Q.1
Solutions which distil without change in composition are called
Q.2
A saturated vapor on being compressed would
Q.3
A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis
Q.4
Recycling in a chemical process facilitates
Q.5
The unit of Cp in S.I. units is
Q.6
The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75ρ at a temperature of __________ °K
Q.7
An oxidation process is accompanied by decrease in the
Q.8
In the reaction, Ca + 2H₂O = Ca(OH)₂ + H₂ ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water?
(atomic weight of calcium = 40)
Q.9
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
Q.10
Vapor pressure of water at 100°C is about __________ bar.
Q.11
1 centipoise is equivalent to
Q.12
1 kg/cm² is equal to
Q.13
The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is
Q.14
One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as
Q.15
Pick out the wrong statement.
Q.16
Cp is expressed in S.I. unit as
Q.17
With rise in temperature, the solubility of ammonia in water at a fixed pressure
Q.18
A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of
Q.19
Two solutions A₁ and A₂ have pH value of 2 and 6 respectively. It implies that the solution
Q.20
1 torr is equal to __________ mm Hg column.
Q.21
Viscosity of 1 centipoise is equal to 1 centis-toke in case of
Q.22
1m³ is approximately equal to
Q.23
80 kg of Na₂SO₄ (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na₂SO₄ .10H₂O crystals separate out. The weight fraction of Na₂SO₄ in the remaining solution is
Q.24
1 kgf/cm² is not equal to
Q.25
1 torr is equivalent to
Q.26
The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________
Q.27
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
Q.28
Size range of the colloidals particles is
Q.29
In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.
Q.30
CaCO₃ contains __________ percent of Ca by weight.
Q.31
Percentage saturation of a vapor bearing gas is always __________ the relative saturation.
Q.32
A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.
Q.33
The heat of vaporisation __________ with increase in pressure.
Q.34
Pick out the wrong statement.
Q.35
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because
Q.36
Na₂SO₄. 10H₂O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na₂SO₄. The final concentration of the solute in the solution is 10%. The weight of crystals is
Q.37
pH value of H₂SO₄ (5% concentration) is
Q.38
Pick out the wrong unit conversion of heat transfer co-efficient.
Q.39
Which of the following is an exothermic reaction?
Q.40
Which of the following is not a unit of pressure?
Q.41
The most convenient way of expressing solution concentration is in terms of
Q.42
For a given mass of a gas at constant temperature, if the volume 'V' becomes three times, then the pressure 'P' will become
Q.43
1 ata is equivalent to
Q.44
The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.
Q.45
Which of the following is followed by an ideal solution ?
Q.46
Cp equals Cv at
Q.47
Cp/Cv for monoatomic gases is
Q.48
Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.
Q.49
The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.
Q.50
Pick out the wrong unit conversion of mass transfer co-efficient.
0 h : 0 m : 1 s