Question

write one observation when magnesium ribbon is burnt in air​

Answer 1

The ribbon burns with a bright white light. Intense heat is also produced in this reaction. Here, when magnesium burns, it reacts with the oxygen found in air to form a powdery ash called magnesium oxide. Chemical equation: Magnesium plus Oxygen gives Magnesium oxide

Answer 2

ᴀɴꜱᴡᴇʀ :

ᴛʜᴇ ʀɪʙʙᴏɴ ʙᴜʀɴꜱ ᴡɪᴛʜ ᴀ ʙʀɪɢʜᴛ ᴡʜɪᴛᴇ ʟɪɢʜᴛ. ɪɴᴛᴇɴꜱᴇ ʜᴇᴀᴛ ɪꜱ ᴀʟꜱᴏ ᴘʀᴏᴅᴜᴄᴇᴅ ɪɴ ᴛʜɪꜱ ʀᴇᴀᴄᴛɪᴏɴ. ʜᴇʀᴇ, ᴡʜᴇɴ ᴍᴀɢɴᴇꜱɪᴜᴍ ʙᴜʀɴꜱ, ɪᴛ ʀᴇᴀᴄᴛꜱ ᴡɪᴛʜ ᴛʜᴇ ᴏxʏɢᴇɴ ꜰᴏᴜɴᴅ ɪɴ ᴀɪʀ ᴛᴏ ꜰᴏʀᴍ ᴀ ᴘᴏᴡᴅᴇʀʏ ᴀꜱʜ ᴄᴀʟʟᴇᴅ ᴍᴀɢɴᴇꜱɪᴜᴍ ᴏxɪᴅᴇ. ᴄʜᴇᴍɪᴄᴀʟ ᴇQᴜᴀᴛɪᴏɴ: ᴍᴀɢɴᴇꜱɪᴜᴍ ᴘʟᴜꜱ ᴏxʏɢᴇɴ ɢɪᴠᴇꜱ ᴍᴀɢɴᴇꜱɪᴜᴍ ᴏxɪᴅᴇ.

ᴏʀ

ᴛʜᴇ ꜰʟᴀᴍᴇ ᴘʀᴏᴠɪᴅᴇꜱ ᴀ ꜱᴏᴜʀᴄᴇ ᴏꜰ ʜᴇᴀᴛ ꜱᴏ ᴛʜᴀᴛ ᴛʜᴇ ᴍᴀɢɴᴇꜱɪᴜᴍ ᴍᴇᴛᴀʟ ᴀᴛᴏᴍꜱ ᴄᴀɴ ᴏᴠᴇʀᴄᴏᴍᴇ ᴛʜᴇɪʀ ᴀᴄᴛɪᴠᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ. ᴀᴄᴛɪᴠᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ ɪꜱ ᴛʜᴇ ᴍɪɴɪᴍᴜᴍ ᴇɴᴇʀɢʏ ʀᴇQᴜɪʀᴇᴅ ɪɴ ᴏʀᴅᴇʀ ꜰᴏʀ ᴀ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴄᴛɪᴏɴ ᴛᴏ ᴘʀᴏᴄᴇᴇᴅ. ᴡʜᴇɴ ᴛʜᴇ ᴍᴀɢɴᴇꜱɪᴜᴍ ᴍᴇᴛᴀʟ ʙᴜʀɴꜱ ɪᴛ ʀᴇᴀᴄᴛꜱ ᴡɪᴛʜ ᴏxʏɢᴇɴ ꜰᴏᴜɴᴅ ɪɴ ᴛʜᴇ ᴀɪʀ ᴛᴏ ꜰᴏʀᴍ ᴍᴀɢɴᴇꜱɪᴜᴍ ᴏxɪᴅᴇ.

ᴡʜᴇɴ ᴀ ᴍᴀɢɴᴇꜱɪᴜᴍ ʀɪʙʙᴏɴ ɪꜱ ʙᴜʀɴᴇᴅ ɪɴ ᴀɪʀ, ɪᴛ ʙᴜʀɴꜱ ᴡɪᴛʜ ᴀ ᴅᴀᴢᴢʟɪɴɢ ᴡʜɪᴛᴇ ꜰʟᴀᴍᴇ ᴘʀᴏᴅᴜᴄɪɴɢ ᴡʜɪᴛᴇ ᴀꜱʜ

ʏᴇꜱ, ᴍɢ ɪꜱ ᴏxɪᴅɪᴢᴇᴅ.

2ᴍɢ + 02→2ᴍɢᴏ