MCQ
Bayer’s reagent used to detect olifinic double bond is
- Aacidified $KMnO_4$
- Baqueous $KMnO_4$
- ✓$1\%$ alkaline $KMnO_4$ solution
- D$KMnO_4$ in benzene
$S$ it's $1\,\%$ alkaline $KMnO _4$ solution
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$CH _{3} CH = CHCH \left( CH _{3}\right)_{2} \stackrel{ HBr }{\longrightarrow}$
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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. |
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