Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas JEE Main2020ChemistryStates of MatterPractice

Calculate the number of hours of service that can be derived at 1 atm, 300 K from an acetylene lamp containing 640 g calcium carbide. Given that the lamp requires 50 L acetylene gas at 1 atm 300 K for one hour. [Take 0.0821 × 300 = 25]

Correct answer

5

Step-by-step solution

C a C 2 + 2 H 2 O → C a O H 2 + C 2 H 2 moles of C a C 2 = 640 64 = 10 ∴ moles of C 2 H 2 formed = 10 ∴ V C 2 H 2 = 10 × 0.0821 × 300 = 250 Litres ∴ number of hours = 250 50 = 5

Practice States of Matter on Quantrex Academy →

More from States of Matter

Two cylinders, both fitted with frictionless pistons, are filled with mixtures of He and Ar gases. In the first cylinder, the masses of He and Ar are m₁ and m₂ , respectively. In t 2026Molar volume (V_m ) of a van der Waals gas can be calculated by expressing the van der Waals equation as a cubic equation with V_m as the variable. The ratio (in mol dm ⁻³ ) of the 2025At the sea level, the dry air mass percentage composition is given as nitrogen gas : 70.0, oxygen gas : 27.0 and argon gas : 3.0. If total pressure is 1.15 atm , then calculate the 2025For a reaction, N ₂ O _ 5( ~g ) 2 NO _ 2( ~g ) + 1 2 O _ 2( ~g ) in a constant volume container, no products were present initially. The final pressure of the system when 50 % of r 2025A closed vessel contains 10 ~g of an ideal gas X at 300 ~K , which exerts 2 atm pressure. At the same temperature, 80 ~g of another ideal gas Y is added to it and the pressure beco 2024A gas has a compressibility factor of 0 . 5 and a molar volume of 0 . 4 dm 3 mol - 1 at a temperature of 800 K and pressure x atm . If it shows ideal gas behaviour at the same temp 2023A certain quantity of real gas occupies a volume of 0 . 15 dm 3 at 100 atm and 500 K when its compressibility factor is 1 . 07 . Its volume at 300 atm and 300 K (When its compressi 2023At 600 K , the root mean square ( rms ) speed of gas X (molar mass = 40 ) is equal to the most probable speed of gas Y at 90 K . The molar mass of the gas Y is _____ g mol – 2023 Full States of Matter list All NTA Abhyas JEE Main PYQs