Chemical Engineering - Stoichiometry

1. 

One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The amount of water vapour condensed (in kg) is

A. 0.0
B. 0.065
C. 0.1
D. 1.0

Answer: Option B

Explanation:

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2. 

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 ) ?

A. ΔH = 1 (+ ve)and Δ V = -ve
B. ΔH = 0
C. ΔV = 0
D. both (b) and (c)

Answer: Option D

Explanation:

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3. 

Which equation is not an equation of state ?

A. PV = RT + B/V + y/V2 + ....
B. (P + a/V2)(V-b) = RT
C.
D.

Answer: Option C

Explanation:

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4. 

Number of gm moles of solute dissolved in 1 kg of solvent is called its

A. normality
B. molarity
C. molality
D. formality

Answer: Option C

Explanation:

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5. 

Size range of the colloidals particles is

A. 5 - 200 milli-microns
B. 50 - 200 microns
C. 500 - 1000 microns
D. 10 - 50 Angstrom

Answer: Option A

Explanation:

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