When gas `(A)` is passed through dry `KOH` at low temperature, a deep red coloured compound `(B)` and a gas `(C)` are obtained. The gas `(A)`, on reaction with but`-2-`ene, followed by treatment with `Zn//H_(2)O` yields acetaldehyde. Identify `(A),(B)`, and `(C)`.

When H_2S gas in passed through nitric acid, the product is :

Zinc on reaction with NaOH gives a salt (A) along with a gas (B). (A) on reaction with H_(2)S gas gives a white precipitate (C ). Identify (A), (B) and (C ).

When SO_2 gas is passed through acidified K_2Cr_2O_7 solution, the colour of the solution changes to

When a brown compound of manganese (A) is treated with HCl it gives a gas (B). The gas taken in excess, reacts with NH_(3) to give an explosive compound (C ). Identify compound A, B and C.

When dry chlorine gas is passed through silver chlorate heated to 90^@C , then which of the oxides of chlorine is obtained ?

When H_(2)S gas is passed through ZnCl_(2) solution. ZnS is not precipitated, why?

A compound (A) is a sodium salt of dibasic acid and on electrolysis gives a gas (B), gas CO_(2) at anode, and H_(2)(g) at cathode. Gas (B) does not give any test for unsaturation, i.e., it does not decolourise Br_(2) water solution and aqueous KMnO_(4) solution. Gas (B) on reaction with (H_(2)+Pt) at room temperature does not react but at 120^(@)C , gas (B) gives butane. Identfy (A) and (B)

Write the product when Chlorine gas is passed through H2S.

alkali metal (A) on flame test gives a crimson red colour to the Bunsen flame. (A) on heating in air gives compound (B), and (B) further on hydrolysis gives (C ) and gas (D). Gas (D) with Nessler's reagent gives a brown precipitate Identify (A), (B), (C ) and (D).

When SO_2 gas is passed through an acidified solution of K_2 Cr_2 O_7 , the solution turns ___ in colour.