Verified Solution • 2025–26 Session moderate

QJEEM22Ch2531: JEE Main 2022 Chemistry - Class 12 JEEM22Ch2531 Solution: Match List - I with List - II, match the gas evolved during…

Match List - I with List - II, match the gas evolved during each reaction.

List - I List - II
(A) (NH4)2Cr2O7⟶Δ (I) H2
(B) KMnO4+HCl→ (II) N2
(C) Al+NaOH+H2O→ (III) O2
(D) NaNO3⟶Δ (IV) Cl2

Choose the correct answer from the options given below :

Multiple Choice Options

  • A (A)−(II),(B)−(III),(C)−(I),(D)−(IV)
  • B (A)−(III),(B)−(I),(C)−(IV),(D)−(II)
  • C (A)−(II),(B)−(IV),(C)−(I),(D)−(III)
  • D (A)−(III),(B)−(IV),(C)−(I),(D)−(II)

Step-by-Step Verified Solution

(NH4)2Cr2O7⟶ΔN2+4H2O+Cr2O3\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}+\mathrm{Cr}_{2} \mathrm{O}_{3}

KMnO4+HCl⟶KCl+MnCl2+Cl2+H2O\mathrm{KMnO}_{4}+\mathrm{HCl} \longrightarrow \mathrm{KCl}+\mathrm{MnCl}_{2}+\mathrm{Cl}_{2}+\mathrm{H}_{2} \mathrm{O}

Al+NaOH+H2O⟶Na(Al(OH)4)+H2\mathrm{Al}+\mathrm{NaOH}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{Na}\left(\mathrm{Al}(\mathrm{OH})_{4}\right)+\mathrm{H}_{2}

2NaNO3( s)⟶Δ2NaNO2( s)+O22 \mathrm{NaNO}_{3}(\mathrm{~s}) \stackrel{\Delta}{\longrightarrow} 2 \mathrm{NaNO}_{2}(\mathrm{~s})+\mathrm{O}_{2}

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