Question

you must have seen tarnished copper vessels being cleaned with lemon or tamarind juice explain why these sour substance are effective in cleaning the vessels ​

Answer 1

Answer:

When tarnished copper vessels get rusted , they get a green coating over them . To remove these green coating over copper basically acid(diluted or concentrated) rears with the coating to remove it.

2Cu+O2=2CuO

Answer 2

ʏᴏᴜ ᴍᴜsᴛ ʜᴀᴠᴇ sᴇᴇɴ ᴛᴀʀɴɪsʜᴇᴅ ᴄᴏᴘᴘᴇʀ ᴠᴇssᴇʟs ʙᴇɪɴɢ ᴄʟᴇᴀɴᴇᴅ ᴡɪᴛʜ ʟᴇᴍᴏɴ ᴏʀ ᴛᴀᴍᴀʀɪɴᴅ ᴊᴜɪᴄᴇ. ... ᴀɴsᴡᴇʀ: ɪɴ ᴛᴀʀɴɪsʜᴇᴅ ᴄᴏᴘᴘᴇʀ ᴠᴇssᴇʟ ᴛʜᴇʀᴇ ɪs ʟᴀʏᴇʀ ғᴏʀᴍᴇᴅ ᴅᴜᴇ ᴛᴏ ᴄᴏʀʀᴏsɪᴏɴ ᴡʜɪᴄʜ ɪs ʙᴀsɪᴄ ɪɴ ɴᴀᴛᴜʀᴇ ᴡʜɪᴄʜ ɪs ᴅɪssᴏʟᴠᴇᴅ ɪɴ ᴛʜᴇ ʟᴇᴍᴏɴ ᴏʀ ᴛᴀᴍᴀʀɪɴᴅ ᴊᴜɪᴄᴇ ᴡʜɪᴄʜ ᴀʀᴇ ᴀᴄɪᴅɪᴄ ɪɴ ɴᴀᴛᴜʀᴇ. ᴛʜᴜs ᴛʜᴇ ᴠᴇssᴇʟ ɢᴇᴛ ᴛʜᴏʀᴏᴜɢʜʟʏ ᴄʟᴇᴀɴᴇᴅ.