Match List - I with List - II: List - I (Industrial process) (a) Haber's process (b) Ostwald's process (c) Contact process (d) Hall-Heroult process List - II (Application) (i) $\ce{HNO3}$ synthesis (ii) Aluminium extraction (iii) $\ce{NH3}$ synthesis (iv) $\ce{H2SO4}$ synthesis Choose the correct answer from the options given below:

JEE Main · 2021 · 16 Mar 2021 · Shift 1 · p-Block Elements

Match List - I with List - II:

List - I (Industrial process)
(a) Haber's process
(b) Ostwald's process
(c) Contact process
(d) Hall-Heroult process

List - II (Application)
(i)

HNO X_{3}

synthesis
(ii) Aluminium extraction
(iii)

NH X_{3}

synthesis
(iv)

H X_{2} SO X_{4}

synthesis

Choose the correct answer from the options given below:

Answer: A → III, B → I, C → IV, D → II

Solution

Haber's process combines dinitrogen and dihydrogen over a promoted iron catalyst at high pressure, and the product is ammonia.
Ostwald's process takes that ammonia, burns it over platinum gauze to nitric oxide, allows further oxidation to nitrogen dioxide and absorbs that in water, and the product is nitric acid.
The contact process oxidises

S O_{2}

S O_{3}

over

V_{2} O_{5}

and absorbs the trioxide in concentrated acid, and the product is sulphuric acid.
The Hall-Heroult process electrolyses alumina dissolved in molten cryolite between carbon electrodes, and the product is aluminium.
Haber's process pairs with

N H_{3}

synthesis, Ostwald's process with

HN O_{3}

synthesis, the contact process with

H_{2} S O_{4}

synthesis and the Hall-Heroult process with aluminium extraction.

JEE Main · 2021 · 16 Mar 2021 · Shift 1 · Match the columns

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JEE Main · 2021 · 16 Mar 2021 · Shift 1 · p-Block Elements

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