National Science Olympiad Forum By SOF Olympiad Trainer - Page 302
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Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

A periodic motion may or may not be oscillatory .For example , motion of earth about sun is periodic but not oscillatory.

During circular motion of an object , its direction of motion changes with time and hence the velocity.So,the acceleration of the object is non zero. 

Aluminium is a good conductor of electricity .Hence, statement v is wrong.

 


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Mohammed Najl from Credence high school Dubai, Dubai
Subject :NSO    Class : Class 5

Ans 1:

Amal Amzath Ali from jss international school, dubai
Class : Class 7
option C is correct. For explanation see explanation

Ans 2:

Amal Amzath Ali from jss international school, dubai
Class : Class 7
* SOLUTION

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Arav Jain from Global edge school, Hyderabad
Subject :NSO    Class : Class 7

Ans 1:

Maanasa from Billabong high, Chennai
Class : Class 7
Yes

Ans 2:

Jyotsna from Prakriya, Bangalore
Class : Class 7
But disc one is the white part and chlorophyll is necessary for photosynthesis. The point of this experiment is necessity of chlorophyll. And it says does/do not. Please be more clear about the question

Ans 3:

Arav Vilas Musale from Narayana e-techno school, Nanded
Class : Class 7
the answer should be option d as discs 1 and 2 are not covered and 3 and 4 are covered

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Dishen Mittal from The Gurukul Sector 20, Panchkula
Subject :NSO    Class : Class 4

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Dishen Mittal from The Gurukul Sector 20, Panchkula
Subject :NSO    Class : Class 4

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from dps north kolkata, Kolkata
Subject :NSO    Class : Class 7

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vishnu raghav from christ academy, bengaluru
Subject :NSO    Class : Class 5

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R SANKARSHNAN from NPS, BANGALORE
Subject :NSO    Class : Class 3

Ans 1:

Anagh Agrawal from Billabong high, JABALPUR
Class : Class 3

Ans 2:

Haarish from Amrita, Puducherry
Class : Class 5

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Mrittika Roy from DPS Ruby Park, Kolkata
Subject :NSO    Class : Class 7

Digestive juices were collected from three different regions of the alimentary canal. Drops of these juices were added to wells made in an agar of starch as shown in the given figure.

After an hour, the wells were rinsed with distilled water and flooded with iodine solution. The results are given in the table.

Well 1 2 3
Colour of iodine
solution		 Blue-black Yellow - brown Yellow - brown
Which of the following correctly identifies the regions of the alimentary canal from which the three digestive juices were obtained?

AWell 1 represents region that contains an enzyme pepsin that causes the breakdown of proteins into simple substances.
BWell 2 could represent region that contains an enzyme called salivary amylase.
CWell 3 could represent region that is the longest portion of alimentary canal and receives bile juice from liver and pancreatic juice from pancreas.
DAll of these


The options are placed wrongly. Well 1 cannot turn blue-black as it has protein. Well 2 should turn blue-black because it has starches. Only option c is correct. The answer is C

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
I guess the answer is option D.. You see that if well 2 has salivary amylase, then the starch will be converted into simple sugars => No starch is found from that well (it has converted to simpler form)

Ans 2:

YASH SAH from DELHI PUBLIC SCHOOL MIS DOHA, Doha
Class : Class 8

Ans 3:

Mohan Bhosale from RNS international school himayatngar, Nanded
Class : Class 7
Answer is option B

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Sargah Surya from bgsnps, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
Option c is right..

Ans 2:

SHREYAS ANDOTRA from RYAN INTERNATIONAL SCHOOL, CHANDIGARH
Class : Class 8
please specify reason

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