On heating blue coloured powder of copper nitrate in a boiling tube, copper oxide(black) oxygen gas and a brown gas X is formed Identify the brown gas X evolved

On heating blue coloured powder of copper nitrate in a boiling tube, copper oxide(black) oxygen gas and a brown gas X is formed Write a balanced chemical equation of the reaction.

A student performed the experiment of heating ferrous sulphate crystals in a boiling tube. He smell fumes of a pungent gas saw colours of ferrous sulphate disappear Identify the nature of this chemical reaction.

On heating copper powder in air, the surface of copper powder becomes coated with black CuO. How can this black be converted into brown copper? Write chemical equation for the reaction that occurs during the colour change.

A student performed the experiment of heating ferrous sulphate crystals in a boiling tube. He smell fumes of a pungent gas saw colours of ferrous sulphate disappear Write the chemical formula of the pungent gas

A student performed the experiment of heating ferrous sulphate crystals in a boiling tube. He smell fumes of a pungent gas saw colours of ferrous sulphate disappear Why does the colour of crystals disappear?

When conc. H_2SO_4 was added to an unknown salt present in a test tube, a brown gas (A) was evolved. The gas intensified when copper turnings were also added into this test tube. On cooling the gas A changed into a colourless gas (B). Write the equations for the reactions involved.

An orange solid A on heating gives a colourless gas B. The gas B in dry conditions is Passed Over heated Ca to give a solid C. The solid C further reacts with water to Produce gas D which forms a blue coloured compound E on reaction with copper sulphate solution. Identify A, B,C,D,E and give the sequence of reactions involved .

Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below. Write a balanced chemical equation for the reaction taking place.

A shiny brown coloured element X on heat in air becomes black in colour. Name the element 'X' the black coloured compound formed.