National Science Olympiad Forum By SOF Olympiad Trainer - Page 568

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
No, the correct answer is D. When written in decimal, the value of it comes out to be 0.2 and the rest are bigger than it. In fractions, as the denominator gets bigger, the number gets smaller.

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Subject :NSO    Class : Class 7

Which of the following statements are incorrect?
(i) Cellular respiration is a physical process in which food molecules are broken down into carbon dioxide and water.
(ii) Anaerobic respiration involves breakdown of glucose into alcohol and carbon dioxide.
(iii) Breathing rate varies according to oxygen requirement of the body.
(iv) On land, frogs breathe through lungs and in water by gills.
(v) Respiration in plants occurs through stomata and lenticels.

A(i), (ii) and (iv) only
B(i) and (iv) only
C(ii), (iii) and (v) only
D(ii), (iii) and (iv) only


Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :NSO    Class : Class 6

A science teacher labelled three glass slides as P, Q and R. She painted slide Q with light blue colour, slide R with black colour and slide P was left as such.
Then she asked students to put the slide on a white paper having (X) mark on it.
Students will be able to see the mark clearly (or partially)

A In slide P as it is translucent
B In slide Q as it is translucent
C In slide R as it is opaque
D In all the slides as paint does not change the nature of glass.


It's written'Students will be able to see the mark clearly (or partially)'. What should I do the question is not even making up it's mind!

Ans 1:

Class : Class 9

Ans 2:

Class : Class 6
All of them were made of glass. So if P was left as it is without painting wouldn't it be transparent??

Ans 3:

Class : Class 9
it is correct r is opaque and we would not be able to see the mark

Ans 4:

Class : Class 4
yes even c is the correct ans falguni is saying right

Ans 5:

Class : Class 3
why!

Ans 6:

Class : Class 9

Ans 7:

Class : Class 7
Even C is correct. In the workbook solution it’s given that slideR is supposed to be opaque

Ans 8:

Class : Class 6
Option A can also be a correct answer because the transparency of the glass is not mentioned. It can be translucent or transparent as well.

Ans 9:

Class : Class 8
Sorry for the typo answer C is incorrect

Ans 10:

Class : Class 8
Falguni and Tanmay , the C option is correct as R is opaque but the question is through which slide can we see the X mark clearly or partially and we can't see through because as you said R is opaque . Answer D is not correct either because colour affects the transparency of the slide. Answer A is not correct because P is transparent not translucent. That leaves us with Option B which is correct as Q is translucent and the students can see the X partially through it . Hope this explanation helps you clear all your doubts about this question.💜💜💜Oh and by the way completely not related to the question who else is an army ( BTS fans ) ?

Ans 11:

Class : Class 9
Bcoz when glass Q is painted with light blue we are still able to see the mark , that means its still translucent. When glass R is painted with black, we are not able to see as black is an opaque color. This what the logic meant for. So, option B is correct

Ans 12:

Class : Class 6
IT IS AND THE ANSWER IS B

Ans 13:

Class : Class 4
slide r is opaque and slide q is translusent

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :NSO    Class : Class 4

Nidhi knocked three metal thumbtacks into the middle section of a block of wood and covered this section with a piece of white paper. Then, she brought a lighted candle near this section.
After few seconds, she removed the lighted candle and found burn marks on the paper except on the areas where the thumbtacks were present. Which of the following best explains this observation?


A The paper was a good conductor of heat.
B The thumbtacks and the paper had different temperatures.
C Some parts of the wood absorbed the heat from the candle flame.
D The thumbtacks conducted heat away quickly before the paper could get burnt.


Ans 1:

Class : Class 9
IT IS D ANURADHA 4 C SVN KUTTUMUKKU

Ans 2:

Class : Class 6
I can't get the answer of this one.

Ans 3:

Class : Class 8
The correct answer should be A!!!!!

Ans 4:

Class : Class 8
No idea........can someone just tell me how D??????????????????????????????

Ans 5:

Class : Class 7

Ans 6:

Class : Class 5

Ans 7:

Class : Class 6
d

Ans 8:

Class : Class 3
The thumb tacks were a good conductor of heat it was knocked in the wood so it could have easily condected the heat in itself

Ans 9:

Class : Class 6
d

Ans 10:

Class : Class 7
The correct answer will be D

Ans 11: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
The correct answer is Option(C).

Ans 2:

Class : Class 10

Ans 3:

Class : Class 9
(c)

Ans 4:

Class : Class 7
correct option should be C

Ans 5:

Class : Class 8

Ans 6:

Class : Class 9

Ans 7:

Class : Class 8
the first option in coloumn two isnt even a graph!

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
d

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
Find the HCF / GCD of 378 and 588, you will get the answer.

Ans 2:

Class : Class 6
D because we should LCM as either Indian or Foreign stamps should be placed and max is LCM.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
graphite

Ans 2:

Class : Class 6
None of the above. No object can be conductor and insulator at the same time except for some elements like germanium and silicon.

Ans 3:

Class : Class 8
yes.....graphite is a electrical conductor and a heat insulator

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