Question

B part fast ... no spams.... answer will be deleted if wrong..... need quick answer...​

Answer 1

The materials can be grouped on the basis of similarities or differences in their properties. Grouping helps in gaining systematic knowledge of things. It also gives a general idea about all members of a group and the differences between members of different groups.

★ᴘʟᴇᴀsᴇ ᴍᴀʀᴋ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ ᴀɴsᴡᴇʀ ᴀɴᴅ ғᴏʟʟᴏᴡ ᴍᴇ!!