JEE Main 202624 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 24 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Haloalkanes and Haloarenes
JEE Main 2026 · 24 January · Evening Shift · Chemistry · Haloalkanes and Haloarenes
Grignard reagent RMgBr(P) reacts with water and forms a gas (Q)....
Grignard reagent reacts with water and forms a gas (Q). One gram of Q occupies at STP. (P) on reaction with dry ice in dry ether followed by forms a compound (Z). 0.1 mole of (Z) will weigh g. (Nearest integer)
Correct answer
0
Step-by-step solution
Grignard reagent RMgBr reacts with water to produce gas Q.
One gram of Q occupies 1.4 L at STP.
Moles of Q = 1.4/22.4 = 0.0625 mol, so molar mass = 1/0.0625 = 16 g/mol, identifying Q as CH₄.
Thus P = CH₃MgBr.
When P reacts with dry ice: .
Upon treatment with H₃O⁺, this gives Z = CH₃COOH (acetic acid).
Molar mass of Z = 60 g/mol.
Mass of 0.1 mol = 0.1 × 60 = 6 g.
One gram of Q occupies 1.4 L at STP.
Moles of Q = 1.4/22.4 = 0.0625 mol, so molar mass = 1/0.0625 = 16 g/mol, identifying Q as CH₄.
Thus P = CH₃MgBr.
When P reacts with dry ice: .
Upon treatment with H₃O⁺, this gives Z = CH₃COOH (acetic acid).
Molar mass of Z = 60 g/mol.
Mass of 0.1 mol = 0.1 × 60 = 6 g.