Osmosis

Q.

What happens when the cells are placed in the solution of salt or sugar in water ?

Q.

Blood has been found to be isotonic with

1. Normal saline solution
2. Saturated NaCl solution
3. Saturated KCl solution
4. Saturated solution of a 1 : 1 mixture of NaCl and KCl

Q. Which of the following is correct during osmosis?

1. Solvent molecules move from lower to higher concentration
2. Solute molecules move from lower to higher concentration
3. Solvent molecules move from higher to lower concentration
4. Solute molecules move from higher to lower concentration

Q.

Benzene and toulene form nearly ideal solutions. At 20^°C, the vapour pressure of benzene is 75torr and that of toulene is 22torr. The partial pressure of benzene at 20^°C for a solution containing 78g of benzene and 46g of toulene in torr is

1. 50
2. 25
3. 37.5
4. 53.5

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.

Two solutions A and B are separated by semi- permeable membrane. If liquid flows form A to B then

1. A is less concentrated than B

2. A is more concentrated than B
3. Both have same concentration

4. Cannot be predicted

Q.

The diagram given below is a vapour pressure for a binary solution of A and B. In the solution,

A - B interactions are

1. Similar to A - A and B - B interactionas

2. Greater than A - A and B - B interactions

3. Smaller than A - A and B - B interactions

4. Unpredictable

Q. The type of material which allows selective movement of molecules is called?

1. Permeable membrane
2. Semi-permeable membrane
3. Selectively permeable membrane
4. Non-permeable membrane

Q. Mowgli likes grapes a lot. He once got a huge bunch from a tree, but they were shriveled up. Baloo told him soak them in the bowl of pure water he had with him. Mowgli listened to Baloo and put them in there when his mother Raksha called him.
He came back after 2 hours and observed something. What did he observe?

1. The grapes became smaller.
2. The grapes increased in number.
3. The grapes became round.
4. The grapes remained the same.