National Science Olympiad Forum By SOF Olympiad Trainer - Page 482

User Forum

Subject :NSO    Class : Class 6

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

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 2:

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

Ans 3:

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 4:

Class : Class 8

Ans 5:

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

Ans 6:

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 7:

Class : Class 5
answer is wrong it should be c

Ans 8:

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

Ans 9:

Class : Class 5
answer is ok.

Ans 10:

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 11:

Class : Class 5

Ans 12:

Class : Class 7
Answer is wrong

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
online document so C

Ans 2:

Class : Class 9
The correct answer is C.

Ans 3:

Class : Class 8
C

Ans 4:

Class : Class 4

Ans 5:

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

Ans 6:

Class : Class 3

Ans 7:

Class : Class 3
C

Ans 8:

Class : Class 3
your answer is right

Ans 9:

Class : Class 3
The correct answer is C

Ans 10:

Class : Class 4

Post Your Answer

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

Ans 4:

Class : Class 9
No b is only

Ans 5:

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

Ans 6:

Class : Class 9
C only

Ans 7:

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

Ans 8:

Class : Class 9
Yes

Ans 9:

Class : Class 9

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 5

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 1
option B

Ans 2:

Class : Class 7
It should be destarched first

Ans 3:

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 4:

Class : Class 5

Ans 5:

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

Ans 6:

Class : Class 8
option b

Ans 7:

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 8:

Class : Class 8
option b

Ans 9:

Class : Class 8
option b

Ans 10:

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.

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
all the questions answer is b

Ans 3:

Class : Class 5
b

Ans 4:

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

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5
d is correct answer

Ans 3:

Class : Class 5
D

Ans 4:

Class : Class 5
D is the answer

Ans 5: (Master Answer)

Class : Class 1

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 3
very tough though the ans is c

Ans 2:

Class : Class 5
please explain

Ans 3:

Class : Class 5
tough one,i think the explanation is:S is lens and that part is not colored and t is either eye lids or cornea and neither of them is folded skin.acoording to me

Ans 4:

Class : Class 6

Ans 5:

Class : Class 4
wrong answer

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
What's the Correct answer?

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
both answers b and c are not advisable

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6

Post Your Answer