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Hydrogen is the most abundant element in the universe, making up ~75% of all matter.
Match the following:
Column I Column II (a) pure nitrogen (i) Chlorine (b) Haber process (ii) Sulphuric acid (c) Contact process (iii) Ammonia (d) Deacon’s process (iv) Sodium azide or Barium azide
medium
Amines
2019
chemistry
(a)-(i) (b)-(ii) (c)-(iii) (d)-(iv)
(a)-(ii) (b)-(iv) (c)-(i) (d)-(iii)
(a)-(iii) (b)-(iv) (c)-(ii) (d)-(i)
(a)-(iv) (b)-(iii) (c)-(ii) (d)-(i) Explanation To solve this problem, we need to match each process or substance with its corresponding product or reactant. Let's analyze each pair: \\ • (a) Pure nitrogen is produced from sodium azide or barium azide. When sodium azide ( ( ( NaN 3 ) _3) 3 ) or barium azide ( ( ( Ba(N 3 ) 2 ) _3)_2) 3 ) 2 )
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decomposes, it releases nitrogen gas:
2NaN
3 → 2 N a + 3 _3 \rightarrow 2Na + 3 3 → 2 N a + 3 N
Therefore, (a) matches with (iv).
• (b) The Haber process is used to synthesize ammonia from nitrogen and hydrogen gases:
N
H
NH
Therefore, (b) matches with (iii).
• (c) The Contact process is used for the industrial production of sulphuric acid:
2SO
2 + O 2 → V 2 O 5 2 S O 3 _2 + O_2 \xrightarrow{{V}_2{O}_5} 2SO_3 \\ 2 + O 2 V 2 O 5 2 S O 3 SO
3 + H 2 O → H 2 S O 4 _3 + H_2O \rightarrow H_2SO_4 \\ 3 + H 2 O → H 2 S O 4 Therefore, (c) matches with (ii).
• (d) Deacon’s process is used to produce chlorine from hydrogen chloride and oxygen:
4HCl + O
2 → 2 C l 2 + 2 H 2 O _2 \rightarrow 2Cl_2 + 2H_2O \\ 2 → 2 C l 2 + 2 H 2 O Therefore, (d) matches with (i).
Now, let's match these findings with the given options:
Option 1: (a)→(i), (b)→(ii), (c)→(iii), (d)→(iv)
Option 2: (a)→(ii), (b)→(iv), (c)→(i), (d)→(iii)
Option 3: (a)→(iii), (b)→(iv), (c)→(ii), (d)→(i)
Option 4: (a)→(iv), (b)→(iii), (c)→(ii), (d)→(i)
The correct matching is:
(a)→(iv), (b)→(iii), (c)→(ii), (d)→(i)
Therefore, the correct option is 4.