Explore topic-wise InterviewSolutions in .

Yes, we have a school song by the name ‘The Temple of Learning’. It tells us about how a school acts as a sheltered cocoon for students preparing them to take a flight spreading their wings in the beautiful world outside.

1. Teacher’s Day programme:

1. Welcome Speech by the Head Boy 

2. Speech on importance of teachers by the Head Girl. 

3. Felicitation of teachers 

4. Address by the Principal 

5. Cultural Programme 

6. Games 

7. Vote of thanks 

8. National Anthem 

9. Snacks

2. Exhibition of Science projects in classroom:

1. Welcome speech by monitor 

2. Ribbon cutting ceremony 

3. Speech by the Principal 

4. Judging of projects 

5. Prize distribution 

6. Vote of thanks 

7. National Anthem

3. Birthday celebration for grandfather:

1. Welcome grandparents 

2. Power point show on Grandfather 

3. Talks by relatives and friends 

4. Cake cutting 

5. Snacks and refreshment 

6. Vote of thanks

I – Personal pronoun (first-person pronoun)

In 1985 Ganga Action Plan came about.

The school in question is Balanand Vidyalaya.

Two reasons for launching Ganga Action plan are-

a. To improve quality of water of River Ganga.

b. To reduce the pollution load of River Ganga and make people aware of preventing pollution of Ganga river.

This plan was launched in 1985 by Mr. Rajeev Gandhi. 

Coliform bacteria were found in water of Ganga indicating contamination

Coliform group of bacteria that confirms the contamination of water.

1. The presence of coliform bacteria in rainwater.

2. Measurement of pH of rainwater.

A lamp can dispel or remove darkness and also help to light a thousand other lamps from its flames. Hence it is said to possess an amazing quality.

1. wastage 

2. silence 

3. knowledge 

4. belief 

5. rudeness 

6. civility

Coliform bacteria.

Coliform bacteria.

(i) Exosmosis (exit of water ) has resulted in the shrinkage of the protoplasm of cell B.

(ii) Plasmolysis and deplasmolysis.

(iii) When plant cells are kept in a h ypertonic solution, exosmosis takes place. This process is called plasmolysis.

(iv) Hyperton ic solution.

(v) The cell in B can be b rought back to its original condition by placing it in a drop of distilled water.

(vi) 1. Cell wall, 2. Plasma membrane, 3. Chloroplast.

Active Transport: Minerals in solution are transferred from a region of their lower concentration to one of their higher concentration by using metabolic energy.

Passive Transport: Minerals are transferred from a region of their higher concentration to a region of their lower concentration without using metabolic energy.

If some water enters in a closed can of dried seeds, the seeds absorb water by imbibition and osmosis and swell up. The swelling up of seeds exerts a force on the walls of the can, and hence the can bursts open.

Osmosis: Osmosis is a special type of diffusion which involves the movement of solvent molecules from a region of their higher concentration to their lower concentration.

The space between the cell wall and plasma membrane in a plasmolysed cell is filled with Isotonic solution. 

Marine fish when thrown under tap water bursts because of Endosmosis. 

(i) The process is called osmosis.

(ii) This process occurs in the root hair cells of plants.

(iii) The solution placed inside the dialysis tubing is generally strong sugar solution or salt solution.

(iv) The level of the solution in the capillary tube rises above the original level.

(v) Osmosis is a physiological process where the water molecules or solvent molecules move through a semipermeable membrane from a solution having a higher concentration of solvent molecules to the solution having a lower concentration of water or solvent molecules.

(i) The collective force exerted by the cortical cells of the root in forcing water upward into the xylem is known as root pressure.

(ii) The water level will rise in the glass tube.

(iii) Root pressure is forcing the water up in the stem.

(iv) To prevent evaporation of water from the tube.

(i) Osmosis.

(ii) Transfer of water or solvent molecules from a solution of lower concentration to a solution of higher concentration through a semi-permeable membrane is called osmosis.

(iii) Level of sugar solution rises in the stem of thistle funnel, whereas water level in the beaker falls.

(iv) A non-permeable membrane can be used in place of parchment paper for a control experiment.

(v) (1) Root hair cell sap corresponds to concentrated sugar solution.

(2) Cell membrane of root hair cell corresponds to parchment paper.

(3) Soil solution corresponds to water in the beaker.

(vi) Goat’s bladder or pig’s bladder.

(vii) (1) Helps in water absorption.

(2) Helps in stomatal opening and closing thus facilitating gaseous exchange.

(b) Passage of water and solutes in and out of the cell

(i) Plasmolysis

(ii) Hypertonic solution

(iii) (1) Nucleus, (2) Sugar drops, (3) Small vacuole, (4) Large vacuole.

(iv) Plant cell (1) Presence of cell wall, (2) Presence of large vacuole.

(v) It has to be placed in a hypotonic solution.

Sprinkling salt makes soil solution hypertonic hence grass lose water due to exosmosis.

(i) Flaccid.

(ii) Plasma membran e.

(iii) If the cell had been placed in distilled water it remains in a fully distended condition. Its plasma membrane remains in close contact with the cell wall and presses against it.

(iv) Chloroplast will be present in the protoplasm outside the vacuole.

(v) Cell wall.

The inward movement of solvent molecules through the plasma membrane of a cell Endosmosis.

Salt and sugar increase concentration of food, destroying bacteria by plasmolysis.

The solution outside the cell having lower solute concentration than the fluids is Hypotonic.

A Hypertonic solution concentration is greater than that of the cell sap.

(b) When solution becomes isotonic

Osmotic pressure is maintained in blood to prevent dehydration leading to shrinkage of cells.

Isotonic solution concentration is equal to the cell sap.

Endosmosis: It is the movement of water molecules from the surroundings into the cell.

Isotonic Solutions have the same osmotic pressure.

Exosmosis: It is the movement of water molecules from the cell into the outer surroundings.

Phenomenon of absorption of water by surface attraction is Imbibition.

Condition of cell in Plasmolysed the cell content are shrunken.

Plasmolysis: It is the shrinkage of protoplasm from cell wall when a cell is placed in a hypertonic solution.

1. False, 

It makes the cell flaccid.

2. False, 

The cells that have lost their water content are said to be plasmolysed.

3. True

(d) Suction pressure (SP) or diffusion pressure deficit (DPD)

The process by Osmosis raisins swell up when placed in a beaker of water.

(i) The process of osmosis.

(ii) Osmosis is a special type of diffusion of solvent molecules through a semi-permeable membrane from region of their higher concentration to the lower concentration region, but not vice-versa.

(iii) The level of water in column A will rise along with passage of time and will ultimately stop when concentration of water molecules are equal on both sides of the membrane.

(iv) (a) Parchment paper, (b) Egg membrane.

(v) Solution A.

(vi) It permits the movement of only water molecules to pass through it.

The process by Osmosis water enters the root hair cell.

(i) 1. Nucleus

2. Vacuole

3. Cell wall

4. Cell membrane

(ii) Part 4 is the cell membrane. It is semi-permeable. It allows only water molecules to pass through it.

(iii) Because it is an extension of epiblema cell.

(iv) By the addition of fertilizer, root hair becomes flaccid, because water will move out of it as soil water becomes hypertonic.