National Science Olympiad Forum By SOF Olympiad Trainer - Page 39

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Subject :NSO    Class : Class 10

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Class : Class 10

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Subject :NSO    Class : Class 9

Take a clean glass slide and put few drops of water on it. Now place a complete Rheo leaf on water droplets and examine the cells of leaf under the high power of compound microscope. Put a few drops of concentrated salt/sugar solution on the mounted Rheo leaf on the glass slide. Wait for few minutes and again observe the leaf under the high power of microscope.
What will be your observation after few minutes?

A Cell contents are separated from the cell wall.
B Cytoplasm along with plasma membrane has come to lie on one side of cell wall.
C A clear space is seen between the cell wall and protoplast of the cell.
D All of these


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Subject :NSO    Class : Class 9

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Class : Class 9
WHy is the answer option A/ It is certainly incorrect. In the quiestion it has asked what is incorrect, and SER certainly is involved in the detoxification of poisions and drugs in liver cells. The answer should be none of thees

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Class : Class 10

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Class : Class 9

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 9

Select the incorrect statement(s).
I. Rapid formation and breaking of bubbles in the bulk of a liquid being heated is called evaporation.
II. The spreading out and mixing of a substance with another substance due to motion of its particles is called diffusion.
III. Petrol evaporates faster than water because interparticle forces are stronger in water.
IV. Ice-cream feels colder than ice cold water because of latent heat of fusion.

A I and IV only
B I only
C II, III and IV only
D III and IV only


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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 2

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Class : Class 2

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Subject :NSO    Class : Class 6

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