National Science Olympiad Forum By SOF Olympiad Trainer - Page 260
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Angel Kansal from BAL BHARATI PUBLIC SCHOOL, DELHI
Subject :NSO    Class : Class 7

A few substances are listed in the box.

(i) Sulphuric acid
(ii) Sodium bicarbonate
(iii) Sodium hydroxide
(iv) Ammonium hydroxide
(v) Sodium sulphate
(vi) Ammonium sulphate
(vii) Sodium chloride
(viii) Formic acid
(ix) Tartaric acid
(x) Nitric acid
Now, read the given passage and select the correct option. Substances __(p)__ are strong mineral acids while substances __(q)__ are weak organic acids. Aqueous solutions of substances __(r)__ will turn China rose indicator green while substances __(s)__ will have no effect on China rose indicator.

  (p) (q) (r) (s)
A (i), (x) (viii), (ix) (ii), (iii), (iv) (v), (vii)
B (i), (iii) (v), (vii) (ii), (viii), (x) (iv), (vi), (ix)
C (ii), (v) (iii), (vii), (ix) (i), (vi) (iv), (viii), (x)
D (i), (iii) (viii), (ix), (x) (ii), (v), (vii) (iv), (vi)


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Hritvi from Podar International School, Mumbai
Subject :NSO    Class : Class 7

The given graph shows rate of CO2 uptake over 24 hours by two potted plants X and Y kept in direct sunlight with all similar conditions viz. same sized pots with equal amount of soil and manure, adequate moisture and air.

Select the best possible option regarding X and Y.

APlant X is actively photosynthesising between 20 hrs to 24 hrs.
BPlant Y shows stomatal closure between 10 hrs to 18 hrs.
CPlant X shows maximum transpiration between 12 to 14 hrs.
DBoth B and C


Option D

Ans 1:

Hritvi from Podar International School, Mumbai
Class : Class 7
Option D

Ans 2:

Dhairya Vinayak from Loyola High School, Patna
Class : Class 8
OPTION D

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Inesh Biswas from Adamas International School, Kolkata
Subject :NSO    Class : Class 3

Ans 1:

Samarth Arcot Praveen from National Public School Rajajinagar, Bangalore
Class : Class 3
,,

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Proteins are building blocks of the body as they form tissues and muscles. They help in repair and maintenance of body. Proteins are found in meat, poultry & fish, pulses, eggs, and milk & milk products like yoghurt and cheese. So, X can be Protein.


Ans 3:

Sushree snehasikta behera from Mother's public school , Bhubaneswar
Class : Class 2
protein help with the growth of our body.They help in repair our body.Proteins are present in meat, eggs, fish ,milk ,and in milk products.So X can be protein

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SIDDHARTH SOMANI from Vibgyor High, Mumbai
Subject :NSO    Class : Class 3

Ans 1:

Kanishk gupta from Prime academy, Mumbai
Class : Class 4
C

Ans 2:

Anshuman from Army Public School Kirki, Pune
Class : Class 6
19th answers is correct

Ans 3:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7

Ans 4:

Darsh Ranjan from Vibgyor High, Bangaluru
Class : Class 3

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Shape of the shadow will deped on the edges of the object presented to the light source. So, if the same object is rotated the shadow will change its shape.


Ans 6:

Hamsini from yagappa, Thanjavur
Class : Class 4

Ans 7:

Kanishk gupta from Prime academy, Mumbai
Class : Class 4
C

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Srihari g from silveroaks, hyderabad
Subject :NSO    Class : Class 10

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Aditri Dixit from TCIS, Bangalore
Subject :NSO    Class : Class 3

Ans 1:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 2:

Ashlynn Bhatia from Modern Vidya Niketan Sr. Secondary School Sector - 17, FARIDABAD
Class : Class 3
admin actually you are wrong . Helicopter is means of air transport and the other three are means of land transportSo, answer is B

Ans 3:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

Bus is a means of land transport while the other three are means of air transport.


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Aditri Dixit from TCIS, Bangalore
Subject :NSO    Class : Class 3

Ans 1:

Kashika Goel from DPS Noida, Noida
Class : Class 6

Ans 2:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A

The picture shows a postbox in which we put letters, postcards etc. It is related to a post office.


Ans 4:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

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arnav from Dps noida, Delhi
Subject :NSO    Class : Class 6

Ans 1:

Siddhartha from Gyanfort school, Farrukhabad
Class : Class 6
I suggest to buy or download pdf of sample papers. In this forum you can even answer others questions for practice.

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Shweta Garg from Vibgyor high, Vadodara
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement I : Jute is used to make containers for young saplings that can be planted directly.
Statement II :Jute cannot be easily decomposed by microorganisms.

ABoth statements I and II are true and statement II is the correct explanation of statement I.
BBoth statements I and II are true but statement II is not the correct explanation of statement I.
CStatement I is true but statement II is false.
DBoth statements I and II are false.


Ans 1:

Aarav Kamdar from Global Indian International School, Singapore
Class : Class 7

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Jute is used to make containers for young saplings that can be planted directly because they are biodegradable.


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Shweta Garg from Vibgyor high, Vadodara
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

1 dm ----1/10 m 
1 mm ------1/1000 m 

1 km----- 1000 m

1 cm---------1/100 m 


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