Amongst ${\mathrm{CuF}}_2,{\mathrm{CuCl}}_2$ and ${\mathrm{CuBr}}_2$ :

Important Questions on The d- and f-Block Elements

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 24

${\mathrm{CuSO}}_4(\mathrm{aq}.)+4{\mathrm{NH}}_3⟶\mathrm{X},$ then $\mathrm{X}$ is :

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 25

When excess of sodium thiosulphate is added to dil. ${\mathrm{AgNO}}_3$ solution a soluble compound $\mathrm{X}$ is formed. However, when dil. ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3$ solution is addeed to conc. ${\mathrm{AgNO}}_3$ solution a white ppt. turning yellow and finally black ppt. of $\mathrm{Y}$ is obtained. Which is/are not correct pair:

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Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 26

Which of the following statement(s) is (are) correct with reference to ferrous and ferric ions

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Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 27

Select the incorrect statement(s):

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 28

Cuprous chloride can be prepared:

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Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 29

Which of the following ions are coloured?

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Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 30

Photographic films or plates have _____ as an essential ingredient.

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IMPORTANT

Beta Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>EXERCISE-2>Q 31

Silver halides are used in photography because they are: