Question

Identifypure substance and mixture
b) carbon dioxide .
a) Tin​

Answer 1

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1) ᴄᴀʀʙᴏɴ ᴅɪᴏxɪᴅᴇ ɪs ᴀ ᴍɪxᴛᴜʀᴇ.

ᴇxᴘʟᴀɴᴀᴛɪᴏɴ :- For example, carbonated drinks have carbon dioxide dissolved in water, making a homogeneous mixture. Water is a chemical substance that contains only molecules made of two hydrogen atoms and one oxygen atom, so it's a compound. Table salt crystals are made of sodium and chlorine atoms in a one-to-one ratio.

2) ᴛɪɴ ɪs ᴀ ᴘᴜʀᴇ sᴜʙsᴛᴀɴᴄᴇ.

ᴇxᴘʟᴀɴᴀᴛɪᴏɴ :- Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances.