Question

when an alkali metals dissolve in liquid Ammonia its occurs different colour explain​

Answer 1

Wʜᴇɴ ᴀɴ ᴀʟᴋᴀʟɪ ᴍᴇᴛᴀʟ ᴅɪssᴏʟᴠᴇ ɪɴ ʟɪϙᴜɪᴅ ᴀᴍᴍᴏɴɪᴀ, ᴛʜᴇ sᴏʟᴜᴛɪᴏɴ ᴄᴀɴ ᴀᴄϙᴜɪʀᴇ ᴅɪғғᴇʀᴇɴᴛ ᴄᴏʟᴏʀs,I ᴍᴇᴀɴ ᴅɪʟᴜᴛᴇ sᴏʟᴜᴛɪᴏɴs ᴏғ ᴀʟᴋᴀʟɪ ᴍᴇᴛᴀʟs ɪɴ ʟɪϙᴜɪᴅ ᴀᴍᴍᴏɴɪᴀ ᴇxʜɪʙɪᴛ ᴅᴀʀᴋ ʙʟᴜᴇᴄᴏʟᴏʀ ᴛʜɪs ɪs ʙᴇᴄᴀᴜsᴇ ᴏғ ᴀᴍᴍᴏɴɪᴀᴛᴇᴅ ᴇʟᴇᴄᴛʀᴏɴs ᴀʙsᴏʀʙ ᴇɴᴇʀɢʏ ɪɴ ᴛʜᴇ ᴠɪsɪʙʟᴇ ʀᴇɢɪᴏɴ ᴏғ ʟɪɢʜᴛ.

Answer 2

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When an alkali metal dissolve in liquid ammonia, the solution can acquire different colors,I mean dilute solutions of alkali metals in liquid ammonia exhibit dark blue color this is because of ammoniated electrons absorb energy in the visible region of light.

hope it helps you...