A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment? (
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May be heat production.. Change in colour. Gas production. Change in the state
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ᴍɪss ᴍᴀsᴛᴇʀᴍɪɴᴅ~❤️
ᴄʜᴇᴍɪᴄᴀʟ ᴄʜᴀɴɢᴇs ᴏᴄᴄᴜʀ ᴡʜᴇɴ ᴀ sᴜʙsᴛᴀɴᴄᴇ ᴄᴏᴍʙɪɴᴇs ᴡɪᴛʜ ᴀɴᴏᴛʜᴇʀ ᴛᴏ ғᴏʀᴍ ᴀ ɴᴇᴡ sᴜʙsᴛᴀɴᴄᴇ, ᴄᴀʟʟᴇᴅ ᴄʜᴇᴍɪᴄᴀʟ sʏɴᴛʜᴇsɪs ᴏʀ, ᴀʟᴛᴇʀɴᴀᴛɪᴠᴇʟʏ, ᴄʜᴇᴍɪᴄᴀʟ ᴅᴇᴄᴏᴍᴘᴏsɪᴛɪᴏɴ ɪɴᴛᴏ ᴛᴡᴏ ᴏʀ ᴍᴏʀᴇ ᴅɪғғᴇʀᴇɴᴛ sᴜʙsᴛᴀɴᴄᴇs. ᴛʜᴇsᴇ ᴘʀᴏᴄᴇssᴇs ᴀʀᴇ ᴄᴀʟʟᴇᴅ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴs ᴀɴᴅ, ɪɴ ɢᴇɴᴇʀᴀʟ, ᴀʀᴇ ɴᴏᴛ ʀᴇᴠᴇʀsɪʙʟᴇ ᴇxᴄᴇᴘᴛ ʙʏ ғᴜʀᴛʜᴇʀ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴs.
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