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Syllabus

Q. Define-

i) Molal elevation constant.

ii) Molal Depression constant.63.Dry air is slowly passed through three solutions of different concentrations, c_{1}, c_{2}and c_{3}: each containing (non volatile) NaCl as solute and water as solvent, as shown in the Fig. If the vessel 2 gain weight and vessel 3 loses weight, then : (1) c_{1}> c_{2}(2) c_{1}< c_{2}_{ }(3) c_{1}< c_{3}(4) c_{2}> c_{3}what are the applications of Henry's law?4% solution of a non volatile solute is isotonic with 0.702% urea solution. If molar mass of urea is 60.What is the molar mass of the non volatile solute.

which is more concentrated 1 molar or 1 molal?

Why is it not possible to obtain pure ethanol by fractional distillation? What

general name is given to binary mixtures which show deviation from Raoultslaw and whose components cannot be separated by fractional distillation.How many types of such mixtures are there?What is a decimolar solution?

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 produce a warm solution. Which type of deviation from Raoult's law does it show?

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

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 ?

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

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.

a) 30

b) 60

c) 180

d) 120

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

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.

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.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.

Q- What is meant by semimolar and decimolar solutions?

1)MOLe Fraction of NaOH

2)Molality of NaOH

3)Molarity of NaOH

Density of NaOH solution is 1.038g/cm3

0.2g sample of H2O2 required 10 ml of N KMnO4 in a tritation in the prisence of H2SO4 . Find the purity of H2O2 .

ans = 85%

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

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?what is the n-factor for phosphoric acid?

why a person suffering from high blood pressure is advised to take minimum quantity of common salt?

What are the limitations of Henry's law?

An aqueous solution of sodium chloride freezes below 273K. Explain the lowering in freezing points of water with the help of a suitable diagram.

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

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

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

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

_{A}is mole fraction of A in mixture hence p^{0}_{A}and p^{0}_{B}are (in torr)a. 254,119

b. 119,254

c.135,254

d.154,119

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)?

(A) NH

_{3}(B) PH_{3}(C) AsH_{3}(D) SbH_{3}.75. Which of the following is least basic?

(A) NF

_{3}(B) NH_{3}(C) NCl_{3}(D) NI_{3}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

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?What is the molecular mass of cane sugar?

14. Dry air is slowly passed through three solutions of different concentrations, ${c}_{1},{c}_{2}and{c}_{3}$ ; each containing (non volatile) NaCl as solute and water as solvent, as shown in the Fig. If the vessel 2 gains weight and the vessel 3 loses weight, then

$\left(A\right){c}_{2}{c}_{3}\left(B\right){c}_{1}{c}_{2}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\left(C\right){c}_{1}{c}_{3}\left(D\right)Both\left(A\right)and\left(B\right)$

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 }.10.6 g of a substance of molecular weight 106 was dissolved in 100 ml. 10 ml of this solution was pipetted out into a 1000 ml flask and made up to the mark with distilled water. The molarity of the resulting solution is

1) 1 M 2) 10

^{-2}M3) 10

^{-3}4) 10^{-4}MHenry 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??

a. 7.31.

b. 29.25

c. 5.85

d. 19.5

I want answer with solution as soon as possible

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

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?

What happens when blood cells are placed in pure water?

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?a) equal to that of water

b) equal to that of methanol

c) more than that of water

d) less than that of water

pls explain...

For determining the molecular mass of polymers, osmotic pressure is preferred to other Colligative properties. Why????????

(1) Increases

(2) First increases then decreases

(3) Decreases

(4) First decreases then increases

^{–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.}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

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

_{3 }is required to prepare 400 ml solution of 0.2 M HNO_{3?}why is freezing point depression of 0.1 M NaCl solution nearly twice that of 0.1 M glucose solution?

a) The nature of the solute

b) The nature of the solvent

c) The number of particles of solute

d) The molecular mass of solute

How to calculate equivalent weight?

^{3}of an aqueous solution of a protein contains 1.26 gm of a protein. The osmotic pressure of such a solution at 300K is found to be 2.57 * 10^{-3}bar. Calculate the molar mass of the protein.(iv) 1.0 M KNO3

11.1g of CaCl2 is present in 100ml of aqueous solution . the chloride ion concentration is

1. 1m 2. 2M 3. 0.5M 4. 0.2M

In a Homogeneous mixture the diameter of molecular particle is _____ meter.A-:10^{-9}mB-:10^{-8}mC-:10^{-9}cmD-:10^{-8}cmplz explain the answer.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 ?

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

What would be the value of Van't Hoff factor for a dilute solution of K

_{2}SO_{4}?Why is vapour pressure of solution of glucose in water lower than water?

URGENT:

1) 10ml of conc.H2SO4(18molar) is diluted to 1l . the aprrosimate strength of dilute acid could be?

2) The normality of orthophosphoric acid having a purity 70% by weight and specific gravity 1.54 would be?

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 298k39._{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 solution