National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 8

Refer to the given dichotomous key. Identify P-T and select the correct statement regarding them.
I. (A) It is a unicellular organism. - Go to II
(B) It is a multicellular organism. - Go to IV
II. (A) It possesses well organised nucleus. - Go to III
(B) It lacks well organised nucleus. -
III. (A) Nutrition is parasitic. -
(B) Nutrition is mixotrophic. -
IV. (A) It possesses chlorophyll. -
(B) It lacks chlorophyll. -

AP could be slipper animalcule.
BR could be Euglena which possesses cilia that help in movement.
CQ could be Plasmodium which causes malaria or it could be Entamoeba which causes amoebic dysentery in humans.
DS could be an alga like Chlamydomonas whereas T could be a scavenger like vulture or a decomposer like Giardia.


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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 7

During the science activity, class teacher arranged the test tubes as shown in the figure and asked students to predict the effect of various indicators on the given solutions.


Which of the following statements are correct?
I. Turmeric solution will turn red in test tubes 1 and 4.
II. Methyl orange will turn yellow in test tubes 1 and 3.
III. China rose indicator will turn dark pink in test tube 2.
IV. Blue litmus solution will turn red in test tubes 1 and 4.

AI and IV only
BI, II and IV only
CII and III only
DNone of these


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Subject :NSO    Class : Class 5

Padma conducted an experiment as shown below by using different materials.


Padma pulled on the spring balance until the material was separated from the magnet. The readings on the spring balance were recorded as shown in the table below.



What conclusions could Padma make from her experiment?
(i) Soft iron needs the largest force in order to be separated from a magnet.
(ii) Nickel is most easily magnetised while soft iron is least easily magnetised.
(iii) Nickel and cobalt are non-magnetic materials.
(iv) Steel makes the strongest permanent magnet.

A(i) only
B(iii) and (iv) only
C(i), (ii) and (iii) only
D(iv) only


A is the correct answer

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Subject :NSO    Class : Class 3

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