The osmotic pressure of a solution, containing 45 gm of sucrose dissolved per litre of solution at 20 C o , is 3 . 2 atm . Calculate the value of constant R . (molecular weight of sucrose = 342 ).

We know that, Osmotic pressure π = iCRT = i × n V RT = i × m M V RT Where, R is the constant. m is the given mass of the substance M is the molecular weight of the substance T , C are the temperature and molarity of the solution respectively. R = V i × m M × T π = 1 2 × 45 343 × 293 K × 2 . 97 = 0 . 041 lit . atm / mol . K Therefore, the value of constant R is 0 . 0772 lit . atm / mol . K .

The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the following question Draw a neat, labelled diagram of an experimental setup to show that oxygen is released during photosynthesis.

Photosynthesis is the process by which plants prepare their own food. This process occurs in the leaves. The raw materials required for this process are carbon dioxide, water and sunlight. The products of this process are glucose (starch) and oxygen gas. Experiment to show that oxygen is released during photosynthesis.

EASY

Earn 100

Which of the plants around you need regular watering?

Important Questions on Abdul in the Garden

EASY

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

A solution of glucose containing $0.45$ gram in $250 mL$ water was prepared at $0 ° C$ . What is its osmotic pressure? $R = 0.0821 L . atm . / degree / mol$ .

EASY

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

Calculate the osmotic pressure of

0.01 M

solution of urea at

27 ° C

(R = 0.0821 L atm K^{- 1} {mol}^{- 1})

MEDIUM

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

Calculate osmotic pressure of the solution which contains $68.4$ gram sucrose in $1000 ml$ of solution at $293 K$ .

( $R = 0.082 litre atm K^{- 1} {mol}^{- 1}$ )

EASY

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

On the basis of osmosis explain the condition edema.

HARD

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

Which of the following solution has the lowest osmotic pressure?

HARD

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

The osmotic pressure of a solution, containing

45 gm

of sucrose dissolved per litre of solution at

20 {}^{o}C

, is

3.2 atm

. Calculate the value of constant

R

. (molecular weight of sucrose

= 342

EASY

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

Write definition of osmotic pressure.

MEDIUM

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the following question

Question Image

Draw a neat, labelled diagram of an experimental setup to show that oxygen is released during photosynthesis.

EASY

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

For a 5% solution of urea (Molar mass = 60 g/mol), calculate the osmotic pressure at 300 K. [

R = 0 \cdot 0821 L atm K^{- 1} {mol}^{- 1}

]

EASY

Environmental Studies>Life Science>Abdul in the Garden>Plants in the Garden

Calculate the osmotic pressure of a solution prepared by dissolving $0.025 g$ of $K_{2} {SO}_{4}$ in $2.0$ litres of water at $25^{o} C$ assuming that $K_{2} {SO}_{4}$ is completely dissociated. (molecular weight of $K_{2} {SO}_{4}$ $= 174 g {mol}^{- 1}$ ).