How `K_2Cr_2O_7` is prepared? Write the necessary reactions involved.

How ethanol is prepared from molasses? Write the various reactions involved?

How aceteleyne is prepared commercially? Write the necessary chemical equation involved

What will happen when lead nitrate is strongly heated? Write the necessary reaction.

How pure N_2 gas is prepared in laboratory? Write the necessary equation for the reaction.

How nitric acid is prepared by Ostwald method? Write the necessary reactions?

How sodium carbonate is prepared in the laboratory? Write the reaction involved in the process.

How is nylon-6, 6 synthesised? Write the chemical equation for the reaction involved.

An organic compound X(C_2H_4O) , on oxi-dation, gives Y(C_2H_4O_2) . Compound (X) undergoes haloform reaction. On treatment with HCN, compound (X) produces Z which on hydrolysis, gives 2-Hydroxypropanoic acid. Write the equation for the reactions involved. What happens when X is treated with dilute NaOH?

Write the preparation of XeF_2 ?

How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.