National Science Olympiad Forum By SOF Olympiad Trainer - Page 490

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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 5
white you are rude for sure and it IS b

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
is is b how

Ans 4:

Class : Class 10
option 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 4

Ans 8:

Class : Class 4

Ans 9:

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

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

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

Ans 3:

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 4:

Class : Class 5
answer is ok.

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 5

Ans 7:

Class : Class 5
answer is wrong it should be c

Ans 8:

Class : Class 7
Answer is wrong

Ans 9:

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 10:

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

Ans 11:

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

Ans 12:

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.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 9
The correct answer is C.

Ans 2:

Class : Class 8
C

Ans 3:

Class : Class 3
online document so C

Ans 4:

Class : Class 3
C

Ans 5:

Class : Class 4

Ans 6:

Class : Class 3
your answer is right

Ans 7:

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

Ans 8:

Class : Class 3

Ans 9:

Class : Class 3
The correct answer is C

Ans 10:

Class : Class 4

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Subject :NSO    Class : Class 7

Ans 1:

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

Ans 2:

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 3:

Class : Class 9
No b is only

Ans 4:

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

Ans 5:

Class : Class 9

Ans 6:

Class : Class 5

Ans 7:

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 8:

Class : Class 9
C only

Ans 9:

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

Ans 10:

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

Ans 11:

Class : Class 9
Yes

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
It should be destarched first

Ans 2:

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 3:

Class : Class 5

Ans 4:

Class : Class 8
option b

Ans 5:

Class : Class 8
option b

Ans 6:

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 7:

Class : Class 8
option b

Ans 8:

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

Ans 9:

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

Ans 10:

Class : Class 1
option B

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
all the questions answer is b

Ans 2:

Class : Class 5
b

Ans 3:

Class : Class 6

Ans 4:

Class : Class 4
B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
D is the answer

Ans 2:

Class : Class 5

Ans 3: (Master Answer)

Class : Class 1

Ans 4:

Class : Class 5
d is correct answer

Ans 5:

Class : Class 5
D

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