Question

State three characteristics of a physical change.


Define : Crystallisation
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Answer 1

Answer -

physical change:

1) it is reversible

2) no new products are formed

3) it is temporary

Answer 2

Answer:

ᴀ ᴘʜʏsɪᴄᴀʟ ᴄʜᴀɴɢᴇ ɪɴᴠᴏʟᴠᴇs ᴀ ᴄʜᴀɴɢᴇ ɪɴ ᴘʜʏsɪᴄᴀʟ ᴘʀᴏᴘᴇʀᴛɪᴇs. ᴇxᴀᴍᴘʟᴇs ᴏғ ᴘʜʏsɪᴄᴀʟ ᴘʀᴏᴘᴇʀᴛɪᴇs ɪɴᴄʟᴜᴅᴇ ᴍᴇʟᴛɪɴɢ, ᴛʀᴀɴsɪᴛɪᴏɴ ᴛᴏ ᴀ ɢᴀs, ᴄʜᴀɴɢᴇ ᴏғ sᴛʀᴇɴɢᴛʜ, ᴄʜᴀɴɢᴇ ᴏғ ᴅᴜʀᴀʙɪʟɪᴛʏ, ᴄʜᴀɴɢᴇs ᴛᴏ ᴄʀʏsᴛᴀʟ ғᴏʀᴍ, ᴛᴇxᴛᴜʀᴀʟ ᴄʜᴀɴɢᴇ, sʜᴀᴘᴇ, sɪᴢᴇ, ᴄᴏʟᴏʀ, ᴠᴏʟᴜᴍᴇ ᴀɴᴅ ᴅᴇɴsɪᴛʏ.

ᴄʀʏsᴛᴀʟʟɪᴢᴀᴛɪᴏɴ ɪs ᴅᴇғɪɴᴇᴅ ᴀs ᴀ ᴘʀᴏᴄᴇss ʙʏ ᴡʜɪᴄʜ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ɪs ᴄᴏɴᴠᴇʀᴛᴇᴅ ғʀᴏᴍ ᴀ ʟɪϙᴜɪᴅ sᴏʟᴜᴛɪᴏɴ ɪɴᴛᴏ ᴀ sᴏʟɪᴅ ᴄʀʏsᴛᴀʟʟɪɴᴇ sᴛᴀᴛᴇ.