Questions
Which of the following statements is/ are incorrect?
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By Expert Faculty of Sri Chaitanya
a
A filter paper moistened with cadmium acetate solution turns yellow, when brought in content with H2S gas.
b
Both carbonate ions as well as bicarbonate ions in the solutions, give reddish-brown precipitate with mercury(II) chloride.
c
Sulphites in presence of zinc, reacts with dilute H2SO4 to liberate SO3 gas.
d
A filter paper moistened with KIO3 and starchturns blue in contact with SO2 vapours.
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Correct option is B
2) CO32−+4Hg2++3H2O→ 3HgO⋅HgCO3↓(Reddish brown)HCO3− do not form ppt.3) H2S gas is evolved.
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