Question

What are chemical change​

Answer 1

Answer:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.

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Answer 2

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❥ᴀ ᴜsᴜᴀʟʟʏ ɪʀʀᴇᴠᴇʀsɪʙʟᴇ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴɪɴᴠᴏʟᴠɪɴɢ ᴛʜᴇ ʀᴇᴀʀʀᴀɴɢᴇᴍᴇɴᴛ ᴏғ ᴛʜᴇ ᴀᴛᴏᴍs ᴏғ ᴏɴᴇ ᴏʀ ᴍᴏʀᴇ sᴜʙsᴛᴀɴᴄᴇs ᴀɴᴅ ᴀ ᴄʜᴀɴɢᴇɪɴ ᴛʜᴇɪʀ ᴄʜᴇᴍɪᴄᴀʟ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴏʀ ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ, ʀᴇsᴜʟᴛɪɴɢ ɪɴ ᴛʜᴇ ғᴏʀᴍᴀᴛɪᴏɴ ᴏғ ᴀᴛ ʟᴇᴀsᴛ ᴏɴᴇ ɴᴇᴡ sᴜʙsᴛᴀɴᴄᴇ: ᴛʜᴇ ғᴏʀᴍᴀᴛɪᴏɴ ᴏғ ʀᴜsᴛ ᴏɴ ɪʀᴏɴ ɪs ᴀ ᴄʜᴇᴍɪᴄᴀʟ ᴄʜᴀɴɢᴇ.

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