Question

Q.8. What is a homologous series? Write the formula and names of the first 4 members of
the group of saturated hydrocarbons​

Answer 1

Answer:

The homologous series of straight-chained alkanes begins methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), and pentane (C5H12). In that series, successive members differ in mass by an extra methylene bridge (-CH2- unit) inserted in the chain.

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Answer 2

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• ᴇxᴀᴍᴘʟᴇs. ᴛʜᴇ ʜᴏᴍᴏʟᴏɢᴏᴜs sᴇʀɪᴇs ᴏғ sᴛʀᴀɪɢʜᴛ-ᴄʜᴀɪɴᴇᴅ ᴀʟᴋᴀɴᴇs ʙᴇɢɪɴs ᴍᴇᴛʜᴀɴᴇ (ᴄʜ4), ᴇᴛʜᴀɴᴇ (ᴄ2ʜ6), ᴘʀᴏᴘᴀɴᴇ (ᴄ3ʜ8), ʙᴜᴛᴀɴᴇ (ᴄ4ʜ10), ᴀɴᴅ ᴘᴇɴᴛᴀɴᴇ (ᴄ5ʜ12). ɪɴ ᴛʜᴀᴛ sᴇʀɪᴇs, sᴜᴄᴄᴇssɪᴠᴇ ᴍᴇᴍʙᴇʀs ᴅɪғғᴇʀ ɪɴ ᴍᴀss ʙʏ ᴀɴ ᴇxᴛʀᴀ ᴍᴇᴛʜʏʟᴇɴᴇ ʙʀɪᴅɢᴇ (-ᴄʜ2- ᴜɴɪᴛ) ɪɴsᴇʀᴛᴇᴅ ɪɴ ᴛʜᴇ ᴄʜᴀɪɴ.