Question

identify one cation and one anion in the given unknown salt M1 by performing dry test.

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Answer 1

Answer:

Explanation:

a) Colourless, odourless gas with brisk effervescence (CO2) which

turn lime water milky.

b) Colourless gas with rotten egg like smell (H2S) which turns lead

acetate paper black.

c) Colourless gas with smell of burning sulphur (SO2) which turns

acidified dichromate paper green.

d) Brown coloured gas (NO2) which turns ferrous sulphate solution

black or brown.

e) Colourless gas with vinegar like smell.



2 CO3

(Carbonate)



2

S

(sulphide)



2

SO3

(Sulphite)

 NO2

(Nitrite)

CH3COO-

(Acetate)

B Conc. H2SO4 a) Colourless pungent smelling gas (HCl) which gives white dense

fumes with glass rod dipped in NH4OH.

b) Violet coloured vapours (I2) which turns starch paper blue.

c) Reddish brown gas (NO2) having pungent smell (On adding

copper turning, fumes becomes intense)

d) Brown colour gas with pungent smell (Br2) which turns starch

paper yellow.

e) Colourless, odourless gas with brisk effervescence

(CO + CO2) which turns lime water milky and burns on the mouth

of test tube with blue flame.