Sea weads are important source of bromine. – InterviewSolution

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1.	Sea weads are important source of bromine.
Answer» Sea-weads are important source of iodine.

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Concentrated `HNO_3`, upon long standing, turns yellow-brown due to the formation ofA. `NO`B. `NO_2`C. `N_2 O`D. `N_2 O_4`
When sulphur is boiled is boiled with `Na_2 SO_3`, a compound `(X)` is produced, `(X)` with excess of `AgNO_3` solution gives a compound `(Y)` which is soluble in water and produces a black coloured sulphide `(Z)`. Identify compounds `(X),(Y)` and `(Z)`.