Explain the following:
A metal 'X' acquires a green colour coating on outer surface on exposure to air

Which of the following metal of found in green colouring pigment chlorophyll of plants ?

Explain the following: What are the properties of metals and Non-metals?

Explain the following: Name and write chemical formula of the green coating formed on the metal.

Answer the following questions : Explain the perception of colour in the human eye .

Explain the following reactions with the help of balanced equations: Carbon burns in air

Explain the following terms (iv) oxidation state of metal ion.

Explain the following: Can we permanently prevent the rusting of an iron article by applying a layer of paint on its surface?

Explain the following: How is the mehotd of extraction of metlas high up in the reactivity series different form that for metals in the middle?Why the same process cannot be applied for them? Explaining by giving equaiton,the extraction sodium.

Metals get attacked by substances around it such as moisture, acids, etc. Metal is said to 'corrode' due to this attack and the process is called corrosion. Many metals like iron, copper, silver, etc. get corroded. When iron is exposed to moist air, it undergoes corrosion and a reddish brown coloured solid layer is formed on its surface. Corrosion of iron, which is known as rusting, is a serious problem as enormous amount of money is spent every year to replace damaged iron. Similarly, copper reacts with moisture and. CO_(2) in air to form a green coloured coating of basic copper carbonate on its surface. Silver acquires a black colour when exposed to air containing H_(2)S due to the formation of silver sulphide on its surface. Based on the above paragraph, answer the following question. What happens to silver ornaments if they are exposed to air containing H_(2)S gas?