221. One of the specific gravity scales is “Brix” (used speicifically for sugar solution). It is defined as
Brix = (400/G) – 400
Brix = 200 (G-1)
Brix = 145 – (145/G)
None of these
✅ The correct answer is option A.
Statiometery MCQs
222. N.T.P. corresponds to
1 atm.absolute pressure& 0°C
760 mm Hg gauge pressure & 0°C
760 torr & 15°C
101.325 KPa gauge pressure & 0°C
✅ The correct answer is option A.
223. The quantity of heat required to evaporate 1 kg of a saturated liquid is called
Specific heat
1 Kcal
Sensible heat
Latent heat
✅ The correct answer is option D.
224. 1m³ is approximately equal to
28 litres
35 ft³
4.5 litres
4.5 ft³
✅ The correct answer is option B.
225. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is
Independent of the temperature
Increased with the increase in pressure
Decreased with the increase in pressure
Unchanged by the pressure change
✅ The correct answer is option C.
226. Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the
Vapor follows the ideal gas law
Molal latent heat of vaporisation is constant within the limited temperature range
Volume in the liquid state is negligible compared with that in the vapor state
All of the above
✅ The correct answer is option D.
227. For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.
Dry bulb temperature
Wet bulb temperature
Humidity
Relative saturation
✅ The correct answer is option B.
228. Kopp’s rule is concerned with the calculation of
Thermal conductivity
Heat capacity
Viscosity
Surface tension
✅ The correct answer is option B.
229. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
Use of equation of state
Fugacity co-efficient
Activity co-efficient
None of these
✅ The correct answer is option C.
230. Saturated molal absolute humidity of the vapor-gas mixture depends upon the
Vapor pressure at dry bulb temperature
Total pressure
Both A & B
Neither A nor B
✅ The correct answer is option C.