In the extraction of iron from haematite,the charge used is haematite,coke and lime stone in the following weight ratio

The salt of phosphorous acid are called

pH of pure H₂O at 25⁰C is

Bauxite is boiled with aqueous NaOH solution. Sodium meta aluminate solution is formed. This part in the metallurgy of aluminium is called

A mixture of Boran trichloride and hydrogen is subjected to silent electric discharge to form ’A’ and HCl. ’A’ is mixed with NH₃ and heated to 200⁰ C to form B. The formula of B is

Ethylene reacts with Br₂ in CCl₄ to from X. When X is reacted with alcoholic KOH. Y is formed. Here X and Y are

The molar concentrations of A,B and C at equilibrium for the reaction A+2B⇔3C are 2,3 and 4 moles/lit respectively. Its Kc is

Which of the following is obtained in carbyl amine reaction from aniline

The magnetic oxide of iron is

The froth floatation process is used for the concentration of