MCQ
Sodium chloride when heated with conc. ${H_2}S{O_4}$ and solid potassium dichromate gives
- AChromic chloride
- ✓Chromyl chloride
- CChromous chloride
- DNone of these
${K_2}S{O_4} + 2N{a_2}S{O_4} + \mathop {2Cr{O_2}C{l_2} + 3{H_2}O}\limits_{{\rm{Chromyl chloride}}\,\,\,\,\,\,\,\,\,\,\,} $
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|
List $I$ (Anion) |
List $II$ $($Gas evolved on reaction with dil $H _{2} SO _{4})$ |
| $A.$ $CO _{3}^{2-}$ | $I.$ Colourless gas which turns lead acetate paper black |
| $B.$ $S^{2-}$ | $II.$ Colourless gas which turns acidified potassium dichromate solution green. |
| $C.$ $SO_{3}{ }^{2-}$ | $III.$ Brown fumes which turns acidified KI solution containing starch blue. |
| $D.$ $NO _{2}^{-}$ | $IV.$ Colourless gas evolved with brisk effervescence, which turns lime water milky. |
Choose the correct answer from the options given below
(Atomic No. $Y = 39$, $La = 57$, $Eu = 63$, $Lu = 71$)