Observations and inferences Flashcards
(9 cards)
1
Q
NaOH is added to Solution A;
GREEN PRECIPITATE FORMED
A
Fe²⁺ ions is present
2
Q
NaOH is added to Solution A;
PRECIPITATE DARKENED WHEN LEFT TO STAND AND TURNED ORANGE AT THE TOP OF THE TEST TUBE
A
Fe²⁺ is oxidized to Fe³⁺
3
Q
COLOURLESS GAS EVOLVED WITH PUNGENT ODOUR .GAS TURNED DAMP RED LITMUS PAPER BLUE
A
NH₄⁺
4
Q
COLOURLESS SOLUTION FORMED
A
Na⁺ or K⁺
5
Q
Reddish-brown precipitate
Insoluble in excess NaOH
A
Fe³⁺
6
Q
Blue precipitate Insoluble in excess NaOH
A
Cu²⁺ present
7
Q
White precipitate Insoluble in excess NaOH
A
Ca²⁺ or Mg²⁺present
8
Q
White precipitate Soluble in excess NaOH
A
Al³⁺
9
Q
White precipitate Soluble in excess NaOH (forms clear solution)
A
Zn²⁺ present
