Home
Class 12
CHEMISTRY
An aqueous solution of salt containing a...

An aqueous solution of salt containing an acidic radical `X`-reacts with sodium hypochlorite in neutral medium. The gas evolved produces blue black colour spot on the starch paper.The anion `X^(-)` is:

A

`CH_(3)CO O^(-)`

B

`Br^(-)`

C

`l^(-)`

D

`NO_(2)^(-)`s

Text Solution

Verified by Experts

The correct Answer is:
C
`Ocl^(-) +3l^(-)+H_(2)O to l_(3)^(-)+2OH^(-)+Cl^(-)`
`l_(3)^(-) + "starch" to ` blue -black spot on starch paper appears due to the formation of iodine-starch adsorption complex.
Promotional Banner

Topper's Solved these Questions

  • QUALITATIVE ANALYSIS (ANION)

    RESONANCE ENGLISH|Exercise Match The Column|1 Videos

  • QUALITATIVE ANALYSIS (ANION)

    RESONANCE ENGLISH|Exercise Single And Double Value Integer Type|3 Videos

  • QUALITATIVE ANALYSIS (ANION)

    RESONANCE ENGLISH|Exercise Part-II : National Standard Examination IN|8 Videos

  • QUALITATIVE ANALYSIS

    RESONANCE ENGLISH|Exercise INORGANIC CHMISTRY(Qualitative analysis)|35 Videos

  • QUALITATIVE ANALYSIS PART 1

    RESONANCE ENGLISH|Exercise A.L.P|39 Videos

Similar Questions

Explore conceptually related problems

An aqueous solution of a mixture of two inorganic salts when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate (P) was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H_(2)S in a dilute mineral acid medium. However, it gave a green precipitate (R) in with H_(2)S in ammoniacal medium. The precipitate (R) gave a coloured solution (S), when treated with H_(2)O_(2) in an aqueous NaOH medium. The coloured solution (S) contains

An aqueous solution of a mixture of two inorganic salts when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate (P) was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H_(2)S in a dilute mineral acid medium. However, it gave a green precipitate (R) H_(2)S in an ammoniacal medium. The precipitate (R) gave a coloured solution (S), when treated with H_(2)O_(2) in an aqueous NaOH medium. The precipitate P contains

The aqueous solution of transition metal salt changes colour from pink to blue, when concentrated hydrochloric acid is added to it. The changes in colour is due to:

The aqueous solution of transition metal salt changes colour from pink to blue, when concentrated hydrochloric acid is added to it. The changes in colour is due to:

An aqueous solution of salt (A) gives a give a white precipitate ( B) with sodium chloride solution . Compound ( B) dissolves in hot water and the solution on treatment with sodium iodide give a yellow precipitate ( D) ,. and on passing H_2 S through solution ( B) gives a black ppt . (C) . Compound (A) does not give any gas with dil HCl , but liberates a reddish brown gas on heating identify compounds (A), (B), ( C) , and (D) .

Solution of a salt in dil H_(2)SO_(4) produces deep blue colour with starch iodide solution .The salt contains

A salt X is formed and a gas is evolved when ethanoic acid reacts with sodium hydrogen carbonate. Name the salt X and the gas evolved. Describe an activity and draw the diagram of the apparatus to prove that the evolved gas is the one which you have named. Also, write the chemical equation of the reaction involved.

Statement-1:A solution containing S^(2-) ions gives purple/violet colour with sodium nitroprusside solution in alkaline medium. Statement-2 :Sodium sulphide gives black precipitate with silver nitrate solution.

A coloured solution known to contain two metal ions, was treated with excedss cold sodium hydroxide solution. When filtered a whitish solid, slowly changing to brown, was retained on the filter paper and a colourless solution collected as the filtrate. dropwise addition of hydrochloric acid to the filtrate produced a white ppt. which dissolved in excess acid. treatment of the residue on filter paper with a solution of strong oxidier produced a reddishh-violet solution.. indicate any pairs of ions:

Give reasons for the following An aqueous solution of the salt ammonium chloride is acidic in nature while an aqueous solution of sodium chloride is neutral.