All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 4

EASY

12th ICSE

IMPORTANT

Earn 100

Why does the transition element scandium ( $Z = 21$ ) not exhibit variable oxidation state?

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 5

Explain the large difference in the melting point of

Cr (1920 ° C)

and

Zn (420 ° C)

.

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 6

The spin only magnetic moment of

M^{2 +}

ion.

(Z = 27)

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 7

Why does copper metal not replace hydrogen from acid?

EASY

12th ICSE

IMPORTANT

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

Why are

E^{\circ}

values of

Mn, Zn

more negative than expected?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 9

The atomic size of

Fe, Co

and

Ni

are nearly same. Explain the reason.

MEDIUM

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 10

Why

{Zn}^{2 +}

salts are white while

{Ni}^{2 +}

salts are blue?

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 8 - d-and f-Block Elements>Chapter Practice>Q 11

Out of

{[Sc {(H_{2} O)}_{6}]}^{3 +}

and

{[Ti {(H_{2} O)}_{6}]}^{3 +}

ions, which is coloured and why?

EASY

12th ICSE

IMPORTANT

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

What factors led to the appearance of colour in the transition elements?