A) Bromine water
B) Aqueous
C) Fehlings solution
D) Ammoniacal\[AgN{{O}_{3}}\]
Correct Answer: D
Solution :
Key Idea: (a) Bromine water is used to distinguish between saturated and unsaturated compounds. (b) Aqueous \[NaOH\] is used to distinguish between hydrocarbons and ethers. (c) Fehlings solution is used to distinguish between aldehyde and ketone (d) Ammoniacal \[AgN{{O}_{3}}\]is used to distinguish between terminal and non-terminal alkynes. \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH+AgN{{O}_{3}}\xrightarrow{{}}\] \[\underset{\text{white}\,\text{ppt}\text{.}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C\equiv CAg}}\,\] \[C{{H}_{3}}-C\equiv C{{H}_{3}}+AgN{{O}_{3}}\xrightarrow{{}}\text{no}\,\text{reaction}\] \[AgN{{O}_{3}}\]reacts with only terminal alkynes due to presence of acidic hydrogen.
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