6771. For a neutral solution (pH = 7), the value of[H⁺] [OH⁻] is equal to
0
1
< 1
> 1
✅ The correct answer is option B.
Chemical Engineering
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6772. Claussius Clapeyron equation applies to the __________ process.
Sublimation
Melting
Vaporisation
All of the above
✅ The correct answer is option D.
6773. Which of the following expressions defines the Baume gravity scale for liquids lighter than water?
°Be = (140/G) – 130
°Be = 200(G-1)
°Be = 145 – (145/G)
°Be = (400/G) – 400
✅ The correct answer is option A.
6774. 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H₂ produced will be __________ gm. gm.
0.5
1
3
5
✅ The correct answer is option A.
6775. Colligative properties of a dilute solution are those which depend entirely upon the
Constitution of the solute
Chemical composition of the solute
Number of solute molecules contained in a given volume of the solvent
None of these
✅ The correct answer is option A.
6776. Weight of 56 litres of ammonia at N.T.P. is __________ gm.
2.5
42.5
56
2800
✅ The correct answer is option B.
6777. One ‘Therm’ is equivalent to
10⁵ BTU
10⁵ kcal
10⁹ BTU
10⁹ kcal
✅ The correct answer is option A.
6778. A gaseous mixture contains 14 kg of N₂, 16 kg of O₂ and 17 kg of NH₃. The mole fraction of oxygen is
0.16
0.33
0.66
0.47
✅ The correct answer is option B.
6779. The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
Lower than
Higher than
Same as
Not related to
✅ The correct answer is option A.
6780. At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be
Significantly less than 4.69 atm
Nearly equal to 4.69 atm
Significantly more than 4.69 atm
Indeterminate due to lack of data
✅ The correct answer is option C.