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Syllabus

Q. Define-

i) Molal elevation constant.

ii) Molal Depression constant.what are the applications of Henry's law?R-COOH dimerises in benzene upto 50% and it ionises upto 10% in water.Detrmine the ratio of Van't hoff factors in dimerisation v/s ionisation?

which is more concentrated 1 molar or 1 molal?

39._{2}SO_{4}contains(1) 49 g of H

_{2}SO_{4}per 250 g of solution(2) 98 g of H

_{2}SO_{4}per 250 g of solvent(3) 49 g of H

_{2}SO_{4}per 250 g of solvent(4) 98 g of H

_{2}SO_{4}per 250 g of solutionWhat is a decimolar solution?

(Kf water = 1.86 K/m)

1) 300g

2) 200g

3) 178g

4) 258g

A decimolar solution of potassium ferricyanide (K

_{4}[Fe(CN)_{6}]) is 50% dissociated at 300k. calculate the osmotic pressure of solution.Two liquids A and B on mixing form ideal solution. their vapour pressures in pure state are 200 and 100 mm respectively. what will be the mole frction of B in the vapour phase in equillibrium with an equimolar solution of two?

The answer is 0.33..!!! how to get it??Resistance of a conductivity cell filled with 0.1 M is 100 ohm. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohms, calculate the conductivity and molar conductivity of the 0.02 M KCl solution. Conductivity of 0.1 M KCl solution is 1.29*10

^{-2}S cm^{-1.}Two liquids A and B on mixing produce a warm solution. Which type of deviation from Raoult's law does it show?

what are the differences btw ideal and non ideal solns?

the concentration of NO3 ions when equal volumes of 0.1 M AgNO3 and 0.1 M Nacl are mixed together is ?

38. A degree of dissociation of Al

_{2}(SO_{4})_{3}is 25% in a sclvent, then(1) Normal boiling point = experimental boiling point

(2) Normal osmotic pressure = 2 x experimental osmotic pressure

(3) NormaI molecular weight = 2 x experimental molecular weight

(4) Normal freezing point = $\frac{1}{4}$ x experimental freezing point

what is the mole fraction of the solute in 2.5 m aqueous solution ??

What is the maximum value of vant Hoff factor for Na

_{2}SO_{4}.10H_{2}O?vapour pressure of chloroform and dichloromethane at 298 k are 200mm of hg and 415mm of hg respectively.

1)calculate the vapour pressure of solution prepared by mixing 25.5 g of chloroform and 40g of dichloromethane at 298K.

2)mole fraction of each component in vapour phase.

(i)0.5% NaCl solution (ii) 1% NaCl solution ? Explain.

why aquatic species are more comfortable in cold water than warm water?

A mixture of chlorobenzene and bromobenzene forms nearly ideal solution but a mixture of chloroform and acetone does not. Why?

If N2 gas is bubbled through water at 293 K, how many millimoles of N2 gas would dissolve in 1 litre of water. Assume that N2 exerts a partial pressure of 0.987 bar. Given that Henrys law constant for N2 at 293 K is 76.48 kbar.

1) M/Kb

2) (4Kb A)/M

3) (Kb A)/M

4) KbM/4A

1. NaCl or CaCl

_{2}is used to clear snow from roads. why2. what is an antifreeze?

3. what is de icing agent?

4. what is vant hoff factor for a factor which undergoes tetramerisation in an organic compound.

Addition of HgI2 to KI (aq.) shows decrease in vapour pressure. Why?

Q- What is meant by semimolar and decimolar solutions?

An aqueous solution of NaCl freezes below 273K. Explain the lowering in freezing point of water with the help of suitable diagram..

What is the significance of Henry's Law constant KH?

The vapour pressure of pure ether (molar mass 74 g/mol) at 293k is 588 m bar. A 10% (w/w) solutions of benzoic acid (molar mass=122 g/mol) was prepared in ether at 1293k. What will be the vapour pressure of solutions?

A solution of glucose in water is labelled as 10% w/w, what would be the molality and mole fraction of each component in the solution? If the density of solution is 1.2 g mL

^{−1}, then what shall be the molarity of the solution?I)ΔH

_{mix}< 0II)ΔS

_{mix}< 0III)ΔG

_{mix}< 0IV)ΔV

_{mix}< 0why a person suffering from high blood pressure is advised to take minimum quantity of common salt?

What are the limitations of Henry's law?

7. Raoult's law is not valid in.

(1) Non- ideal solution showing positive deviation.

(2) Non-ideal solution showing negative deviation.

(3) Mixture of two immiscible liquid.

(4) all of these

What is the Van't Hoff Factor in K_{4}[Fe(CN)_{6}] and BaCl_{2}? AND How it is calculated here ?^{0}C . Calculate the molar mass of protein .equivalent mass of H3PO4 for the given reaction

H3PO4 +Ca(OH)2 --> CaHPO4 + 2H2O

a. 7.31.

b. 29.25

c. 5.85

d. 19.5

I want answer with solution as soon as possible

Calculate the osmotic pressure of a solution obtained by mixing 100cm

^{3}of 1.5% solution of urea (molar mass =60) and 100cm^{3 }of 3.42 % solution of cane sugar (molar mass=342) at 20^{o}C (R=0.082litre atm/degree/mol).^{3 N /C EXISTS I in the region}the density of a solution prepared by dissolving 120g of urea in 1000g of water is 1.15g/ml .The molarity of soltuion is:

1.78M

1.02 M

2.05 M

0.5 M

what is the n-factor for phosphoric acid?

what is expected value of van,t Hoff factor for K3 [Fe(CN)6] in dilute solutions?

calculate the amount of KCL which must be added to 1Kg of water so that the freezing point is depressed by 2K.(Kf for water =1.86 K Kg/mol)?

Two liquids A and B boil at 145 C and 190 C respectively.Which of them has higher vapour pressure at 80 C.Give reason..-

Pre board question

Plz help.What will be the answer

Q. A solution containing 0.1 mole of urea in 1 L of glacial acetic acid, when cooled the first crystal which appears at the freezing point contain the molecules of

(1) Urea

(2) Acetic acid

(3) Both urea and acetic acid

(4) Either of these depending upon experimental conditions

Thevapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g whenaddedto 39.0 g of benzene (molar mass 78 g mol -1). Vapour pressureofthe solution, then, is 0.845 bar. What is the molar mass of thesolidsubstance?Liquid Y has higher vapour pressure than liquid X, which of them willhave higher boiling point?

1)MOLe Fraction of NaOH

2)Molality of NaOH

3)Molarity of NaOH

Density of NaOH solution is 1.038g/cm3

Q.(i) 5.0 g of substance with molecular weight 200 is dissolved in 50 g of a solvent with molecular weight 60 and vapour pressure 40 cm Hg at 27$\xb0$C. Calculate vapour pressure of the solution at this temperature.

a 2g of benzoic acid dissolve in 25g of benzene shows a depression in freezing point of 1.62 k.

molal depression constant for benzene is 4.9 KKg/mol. what is the % of association of acid.

if it forms a dimer in sol

^{n }.Henry Law Constant For CO

_{2}In Water Is 1.67x10^{8}Pa At 298 K.Calculate The Quantity Of CO_{2 }In 500 ml Of Soda Water When Packed Under 2.5 atm CO_{2 }Pressure At 298 K ?what is Formality and normality??

find boiling point of solution containing 0.52g of glucose dissolved in 80.2 g of water. kb=0.52 Kkg/m.is the answer=373.132???

Calculate the molality of 1M solution of sodium nitrate. The Density of the solution is 1.25g/ml.

the mole fraction of water in a sulphuric acid solution is 085.calculate the molality of the solution

what are the values of delta V mix for solutions showing positive and negative deviations from raoult's law?

if 0.5 mol of BaCl2 is mixed with 0.2 mol of Na3PO4.How many maximum moles of Ba3(PO4)2 can be formed?

The partial pressure of ethane over a solution containing 6.56 Ã— 10

^{âˆ’3}g of ethane is 1 bar. If the solution contains 5.00 Ã— 10^{âˆ’2}g of ethane, then what shall be the partial pressure of the gas?For determining the molecular mass of polymers, osmotic pressure is preferred to other Colligative properties. Why????????

Calculate the boiling point of a solution prepared by adding 15 g of NaCl to 250 g of water(K

_{b}for water + 0.512 K kg mol-1, Molar mass mas of NaCl = 58.44 g)^{3 }. The vapour pressure of pure water at 295k is 20 mm .^{–1}) in 100 g of CS_{2}(vapour pressure = 854 torr) is 848.9 torr. The molecular formula of the solute is:-(1) X

(2) X

_{2}(3) X

_{4}(4) X

_{8 Kindly answer sir/mam.}0.7g of a sample of Na2CO3.xH2O were dissoled in water and the volume made up to 100ml . 20ml of this solution

required 19.8ml of 0.1 N HCl for complete neutralization . Find the value of x .

ans = ~2

why is freezing point depression of 0.1 M NaCl solution nearly twice that of 0.1 M glucose solution?

Please its urgent!!!!!!

A solution containing 36g of solute dissolved in one litre of water gave an osmotic pressure of 6.75 atmosphere at 27?C . The molal elevation const of water is 0.52?C .Calculate the boiling point of the solution.

How to calculate equivalent weight?

2Give reasons for the following : (a) RBC swell up and finally burst when placed in 0.1% NaCl solution.

(b) When fruits and vegetables that have been dried are placed in water, they slowly swell and return to original form.

(iv) 1.0 M KNO3

In 10 L water 1 mole of Ca(OH)

_{2}is added with 1 mole of H_{2}SO_{4}.Determine van't hoff factor of final solution?FeCl

_{3}on reaction with potassium ferrocyanide in aqueous solution gives blue colour.When 0.01M of FeCl_{3}and 0.1M potassium ferrocyanide are placed in a beaker and seperated by a semi permeable membrane, identify whether there will be an appearance of blue colour on potassium ferrocyanide side due to osmosis.E xplain your answer.What is the molecular mass of cane sugar?

sodium chloride solution freezes at lower temperature than water but boils at higher temperature than water , explain.

What is the van't Hoff factor for a compound which undergoes tetramerization in an organic solvent ?

why is cooking temperature in pressure cooker is higher than that of open pan???

An x molal solution of a compound in benzene has a molefraction =0.2.what is the value of x?

how can we calculate vant hoff factor of an polymer plzzzzz explain

Why is vapour pressure of solution of glucose in water lower than water?

what is anoxia?

A solution containing 30g of non-volatile solute exactly in 90g of water has a vapour pressure of 2.8 kpa at 298 k. further, 18g of water is then added to the solution & the new vapour pressure becomes 2.9 kpa at 298 k. Calculate.a. Molar mass of the solute b. Vapour pressure of water at 298khow is

m= w2/m2 // w1/1000

?

how did it come?