all of X in a beaker. Stir & filter. Keep both
d filtrate & residue.
INFERENCE: salt x is a misture of soluble and insolube salt
——————————————————
(2ii)TEST: Divide d filtrate into two
portions. (i) To d first portion add a few
drops of dilute HNO3 followed by
aqueous solution of AgNO3 OBSERVATION: white precipitate is
formed
INFERENCE: Cl may present
——————————————————
(2iii)TEST: Add NH3OH in excess to d
resulting mixture in B (i).
OBSERVATION: The white ppt dissolved
in excess NH4OH(aq)
INFERENCE: Cl^- is present
——————————————————
(2iv)TEST: To d second[Receiving Text] portion add
ammonia solution in drops.
OBSERVATION: White ppt is formed
which soluble in excess
INFERENCE: Zn^2 is present
—————————————————— (2v)TEST: To d second
portion add
ammonia solution in excess
OBSERVATION: White ppt is not soluble
INFERENCE: PB^2 or Al^3 are likely to
present ——————————————————
(2vi)TEST: Dissolve the Residue in above
5cm3 of dilute HNO3, divide the resulting
soluble into two portion
OBSERVATION: Effervescence occur and a
gas that turns lime water milky is evolved
INFERENCE: Co2 gas is involved from
Co3^2-
——————————————————
(2vii)TEST: To d second portion add
aqueous solution of potassium-iodide. OBSERVATION: Yellow ppt is formed
INFERENCE: PB2 is present
——————————————————
(
2viii)TEST: Heat & allow to cool
OBSERVATION: The ppt desolve and re- appear on cooling
INFERENCE: Pb2 is confirmed
3aii. for the starch iodine test is
performed in
which the starch reacts with iodine to
produce dark blue colour which confirms
the presence of starch.
for glucose benedict’s and fehling’s test
is
performed.
benedict’s test: 3ai. Inorganic Chemistry/Qualitative
Analysis/Tests for anions
3c. Burette
Conical flask
Pipette
3b. Calcium chloride,
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