241. Number of gram equivalent of solute dissolved in one litre of solution is called its
Normally
Molarity
Molality
Formality
✅ The correct answer is option A.
Statiometery MCQs
242. Pick out the wrong unit conversion.
L kgf= 9.8 Newton
1 stoke = 1 m²/second
1 Pascal second = 10 poise
1 ppm = 1 ml/m³ = 1 mg/kg
✅ The correct answer is option B.
243. Enthalpy of a vapor gas mixture may be increased by increasing the
Temperature at constant humidity
Humidity at constant temperature
Temperature and the humidity
All of the above
✅ The correct answer is option D.
244. The depression in freezing point of a solution is
Inversely proportional to the mass of solvent
Directly proportional to the mole of solute
Both A & B
Neither A nor B
✅ The correct answer is option C.
245. Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).
°API = 200(G – 1)
°API = (141.5/G) – 131.5
°API = (140/G) – 130
°API = 145 – (145/G)
✅ The correct answer is option B.
246. Applicability of Claussius-Clapeyron equation is subject to the condition that the
Vapor follows ideal gas law
Volume in the liquid state is negligible
Both A & B
Neither A nor B
✅ The correct answer is option C.
247. Which of the following gravity scales is used exclusively for liquids heavier than water?
Baumme scale
Twaddel scale
API scale
None of these
✅ The correct answer is option B.
248. The unit of dynamic viscosity is
Stoke
Poise
Gm/cm sec
Both B & C
✅ The correct answer is option D.
249. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = – 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to
1225
1335
1525
1735
✅ The correct answer is option D.
250. Atmospheric pressure corresponds to a hydrostatic head of
13.6 cms of Hg
34 ft ofH₂O
1 metre of H₂O
13.6 metres of Hg
✅ The correct answer is option B.