National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

Aarushi took two food samples X and Y in separate test tubes. She added 2-3 drops of Benedict’s solution in food sample X and heated it while she added two drops of copper sulphate solution and few drops of caustic soda solution in food sample Y. She observed that sample X turned brick-red while sample Y turned purple.
Which of the following is correct regarding X and Y?

A X consists of protein while Y consists of starch.
B X consists of sugar while Y consists of protein.
C X consists of starch while Y consists of protein.
D X consists of sugar while Y consists of starch.


Ans 1:

Class : Class 6
answer is b

Ans 2:

Class : Class 6
The answer is actually C because starch consists of carbohydrates and sugars, but sugars is not the exact answer.

Ans 3:

Class : Class 7
The correct answer is b

Ans 4:

Class : Class 7
Answer is c

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Subject :NSO    Class : Class 4

Rohit performed an experiment wherein he set up three test tubes as shown in the figure. Select the INCORRECT statement regarding this.


ATest tube P will have most carbon dioxide after three hours.
BTest tube Q will have least oxygen after three hours.
COrganisms in test tube R will survive for a longer time as compared to organisms in test tubes P and Q.
DNo oxygen will remain in test tube P after some time.


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Ans 1:

Class : Class 4

Ans 2:

Class : Class 5

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 2:

Class : Class 3

Ans 3:

Class : Class 3
the correct answer is d

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 9
the field line travels from north to south

Ans 3:

Class : Class 7

Ans 4:

Class : Class 6

Ans 5:

Class : Class 7

Ans 6:

Class : Class 7

Ans 7:

Class : Class 6
understood?

Ans 8:

Class : Class 6
the answer is d because the field lines of a magnet always travle from north to south

Ans 9:

Class : Class 7

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7
Yes, the answer is option "C". It is not true that arteries will always carry oxygenated blood and the veins will always carry deoxygenated blood (pulmonary vein and artery).

Ans 5:

Class : Class 7

Ans 6:

Class : Class 7
C

Ans 7:

Class : Class 7
here option c holds true because in option a and b we can make an exception with pulmonary artery and vein.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
sea snakes also breathe through skin so option 1 should also be correct.

Ans 2:

Class : Class 6

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
Molars and Premolars are mainly used to chew the food.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 3

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7

Ans 5:

Class : Class 3
such questions r always confusing.................

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Subject :NSO    Class : Class 4

Refer to the given paragraph and table and answer the following questions.
Neha took 100 gm each of three types of soil, X, Y and Z, in three separate pots with hole at the bottom. The amount of water that was poured in the soil pot, just before it started dripping from the bottom hole, is tabulated here.

The soil that is mixture of clay, sand, humus and is usually very good for growth of most plants is __________.

A X
B Y
C Z
D Cannot be determined


Ans shd be D (Cannot be determined)

Ans 1:

Class : Class 4
B IS THE ANSWER ANURADHA NAIR 4C

Ans 2:

Class : Class 3

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