Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 6

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Copper has higher second ionisation energy than that of both adjacent elements. This is because of:

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Important Questions on The d- and f-Block Elements

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 7

E^{⊝}

values for couples

{Cr}^{3 +} / {Cr}^{2 +}

and

{Mn}^{3 +} / {Mn}^{2 +}

are

- 0.41

and

+ 1.51

volts, respectively. Considering these values, select the correct option from the following statements.

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 8

The

E^{⊖} (M^{2 +} / M)

value for copper is positive

(+ 0.34 V) .

It is due to:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 9

Which of the following pairs of ions has a magnetic moment of

5.91 B . M .

?

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 10

The highest number of unpaired electrons are in:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 11

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

reacts with

{NH}_{4} Cl

in presence of

H_{2} {SO}_{4}

The product formed is:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 12

In IIIA group, Tl (thalium) shows +1 oxidation state while other members show +3 oxidation state. Why

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 13

The number of electrons in the

M -

shell of the element with atomic number

24

is

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 14

A suspension containing insoluble substances

ZnS, MnS, HgS, {Ag}_{2} S

and

FeS

, is treated with

2 N HCl

. On filtering, the filtrate contains appreciable amounts of which one of the following?