JEE Main | 2026Hard
Question
80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The residual gases after cooling to 273 K occupy 224 mL. When the system is treated with KOH solution, the volume decreases to 64 mL. The formula of the hydrocarbon is :
Options
A.[image/equation - edit required]
B.[image/equation - edit required]
C.[image/equation - edit required]
D.[image/equation - edit required]
Solution
14.0 g of calcium metal is allowed to react with excess HCl at 1.0 atm pressure and 273 K .
Which of the following statements is incorrect?
[Given : Molar mass in of ]
(1) gas is evolved.
(2) of gas is evolved.
(3) 33.3 of is produced.
(4) The limiting reagent is calcium metal.
Sol.
mole mole 0.35 mole
Volume of evolved
(3) is wrong because weight of 38.85 gm
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