31.

Assertion (A) : A current of 96.5 A is passed into aqueous AgNO₃ solution for 100 s. The weight of silver deposited is 10.8 g (At. wt. of Ag = 108)

Reason (R) : The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.

The correct answer is :

• Both (A) and (R) are true and (R) is the correct explanation of (A).

• Both (A) and (R) are true but (R) is not the correct explanation of (A).

• (A) is true but (R) is false.

• (A) is false but (R) is true.

Hydrolysis of NCl₃ gives NH₃ and X. Which of the following is X?

• HClO₄

• HClO₃

• HOCl

• HClO₂

What are the metal ions present in carnallite?

• Mg, K

• Al, Na

• Na, Mg

• Zn, Mg

Which of the following is added to chloroform to slowdown its aerial oxidation in presence of light?

• Carbonyl chloride

• Ethyl alcohol

• Sodium hydroxide

• Nitric acid

Which of the products is formed when acetone is reacted with barium hydroxide solution ?

• CH₃ - $\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}$ - CH₂ - $\underset{\mathrm{OH}}{\overset{{\mathrm{CH}}_3}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$ - CH₃

• CH₃ - $\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}} - \underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}} - \underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}$ - CH₃

• CH₃ - $\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}} - \underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}} - \underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}}$ - CH₃

• CH₃ - $\underset{{\mathrm{CH}}_3}{\overset{\mathrm{OH}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}} - \underset{{\mathrm{CH}}_3}{\overset{\mathrm{OH}}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}$ - CH₃

When acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that ?

• Cu₂O

• Cu

• CuO

• CuSO₄

Match the following lists:

• A - 3; B - 4; C - 2; D - 1

• A - 3; B - 4; C - 1; D - 2

• A - 2; B - 1; C - 4; D - 5

• A - 5; B - 3; C - 2; D - 1

Which of the following compounds when heated with CO at 150°C and 500 atm pressure in presence of BF₃ forms ethyl propionate ?

• C₂H₅OH

• CH₃OCH₃

• C₂H₅OC₂H₅

• CH₃OC₂H₅

When compound X is oxidised by acidified potassium dichromate, compound Y is formed. Compound Y on reduction with LiAlH₄ gives X. X and Y respectively are :

• C₂H₅OH, CH₃COOH

• CH₃COCH₃, CH₃COOH

• C₂H₅OH, CH₃COCH₃

• CH₃CHO, CH₃COCH₃

Ethyl chloride reacts with sodium ethoxide to form a compound A. Which of the following reactions also yields A ?

• C₂H₅Cl, KOH (alc.), $∆$

• 2C₂H₅OH, conc. H₂SO₄, 140°C

• C₂H₅Cl, Mg (dry ether)

• C₂H₂, dilute H₂SO₄, HgSO₄