National Science Olympiad Forum By SOF Olympiad Trainer - Page 599
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Riya Singhani from BVB vidhyashram, jaipur
Subject :NSO    Class : Class 8

Ans 1:

Satvik Mehta from St Andrews school Bowenpally, Secunderabad
Class : Class 4
Fdvdfvdfbrfbfgbfgbt

Ans 2:

Aryan Raina from MGN Public School, Jalandhar
Class : Class 8
this answer is wrong correct answer is b

Ans 3:

Siddharth Mahesh from mdav public school , Hyderabad
Class : Class 8

Ans 4:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
I agree, it should ideally be B, as iris IS indeed the part of the eye that gives it colour

Ans 5:

Gaurish Singla from DPS School Sector 19, Faridabad
Class : Class 8
Answer should be (b)

Ans 6:

Dhanya Krishnaji from ISG, Muscat
Class : Class 8
IT’S B!! SINCE WHEN DID THE CORNEA BECOME THE PART WHICH GIVES LIGHT??

Ans 7:

Neh singla from Delhi public school, Chandigarh
Class : Class 5
yes you're right

Ans 8:

Rishith Sunil from BVM Global BHS, Chennai
Class : Class 8
D

Ans 9:

Bipasana from KV IIT Kanpur, Kanpur
Class : Class 9
I think it's B??

Ans 10:

Kashvi Rawat from Gear Innovative International School, Bengaluru
Class : Class 3
not B? I'm pretty sure the iris gives colour to the eye...

Ans 11:

Satvik Mehta from St Andrews school Bowenpally, Secunderabad
Class : Class 4
Yes the answer is wrong it should be b.iris gives colour to the eye not the cornea

Ans 12:

Vayun from NPS HSR, Bengaluru
Class : Class 8
Answer is b as Cornea does not give colour to eye

Ans 13:

Dhanya Krishnaji from ISG, Muscat
Class : Class 8
Since when did cornea become the part which gives colour? I’m lost ,shouldn’t the answer be b?

Ans 14:

Anusha from LBS School , Kota
Class : Class 10
The correct answer is B. Iris gives color to the eye.

Ans 15:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
IT IS OPTION (B)

Ans 16:

Akshara from NPS, Bengaluru
Class : Class 8
I have done this test many times, and this issue is still not rectified.. It is the iris which gives colour to our eye and not the retina. Please look into this issue!

Ans 17:

Bhramana Roy from Glendale Academy International, Hyderabad
Class : Class 8
I think the given answer is wrong, as it states the correct answer is option D. Option D says Iris does NOT give colour to the eye, but actually, the iris is the coloured part of the eye. Thus, the correct option should be option B.

Ans 18:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 6
correct is B

Ans 19:

Tanmayi kiran giri from airforce force public school Vayusena Nagar, Nagpur, nagpur
Class : Class 9
same even i think it should be b bcuz the iris gives colour to the eye and not the retina

Ans 20:

Aanya from DAV, Gurgaon
Class : Class 8
The answer will be option {B} because Iris gives color to the eyes.

Ans 21:

Akshara from NPS, Bengaluru
Class : Class 8
Correct answer is B. It is the iris which gives colour to the eye ( not retina)Retina forms the inverted image .

Ans 22:

The Address from Somaiya, Mumbai
Class : Class 6

Ans 23:

Kriday from KDAV, Jamnagar
Class : Class 4
yes the answer is wrong because this states that the cornea gives colour to eyes which is wrong

Ans 24:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
seriously I am confused.. what should I follow?!?!?!.. The book or this?.. book says that iris gives colour to eyes and online says RETINA?!?!.. my mind is blown.. if this happens in the actual exam marks will be reduced drastically.. I am confused and angry

Ans 25:

Aanya from DAV, Gurgaon
Class : Class 8

Ans 26:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
It’s b

Ans 27:

Antarik Maity from Bharatiya Vidyabhaban, Kolkata
Class : Class 8
The correct answer should be option(B) as Iris is the part of the eye which gives its color and not the retina as retina is the innermost part of the eye. But in the solution it is given that retina of the eye gives its color. Iris contains colored pigments which give the eye it s color.

Post Your Answer

tanmay from amaatra academy, bangalore
Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8
why it can't be distillation ?

Post Your Answer

Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 5

Ans 1:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 2:

Raksheet Shah from Swami Vivekanad International School, Mumbai
Class : Class 8
oh yeah

Ans 3:

Zayed Zaman from Global indian international school, Singapore
Class : Class 5
THERE'S A WEIRD PATTERN IN THERE... in figure 1 and two they skip a figure, in figure 3 and 4 they skip two figures and so on so forth.

Ans 4:

Rimi from TLISK, pune
Class : Class 9
I agree with you Zayed

Ans 5:

Daivik Goel from Delhi public school , Vadodara
Class : Class 4
In the picture there is a pattern . Between problem figure 1&2,it moves 1 step ahead.Between problem figure 2&3, it moves 2 steps ahead.Between problem figure 3&4,it moves 3 steps ahead.Between problem figure 4&5,it moves 4 steps ahead.So in the next problem figure 5&6,it will move 5 steps ahead .So the right option is-(A). It is so easy!!!!!!!!!!!!!!!!! Put your brains!!!!!

Ans 6:

Mannat Verma from Vivek High School , Chandigarh
Class : Class 6
Who do you think you are?

Ans 7:

Shreyas Singh from Podar International School, Pune
Class : Class 6

Ans 8:

Annavi Bajpayee from DPS Sector 19, Faridabad
Class : Class 7
A Add 45 degrees in subsequent figures. Add 225 deg in the fourth fig to reach at A

Ans 9:

Shreyas Singh from Podar International School, Pune
Class : Class 6

Post Your Answer

Sagar G V from Tuto Bytes, Hyderabad
Subject :NSO    Class : Class 4

Ans 1:

Vibha from Birla Public School, Doha
Class : Class 7
THE CORRECT ANSWER IS C

Ans 2:

S from , JAJAPUR
Class : Class 4

Ans 3:

k tagore from montessori school, KURNOOL
Class : Class 3

Ans 4:

somesh from Centre point katol road, Nagpur
Class : Class 6
C

Ans 5:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
THE CORRECT ANSWER IS C OPTION

Ans 6:

k tagore from montessori school, KURNOOL
Class : Class 3

Ans 7: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Post Your Answer

Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 5

Ans 1:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is A because lungs send oxygen-rich blood to the heart and this oxygen-rich blood is sended to all body parts and the carbondioxide-rich blood goes back to the heart from the body this carbondioxide-rich blood is sended to the lungs.

Ans 2:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8

Post Your Answer

Navneet Mathur from St Mary Convent Senior Secondary , Ujjain
Subject :NSO    Class : Class 7

Read the given passage.
In a flower, produces pollen grains. Pollen grains are deposited on of pistil. carries male gametes to the ovule. Fusion of male and female gametes is called. After fertilisation, develops into fruit and develops into seed. Select the correct option which fills the blanks with atleast three correct answers.

A2-Style, 4-Fertilisation, 5-Ovary
B1-Anther, 3-Pollen tube, 6-Ovule
C2-Stigma, 3-Filament, 5-Ovary
D1-Anther, 2-Stigma, 4-Pollination


will anyone tell me where is the 4th blank? and what is wrong in option a

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
4 th blank will be filled with fertilisation correct ans is b Pollen grains are deposited on stigma and not style

Post Your Answer

Arkoprava Dey from Techno India Group Public School, Coochbehar, Coochbehar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

Post Your Answer

ANSHUMAN RAJ from ST.THERESA'S CONVENT SR.SEC.SCHOOL KARNAL, KARNAL,HARYANA
Subject :NSO    Class : Class 3

Read the given statements and select the correct option regarding the subject of discussion.
Sanjay : Railways involve high construction and maintenance cost.
Kunal : A few states of India lack a good railway network.
Amit : The construction of railways is very difficult and costly in flat land whereas it can easily be done in mountainous region.
Rajeev : Areas with less industrial development cannot compensate the cost of construction of railways , hence have less railway network.

A Only Sanjay and Amit are correct.
B Amit and Rajeev gave the reasons of Kunal’s statement.
C Sanjay and Rajeev gave the reasons of Kunal’s statement.
D Amit gave the explanation of Sanjay’s statement.


I like this question 👍

Ans 1:

ANWESHA THAKUR from DPS SECTOR 132 NOIDA, NOIDA
Class : Class 7

Ans 2:

Yatindra G from SBOA, Chennai
Class : Class 4
c maybe????

Ans 3:

Bushra aslam from uttam, Ghaziabad
Class : Class 8

Ans 4:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7

Ans 5:

Shruti from ,
Class : Class 1
D HE GAVE EXPLANATION

Ans 6:

Anagha from DPS BANGALORE NORTH, Bengaluru
Class : Class 3
It should be D

Ans 7:

Aditri Dixit from TCIS, Bangalore
Class : Class 3
NA

Ans 8:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 9:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 10:

Abhilash from ,
Class : Class 3
ahh... very easy answer is d

Ans 11:

Vedansh from Akshara International school, Phne
Class : Class 3
c is the correct answer

Ans 12:

MAYANK from Jain Public School, REWARI
Class : Class 9
C

Ans 13:

SS from meridian, hyderabad
Class : Class 5
abcd are correct

Ans 14:

Aneesh Balaji from BVBARR school, Hyderabad
Class : Class 4
c is the ans

Ans 15:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
kunal is wrong

Ans 16:

Ram Prasanna from Basil Woods International, Hyderabad
Class : Class 3
D

Post Your Answer

arnav reddy from oakridge international school, hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Havi Jain from GEMS modern academy, Gurgaon
Class : Class 8
all of these option(D)

Ans 2:

Shruti from ,
Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 3:

Kartikey Kumar Jindal from Dikshant International School, Zirakpur
Class : Class 5
Everyone thinks that a option is correct but it is wrong.The correct answer is d part.Everyone will think that chocolate is junk food.How can it give us the energy but chocolate contains fat.That's why when when we are hungry it gives us a lot of energy

Ans 4:

MAYANK from Jain Public School, REWARI
Class : Class 9
A

Ans 5:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 7
A is not correct D is correct

Ans 6:

Vineet Banode from New Horizon Scholars School, Pune
Class : Class 5

Ans 7:

Gaurika Bhasin from Genesis global school, Noida
Class : Class 2
Fruits (2) contain minerals and vitamins and are protective food. They help in recovering from illness. Overeating of fried food (1) leads to obesity as it contains fat that gets stored in the body. Chocolates (3) contain a lot of carbohydrates which give us energy when hungry.

Ans 8:

akshitha from Euroschool, Bengaluru
Class : Class 3
all of these

Ans 9:

MAYANK from Jain Public School, REWARI
Class : Class 9
D

Ans 10:

Samik Praveen from Euro School Airoli, Mumbai
Class : Class 6
All of these

Ans 11:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 7
D is correct

Ans 12:

Mahima g pillai from Arya central school, Trivandrum
Class : Class 6
D

Post Your Answer

Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

Read the given data and select the correct option for the following questions.
Raman carried out an experiment to find out how fast water can pass through four different types of soil. He put each type of soil in four pots with equal sized holes at the base and placed separate dishes at their bottom to collect water. He poured water in them one by one, and used a stopwatch to record the time taken for water to reach the level he had marked same in each dish. His recording is given in the table as shown below.

What factors should Raman keep the same to ensure a fair test?
(i) The amount of soil
(ii) The size of the pot
(iii) The shape of the dish
(iv) The amount of water

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


How can it be a fair test if the amount of water varies

Ans 1:

Shreya Sudarshan from RVK - Banashankari, Bengaluru
Class : Class 7
All the given factors are required for a fair test ; So option D would be the correct answer

Ans 2:

Adhrit from CHSV, Chennai
Class : Class 8
Definitely D

Ans 3:

Akshay Jha from DPS NERUL, Navi Mumbai
Class : Class 7
D, amount of water matters the most out of all.

Ans 4:

Riyan Nayak from DPS Newtown, Kolkat
Class : Class 7
c should be the correct answer

Ans 5:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 6:

shreya from GIIS, KualaLumpur
Class : Class 5

Ans 7:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9

Ans 8:

Aanya from DAV, Gurgaon
Class : Class 8
Option D is the correct answer

Ans 9:

Shubham Ashish Kulkarni from APEEJAY PITAMPURA, DELHI
Class : Class 8
shape of dish also should be included. Amount of water poured doesnt matter as long as you are collecting equal volume in all dishes. Hence similar dishes is important.

Ans 10:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
D

Ans 11:

Rithvik from BVM Global, Chennai
Class : Class 8
d

Ans 12:

Palash sachin patel from Kips, Patan
Class : Class 8
d is correct answer

Ans 13:

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

Ans 14:

aditya ranjan from gyan niketan , patna
Class : Class 7
i think amount of water also nedd

Ans 15:

Shriyans from DPS Agra, Agra
Class : Class 8
D

Ans 16:

Kamal Manchenella from Delhi Public School, Hyderabad
Class : Class 7
I feel that it is D

Ans 17: