Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 18

MEDIUM

Chemistry

IMPORTANT

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Which of the following statement(s) correctly explain(s) the existence of ${Mn}_{2} O_{7}$ but non-existence of ${MnF}_{7}$ ?

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Important Questions on The d- and f-Block Elements

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Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 2

The reaction of

O_{2}

and

CO

with haemoglobin gives :

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Chemistry

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Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 4

${FeCl}_{3} \cdot 6 H_{2} O + C {({CH}_{3})}_{2} {({CH}_{3} O)}_{2} \to$ Products

Reaction products are

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Chemistry

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Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 16

A black mineral

(A)

in solid state is fused with

KOH

and

{KNO}_{3}

and the mixture extracted with water to get a green coloured solution

(B)

. On passing

{CO}_{2}

gas through the solution the colour changes to pink with a black residue

(C)

. Which of the following is/are correct

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Chemistry

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Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 19

Select the incorrect statement(s).

MEDIUM

Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 20

In chromate ion,

Cr (VI)

has

d^{0}

configuration. Select the incorrect statement(s).

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Chemistry

IMPORTANT

Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 23

Select the correct statement(s) regarding alloys of transition metals.

EASY

Chemistry

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Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 25

How many number of following ions for which all octahedral complexes are paramagnetic irrespective of ligand

{Sc}^{3 +}, {Ti}^{3 +}, V^{3 +}, {Cr}^{3 +}, {Mn}^{3 +}, {Fe}^{3 +}, {Co}^{3 +}, {Ni}^{3 +}

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Chemistry

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Chemistry Crash Course JEE Advanced>Chapter 21 - The d- and f-Block Elements>Exercise 1>Q 11

The adsorption of hydrogen by platinum black is called: