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

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

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

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

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

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

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

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

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

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

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.

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

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%

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.

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

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

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

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

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

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

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

name the solute and solvent in the following solutions:

a)syrup

b)haze9dust in air)

c)butter(water in fat)

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