A mixture containing sulphides of copper and iron is called …………….

25 mL of a mixture containing nitrogenn and nitric oxide is passed over heated copper. The volume of gaseous mixture becomes 20 mL. what is the percentage composition of the original mixture. [all volumes are measrued at the same temperature].

RNA containing viruses are called

In germinating castor seeds, the R.Q. is or A mixture containing equal quantity of germinating maize and groundnut seeds are taken. The RQ of this mixture would be

When an iron wire of diameter 1 cm is copper plated uniformly. Resistance of iron reduces to 1/3 of its original value. Calculate the thickness of copper plating, Resistivities of copper and iron are 1.8 times 10^-6 Omega .cm and 1.98 times 10^-5 Omega .cm respectively.

When concentrated sulphuric acid is added to an inorganic mixture containing chloride ,we get colourless pungent smelling gas HCI, but if the mixture contains bromide then we get red vapour of bromine .Why?

In metallurgy, the sulphide ore of copper is partly roasted. Why?

State with equations, what happens when (any five) : (6) A mixture of cuprous sulphide and cuprous oxide is heated.

Microbodies containing oxidating enzymes is called ________

A mixture contains three amino acids. How can they be identified?

50 g of an alloy containing 80% copper and 20% silver is heated up to t_(1)=80^(@)C and then dropped in a calorimeter of water equivalent W = 10 g containing m = 90 g of water at t_(2)=20^(@)C . What will be the final temerature of the mixture ? Specific heat capacity of copper and silver are s_(c)=0.09" cal.g"^(-1).^(@)C^(-1) and s_(s)="0.15 cal.g"^(-1).^(@)C^(-1) respectively.