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STOICHIOMETRY

Stoichiometry
One 'Therm' is equivalent to

10⁵ BTU
10⁹ BTU
10⁹ kcal
10⁵ kcal

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Stoichiometry
Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

None of these
Yield enhancement
Heat conservation
Product enrichment

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Stoichiometry
Isotopes are atoms having the same

Number of neutrons
Mass number
Atomic mass
None of these

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Stoichiometry
One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

1525
1735
1225
1335

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Stoichiometry
Pick out the wrong unit conversion.

1 atm. = 760 mm Hg = 29.92 inch Hg = 14.7 psi = 1.013 bar = 1.013 kgf/cm²
None of these
1 kPa = 100 bar
1 mm Hg = 1 torr = 133.3 Pa

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