change in volume when 100 ml PH₃ decomposed to solid p &H₂gas.

1. increase in 50 ml
2. decrease in 50 ml
3. increase in 150 ml
4. decrease in 200 ml

which of the solutions wil have a lower vapour pressure and why?

1. a 5% solution of cane sugar

2. a 5% solution of urea

what is the effect of temperature and pressure of coordination number of ionic crystals?Explain in detail.

1. 1.01
2. 1.001
3. 1.1
4. 1.04

The vapour pressure of an aqueous solution of glucose is 750 mm Hg at 373 K . Calculate molality and mole fraction of solute.

K4[Fe(CN)6] is supposed to be 40% dissiciated when 1M solution prepared . its boiling point is equal to another 20% mass by volume of non-electrolytic solution A . Considering molality=molarity. The molecular weight of A is

1) 77

2) 67

3) 57

4) 47

A sample of ferrous sulfate and ferrous oxalate was dissolved in dil H2SO4. The complete oxidation of reaction mixture required 40 ml of N/15 KMnO4. after oxidation the reaction mixture was reduced by Ninc and Sulfuric acid. On again Oxidation by same KMnO4 25 ml were required. The mole ratio of

FeSO4 : FeC2O4 in sample is ??

in ideal solution of non volatile solute B and solvent Ain 2 :5 molar ratio has vapour pressure 250 mm. if a another solution in ratio 3:4 prepared then vapour pressure above this solution

1) 200 mm

2) 250 mm

3) 350 mm

4) 400 mm

when a non volatile solute is added to a solvent the vapour pressure of the liquid decrease because the number of solvent molecules on the surface decrease and as a result number of solvent molecules escaping from the surface decrease what does it mean

a solution containing 8.6 g/L of urea is isotonic with 5% solution of unknown solute . The molar mass of solute will be

1) 348.9 g/mol

2) 174.5 g/mol

3) 87.3 g/mol

4) 34.89 g/mol

1. CO
2. CO₂
3. H₂
4. O₂

The value of Henrys constant KH is _____________.

substance A tetramerises in water to a extent of 80% . A solution of 2.5g of A in 100g of water lowers the freezing point by 0.3degree C . The molar mass of A is

1) 122

2) 31

3) 244

4) 62

degree of dissociation of Ca(NO)3 in dilute aqueous solution containing 7g of solute per 100g of water at 100degree celsius is 70%. if the vapour pressure of water at 100degree celsius is 760mm of mercury, calculate the vapour pressure of the solution

20 ml of 0.2M Al₂(SO₄)₃ is mixed with 20ml of 6.6 M BaCl₂ , the concertration of Cl^- ion in solution is

1) 0.2

2) 6.6

3) 0.02

4) 0.06

what happens when saturated solution of KCl is heated..??

1000g aqueous solution of CaCO3 contain 10g of calcium carbonate concentration of the solution is :

People taking a lot of salt or salty food experience water retention in tissue cells and intercellular spaces because of osmosi.But,I think one person should lose the watwer as per osmosissolvent moves from lower concentration (cells ) to higher concentration of solution(salt water)..Then how will water will be retained,

Which of the following buffer solution turns invalid on addition of 10 ml of 1 M HCL?

(1) 100 ml having 0.15 M NH3 and NH4CL each

(2) 100 ml having 0.2 M NH3 and NH4CL each

(3) 100 ml having 0.2 M NH3 and 0.1 M NH3 and 0.1 M NH4CL each

(4) 100 ml having 0.05 M NH3 and 0.1 M NH4CL each

Decreasing order of osmotic pressure for 0.01 M aqueous solutions of

how is the vapour pressure of a solvent affected when a non volatile solute is dissolved in it ?

give reason for the following

1. tetrahedral Ni(2) complexes are paramagnetic but square planar Ni(2) complex are diamagnetic

2. only transition metals are know to form pie complexes ..

1.6 gm of metal were disolved in HNO3 to prepare its nitrate. The nitrate on strong heating gives 2 gm oxide . The eq. Wt of metal is ??

calculate the normality of a solution containing 5g NaOH in 450 ml solution.

A 5% solution (wt./mol) of cane sugar is isotonic with 0.877% (wt./vol) of urea solution . Find mol. wt. of urea if the mol. wt. of sugar is 342.

Q13)

Differentiate between molality and molarity of a solution. What is the effect of change in temperature of a solution on its molality and molarity?

Molarity of a solution is defined as the number of gram moles of solute present in l L of solution, while molality of a solution is defined as the number of gram moles of solute present in 1 kg of solvent.

Molality of a solution decreases with increase in temperature, while molality of a solution is not affected by temperature.

your answer for above question is not crrect kindly rectify.

"Molecules of ethanoic acid demerise in benzene due to hydrogen bonding .This normally happens in solvent of low dielectric constant ".Here due to demerisation particles are reduced?What this line mean .ActuallyI am unfamiliar with demerisation and dielectric constant. "

if any solute A dimerises in water at 1atm pressure and the boiling point of this solution is 100.52 degree C. if 2moles of A is added to 1kg of water and K_b for water is 0.52 degreeC/ molal, calculate the percentage association of A

1) 50%

2) 30%

3) 25%

4) 100%

what do you expect to happen when RBC placed in

1. 1%NaCl solution

2 0.9%NaCl solution

3 0.5%NaCl solution

Which statement is true for solution of0.020 MH₂SO_4...........

a) 2 litre of the solution contains 0.020 mole of SO₄^2-.
b) 2 litre of the solution contains 0.080 mole of H₃O⁺.
c) 1 litre of the solution contains 0.020 mole of H₃O⁺.
d) None of these.

Please explain in detail.........
Everyone, please share their answers for the question

two liquids having vapour pressure P1 and P2 in pure state in the ratio of 2:1 are mixed in the molar ratio of 1:2 . the ratio of their moles in vapour state would be

1) 1 :1

2) 1 :2

3) 2:1

4) 3:2

Q - 0.10M NaCl 0.05 M BaCl2 solutions are separated by a semi permeable membrane in a container . for a system , choose the correct answer

a] there is no movement of any solution across the membrane

b ] water flows from BaCl2 solution towards NaCl solution

c] water flow from NaCl solution to BaCl2 solution

d ] osmotic pressure pressure of 0.1 M NaCl is lower than the osmotic pressure of BaCl2

EXPERTSfor these type of Questions molarity is considered or normality is considered ?

Calculate the normal freezing point of a sample of sea water containing 3.8% NaCl and 0.12% MgCl2 by mass.(Cryoscopic Constant for water = 1.86K/m)

Which of the following aqueous solutions should have the highest boiling point?

Which of the following will have highest boiling point?

a. 0.1M FeCl₃ b. 0.1M Urea c. 0.1M NaCl d. 0.1 M Glucose

when CuSO4 is added to a solution of ammonia

1) freezing point is lowerd

2) freeing point is raised

3) boiling point is raised

4) both 1 and 3

1. A solution containing 15g urea per litre of solution in water has ther same osmotic pressure(isotonic) as a solution of glucose in water. calculate the mass of glucose present in 1 litre of the solution.

what weight of non volatile solute urea ,needs to be dissolved in 100gms of water in order to decrease the vapour pressure of water by 25% ?

normality of 2M sulphuric acid is....... explain

a) 2N

b) 4N

c) N/2

d) N/4

The ratio of the value of any colligative property for KCl solution to that for sugar is nearly ........... times.

1. 1
2. 0.5
3. 2
4. 2.5

The vapour pressure of pure water at 26^oC is 25.21 torr. What is the vapour pressure of a solution which contain 20g glucose , C₆H₁₂O₆ , in 70g water?

the osmotic pressure of decimolar solution of urea at 27degree C

1) 2.49 bar

2) 5bar

3) 3.4 bar

4) 1.25 bar

for associative solutes

1) iα)

2) i1 andalpha (α) 1

3) ialpha (α)1

4) i1 andalpha (α)

name the solute and solvent in the following solutions:

a)syrup

b)haze9dust in air)

c)butter(water in fat)

the osmotic pressure of a 0.25M urea solution is 2.67 atm. what will be the osmotic pressure of a 0.25M SOLUTION OF POTTASIUM SULPHATE?