National Science Olympiad Forum By SOF Olympiad Trainer - Page 647

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
It is plant P because if we compare 5 1/2cm with other measures, it will be the largest.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
A

Ans 2:

Class : Class 4
Guys!! Date palm grows in deserts. they are asking about a plant in hilly ares.

Ans 3:

Class : Class 5
I go with Jasnoor's option. A

Ans 4:

Class : Class 8

Ans 5:

Class : Class 5
Option D

Ans 6:

Class : Class 5

Ans 7:

Class : Class 8

Ans 8:

Class : Class 1
D.

Ans 9:

Class : Class 4
what is pollination

Ans 10:

Class : Class 5

Ans 11:

Class : Class 6
My Answer is DPollination is when pollen of a plant travels from one plant to another by something (i.e.Insect and water). Pollens are used to grow seeds in the plant

Ans 12: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 13:

Class : Class 3

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
DB

Ans 2:

Class : Class 9
@sjash the question is trying to say that E is second to the right of a, not c

Ans 3:

Class : Class 9
but the ques is wrong........if a is sitting between g and c, how is c second to the right of a ???????

Ans 4:

Class : Class 10

Ans 5: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Both 'C' and 'D' are correct

Ans 2:

Class : Class 7
agoogle says a

Ans 3:

Class : Class 7
option c is correct as acceleration means change of speed

Ans 4:

Class : Class 10
D as it is mentioned that the particle is travelling at a constant speed

Ans 5:

Class : Class 7
option c is correct

Ans 6:

Class : Class 9
c and d

Ans 7:

Class : Class 9
Both C and D I prefer. SOF pls check

Ans 8:

Class : Class 9
both options "C" and "D" are correct in my opinion cause as the car is moving at a constant speed there is no acceleration and as the car is being ridden on a straight road direction of movement also does not change, Hence proving that both option "C" and "D" are correct. I hope my answer was helpful. A very Happy New Year to all

Ans 9:

Class : Class 10
not c i think

Ans 10:

Class : Class 9
Both C and D are correct

Ans 11:

Class : Class 7
Both option C and option D are correct as since it is moving in constant speed, it's acceleration will be zero and the direction will not change as it was not mentioned and the particle is travelling on a straight road

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 2:

Class : Class 9
I am not able to understand it

Ans 3:

Class : Class 7
The correct is C

Ans 4:

Class : Class 7
Answer is (a). This is observed due to this reasonThere's a line which is making an angle 55° and is a linear pair. Hence the angle of line (mirror) p is 180°. But 55° is not the angle of incidence. To get the sum of angle of incidence and reflection, we multiply 55° by 2 and get 70°. Since angle of incidence =angle of reflection, 70°÷2=35°. The angle of incident ray and the reflected ray of P and Q are same thus the sum of the angle of incidence and angle of reflection would be the same (70°). We know, angle of incidence=angle of reflection, hence 70°÷2=35°. Or A=35°

Ans 5:

Class : Class 9
I actually don't get the logic behind it

Ans 6:

Class : Class 7
Here the properties of lines and angles will be applied.Then the laws of reflection

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 10
the answer should be B because cocave lens is a diverging lens which will diverge the light to all parts of the room

Ans 2:

Class : Class 8

Ans 3:

Class : Class 2
A

Ans 4:

Class : Class 5
Ans c

Ans 5:

Class : Class 7
The answer is B

Ans 6:

Class : Class 9
yes ans c

Ans 7:

Class : Class 7
0hi hi hih h hi hi hi hii

Ans 8:

Class : Class 8
ans= c

Ans 9:

Class : Class 7
The correct answer is D.

Ans 10:

Class : Class 9

Ans 11:

Class : Class 4
yes according to me also the answer is c but in nso practice papers it is written as d

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 2

Ans 2:

Class : Class 5
the answer is d

Ans 3:

Class : Class 4
NONE of these is the correct answer

Ans 4:

Class : Class 8
D is correct

Ans 5:

Class : Class 4
D is correct

Ans 6:

Class : Class 7
yes you are right

Ans 7:

Class : Class 4

Ans 8:

Class : Class 8
I think B and D is correct.

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Hydrochloric acid reacts with metals and corrodes them and is therefore stored in glass bottles... This question is wrong and so is the explanation.

Ans 2:

Class : Class 8

Ans 3:

Class : Class 10
Hcl reacts with metals also

Ans 4:

Class : Class 9
Hydrocloric acid is very corrosive and reacts with metals . So HCL is stored in glass bottles because it dont causes damage to it . ..........SO 3 statement should be true and their explanation is wrong .

Ans 5:

Class : Class 8
Inorganic acids such as minerals acid like HCL , H2SO4 etc . Are. Not always made in factories . HCL is produced in our stomach.

Ans 6:

Class : Class 7
Q is wrong since option 1 is false, rest all are true

Ans 7:

Class : Class 6
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 8:

Class : Class 7
Yes, I also agree. HCl is a strong acid and reacts with metals almost exactly like H2S04, it is also stored in glass for this reason, question is wrong.

Ans 9:

Class : Class 8
hcl reacts with metals too

Ans 10:

Class : Class 8
I completely agree... The HCl reacts with metals , which is major reason of why HCl is stored in glass bottles..

Ans 11:

Class : Class 5
You all are correct

Ans 12:

Class : Class 10
Hcl doesen't react with metals......Sulphuric acid does

Ans 13:

Class : Class 7

Ans 14:

Class : Class 10
Hcl doesnt react with glass. The explanation is wrong

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
i gave the correct answer but in the result they are showing that it is wrong.it is the same case with some other questions too.Please make a note that you correct it,thank you.

Ans 2:

Class : Class 7

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