Which of the following statements are correct for catalytic azide test? \( \mathrm{P} \) (1) \( ...

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Which of the following statements are correct for catalytic azide test?
\( \mathrm{P} \)
(1) \( \mathrm{NaN}_{3} \) does not react with \( \mathrm{KI}_{3} \) in presence of
W
sulphide ion.
(2) \( \mathrm{NaN}_{3} \) reacts with \( \mathrm{KI}_{3} \) in presence of \( \mathrm{S}_{2} \mathrm{O}_{3}^{2-} \) and \( \mathrm{SCN}^{-} \).
(3) \( \mathrm{ZnCO}_{3} \) or \( \mathrm{CdCO}_{3} \) gives ppt with sulphide ion.
(4) \( \mathrm{NaN}_{3} \) and \( \mathrm{KI}_{3} \) are colourless and dark brown compounds respectively.
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