6901. An aqueous solution of 2.45% by weight H₂SO₄ has a specific gravity of 1.011. The composition expressed in normality is
0.25
0.2528
0.5
0.5055
✅ The correct answer is option D.
Chemical Engineering
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6902. Pick out the wrong unit conversion of heat transfer rate.
1 kcal/hr= 1.163 Watt
1 Watt = 1.163 kcal/hr
1 BTU/ft².hr = 2.712 kcal/m².hr
1 kcal/m².hr = 0.3687 BTU/ft².hr = 1.163 Watt/m²
✅ The correct answer is option B.
6903. The heat capacity of a substance is
Greater for liquid state than for solid state
Lower for liquid state than for gaseous state
Higher for solid state than for liquid state
Equal for solid and liquid states below melting point
✅ The correct answer is option A.
6905. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The latent heat of condensation (kJ/kg⁻¹ ) under these conditions is
40732
2676
2263
540
✅ The correct answer is option C.
6906. Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0-5m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are
M/s
Cm/s
Mole/m².s.Pa
Kmole/m².s.Pa
✅ The correct answer is option C.
6908. Which of the following ideal gas laws are not applicable to mixture of gases ?
Amgat’s law
Dalton’s law
Boyle’s law & Charle’s Law
None of these
✅ The correct answer is option C.
6909. With rise in temperature, the heat capacity of a substance
Increases
Decreases
Remains unchanged
Either A or B; depends on the substance
✅ The correct answer is option A.