Question

i. Avoid plastics as for as possible? Comment on this advice?
ii. What are the main advantages of synthetic fibres?
iii. What are blended fibres? Explain with example?
iv. A silver spoon is kept immersed in an aqueous solution of copper
sulphate. What change will take place?
v. What happens when a magnesium ribbon heated in presence of air?
​

Answer 1

$Answer$

1) ᴀᴠᴏɪᴅ ᴛʜᴇ ᴜsᴇ ᴏғ ᴘʟᴀsᴛɪᴄs ᴀs ғᴀʀ ᴀs ᴘᴏssɪʙʟᴇ.ᴘʟᴀsᴛɪᴄs ᴀʀᴇ ɴᴏɴ-ʙɪᴏᴅᴇɢʀᴀᴅᴀʙʟᴇ ᴍᴀᴛᴇʀɪᴀʟs. sᴏ ᴜsᴇ ᴏғᴘʟᴀsᴛɪᴄs ɪs ʜᴀʀᴍғᴜʟ ғᴏʀ ᴏᴜʀ ᴇɴᴠɪʀᴏɴᴍᴇɴᴛ. ᴛʜᴇ ᴘʟᴀsᴛɪᴄs ᴄᴀɴɴᴏᴛ ʙᴇ ғɪɴᴀʟʟʏ ᴅɪsᴘᴏsᴇᴅ ᴏғғ.

2) ᴀᴅᴠᴀɴᴛᴀɢᴇs. sʏɴᴛʜᴇᴛɪᴄ ғɪʙᴇʀs ᴀʀᴇ ᴍᴏʀᴇ ᴅᴜʀᴀʙʟᴇ ᴛʜᴀɴ ᴍᴏsᴛ ɴᴀᴛᴜʀᴀʟ ғɪʙᴇʀs ᴀɴᴅ ᴡɪʟʟ ʀᴇᴀᴅɪʟʏ ᴘɪᴄᴋ-ᴜᴘ ᴅɪғғᴇʀᴇɴᴛ ᴅʏᴇs. ɪɴ ᴀᴅᴅɪᴛɪᴏɴ, ᴍᴀɴʏ sʏɴᴛʜᴇᴛɪᴄ ғɪʙᴇʀs ᴏғғᴇʀ ᴄᴏɴsᴜᴍᴇʀ-ғʀɪᴇɴᴅʟʏ ғᴜɴᴄᴛɪᴏɴs sᴜᴄʜ ᴀs sᴛʀᴇᴛᴄʜɪɴɢ, ᴡᴀᴛᴇʀᴘʀᴏᴏғɪɴɢ ᴀɴᴅ sᴛᴀɪɴ ʀᴇsɪsᴛᴀɴᴄᴇ.

3) ʙʟᴇɴᴅᴇᴅ ғɪʙʀᴇs ᴀʀᴇ ᴍᴀᴅᴇ ʙʏ ᴄᴏᴍʙɪɴɪɴɢ ᴠᴀʀɪᴏᴜs ғɪʙʀᴇs ᴛᴏ ᴇɴʜᴀɴᴄᴇ ᴛʜᴇ ᴘʀᴏᴘᴇʀᴛʏ ᴏғ ᴛʜᴇ ᴘʀᴏᴅᴜᴄᴛ. ғᴏʀ ᴇɢ: sᴘᴀɴᴅᴇx ᴀɴᴅ ᴄᴏᴛᴛᴏɴ ɪs ᴀ ɴᴀᴛᴜʀᴀʟ ᴍɪx ғᴏʀ sᴘᴏʀᴛs ᴄʟᴏᴛʜɪɴɢ ᴀɴᴅ ᴜɴᴅᴇʀɢᴀʀᴍᴇɴᴛs ᴛᴏ ɪᴍᴘʀᴏᴠᴇ sᴛʀᴇᴛᴄʜɪɴɢ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴀɴᴅ ᴘʀᴇᴠᴇɴᴛ ᴏᴅᴏᴜʀ. ᴀ ʙʟᴇɴᴅᴇᴅ ғᴀʙʀɪᴄ ʜᴇʟᴘs ᴏᴠᴇʀᴄᴏᴍᴇ ᴛʜᴇ ᴅɪsᴀᴅᴠᴀɴᴛᴀɢᴇs ᴏғ ɴᴀᴛᴜʀᴀʟ ᴀɴᴅ sʏɴᴛʜᴇᴛɪᴄ ғɪʙʀᴇ.

4) ᴡʜᴇɴ ᴀ sɪʟᴠᴇʀ sᴘᴏᴏɴ ɪs ɪᴍᴍᴇʀsᴇᴅ ɪɴ ᴀᴄᴏᴘᴘᴇʀ sᴜʟᴘʜᴀᴛᴇ sᴏʟᴜᴛɪᴏɴ, ɴᴏᴛʜɪɴɢ ʜᴀᴘᴘᴇɴs. ɪᴛ ɪs ʙᴇᴄᴀᴜsᴇ sɪʟᴠᴇʀ ɪs ʟᴇss ʀᴇᴀᴄᴛɪᴠᴇ ᴛʜᴀɴ ᴄᴏᴘᴘᴇʀ ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏᴄʜᴇᴍɪᴄᴀʟ sᴇʀɪᴇs, sᴏ ɪᴛ ᴄᴀɴ ɴᴏᴛ ᴅɪsᴘʟᴀᴄᴇ ᴄᴏᴘᴘᴇʀ ғʀᴏᴍ ᴄᴏᴘᴘᴇʀ sᴜʟᴘʜᴀᴛᴇsᴏʟᴜᴛɪᴏɴ.

5) ᴛʜᴇ ʀɪʙʙᴏɴ ʙᴜʀɴs ᴡɪᴛʜ ᴀ ʙʀɪɢʜᴛ ᴡʜɪᴛᴇ ʟɪɢʜᴛ. ɪɴᴛᴇɴsᴇ ʜᴇᴀᴛ ɪs ᴀʟsᴏ ᴘʀᴏᴅᴜᴄᴇᴅ ɪɴ ᴛʜɪs ʀᴇᴀᴄᴛɪᴏɴ. ʜᴇʀᴇ, ᴡʜᴇɴ ᴍᴀɢɴᴇsɪᴜᴍʙᴜʀɴs, ɪᴛ ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴛʜᴇ ᴏxʏɢᴇɴ ғᴏᴜɴᴅ ɪɴ ᴀɪʀ ᴛᴏ ғᴏʀᴍ ᴀ ᴘᴏᴡᴅᴇʀʏ ᴀsʜ ᴄᴀʟʟᴇᴅᴍᴀɢɴᴇsɪᴜᴍ ᴏxɪᴅᴇ. ᴄʜᴇᴍɪᴄᴀʟ ᴇǫᴜᴀᴛɪᴏɴ:ᴍᴀɢɴᴇsɪᴜᴍ ᴘʟᴜs ᴏxʏɢᴇɴ ɢɪᴠᴇsᴍᴀɢɴᴇsɪᴜᴍ ᴏxɪᴅᴇ.

Answer 2

Answer:

1) ᴀᴠᴏɪᴅ ᴛʜᴇ ᴜsᴇ ᴏғ ᴘʟᴀsᴛɪᴄs ᴀs ғᴀʀ ᴀs ᴘᴏssɪʙʟᴇ.ᴘʟᴀsᴛɪᴄs ᴀʀᴇ ɴᴏɴ-ʙɪᴏᴅᴇɢʀᴀᴅᴀʙʟᴇ ᴍᴀᴛᴇʀɪᴀʟs. sᴏ ᴜsᴇ ᴏғᴘʟᴀsᴛɪᴄs ɪs ʜᴀʀᴍғᴜʟ ғᴏʀ ᴏᴜʀ ᴇɴᴠɪʀᴏɴᴍᴇɴᴛ. ᴛʜᴇ ᴘʟᴀsᴛɪᴄs ᴄᴀɴɴᴏᴛ ʙᴇ ғɪɴᴀʟʟʏ ᴅɪsᴘᴏsᴇᴅ ᴏғғ.

2) ᴀᴅᴠᴀɴᴛᴀɢᴇs. sʏɴᴛʜᴇᴛɪᴄ ғɪʙᴇʀs ᴀʀᴇ ᴍᴏʀᴇ ᴅᴜʀᴀʙʟᴇ ᴛʜᴀɴ ᴍᴏsᴛ ɴᴀᴛᴜʀᴀʟ ғɪʙᴇʀs ᴀɴᴅ ᴡɪʟʟ ʀᴇᴀᴅɪʟʏ ᴘɪᴄᴋ-ᴜᴘ ᴅɪғғᴇʀᴇɴᴛ ᴅʏᴇs. ɪɴ ᴀᴅᴅɪᴛɪᴏɴ, ᴍᴀɴʏ sʏɴᴛʜᴇᴛɪᴄ ғɪʙᴇʀs ᴏғғᴇʀ ᴄᴏɴsᴜᴍᴇʀ-ғʀɪᴇɴᴅʟʏ ғᴜɴᴄᴛɪᴏɴs sᴜᴄʜ ᴀs sᴛʀᴇᴛᴄʜɪɴɢ, ᴡᴀᴛᴇʀᴘʀᴏᴏғɪɴɢ ᴀɴᴅ sᴛᴀɪɴ ʀᴇsɪsᴛᴀɴᴄᴇ.

3) ʙʟᴇɴᴅᴇᴅ ғɪʙʀᴇs ᴀʀᴇ ᴍᴀᴅᴇ ʙʏ ᴄᴏᴍʙɪɴɪɴɢ ᴠᴀʀɪᴏᴜs ғɪʙʀᴇs ᴛᴏ ᴇɴʜᴀɴᴄᴇ ᴛʜᴇ ᴘʀᴏᴘᴇʀᴛʏ ᴏғ ᴛʜᴇ ᴘʀᴏᴅᴜᴄᴛ. ғᴏʀ ᴇɢ: sᴘᴀɴᴅᴇx ᴀɴᴅ ᴄᴏᴛᴛᴏɴ ɪs ᴀ ɴᴀᴛᴜʀᴀʟ ᴍɪx ғᴏʀ sᴘᴏʀᴛs ᴄʟᴏᴛʜɪɴɢ ᴀɴᴅ ᴜɴᴅᴇʀɢᴀʀᴍᴇɴᴛs ᴛᴏ ɪᴍᴘʀᴏᴠᴇ sᴛʀᴇᴛᴄʜɪɴɢ ᴘʀᴏᴘᴇʀᴛɪᴇs ᴀɴᴅ ᴘʀᴇᴠᴇɴᴛ ᴏᴅᴏᴜʀ. ᴀ ʙʟᴇɴᴅᴇᴅ ғᴀʙʀɪᴄ ʜᴇʟᴘs ᴏᴠᴇʀᴄᴏᴍᴇ ᴛʜᴇ ᴅɪsᴀᴅᴠᴀɴᴛᴀɢᴇs ᴏғ ɴᴀᴛᴜʀᴀʟ ᴀɴᴅ sʏɴᴛʜᴇᴛɪᴄ ғɪʙʀᴇ.

4) ᴡʜᴇɴ ᴀ sɪʟᴠᴇʀ sᴘᴏᴏɴ ɪs ɪᴍᴍᴇʀsᴇᴅ ɪɴ ᴀᴄᴏᴘᴘᴇʀ sᴜʟᴘʜᴀᴛᴇ sᴏʟᴜᴛɪᴏɴ, ɴᴏᴛʜɪɴɢ ʜᴀᴘᴘᴇɴs. ɪᴛ ɪs ʙᴇᴄᴀᴜsᴇ sɪʟᴠᴇʀ ɪs ʟᴇss ʀᴇᴀᴄᴛɪᴠᴇ ᴛʜᴀɴ ᴄᴏᴘᴘᴇʀ ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏᴄʜᴇᴍɪᴄᴀʟ sᴇʀɪᴇs, sᴏ ɪᴛ ᴄᴀɴ ɴᴏᴛ ᴅɪsᴘʟᴀᴄᴇ ᴄᴏᴘᴘᴇʀ ғʀᴏᴍ ᴄᴏᴘᴘᴇʀ sᴜʟᴘʜᴀᴛᴇsᴏʟᴜᴛɪᴏɴ.

5) ᴛʜᴇ ʀɪʙʙᴏɴ ʙᴜʀɴs ᴡɪᴛʜ ᴀ ʙʀɪɢʜᴛ ᴡʜɪᴛᴇ ʟɪɢʜᴛ. ɪɴᴛᴇɴsᴇ ʜᴇᴀᴛ ɪs ᴀʟsᴏ ᴘʀᴏᴅᴜᴄᴇᴅ ɪɴ ᴛʜɪs ʀᴇᴀᴄᴛɪᴏɴ. ʜᴇʀᴇ, ᴡʜᴇɴ ᴍᴀɢɴᴇsɪᴜᴍʙᴜʀɴs, ɪᴛ ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴛʜᴇ ᴏxʏɢᴇɴ ғᴏᴜɴᴅ ɪɴ ᴀɪʀ ᴛᴏ ғᴏʀᴍ ᴀ ᴘᴏᴡᴅᴇʀʏ ᴀsʜ ᴄᴀʟʟᴇᴅᴍᴀɢɴᴇsɪᴜᴍ ᴏxɪᴅᴇ. ᴄʜᴇᴍɪᴄᴀʟ ᴇǫᴜᴀᴛɪᴏɴ:ᴍᴀɢɴᴇsɪᴜᴍ ᴘʟᴜs ᴏxʏɢᴇɴ ɢɪᴠᴇsᴍᴀɢɴᴇsɪᴜᴍ ᴏxɪᴅᴇ.