Orange coloured compd. Which of the following is not correctly matched?....

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Orange
coloured compd.
Which of the following is not correctly matched?
(1) \( [\mathrm{A}] \) is \( \mathrm{NaOH} \)
(2) \( [\mathrm{B}] \) is \( \mathrm{Na}_{2} \mathrm{CrO}_{3} \)
(3) \( [\mathrm{B}] \) is \( \mathrm{Na}_{2} \mathrm{CrO}_{4} \)
(4) \( [\mathrm{C}] \) is \( \mathrm{Na}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \)


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