Chemical Engineering MCQs

6108 MCQs  (Page 542 of 611)

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At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?
A. 6
B. 8
C. 10
D. 12
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The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is_____________________?
A. Termed as relative saturation
B. Not a function of the composition of gas mixture
C. Called percentage saturation
D. Not a function of the nature of vapor
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For most salts, the solubility increases with rise in temperature, but the solubility of _______________ is nearly independent of temperature rise?
A. Sodium chloride
B. Sodium carbonate monohydrate
C. Anhydrous sodium sulphate
D. Hypo
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The chemical nature of an element is independent of_______________________?
A. Its atomic number
B. The number of protons or electrons present in it
C. The number of neutrons present in it
D. None of these
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In general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute?
A. Increase
B. Decrease
C. Remain unchanged
D. None of these
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The equilibrium data of component A in the two phases B and C are given below. The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is ____________________?
A. 15.5
B. 16
C. 16.5
D. 17
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S.T.P. corresponds to _________________?
A. 1 atm. absolute pressure & 15.5°c
B. 760 mm hg gauge pressure & 15.5°c
C. 760 torr & 0°c
D. 101.325 kpa gauge pressure & 15.5°c
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Average molecular weight of air is about ____________________?
A. 21
B. 29
C. 23
D. 79
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If pH value of a solution is 8, then its pOH value will be ____________________?
A. 6
B. 1
C. 7
D. 10
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What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C ?
A. 2/3
B. 1/3
C. 1/2
D. 1/3 × (298/273)
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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