Question

what are chemical changes ???​

Answer 1

ᴀ ᴄʜᴀɴɢᴇ ᴡʜɪᴄʜ ᴀʟᴛᴇʀs ᴛʜᴇ sᴘᴇᴄɪғɪᴄ ᴘʀᴏᴘᴏᴇʀᴛɪᴇs ᴏғ ᴀ ᴍᴀᴛᴇʀɪᴀʟ ʙʏ ʙʀɪɴɢɪɴɢ ᴀʙᴏᴜᴛ ᴀ ᴄʜᴀɴɢᴇ ɪɴ ɪᴛs ᴍᴏʟᴇᴄᴜʟᴀʀ ᴄᴏᴍᴘᴏsɪᴛɪᴏɴ, ғᴏʟʟᴏᴡᴇᴅ ʙʏ ᴄʜᴀɴɢᴇ ᴏғ sᴛᴀᴛᴇ ɪs ᴄᴀʟʟᴇᴅ ᴄʜᴇᴍɪᴄᴀʟ ᴄʜᴀɴɢᴇ.

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Answer 2

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Change is the law of nature. The type of change that occurs When a new substance is formed with different properties than the original substance is called as Chemical change.

Chemical change. In this type of change, the chemical properties also changes along with physical properties which leads to the change in composition.

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☞The identity of original substance or the reactant is completely lost now.

→The change is generally permanent and irreversible because it is difficult to bring back the original composition.

→It may or may not be accompanied by energy change. Catalyst can also be used to increase the rate of reaction.

→It will follow law of conservation of mass but their can be change in the mass of individual elements.