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who introduced the idea of growing plants in soil-free and defined mineral solution ?

Assertion :- Water potential of a cell is affected by both solute and pressure potential. Reason:- Addition of solute and water both leads to increase in free energy of solution.

State whether the followig statement is true or false: The Aquous solution of an ionic compound conducts electricity because there are plenty of free electrons in the solution.

Assertion :- Plamolysis occurs in hypertonic solution. Reason:- In hypertonic solution, value of free energy is comparatively more negative than cell solution

Solutes present in any solution the free energy of water

7 audio cassettes and 3 video cassettes cost Rs.1110, while 5 audio cassettes and 4 video cassettes cost Rs.1350. Find the cost of an audio cassette and a video cassette.

There is increasing competition to upload the videos of road accidents instead of helping the victims. What is the mentaality of such people ?