Question

i) Why mineral water is a mixture and not a compound? ii) Consider the iron and sulphur are mixed together, what will be the appearance of iron and sulphur? How iron sulphide is formed? iii) Which is the most common element in the air? iv)Name two different type of metal mixtures an their composition. v) Explain particle morale of matter with reference to mixtures.

Answer 1

Answer:

Good Question

Explanation:

Answer 2

Answer:

1. The molecular formula of water H20 which has two different elements Hydrogen(H) and Oxygen(O). So, it is a compound. A mixture is a composition of two substances i.e. a solute and a solvent, which together makes a solution. But water is not a mixture as there are no two different substances mixed with each other.
2. On heating the reaction mixture, the sulfur melts and reacts with the iron exothermically to form iron(II) sulfide. ... The signs that a chemical reaction occurs are: the glow, and the fact that a new substance (black iron sulfide) is formed which cannot be separated by using a magnet.
3. The order of elements by volume-fraction (which is approximately molecular mole-fraction) in the atmosphere is nitrogen (78.1%), oxygen (20.9%), argon (0.96%), followed by (in uncertain order) carbon and hydrogen because water vapor and carbon dioxide, which represent most of these two elements in the air, are variable .
4. Alloy Mixture

• Aluminum, nickel, and cobalt (Alnico)
• Nickel, manganese, aluminum, and silicon (Alumel)
• Copper and arsenic (Arsenical copper)
• Copper and silver (Billon)
• Zinc and copper (Brass)
• Silver and copper (Britannia silver)
• Nickel and chromium (Chromel)
• Copper and nickel (Constantan)

    5.In chemistry, a mixture is a material made up of two or more different substances which are physically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.