In the extraction of copper, the slag formed in the blast furnace

The time for half life of a first order reaction is 1 hour. What is the time taken for 87.5% completion of the reaction

For the reaction H₂(g)+I₂(g)⇔2HI(g) at 721 K,the value of equilibrium constant K_C is 50.The value of K_P under the same conditions will be

Which of the following brings about dry bleaching

148mg of Ca(OH)₂ is required to remove hardness of one lit. of hard water by Clarke’s process. If hardness is due to only calcium bicarbonate, what is the degree of hardness of sample of water?

The addition of HCl will not suppress the ionization of

The weakest acid among the following is

Ultrapure elements are obtained in the following method of metal refining

In dry cell cathode is

Three faradays of electricity are passed through molten Al₂O₃, aqueous solution of CuSO₄ and molten NaCl taken in three different electrolytic cells. The amount of Al,Cu and Na deposited at the cathodes will be in the ratio of