JEE Main 202622 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 22 January
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Some Basic Concepts of Chemistry
JEE Main 2026 · 22 January · Morning Shift · Chemistry · Some Basic Concepts of Chemistry
In the reaction, 2 Al(s)+6 HCl(aq) arrow 2 Al^ 3+ (aq)+6 Cl^ -...
In the reaction,
Options
- A at STP is produced for every mole of HCl consumed.
- B is produced regardless of temperature and pressure for every mole of Al that reacts.
- C is consumed for every produced.
- D at STP is produced for every mole of Al that reacts.
Correct answer
A. at STP is produced for every mole of HCl consumed.
Step-by-step solution
Reaction:
Checking each option:
(1) Per 1 mole HCl: From stoichiometry, 6 mol HCl produces 3 mol H₂, so 1 mol HCl produces 0.5 mol H₂ = 11.2 L at STP. TRUE
(2) Per 1 mole Al: 2 mol Al produces 3 mol H₂, so 1 mol Al produces 1.5 mol H₂ = 33.6 L at STP only, not regardless of T and P. FALSE
(3) Volume ratio at same T,P: 6 mol HCl : 3 mol H₂ = 2:1, so 12 L HCl : 6 L H₂. TRUE
(4) Per 1 mole Al: 1.5 mol H₂ = 33.6 L, not 67.2 L. FALSE
Option (1) is correct.
Checking each option:
(1) Per 1 mole HCl: From stoichiometry, 6 mol HCl produces 3 mol H₂, so 1 mol HCl produces 0.5 mol H₂ = 11.2 L at STP. TRUE
(2) Per 1 mole Al: 2 mol Al produces 3 mol H₂, so 1 mol Al produces 1.5 mol H₂ = 33.6 L at STP only, not regardless of T and P. FALSE
(3) Volume ratio at same T,P: 6 mol HCl : 3 mol H₂ = 2:1, so 12 L HCl : 6 L H₂. TRUE
(4) Per 1 mole Al: 1.5 mol H₂ = 33.6 L, not 67.2 L. FALSE
Option (1) is correct.