiling the precipitate with dil.

{HNO}_{3}

, it forms a solution of blue colour. Addition of an excess of an aqueous solution of ammonia to this solution will give ________.

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 6

Indicate the steps in the preparation of ${KMnO}_{4}$ from pyrolusite ore.

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 7

Silver atom has completely filled

d

-orbitals

(4 d^{10})

in its ground state. How can one say that it is a transition element?

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12th CBSE

IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 8

Which of the

3 d

series of the transition metals exhibits the largest number of oxidation states and why?