Stoichiometry
Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing ) ?

ΔH = 0
ΔH = 1 (+ ve)and Δ V = -ve
Both B and C
ΔV = 0

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Stoichiometry
Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

Volume in the liquid state is negligible compared with that in the vapor state
All of these
Molal latent heat of vaporisation is constant within the limited temperature range
Vapor follows the ideal gas law

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Stoichiometry
Pick out the wrong statement about the recycle stream in a process.

The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio
Recycling in a process does not help in getting higher extent of reaction
Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column
Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants

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