NEETChemistryp Block Elements (Group 15, 16, 17 & 18)
Match List-I with List-II, match the gas evolved during each reaction. List-I List-II A NH 4 2 Cr 2 O 7 ⟶ Δ I H 2 B KMnO 4 + HCl → II N 2 C Al + NaOH + H 2 O → III O 2 D NaNO 3 ⟶ Δ IV Cl 2 Choose the correct answer from the options given below
Options
- AA - II , B - III , C - I , D - IV
- BA - III , B - I , C - IV , D - II
- CA - II , B - IV , C - I , D - III
- DA - III , B - IV , C - I , D - II
Correct answer
C. A - II , B - IV , C - I , D - III
Step-by-step solution
Thermal decomposition of ammonium dichromate ( NH 4 ) 2 Cr 2 O 7 on heating gives N 2 , Cr 2 O 3 and H 2 O as follows: NH 4 2 Cr 2 O 7 → ∆ N 2 + Cr 2 O 3 + 4 H 2 O 2 KMnO 4 s + 16 HCl aq → 2 KCl aq + 2 MnCl 2 aq + 8 H 2 O l + 5 Cl 2 g The reaction of Aluminium with Sodium hydroxide ( Al + NaOH ) gives a salt and Hydrogen gas. 2 Al s + 2 NaOH l + 6 H 2 O l → 2 Na Al OH 4 s + 3 H 2 l On heating sodium nitrate it undergoes decomposition reaction and liberates oxygen and convert into sodium nitrite.