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STD 12 - 4. d and f- block elements — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. d and f- block elements4 Marks
MCQ
Which salt is colourless?
  • A
    $KMnO_4$
  • ✓
    $BaSO_4$
  • C
    $Na_2CrO_4$
  • D
    $COCl_2$
✓

Answer

Correct option: B.
$BaSO_4$
b
$(a)$ $\mathrm{KMnO}_{4} \quad:$ Pink/Purple

$(b)$ $BaSO $$_{4}$ : Colourless

$(c)$ $\mathrm{Na}_{2} \mathrm{CrO}_{4}:$ Yellow

$(d)$ $\mathrm{CoCl}_{2} \quad$ : Blue compound

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