Question

What are physical and chemical change ??​

Answer 1

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• ᴛʜᴇ ᴅɪғғᴇʀᴇɴᴄᴇ ʙᴇᴛᴡᴇᴇɴ ᴀ ᴘʜʏsɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ ᴀɴᴅ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ ɪs ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ. ɪɴ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ, ᴛʜᴇʀᴇ ɪs ᴀ ᴄʜᴀɴɢᴇ ɪɴ ᴛʜᴇ ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ ᴏғ ᴛʜᴇ sᴜʙsᴛᴀɴᴄᴇs ɪɴ ǫᴜᴇsᴛɪᴏɴ; ɪɴ ᴀ ᴘʜʏsɪᴄᴀʟ ᴄʜᴀɴɢᴇ ᴛʜᴇʀᴇ ɪs ᴀ ᴅɪғғᴇʀᴇɴᴄᴇ ɪɴ ᴛʜᴇ ᴀᴘᴘᴇᴀʀᴀɴᴄᴇ, sᴍᴇʟʟ, ᴏʀ sɪᴍᴘʟᴇ ᴅɪsᴘʟᴀʏ ᴏғ ᴀ sᴀᴍᴘʟᴇ ᴏғ ᴍᴀᴛᴛᴇʀ ᴡɪᴛʜᴏᴜᴛ ᴀ ᴄʜᴀɴɢᴇ ɪɴ ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ.

Answer 2

Explanation:

Key Points. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.