National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
D

Ans 2:

Class : Class 9
A

Ans 3:

Class : Class 7
I guess b since H2 can be obtained

Ans 4:

Class : Class 9
it should be A

Ans 5:

Class : Class 9
correct answer (A). natural gas is a clean fuel.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
black vessel will radiate more heat and cannot retain heat of water. so answer, is (B)

Ans 2:

Class : Class 9
we know that black absorbs heat but it also radiates heat

Ans 3:

Class : Class 9

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
harry's fastest lap time is 25.3 s the question says if he maintains his average speed of his FASTEST lap time if he completes his fastest lap in 25.3 s, he would complete 100 laps in 25.3 * 100 = approx. 2529 seconds

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
The animals in both option c and d do not have common mode of feeding.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
Squirrels are not herbivores, but omnivores.They feed on plants and animals.

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 2:

Class : Class 3

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Subject :NSO    Class : Class 3

The given diagram represents the water cycle. Select the INCORRECT option regarding the processes that are labelled as a, b and c.


A In process 'b', the water vapours that rises, cools down to form tiny drops of water which come together to form clouds.
B In process 'a', water from rivers, lakes and seas changes to water vapours due to the warmth of sunlight.
C In process 'c', clouds formed in process 'b' become full and fall back to Earth as rain.
D None of these


Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
correct option is A because sodium, being highly reactive,reacts violently with cold water while magnesium reacts only with boiling water.Less reactive metals like zinc and iron react with steam only.Noble metals like gold and silver do not react with water.

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
2272-875= perfectly divisible by N, 1397=multiple of N, factorisation of 1397 = 11*127, as 127 is a 3 digit no., N = 127, 1+2+7=10

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