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Stoichiometry

Stoichiometry
Cv for monoatomic gases is equal to(where, R = gas constant)

1.5 R
2R
R
3R

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Stoichiometry
A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.

283
566
141.5
293

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Stoichiometry
A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis

1.2
1.35
1.3
1.25

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Stoichiometry
With increase in the temperature of pure (distilled) water, its

PH decreases and pOH increases
POH and pH both 4ecreases
POH decreases and pH increases
PH and pOH both increases

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Stoichiometry
The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

CS₂ > C₂H₅OH > H₂O
H₂O > C₂H₅OH > CS₂
H₂O > CS₂ > C₂H₅OH
CS₂ > H₂O > C₂H₅OH

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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

1335
1525
1735
1225

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