75% of first order reaction is completed in 32 minutes 50% of the reaction would have been completed in

Resonance in benzene is accompanied by delocalization of π –electrons. Each π electron is attached with

The following is a reversible reaction

Vicinal dihalide (C₂H₄Br₂) on heating with excess alc.KOH and Zinc dust gives ’y’ and ‘z’ respectively. Both ‘y’ and ’z’ on oxidation with Bayer’s regent gives A and B.A and B respectively are

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