National Science Olympiad Forum By SOF Olympiad Trainer - Page 481

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
thanks for writing

Ans 2:

Class : Class 5
c;linen

Ans 3:

Class : Class 4
Linen as it comes from flax plant stem

Ans 4:

Class : Class 4
C. LINEN

Ans 5:

Class : Class 7

Ans 6:

Class : Class 3
C:linen

Ans 7:

Class : Class 7

Ans 8:

Class : Class 5

Ans 9:

Class : Class 10
C:linen

Ans 10:

Class : Class 4
Thanks a lot!

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
the correct option is C

Ans 2:

Class : Class 2
Answer C is the correct answer as incisors which are present in front most teeth help to bite the food. canines are present just after incisors and help to tear the food. premolars are present just after canines which help to crush the food. molars are present at the last which help us chew and grind the food.

Ans 3:

Class : Class 4
C

Ans 4:

Class : Class 4
OPTION C

Ans 5:

Class : Class 4
you are right

Ans 6:

Class : Class 10
option C

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7

Ans 2:

Class : Class 9
I don't understand the ANSWER as it also helps in mixing the nutrients uniformly in the soil.

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
how do you know that Kavan knows the correct answer

Ans 2:

Class : Class 7
is is b how

Ans 3:

Class : Class 7

Ans 4:

Class : Class 5
white you are rude for sure and it IS b

Ans 5:

Class : Class 9
Kanav , if you know the answer then why have you posted it on the forum ?

Ans 6:

Class : Class 3

Ans 7:

Class : Class 10
option B

Ans 8:

Class : Class 4

Ans 9:

Class : Class 4

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
answer is wrong it should be c

Ans 2:

Class : Class 5
souvik is saying 'avoid giving water to the person in case of poisoning so the poison does not spread in the body. and tying torniquet just above the wound will spread the poison more. so, the answer should be C

Ans 3:

Class : Class 8

Ans 4:

Class : Class 5

Ans 5:

Class : Class 6
answer is wrong because if we apply tourniquet it may damage the nerves. the poison will remain its place but it may kill all the cells there

Ans 6:

Class : Class 6
I think answer is wrong , use of tourniquet was preferred method until few years ago , it has been found it can damage blood flow and nerves

Ans 7:

Class : Class 6
the options are wrong...... even the explaination is wrong

Ans 8:

Class : Class 3
Answer is wrong, Souvik is saying 'avoid' while the answer is giving a different explanation .All Samrak, Souvik and Shivani are wrong.

Ans 9:

Class : Class 5
answer is ok.

Ans 10:

Class : Class 7
Answer is wrong

Ans 11:

Class : Class 8
OPTION OF ANSWERS ARE WRONG. SIMMI AND SAMRAT HAVE MADE WRONG STATEMENT

Ans 12:

Class : Class 6
I think answer is wrong. Shivani is also right. Using a tourniquet prevents the poisoned blood from reaching the heart.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
The correct answer is C

Ans 2:

Class : Class 3

Ans 3:

Class : Class 9
The correct answer is C.

Ans 4:

Class : Class 3
your answer is right

Ans 5:

Class : Class 3
online document so C

Ans 6:

Class : Class 4

Ans 7:

Class : Class 4

Ans 8:

Class : Class 8
C

Ans 9:

Class : Class 3
how can we send parcels on e-mail

Ans 10:

Class : Class 3
C

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9

Ans 2:

Class : Class 9
C only

Ans 3:

Class : Class 5

Ans 4:

Class : Class 8
c is the correct answer and solution is also given in favour of option c. but answer is b

Ans 5:

Class : Class 9
Apropos to the question the mass of the car has a role in the momentum of the car, as Momentum=mv ,therefore option 'C' should be the correct answer.

Ans 6:

Class : Class 9
Yes

Ans 7:

Class : Class 8
C should be the correct answer. Same has been explained in the solution also.

Ans 8:

Class : Class 9
No b is only

Ans 9:

Class : Class 7
if you read the solution properly it is quite clear that the answer is b

Ans 10:

Class : Class 6
Though it looks like mass has no role to play in braking distance, actually coeff of friction (COF) between tyre and road surface has inverse relationship with braking distance. COF depends on normal force due to weight of vehicle and therefore indirectly mass plays a role on braking distance. The correct answer should be C

Ans 11:

Class : Class 4
C is the correct answer. Force is applied to stop the vehicle. The formulae of force is mass * acceleration. Acceleration is final velocity - initial velocity by time. F= M*{(v-u)/t} and its kinetically equation is F=M *[v square - u square/ 2 * distance]. Which ever formula for force has been taken MASS is important. So clearly MASS HAS A ROLE TO PLAY. hence the answer must be C

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
The leaves should be destarched first, so that there is no presence of starch prior to the experiment in any of the leaves. In that manner, the experiment will be more clear. Therefore, Option A is also a potential answer.

Ans 2:

Class : Class 1
option B

Ans 3:

Class : Class 8
option b

Ans 4:

Class : Class 7
It should be destarched first

Ans 5:

Class : Class 5

Ans 6:

Class : Class 8
Destarching of leaf is a more effective way so option A should be correct

Ans 7:

Class : Class 8
option b

Ans 8:

Class : Class 7
The plant should be destarched first and then used for the experiment To accurately test for the presence of starch in leaves X and Y.

Ans 9:

Class : Class 8
option b

Ans 10:

Class : Class 7
it should be destarched first then keep the setup in sunlight because if we will directly test the presence of starch both the leaves will show blue -black color as there will be starch already present in both of them. So the correct answer should be OPTION A

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