National Science Olympiad Forum By SOF Olympiad Trainer - Page 589

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 6
Ans. is A sublimation

Ans 2:

Class : Class 9
Sublimation because it is the process of change of state of matter from solid to gas without changing into liquid state.

Ans 3:

Class : Class 9
The answer is A.sublimation

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
yes it 1 and 3 only

Ans 2:

Class : Class 9
Fractional distillation is used to separate liquids with less than 25 K difference in boiling points.

Ans 3:

Class : Class 9
3 and 1 only

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The correct answer is D

The electonic configuration of manganese (atomic number=25) is 1s2 2s2 2p6 3s2 3p6 3d5 4s2


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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
The answer is wrong

Ans 2:

Class : Class 10
here , statement 1 , 3

Ans 3:

Class : Class 7
Hibernation is done in winters not summers so OPTION A IS CORRECTTTTTT

Ans 4:

Class : Class 8
Okay manvi

Ans 5:

Class : Class 9
Statement 4 is wrong because hibernation is done to escape cold weather not hot , so SOF is wwwwwwwwwwrrrrrrrrrrrrrrrrrrrooooooooooooooonnnnnnnnnnnnnnnngggggggggggggggggggg

Ans 6:

Class : Class 8
YES The correct answer is (A).

Ans 7:

Class : Class 8
none of the answers are correct

Ans 8:

Class : Class 7
THE CORRECT ANSWER IS (A)

Ans 9:

Class : Class 3
none of the options are correct

Ans 10:

Class : Class 9
I WANT EXPLAINATION

Ans 11:

Class : Class 7
sof wrong ans there should be option like:only ii is correct

Ans 12:

Class : Class 9
bot

Ans 13:

Class : Class 8
Yes none of the options are correct

Ans 14:

Class : Class 8
statement 4 is wrong and none of the options is correct as response of plants towards earth is called geotropism

Ans 15:

Class : Class 8

Ans 16:

Class : Class 7
THE CORRECT ANSWER IS A

Ans 17:

Class : Class 5
not a because The response of plant towards the sun is called phototropism

Ans 18:

Class : Class 10
here all the statements are wrong except 3rd statement

Ans 19:

Class : Class 9

Ans 20:

Class : Class 9
option 4 if wrong. pls Chk soF other thn that all are correct .

Ans 21:

Class : Class 6
none of the options are correct as the only correct statement mentioned here is (ii)

Ans 22:

Class : Class 7
sof is wwwwwwwwwwwwwwwwwwwrrrrrrrrrrrrrrrrrrrrrrrrrroooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnngggggggggggggggggggggggggggggggggggggggggggg

Ans 23:

Class : Class 8
Option A is Wrong

Ans 24:

Class : Class 8
According to me Statement 2 is correct

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7
The Options Are wrong I guess because only (i),(ii)and(iii) are in use

Ans 2:

Class : Class 8
The Options Are wrong because only 123 are in use.

Ans 3:

Class : Class 7
The answer is correct, as when friction occurs, obviously, all of its properties will occur, even if not all of the properties are required. That's... how friction works.

Ans 4:

Class : Class 8

Ans 5:

Class : Class 8
The Options Are wrong because only 123 are in use.

Ans 6:

Class : Class 8
It's not asking about which properties occur (which would be all of them), it's asking which are in use. And that's only 1, 2, and 3. So the options are wrong

Ans 7:

Class : Class 8
All the properties friction are in use. Hence, the correct one option 'D'.

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The correct answer is C.


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
B) 2 and 3

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.

Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.

The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.

1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m,  and hence, the weight would increase.

2.  If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m,  and hence, the weight would decrease.


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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.

Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.

The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.

1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m,  and hence, the weight would increase.

2.  If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m,  and hence, the weight would decrease.


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