Osmotic Pressure

Q.

Molarity of NaOH in a solution prepared by dissolving 4 g of NaOH in enough water to form 250 ml of solution is:

1. 0.4 M

2. 4.1 M

3. 1.4 M

4. 0.45 M

Q.

A solution of sucrose (molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution. What is its osmotic pressure (R = 0.082 lit. atm.k^-1mol^-1) at 273 K?

1. 6.02 atm

2. 4.92 atm

3. 4.04 atm

4. 5.32 atm

Q. The mole fraction of solute in aqueous solution is 0.2. Calculate molality of solution.

Q. 90. Calculate degree of dissociation of 0.02M acetic acid at 298K. Give that (CH3COOH)=17.37Scm²m-¹, H+=345.8Scm²m-¹, CH3COO-=40.2Scm²m-¹

Q. Calculate the molality of a solution of urea in acetic acid if the mole fraction of urea in solution is 0.5 ( molecular weight of urea=60) (1) 50/3 (2) 25/3 (3) 100/3 (4) 40/3

Q. 10. The volume of 0.1molarity kmno4 required to oxidise 20ml of 0.1molarity oxalic acid in acidic medium is

Q. 50 g of CaCO3 will react with ___ g of 20% HCL by weight. 1. 36.5 g 2. 73 g 3. 109.5 g 4. 182.5

Q.

Normality is defined as:

1. Number of gram equivalents of solute per litre of solution

2. Amount of solute present in 100g of solution

3. Number of moles of solute per litre of solution

4. Number of moles of solute per 1000g of

Q.

How many moles of NaCl should be dissolved in 100 mL of water to get 0.2 M solution?

1. 0.2

2. 0.02

3. 0.1

4. 0.01

Q.

Experimental molecular weight of acetic acid is _____ that of theoretical molecular weight.

1. double

2. half

3. triple

4. same

Q. 44. Number of columb required to reduce 0.02 mole of benzaldehyde to benzyl alcohol is

Q.

Osmotic pressure of a solution is

1. Equal to the pure solvent

2. Lesser than the pure solvent

3. Greater than the pure solvent.

4. Both (B) and (C)

Q. The volume of 0.1N KMn04 required to oxidise 2.5g oxalic acid in acidic medium i

Q. equivalent weight of h2so4 in the reaction h2so4---------h2s

Q. If a cell is placed in a hypotonic solution :

1. None of the above
2. There will be a net flow of water into the cell, and the cell will gain volume.
3. There will be a net flow of water out of the cell, and the cell will lose volume.
4. There will be no net flow of water into or out of the cell, and the cell’s volume will remain stable.

Q. Molarity of acetic acid in 10% mass/volume of acetic acid?

Q. What is the graphical representation of log V vs log T ??

Q. 24.Two samples of CH3COOH each of 10 g were taken separately in two vessels containing water of 6 litre and 12 litre respectively at 27 degree Celsius the degree of dissociation of CH3COOH will be

Q. In a closed system A(s)=2B(g)+3C(g) if the partial pressure of C is doubled then partial pressure of B will be?

Q. what is the equivalent mass of Al2O3 ?

Q. The weight of HIO3 formed on reaction of 2.54 g of I2 with concentrated HNO3 is Options: Wrong 1.27 g 2.54 g 1.76 g Should have chosen 3.52 g

Q.

The average osmotic pressure of human blood is 7.8 bar at 37⁰C. What is the concentration of an aqueous NaCl solution that could be used in the blood stream

1. 0.16 mol/L

2. 0.32mol/L

3. 0.60mol/L

4. 0.45mol/L

Q. A $5\%\left(w/V\right)$ solution of cane sugar is isotonic with $0.878\%\left(w/V\right)$ solution of urea. Calculate the molecular mass of urea if the molecular mass of cane sugar is $342{\text{g mol}}^{-1}$.

1. $60.05{\text{g mol}}^{-1}$
2. $120.1{\text{g mol}}^{-1}$
3. $45.5{\text{g mol}}^{-1}$
4. $76.1{\text{g mol}}^{-1}$

Q. 4g of hydrogen gives how many moles of water?

Q. Volume Strength of 1.5N H2 O2 solution is

Q.

In equimolar solution of glucose, NaCl and BaCl₂, the order of osmotic pressure is as follows:

1. Glucose > NaCl > BaCl₂

2. NaCl > BaCl₂ > Glucose

3. BaCl₂ > NaCl > Glucose

4. Glucose > BaCl₂ > NaCl

Q.

What is the osmotic pressure of the solution obtained by mixing 300cc of 2% (m/v) solution of urea with 300cc of 3.42% solution of sucrose at 20^°C? (R = 0.0821 L atm K^-1 mol^-1)

1. 5 atm
2. 5.2 atm
3. 2.6 atm
4. 4.5 atm

Q. Eqⁿ => 2Mg + O2 -----> 2MgO Verify that -- "Gram Equivalents[G.Eq] of Mg = G.Eq. of O2 = G.Eq of MgO"

Q. 3.5 gm of solid Barium fluoride is added to water forming 1 lit of solution at 25°C. Solubility product of salt is 4 × 10–6. What will be the minimum volume of water to be added to above solution to dissolve the salt completely. (At. wt. Ba : 137, F : 19)

Q. Calculate the volume of 0.005M KMnO4solution required to oxidise completely 2.7g of oxalic acid(H2C2O4) in acidic medium.According to equation 2KMnO4 +3H2SO4+5C2H2O4->K2SO4 +2MnSO4 +8H20 + 10CO2