Cations(+ve to cathode -ve)

Question 1

Aluminium (Al 3+)
Effect of NaOH (aq)
Effect of NH3 (aq)

Answer 1

White ppt (soluble in excess)
White ppt (insoluble in excess)

Question 2

Calcium (Ca 2+)
Effect of NaOH (aq)
Effect of NH3 (aq)

Answer 2

White ppt (insoluble in excess)
No ppt for NH3

Question 3

Zinc(Zn2+)
Effect of NaOH (aq)Effect of NH3 (aq)

Answer 3

White ppt (soluble in excess)
White ppt (soluble in excess)

Question 4

Copper (Cu 2+)
Effect of NaOH (aq)Effect of NH3 (aq)

Answer 4

Light blue ppt (insoluble in excess)
Light blue ppt (soluble in excess)

Question 5

Iron || (Fe 2+)
Effect of NaOH (aq)Effect of NH3 (aq)

Answer 5

Green ppt (insoluble in excess)
Green ppt (insoluble in excess)

Question 6

Iron ||| (Fe 3+)
Effect of NaOH (aq)Effect of NH3 (aq)

Answer 6

Reddish-brown ppt (insoluble in excess)
Reddish-brown ppt (insoluble in excess)

Question 7

Ammonium (NH 4+)
Effect of NaOH (aq)
Effect of NH3 (aq)

Answer 7

Ammonia gas released on heating with NaOH
No Effect with NH3(ammonia)