Liquids in Liquids
Trending Questions
Q. H2S, a toxic gas with a rotten egg-like smell, is used for the qualitative analysis. If the solubility of H2S in the water at STP is 0.195 m, then Henry's law constant (in atm) is :
- 2890.4
- 28.94
- 285
- 145.2
Q. At what temperature Celsius and Fahrenheit are equal?
- −25∘C
- −30∘C
- −40∘C
- −35∘C
Q. 4. Which among the following is strongest lewis base: NH_2^- F^- CH_3^- OH^-
Q. 34. 2X(g) gives 3Y(g)+2Z(g) a)Time(in min). |0. |100. |200 | b)Partial pressure |800| 400. | 200| of X(in mm of Hg). Assuming ideal gas conditions calculate a)Total pressure when px=700mm.
Q. Choose the correct relation for boiling point elevation constant (Kb)
where :
Tb is boiling point of pure solvent
M is molar mass of the solvent
Lvap is the molar enthalpy of vapourisation per gram of the solvent
R is ideal gas constant
(All quantities to be taken in SI units)
where :
Tb is boiling point of pure solvent
M is molar mass of the solvent
Lvap is the molar enthalpy of vapourisation per gram of the solvent
R is ideal gas constant
(All quantities to be taken in SI units)
- Kb=R×Tb1000×Lvap
- Kb=R2×Tb×M1000×Lvap
- Kb=R×T2b1000×Lvap
- Kb=Lvap×M1000×R×T2b
Q. 2. A certain quantity of gas occupied 100ml when collected over water at 15degree C and 750mm pressure. It occupies 91.9ml in dry state at NTP. Find the vapour pressure of water at 15degree C
Q. During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C_{p/_{}}C_{v }is: a)3/2 b)2 c)4/3 d)5/
Q. A vessel contains 28 gm of N2 and 32 gm of O2, at temperature T=1800 K and pressure 2 atm. Find the pressure if N2 dissociate 30 % and O2 dissociate 50% if temperature remains constant
(1) 2 atm
(2) 1 atm
(3) 2.8 atm
(4) 1.4 atm
Q. Magnitude of hydrogen bonding is maximum and minimum respectively in
- Solid phase and liquid phase
- Liquid phase and solid phase
- Solid phase and gaseous phase
- Liquid phase and gaseous phase
Q. If N2 gas is bubbled through water at 293K, Calculate solubility of N2 gas ? Assume that N2 exerts a partial pressure of 0.987bar. Given that Henry's law constant for N2 at 293K is 76.48k barmole/litre
- 2.9×10−5molelitre
- 2.9×10−3molelitre
- 1.29×10−4molelitre
- 1.29×10−5molelitre
Q. 34.05 ml of phosphorus vapour weighs 0.0625 g at546 degree C and 0.1 bar pressure. What is the molar mass of phosphorus?
Q. At temperature T K, PC15 is 50% dissociated at an equilibrium pressure of 4 atm. At what pressure it would dissociate to the extent of 80% at the same temperature? (1) 0.05 atm (2) 0.60 atm (4) 2.50 atm ) 0.75 atm
Q. The volume occupied by 0.402g of n2o4 under a pressure of 753mm and 65°C is 241 ml .calculate the apparent molecular weight and degree of dissociation of n2o4
Q.
Which of the following compounds requires maximum heat to vaporize?
Hydrochloric acid
Water
Acetone
Nitrogen
Q. Calculate molecular weight of the compound if 0.168 g of it displaces 49.4ml of air measured over water at 20°C and 740mm of pressure (aqueous tension at 20°=18mm)
Q.
The organic liquids which are steam volatile and immiscible with water can be separated by
distillation
fractional distillation
steam distillation
evaporation
Q. Gibbs energy change is 63.3 kj for reaction-
Ag2O3-------->2Ag+ +CO3^2- (in equilibrium)
For it, Ksp in water is equal to-
Ag2O3-------->2Ag+ +CO3^2- (in equilibrium)
For it, Ksp in water is equal to-
Q. pA and pB are the vapour pressures of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure (P) of the solution will be:
- pA+xA(pB−pA)
- pA+xA(pB−pA)
- pB+xA(pA−pB)
- pB+xA(pB−pA)
Q. A mixture of N2 and CO2 at one atm pressure contains 56% by weight of N2. Partial pressure of N2 in the mixture will be:
a)0.56 atm b)0.44 atm c)0.677 atm d)0.33 atm
Q.
compare the vapour pressure of petrol and kerosene.
Q. 18 g glucose (C6H12O6) is added to 178.2 g water. The vapour pressure of water (in torr) for this aqueous
solution is:
solution is:
- 76
- 752.4
- 759
- 7.6
Q. what is the difference between liquid and aqueous and why in the formula of constant equlibrium aqueous reactants and products are considered but liquids are ignored.
Q. Q 26 There are two closed containers. A contain PCl5 at 25 degree celcius at 1 bar pressure. And Container B contains equilibrium mixture of gas obtained by partial decomposition of PCl5 at same temprature and pressure. Assuming that initially equal moles of PCl5 were taken into container the gases starts to effuse through a pinhole in the container. Which shows higher rate of effusion?Justify
Q. Let a mixture be prepared by mixing nA moles of liquid A and nB moles of liquid B. Let PA and PB be the partial pressures of the two constituents and P∘A and P∘B be the vapour pressures in their pure state respectively. PT is the total pressure. Which of the following relations are true?
- PT=PA+PB
- PT=P∘A+P∘B
- PT=P∘A.ηAηA+ηB+P∘B.ηBηA+ηB
- None of these