Question

why is decompsiton reaction called opposite of combination reaction?

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Answer 1

Answer:

In Decomposition reaction a single substance decomposes to form two or more substances. This is exact opposite of Combination reaction in which two or more reactants combine to form a single product that is why decomposition reactions called the opposite of combination reactions.

Answer 2

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ɪɴ ᴄᴏᴍʙɪɴᴀᴛɪᴏɴ ʀᴇᴀᴄᴛɪᴏɴ ᴛᴡᴏ ᴏʀ ᴍᴏʀᴇ sᴜʙsᴛᴀɴᴄᴇs ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴇᴀᴄʜ ᴏᴛʜᴇʀ ᴛᴏ ғᴏʀᴍ ᴀ ɴᴇᴡ sᴜʙsᴛᴀɴᴄᴇ ʙᴜᴛ

ɪɴ ᴅᴇᴄᴏᴍᴘᴏsɪᴛɪᴏɴ ʀᴇᴀᴄᴛɪᴏɴ ᴀ sᴜʙsᴛᴀɴᴄᴇ ɪᴛsᴇʟғ ʙʀᴇᴀᴋs ᴅᴏᴡɴ ᴛᴏ ғᴏʀᴍ ᴛᴡᴏ ᴏʀ ᴍᴏʀᴇ sᴜʙsᴛᴀɴᴄᴇs.

sᴏ, ᴅᴇᴄᴏᴍᴘsɪᴛᴏɴ ʀᴇᴀᴄᴛɪᴏɴ ᴄᴀʟʟᴇᴅ ᴀs ᴏᴘᴘᴏsɪᴛᴇ ᴏғ ᴄᴏᴍʙɪɴᴀᴛɪᴏɴ ʀᴇᴀᴄᴛɪᴏɴ.