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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

1 Hard

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Application +4 | -1

At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20%

{O_2}

by volume for complete combustion. After combustion, the gases occupy 330 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is

View answer and explanation

Correct option: A

{C_2}{H_{12}}\,

The correct answer is A (

{C_2}{H_{12}}\,

) because the hydrocarbon formula is determined by using stoichiometry of the combustion reaction and given volume data.

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If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely into ammonia, the ratio of initial and final volumes under the same temperature and pressure would be: How many g are present in one mole of Ag? 8 g of NaOH is dissolved in 18 g of

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\mathrm{Cu}(\mathrm{II})

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