B:-25%
೦30%
5:496
Correct ۸۳۰۸۷۴ ೦೧0078.
Question23:-A solution of NaOH is prepared by dissolving 40 ‏و‎ NaOH in 90 ‏و‎ water. The composition of NaOH in the solution as mole fraction and mass fraction are approximately
0.2 and 0.44
B:-0.2 and 0.69
6.0.167 and 0.44
0.167 and 0.31

Correct Answer: Option-D

Question24:-Pure carbon is completely bumt in oxygen. The flue gas analysis shows 70% C0. , 20% CO and 20960, . The percent excess oxygen used is

Correct Answer:- ೦೧000
Question25:-A sample of gas at 27°C and 2 atm occupies a volume of SL. The volume occupied by the same gas sample at 47°C is
५०.२५
8:29
‏ا3ین‎
‎0:87
‎Correct Answer: Option-C
Question26:-Choose the incorrect statement.
‘Ache partial pressure of a gas in a mixture of gases is the product of total pressure and its mole fraction.
B:-According to Dalton’s law, the total pressure exerted by a gas mixture is the sum of partial pressures of individual components of the gas mixture,
C=Dalton’s law of partial pressures assumes that the individual component gases obey ideal gas law.
D:-Dalton’s law of partial pressures is applicable to a gas mixture whose individual components obey van der Waals equation.
Correct Answer:- Option-D
Question27:-A sample of gas mixture has 20% 0, and 80% N, on volume basis. The weight percentage 0, of in the gas mixture is
കാ
മമമ
248
D:28.4
Correct Answer: Option ®
Question28::Which of the following is a byproduct of petroleum refining 7
‘Ac Fuel oil
B:-Lubricating oil
ceSulfur
D:Copper
Correct Answer: Option-C
Question29::Which of the following has maximum hydrogen to carbon ratio (by weight) ?
AGasoline
Bs-Naphtha
C-Diesel oil
‏امھ‎ oil
Correct Answer:- ೦೧000
Question30::Which of the following has higher heat of combustion 7
‘AcAromatics

B:-Olefins