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 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
ANS IS 17 * 17

Ans 2:

Class : Class 6
298

Ans 3:

Class : Class 6
It is the square of the numbers.

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

Three test tubes are set up as shown. The indicator used here changes from red to yellow when exposed to increased levels of carbon dioxide. At the start of the experiment, the indicator in each test tube was red.


What will be the colour of the indicator in each test tube after two hours?

a b c
A Yellow Yellow Red
B Red Yellow Red
C Yellow Red Red
D Yellow Yellow Yellow


Please explain how the test tube with insects will turn yellow.

Ans 1:

Class : Class 7
It will be yellow because of Carbon dioxide released by respiration of insects.

Ans 2:

Class : Class 7
The indicator in the leaves will also turn yellow as respiration and photosynthesis occur at the same time during the day.

Ans 3:

Class : Class 7
Anantha Narayanan M S from CHIREC International School, Kondapur, Hyderabad, HyderabadClass : >Class 7 2 months agoThe indicator in the leaves will also turn yellow as respiration and photosynthesis occur at the same time during the day. but they did not specify that it was during the day

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 2
HI, If you unscramble SECIIUDOL it gives DELICIOUS. Thanks, Anamkhan

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