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

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$K_{2} {Cr}_{2} O_{7}$ reacts with ${NH}_{4} Cl$ in presence of $H_{2} {SO}_{4}$ The product formed is:

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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 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?

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 15

In which of the following compound transition metal has zero oxidation state

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 16

Which one of the following ions do not give borax bead test:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 17

The melting point of $Zn$ is lower as compared to those of the other elements of $3 d$ series because:

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Alpha Question Bank for Medical: Chemistry>Chapter 19 - The d- and f-Block Elements>Exercise 2>Q 18

Among the follewing series of transition metal ions, the one where all metal ions have

3 d^{2}

electronic configuration is :

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

Maximum oxidation sate is shown by: