National Science Olympiad Forum By SOF Olympiad Trainer - Page 595

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 4
yes I also agree with you

Ans 2:

Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 3:

Class : Class 6
throughout the time period or the 21 swings the pendulum will pass through the point Y 21 times. so the answer is B(t/21)

Ans 4:

Class : Class 6
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllloooooooooooooooooooooooooooooooooooooooooooooo

Ans 5:

Class : Class 9

Ans 6:

Class : Class 8
Hi The Answer is T/10Sub To my YT:SkyPeRtan Wolf

Ans 7:

Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 8:

Class : Class 6
It should be T/21 only as T is the total time and no of times it passes Y is 21.Therefore the answer is T/21

Ans 9:

Class : Class 6

Ans 10:

Class : Class 9
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Ans 11:

Class : Class 8
Here, in this example, the pendulum passes through y 21 times. So, it will do 10 complete oscillations and 1 half which is basically touching y. Therefore, the time period of the pendulum is T/10.

Ans 12:

Class : Class 7
I agree with you

Ans 13:

Class : Class 8
Yes it should be t/10 as the pendulum will pass through point y twice in its one revolution...... so the the time period should be t/10

Ans 14:

Class : Class 3
The answer is right - it should be T/10

Ans 15:

Class : Class 6
it should be t/21

Ans 16:

Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 17:

Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
The answer is not B

Ans 2:

Class : Class 7
NA

Ans 3:

Class : Class 7
same

Ans 4:

Class : Class 2

Ans 5:

Class : Class 8
I ALSO AGREE WITH YOU ALL

Ans 6:

Class : Class 9
In process v, actually sublimation takes place

Ans 7:

Class : Class 7
Guys you are wrong process name is deposition but you need to cool it to water then freeze it

Ans 8:

Class : Class 7
I also agree with all of you . That's just impossible, I guess.

Ans 9:

Class : Class 2

Ans 10:

Class : Class 6

Ans 11:

Class : Class 6
How in processes v condensation came?

Ans 12:

Class : Class 6
gas to solid is deposition and opposite is sublimation ans wrong

Ans 13:

Class : Class 7
The answer can be B and D both.

Ans 14:

Class : Class 7
easyyyyyyyyy

Ans 15:

Class : Class 6
I do agree with Bhabani prasad

Ans 16:

Class : Class 8
Answer is B because to turn Water vapour into ice you need Deposition but water vapour cannot be deposited that is why you first need to turn the water vapour to water by condensation and then to convert water to ice you need freezing . Hence answer B is correct

Ans 17:

Class : Class 7
ya

Ans 18:

Class : Class 7
it is a direct change, so it does have to turn into liquid state

Ans 19:

Class : Class 6
We can express process v as deposition and how did condensation and freezing get involved

Ans 20:

Class : Class 7
easy

Post Your Answer

Subject :NSO    Class : Class 5

Shred a paper in tiny pieces. Take a comb and comb your hair. Now bring the comb closer to the paper pieces. What will you observe?

A The paper pieces will get repelled due to magnetic force.
B The paper pieces will get repelled due to electrostatic force.
C The paper pieces will get attracted and stick to the comb due to electrostatic force.
D The pieces will get attracted and stick to the comb due to frictional force.


Ans 1:

Class : Class 6
it can also be said as static electricity

Ans 2:

Class : Class 8
The answer is C

Ans 3:

Class : Class 8
The correct ans is option C because electrostatic force is a non contact force which is similar to magnetic force and the comb is like a magnet and tin pieces of paper are like the metal here (So the comb will attract the tiny pieces of paper).

Ans 4:

Class : Class 5
The answer is C

Ans 5:

Class : Class 5
C

Ans 6:

Class : Class 7
I prefer option C

Ans 7:

Class : Class 7

Ans 8:

Class : Class 5
Class :C

Ans 9:

Class : Class 7
yup

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
Mammals do not have 3 eyes

Ans 2:

Class : Class 8
Is cow have 6 legs and 1 eye on its forehead

Ans 3:

Class :
Ans is D

Ans 4:

Class : Class 8
All report an error they give all wrong only

Ans 5:

Class : Class 5
I thought this could be an insect as it HAS SIX LEGS. And some spiders( I know they are not insects ) have more than two eyes so it could be possible that the correct answer is b. But it has fur and is feeding its young one milk so the answer should be d

Ans 6:

Class : Class 7
ydejkcdhbjxdjkdajkdsjhdasjhdajhsadhjdaj

Ans 7:

Class : Class 5
The answer is D

Ans 8:

Class : Class 6
The answer is D.

Ans 9:

Class : Class 4
If this animal really existed it would have to be a monster that would eat us

Ans 10:

Class : Class 9

Ans 11:

Class : Class 5
ans is DBECAUSE IT IS A IMAGINARY ANIMAL

Ans 12:

Class : Class 7
Idiots, the monster fed milk to its young, a feature seen only in Mammals

Ans 13:

Class : Class 5
forehead? hahahahahahahahah

Ans 14:

Class : Class 6
IDIOTS just listen to them or maybe they are wrong

Ans 15:

Class : Class 7
As this question is already wrong a mammal can not have 6 legs.

Ans 16:

Class : Class 4

Ans 17:

Class : Class 8

Ans 18:

Class : Class 6
This is impossible because a cow has four legs not 6 legs and also it has two eyes not one eye and those two eyes are not on the forehead

Ans 19:

Class : Class 8
If the animal really existed it would have belonged to the same group as cow.

Ans 20:

Class : Class 5
Yes but in the question it said that the animal was imanginative can't believe what type of an animal it was.

Ans 21:

Class : Class 4

Ans 22:

Class : Class 5
I can say that they have fur but they don't have 6 legs and 1 eye on the forehead

Ans 23:

Class : Class 5
how can we tell what group is that animal if that doesn't exist

Ans 24:

Class : Class 5
It can't be D as they do not have six legs. no option is correct. I will report error for it is NOOT D

Ans 25:

Class : Class 8
this question makes no sense . 6 legs-can be an insect , eye on his forehead???

Ans 26:

Class : Class 5
Firstly , mammals do not have three eyes, secondly which mammal has six legs ???????????

Ans 27:

Class : Class 5
Ans D ( Cow)

Ans 28:

Class : Class 8
Mammals do not have 3 eyes

Ans 29:

Class : Class 6
This is impossible cow only as four legs and two eyes and those two are not on the forehead

Ans 30:

Class : Class 6
mammals do not have 6 legs and has more han 1 eye!

Ans 31:

Class : Class 9
The answer is D. Hair on skin and breast feeding the young ones are characteristic of mammals such as cow. So, if really existed, this animal would have been placed with cow.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
correct ans is C

Ans 2:

Class : Class 10
2 should be opaque and 1 transparent, or both opaque

Ans 3:

Class : Class 4
The solution itself explains that c is the correct ans. So that means m2 is opaque and m1 is transparent. Please someone correct this ans

Ans 4:

Class : Class 9
Ans is c as you see light can't pass through material 2 and can pass through material 1. According to SOF ans b which mean light can pass through cardboard and can't through clear pastic sheet!!!!!. Please correct this SOF or it can be a typing mistake. Thanks for reading.

Ans 5:

Class : Class 9
IF SOF CAN EXPLAIN THIS CORRECTLY, THEN I WILL STOP DOING PRACTICE OF ANY OLYMPIAD

Ans 6:

Class : Class 6
never use sof trainer they know nothing

Ans 7:

Class : Class 8
ans should be c!!! I am reporting an error

Ans 8:

Class : Class 6
Blunders made by SOF. PLEASE FIX THIS !!!!!

Ans 9:

Class : Class 5
howwwwwwww ccccccccccc

Ans 10:

Class : Class 5
There must be a technical issue because when I read the solution, it was written that the correct answer is C.

Ans 11:

Class : Class 8
The answer should be C. But answer is given B which is impossible.

Ans 12:

Class : Class 5
The guys who solved the paper and created this test was in hurry. So he did not take efforts to review his answers, hence many answers are wrong here. How will students trust on these guys?

Ans 13:

Class : Class 9
how is it B!?

Ans 14:

Class : Class 6
The sol says ans is C but it correct ans is B.

Ans 15:

Class : Class 5
answer is c sof is wrong

Ans 16:

Class : Class 5
I could not find any logic in this answer. Can anyone explain it? THANS FOR READING!!!

Ans 17:

Class : Class 8
ANSWER WILL BE 'C ' CAUSE THROUGH TRANSPARENT MATERIAL WE CANNOT SEE SHADOW OF A THING BUT THROUGH OPAQUE MATERIAL WE CAN SEE A THING'S SHADOW

Ans 18:

Class : Class 7
In the solutions it is showing C as correct option but in front It is showing B as the answer to this question. please correct the answer.

Ans 19:

Class : Class 4
and should be C and i did C cut now it is showing that i have done B!!

Ans 20:

Class : Class 2

Ans 21:

Class : Class 8
WHY YOU TYPE SO MANY C Ishaan

Ans 22:

Class : Class 5
how is it b