Home
Class 12
CHEMISTRY
(i) You are provided with two test tubes...

(i) You are provided with two test tubes containing an aqueous solution of carbonateand sulphite respectively. How will you identify them?
(ii) A colourless salt on heating, forms a white sublimate on the cooler sides of the lost tube. The gas evolved is colourless and has a pungent smell. It givos donse white fumes when a rod dipped in conc. HCl is brought near the mouth of the fest tube. Identify the basic radical present in the salt.

Text Solution

Verified by Experts

(i)On addition of `KnMO_4` to sulphite salt, decolourization is observed `2MnO_(4)+5SO_(3)^(2-)+6Hto2Mn^(2+)+5SO_(4)^(2-)+3H_(2)O`
Carbonate salt solution does not react hence, there will be no decolourization (Acidified `Cr_2O_(7)^(2-)` may also be used instead of acidified `MnO_(4)` solution).
(ii) The Formation of a white sublimate and the evoltion of a colorless pungent smelling gas indicate the presence of ammounium Ion in the salt.
`NH_(4)^(+)toNH_(3)+H`
`NH_3+conc.HCIto NH_4Cl`(white sublimate compound)
Promotional Banner

Similar Questions

Explore conceptually related problems

A gas which gives dense white fumes with rod dipped in HCl.

What do you observe when rod dipped in HCl is brought near ammonia ?

White thick fumes are formed when a glass rod dipped in NH_4OH is brought near the mouth of a bottle full of HCl gas. Explain why ?

What is observed when Glass rod dipped in ammonium hydroxide is brought near to the mouth of the concentrated hydrochloric acid bottle.

Two colourless gases on mixing formed dense white fumes. These are :

When BeCl_(2) is hydrolysed, white fumes of gas are given out. The intensity of fumesintensifies when a rod dipped in moist ammonia is brought near the mouth of the test tube. The gas which comes out during hydrolysis is

A colourless gas with smell of rotten fish is

You are provided with three test tubes A, B and C which contain distilled water, acidic solution and basic solution respectively. If you are given blue litmus paper only, how will you identify the contents of each test tube ?

Write short answers for the following : What do you observe when rod dipped in HCl is brought near ammonium hydroxide solution

Give reason for each of the following: A white thick fume is formed when a glass rod dipped in concentrated hydrochloric acid is brought near the mouth of a bottle full of ammonia gas.