All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 15

EASY

12th ICSE

IMPORTANT

Earn 100

In chromic acid $({CrO}_{3})$ , $Cr$ has $d^{0}$ configuration but it is bright orange coloured solid, why?

Important Questions on d-and f-Block Elements

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 16

Reactivity of transition elements decreases almost regularly from

Sc

to

Cu

. Why?

EASY

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IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 17

Why there is striking similarities (horizontal and vertical) among successive members of the transition series?

EASY

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IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 18

Why

{Cu}^{+}

salts are colourless, while

{Cu}^{2 +}

salts are coloured?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 18

The elements of

d

-series exhibit a larger number of oxidation states than the elements of

f

-series. Explain.

EASY

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IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 19

Chromium is a typically hard metal while mercury is a liquid. Why?

EASY

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IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 20

What happens, when

{KMnO}_{4}

is heated?

EASY

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IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 20

What happens when

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

is heated?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 21

Why fluorine stabilises the low oxidation states of transition metals?