Osmosis

Q. 77.Ppm is defined as number of parts by mass of a solute present in per million parts of solution

Q. mass percentage ofurea in 0.5 molal aqueous solution ofurea is

Q. no. of unit cell in 0.1 g molecule of NaCl

Q.

In osmosis, water moves from

1. Higher conc. to lower conc. of solvent

2. Lower conc. to higher conc. of solute

3. Higher water potential to lower water potential

4. All of the above

Q. Calculate the volume of CO2 gas produced at STP when 10 g of C is burnt in 22.4 L of O2 at STP

Q.

Two solutions $S_1$ and $S_2$ containing 0.1 M NaCl (aq) and 0.05 M $BaC{l}_2\left(aq\right)$ are separated by semipermeable membrane. Which among the following statement(s) is/are correct? (Assume complete dissociation of both the electrolytes).

1. $S_1$ and $S_2$ are isotonic

2. $S_1$ is hypertonic while $S_2$ is hypotonic

3. $S_1$ is hypertonic while $S_2$ is hypertonic

4. Osmosis will take place from $S_1$ to $S_2$

Q. Explain the order of boiling pt between alkane alkene alkyne in detail.

Q. 9. An important method of removing soluble impurities of solution is: Dialysis Peptization Sedimentation All of the above

Q. What is the molarity of a solution that contains 122 g of MgSO4 in 3.5 L of solution?

Q. What is meant by volume strength. Calculate the volume strength of 3% H₂O₂ solution

Q. The osmotic pressure of a solution of an organic substance containing $18g$ in one litre of solution at $300K$ is $2.7\times {10}^{5}Pa$ .Find the molecular mass of the substance.
Take $R=8.3Jmo{l}^{-1}{K}^{-1}$

1. $65gmo{l}^{-1}$
2. $189gmo{l}^{-1}$
3. $166gmo{l}^{-1}$
4. $212gmo{l}^{-1}$

Q. which is more concentrated:- a).1 molal solution or b).1molar solution

Q. What is the relation between half life and t 90%

Q. 57. An ideal gas mixture of ethane C_2H_6 and ethene C_2H_4 occupies 28 litre at 1 atm and 0 degree celcius. The mixture completely reacts with 128 gm O_2 to produce CO_2 and H_2O. Mole fraction at C_2H_6 in the mixture is

Q. explain how to predict the shape of NH3 and XeO3?

Q. What is meant by dipole moment ?

Q. Assertion : H_2Se is less acidic than H_2S. Reason : S is less electronegative than Se.

Q. 17. What is meaning of the statement that equilibrium of water lies mainly towards undissociated water ?

Q. How to find limiting reagent?Iam having trouble to find the limitin reagent

Q. 40. How many g of dibasic acid (mol. weight 200)should be present in 100 ml of aqueous solution to give strength of 0.1 N

Q.

Semipermeable membrane is that which permits the passage of:

1. Solute molecules only
2. Solvent molecules only
3. Solute and solvent molecules both
4. Neither solute nor solvent molecules

Q. Why is the diffusion of gas very high

Q. What is mean by concentration of solution

Q. An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because: