National Science Olympiad Forum By SOF Olympiad Trainer - Page 453

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
The answer has to be option A

Ans 2:

Class : Class 8
answer should be option a . Baking Soda is used to neutralize forming acid

Ans 3:

Class : Class 8
The answer is option A as baking soda neutralizes the effect of the formic acid

Ans 4:

Class : Class 7
yes

Ans 5:

Class : Class 9
your answer is wrong baking soda neutralize forming acid

Ans 6:

Class : Class 7
yes

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
answer option(d)ie H

Ans 2:

Class : Class 5
H

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
A

Ans 2:

Class : Class 3
B

Ans 3:

Class : Class 5
B-green leafy vegetables

Ans 4:

Class : Class 4
B

Ans 5:

Class : Class 3

Ans 6:

Class : Class 8
A . cereals , potatoes

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
D

Ans 2:

Class : Class 4
D

Ans 3:

Class : Class 8
Answer is D as both precipitation and condensation are involved in formation of dew in humid nights. The water vapor condenses to form clouds. But, if precipitation was not there, the dew would have remained in the clouds! So, precipitation is also involved in formation of dew on humid nights. Q and R are condensation and precipitation respectively. Thus, the answer is D(condensation and precipitation) and not B(only condensation).

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Yes it’s correct

Ans 2:

Class : Class 7

Ans 3:

Class : Class 4
how come??

Ans 4:

Class : Class 9
Since it is in a parallel circuit, resistance offered is more after one of the bulbs is fused. This will increase the brightness of the bulb but decrease the ammeter reading since current is inversely proportional to resistance

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
non of these as all the options are true

Ans 2:

Class : Class 6
non of these as all the options are true

Ans 3:

Class : Class 5
A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Ans is B. It is an error. Option B should display-'The main mineral present in this SEDIMENTARY rock is quartz' and the answer to that is Sandstone which is present in the grid

Ans 2:

Class : Class 3
Answer B is correct

Ans 3:

Class : Class 5
COAL IS NOT BLACK GOLD. ITS BLACK DIAMOND.............PETROLEUM IS NOT BLACK DIAMOND. ITS BLACK GOLD....................................................

Ans 4:

Class : Class 5
D

Ans 5:

Class : Class 6
the answer will be d as all are present in the grid

Ans 6:

Class : Class 6
answer is B. the main mineral present in this rock is quartz-sandstone sandstone can be found in the grid so it is the answer.

Ans 7:

Class : Class 3

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
How can a be the Ans?

Ans 2:

Class : Class 4

Ans 3:

Class : Class 9
answer is A

Ans 4:

Class : Class 4
A

Ans 5:

Class : Class 5
A is correct answer!

Ans 6:

Class : Class 4

Ans 7:

Class : Class 4
Ans a because C is for tearing food D for grinding and B are not permanant

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