You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Potassium Permanganate

A metal carbo...

Question

A metal carbonate, on being heated strongly gives a solid that forms a green solid with $C o O$ . In which analytical group will the cation be precipitate and what will be the colour of the precipitate?

Group I, white

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Group II, yellow

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Group III, white

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Group IV, white

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Group IV, white
ZnO forms a green solid with CoO.
$Z n O + C o O \to C o Z n O_{2} cobalt zincate (green)$
ZnO is obtained when zinc carbonate is heated.
$Z n C O_{3} Δ - \to Z n O + C O_{2}$
$Z n^{2 +}$ belongs to fourth group. It is precipitated as white precipitate of ZnS (zinc sulphide) that is insoluble in ammonium hydroxide.

Suggest Corrections

Similar questions

Q. A white powder solid A forms a light green solution with water, which on treatment with potassium hexacyanoferrate(III) gives a blue precipitate. On being strongly heated, A leaves a
brown residue and forms a mixture of two gaseous oxides, which turns a dichromate solution
green and forms a white precipitate with a

B a C l_{2}

solution containing concentrated HCl. A is:

Q. A white crystalline solid

A

on dissolving in water forms a neutral solution. When solid

A

is heated with calcium hydroxide, it gives off colourless gas

B

having a sharp biting smell. The gas fumes very strongly in the air and turns red litmus blue. The aqueous solution of

A

on treating with lead acetate solution forms a white precipitate

C

. The precipitate is insoluble in all acids.
i) Name the anion present in solid

A

.
ii) Name the solid

A

and write its chemical formula.
iii) Name the white precipitate

C

.
iv) Write one chemical test for the identification of gas

B

.
v) Name the colourless gas

B

Q. A white crystalline solid give following chemical test: ' X'
(i) It liberates CO2 with

N a H C O_{3}

(ii) It forms a coloured dye on diazotization and coupling with

β

-Naphthol
(iii) With

B r_{2}

water it forms white precipitate of 2, 4, 6 – tribromo aniline. ‘X’ can be identified as:

Q. Two solid laboratory reagents (A) and (B) gives the following reactions:
Compound (A):
(i) on strongly heating gives two oxides of sulphur
(ii) on adding aqueous NaOH solution to its aqueous solution, a dirty green precipitate is obtained which starts turning brown on exposure to air
Compound (B) :
(iii) imparts green colour to the flame
(iv) Its solution does not give a precipitate on passing

H_{2} S

(v) When it is heated with solid

K_{2} C r_{2} O_{7}

and concentrated

H_{2} S O_{4}

, a red gas is evolved. The gas when passed in an aq NaOH solution turns it yellow
Compound (A) and (B) are identified as

F e S O_{4}

and

B a C l_{2}

.
If true enter 1, else enter 0.

Select the correct answers :

(a) Colour of an aqueous solution of copper sulphate is

(i) Green (ii) Brown (iii) Blue (iv) Yellow

(b) Colour of the precipitate formed on adding $N a O H$ solution to iron (II) sulphate solution is

(i) White (ii) Brown (iii) Green (iv) Pale blue

(i) Iron (ii) Magnesium (iii) Zinc (iv) Copper

Join BYJU'S Learning Program

A metal carbonate, on being heated strongly gives a solid that forms a green solid with CoO. In which analytical group will the cation be precipitate and what will be the colour of the precipitate?

A metal carbonate, on being heated strongly gives a solid that forms a green solid with $C o O$ . In which analytical group will the cation be precipitate and what will be the colour of the precipitate?