Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202226 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
26 June
Shift
Evening Shift
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Main 2022 · 26 June · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

The moles of methane required to produce 81g of water after...

The moles of methane required to produce 81g81g of water after complete combustion is____×10−2mol\times {10}^{- 2}mol. [nearest integer]

Correct answer

0

Step-by-step solution

CH4+2O2⟶CO2+2H2O{CH}_{4} + 2{O}_{2} ⟶ {CO}_{2} + 2{H}_{2}O

POAC on H atom

nCH4×4=nH2O×2{nCH}_{4} \times 4 = {nH}_{2}O \times 2

nCH4=8118×2×14=8136{nCH}_{4} = \dfrac{81}{18} \times 2 \times \dfrac{1}{4} = \dfrac{81}{36}

nCH4=2.25{nCH}_{4} = 2 . 25

=225×10−2= 225 \times {10}^{- 2}

Hence, the number of moles of methane is 225×10−2225 \times {10}^{- 2}

Practice Some Basic Concepts of Chemistry on Quantrex Academy →

More from Some Basic Concepts of Chemistry

Match List-I with List-II. List-I Mass of substance List-II Number of atoms A. 1.8 mg… JEE Main 2026Which of the following contain the same number of atoms ? (Given : Molar mass in g mol ^… JEE Main 2026An oxide of iron contains 69.9\% iron, its empirical formula, is: (Given: Molar mass of… JEE Main 2026What volume of hydrogen gas at STP would be liberated by action of 50 mL of H_2SO_4 of… JEE Main 2026How many grams of residue is obtained by heating 2.76 g of silver carbonate? (Given… JEE Main 2026The correct order of total number of atoms present in (A) 2 moles of cyclohexane (B) 684… JEE Main 2026Number of moles and number of molecules in 1.4187 L of SO_2 at STP respectively are: JEE Main 2026The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1 . It has two… JEE Main 2026 Full Some Basic Concepts of Chemistry list All JEE Main PYQs