MCQ
Dehydrohalogenation of an alkyl halide is a/an:
- ANucleophilic substitution reaction.
- BElimination reaction
- CBoth nucleophilic substitution and elimination reaction.
- DRearrangement
Explanation:
Dehydrohalogenation is an elimination reaction. In this reaction, hydrogen and halogen atoms get eliminated from alkyl halide to give an alkene or alkynes.
For example: When chloropropane is heated with alcoholic KOH gives Propene.
Reaction: CH3CH3CH2Cl + KOH $\xrightarrow{\text{heat}}$ CH3CH=CH2 + KCl + H2O.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Statement $I:$ Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement $II:$ The green colour observed is due to the formation of copper(I) metaborate.
In the light of the above statements, choose the most appropriate answer from the options given below :
$A : 1s^2\, 2s^2\, 2p^6$
$B : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^3$
$C : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^5$