Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Sample Paper>Q 59

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IMPORTANT

Earn 100

What is the oxidation state of chromium in chromate ion and dichromate ion?

Important Questions on The d- and f-Block Elements

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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 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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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 8

Which of the

3 d

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

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IMPORTANT

Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - The d- and f-Block Elements>Exercise>Q 10

Electronic configuration of a transition element

X

in

+ 3

oxidation state is

[Ar] 3 d^{5}

. What is its atomic number?

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IMPORTANT

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

Write the ionic equation for reaction of

KI

with acidified

{KMnO}_{4}

.

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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 9

Indicate the steps in the preparation of

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

from chromite ore.