National Science Olympiad Forum By SOF Olympiad Trainer - Page 655

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
It is cooling towards room temperature so it does not solidify since the freezing point is below room temperature.

Ans 2:

Class : Class 9
B should be the correct answer I think

Ans 3:

Class : Class 7
B is the correct answer

Ans 4:

Class : Class 8
I think b is correct because there is no solidification

Ans 5:

Class : Class 9
i think b is correct

Ans 6:

Class : Class 10
i think there is no option correct in this ques. no evaporation and boiling is taking place as it is cooling down towards the room temperature. also no condensation is taking place as in the ques it is written a HOT liquid is being transferred to a beaker. as well as solidification may also not take place because room temp is above 0 degree centigrate. SOF PLEASE SEE TO IT THAT THIS TYPE OF WRONGG QUESTIONS AND SOLUTIONS ARE NOT POSTED.

Ans 7:

Class : Class 7

Ans 8:

Class :
i think b is the correct answer

Ans 9:

Class : Class 8
at 4 degree celsius water starts expanding and 'x' shows the same the room temperature might have been near or equal to the freezing point of water(eg room temperature of regions like arctic and antarctic)

Ans 10:

Class : Class 3
It cools towards room temperature so it does not freeze

Ans 11:

Class : Class 7
I think B is the correct answer because there is no solidification taking place or else the water would have turned into ice. plus no solidification can take place when water is at room temperature.

Ans 12:

Class : Class 3
Also freezing and melting point of water is 0 degrees celsius

Ans 13:

Class :
Three states - gas , liquid & solid When hot water temp is going down it will be ultimate become solid ie ice But before becoming ice temp will stagnant for some time where in both states liquid & solid co-exist==> some part of liquid is in ice form. X is the same state where in solid and liquid will co-exist. Hence option 4 is correct(solidification& evaporation) Note: Could not attach gif .It would have made it more clear.

Ans 14:

Class : Class 7
either b or d

Ans 15:

Class : Class 10
why?

Ans 16:

Class : Class 7
There is no proper solution for this question which will make it more confusing as everyone will have different opinions in this question.

Ans 17:

Class : Class 6
b is the correct answer

Ans 18:

Class : Class 8
I THINK THAT B IS ONLY THE CORRECT ANSWER

Ans 19:

Class : Class 7
i think b is the correct answer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
3

Ans 2:

Class : Class 3

Ans 3:

Class : Class 5
b

Ans 4:

Class : Class 4
Ug

Ans 5:

Class : Class 4
b

Ans 6:

Class : Class 4
Gibbons moom

Ans 7:

Class : Class 5
okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

Ans 8:

Class :
The answer is gibbous moon.

Ans 9:

Class : Class 4
3 Class

Ans 10:

Class : Class 9

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 9
A

Ans 2:

Class : Class 9
A

Ans 3:

Class : Class 5
a

Ans 4: (Master Answer)

Class :

The correct answer is A.

Both plants ‘c’ and ‘d’ bear fruits. This means they are flowering plants as only flowers change into fruits. Plant ‘c’ grows in water i.e., it is an aquatic plant but plant ‘d’ does not grow in water thus, it is a nonaquatic plant. Hence 'W' and 'X' represent plant ‘c’ and ‘d’ respectively.


Ans 5:

Class : Class 8
a is right

Ans 6:

Class : Class 4
Yes. A.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 2:

Class : Class 10

Ans 3:

Class : Class 9

Ans 4: (Master Answer)

Class :

The correct answer is B

In given figures, both the circuits are tightly connected and both the liquids conduct electricity because both the bulbs are glowing. The bulb in the set up P glows more brightly as compared to that of the set up Q might be because of any of the two possibilities:

1. The liquid in Q may have small conductivity. 

2.  Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P. 


Ans 5:

Class : Class 8
Yes.. Tightness is not mentioned.

Ans 6:

Class : Class 9
but how do we know that the circuit is conneced tightly???

Ans 7:

Class : Class 8
It’s not mentioned about tightness of the circuits.

Ans 8:

Class : Class 8
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

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Subject :NSO    Class : Class 4
Hi

Ans 1: (Master Answer)

Class :

Plaese mention your query


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Subject :NSO    Class : Class 3

Ans 1:

Class :
aayman please can you come online

Ans 2:

Class : Class 8
Drying is the answer !

Ans 3:

Class : Class 8
the answer of this question is drawing because when we dry something moisture is removed from it.

Ans 4:

Class :
Drying is the answer From aayman

Ans 5:

Class : Class 8
drying

Ans 6:

Class : Class 4
Well shiven

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Subject :NSO    Class : Class 8

Ans 1:

Class :

Ans 2:

Class : Class 8
it is one

Ans 3:

Class :
Ans.- (A) The buggy pulls the horse as backward just as hard the horse pulls the buggy forward. According to the IIIrd law of NLM( Newton's Laws of Motion), the action and reaction force takes place in two different bodies, in different direction , but of the same magnitude.

Ans 4:

Class : Class 8
Answer A will be correct if you take newtons third law of motion into consideration

Ans 5:

Class : Class 8

Ans 6: (Master Answer)

Class :

The correct answer is A.

The buggy pulls the horse backward just as hard as the horse pulls the buggy forward. Both of them would not move forward if surface is frictionless. 


Ans 7:

Class : Class 9

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class :
B

Ans 2:

Class : Class 9

Ans 3:

Class :

Ans 4: (Master Answer)

Class :

The correct answer is B.

In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.


Ans 5:

Class : Class 3
What about vitamin A which is also fat soluble and also stored in

Ans 6:

Class : Class 6
In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.

Ans 7:

Class : Class 6
In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.

Ans 8:

Class : Class 8

Ans 9:

Class : Class 3
What about vitamin A which is also fat soluble and also stored in fat tissues. The answer should be 'D' because the group Y consists of both vitamin A and vitamin E

Ans 10:

Class : Class 9

Ans 11:

Class : Class 7
EASY PEASY LEMON SQUEEZY!

Ans 12:

Class :

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 8
Explain how and why D?

Ans 2:

Class : Class 4

Ans 3:

Class : Class 6

Ans 4:

Class : Class 5

Ans 5:

Class : Class 4

Ans 6: (Master Answer)

Class :

The correct answer is D.

X is oesophagus with no change in amount of undigested food. Y is stomach and Z is small intestine with decreasing amount of undigested food and P is large intestine as no further digestion occurs here.


Ans 7:

Class : Class 8
very intelligent question , and answers too

Ans 8:

Class : Class 5
d

Ans 9:

Class : Class 9
why d please explain

Ans 10:

Class : Class 8

Ans 11:

Class : Class 3
Thank you Admin for explaining. It was helpful.

Ans 12:

Class : Class 9
D

Ans 13:

Class :
D

Ans 14:

Class : Class 4

Ans 15:

Class : Class 10
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Ans 16:

Class : Class 8

Ans 17:

Class : Class 10

Ans 18:

Class : Class 9

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Subject :NSO    Class : Class 9

Ans 1:

Class :
what is osmolarity

Ans 2:

Class : Class 9
amount of water entering the cell is osmolarity

Ans 3: (Master Answer)

Class :

The answer is C

The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases. 


Ans 4:

Class :
the concentration of a solution expressed as the total number of solute particles per litre.

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