Match List I with List II List I List II (Anion) (gas evolved on reaction with dil H2SO4) A. CO32- I. Colourless gas which turns lead acetate paper black B. S2- II. Colourless gas which turns acidified potassium dichromate solution green C. SO32- III. Brown fumes which turns acidified Kl solution containing starch blue. D. NO2- IV. Colourless gas evolved with brisk effervescence, which turns lime water milky Choose the correct answer from the option given below:

A. N a 2 C O 3 S a l t + H 2 S O 4 d i l → N a S O 4 + H 2 O + C O 2 ↑ CO2 is colourless gas with brisk effervescence and turns lime water milky C O 2 + C a ( O H ) 2 → C a C O 3 ↓ + H 2 O B. N a 2 S S a l t + H 2 S O 4 d i l → N a 2 S O 4 + H 2 S ↑ H2S + (CH3COO)2Pb → P b S B l a c k + 2 C H 3 C O O H C. N a 2 S O 3 S a l t + H 2 S O 4 d i l → N a 2 S O 4 + H 2 O + S O 3 ↑ SO3 is colourless gas which turns acidified potassium dichromate solution green as S O 3 + K M n O 4 + H + → M n S O 4 G r e e n + S O 4 2 − + H 2 O D. 2 N a N O 2 S a l t + H 2 S O 4 d i l → N a 2 S O 4 + 2 H N O 2 3 H N O 2 → N H O 3 + 2 N O + H 2 O 2 N O + O 2 → 2 N O 2 B r o w n g a s 2 H N O 2 + 2 K l + 2 C H 3 C O O H → 2 C H 3 C O O K + 2 H 2 O + 2 N O + I 2 I2 + starch → Blue colour complex.

Match List I with List II

List I

List II

(Anion)

(gas evolved on reaction with dil H₂SO₄)

A.

CO₃^2-

I.

Colourless gas which turns lead acetate paper black

B.

S²^-

II.

Colourless gas which turns acidified potassium dichromate solution green

C.

SO₃²-

III.

Brown fumes which turns acidified Kl solution containing starch blue.

D.

NO₂^-

IV.

Colourless gas evolved with brisk effervescence, which turns lime water milky

Choose the correct answer from the option given below:

Option 1 - A-III, B-I, C-II, D-IV

Option 2 - A-II, B-I, C-IV, D-III

Option 3 - A-IV, B-I, C-III, D-II

Option 4 - A-IV, B-I, C-II, D-III

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Answered by

Payal Gupta | Contributor-Level 10

11 months ago

Correct Option - 4

Detailed Solution:

A. $\underset{S a l t}{N a_{2} C O_{3}} + \underset{d i l}{H_{2} S O_{4}} \to N a S O_{4} + H_{2} O + C O_{2} ↑$

CO₂ is colourless gas with brisk effervescence and turns lime water milky

$C O_{2} + C a {(O H)}_{2} \to C a C O_{3} ↓ + H_{2} O$

B. $\underset{S a l t}{N a_{2} S} + \underset{d i l}{H_{2} S O_{4}} \to N a_{2} S O_{4} + H_{2} S ↑$

H₂S + (CH₃COO)₂Pb → $\underset{B l a c k}{P b S} + 2 C H_{3} C O O H$

C. $\underset{S a l t}{N a_{2} S O_{3}} + \underset{d i l}{H_{2} S O_{4}} \to N a_{2} S O_{4} + H_{2} O + S O_{3} ↑$

SO₃ is colourless gas which turns acidified potassium dichromate solution green as

List I		List II
(Anion)		(gas evolved on reaction with dil H₂SO₄)
A.	CO₃^2-	I.	Colourless gas which turns lead acetate paper black
B.	S²^-	II.	Colourless gas which turns acidified potassium dichromate solution green
C.	SO₃²-	III.	Brown fumes which turns acidified Kl solution containing starch blue.
D.	NO₂^-	IV.	Colourless gas evolved with brisk effervescence, which turns lime water milky