National Science Olympiad Forum By SOF Olympiad Trainer - Page 748
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ravi agarwal from sainik school , Bijapur
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

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

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ravi agarwal from sainik school , Bijapur
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

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

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ravi agarwal from sainik school , Bijapur
Subject :NSO    Class : Class 8

Ans 1:

yuvraj from Bhakti Vedanta Swami mission school, Mumbai
Class : Class 8

Ans 2:

Triguna from Kendriya Vidyalaya No.1 Salt Lake, Kolkata
Class : Class 8

Ans 3:

Ridhi Goyal from DAV Public School, Ludhiana
Class : Class 9
answer is part A

Ans 4:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8

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aneeshahadke@gmail.com from Euroschool Airoli, Mumbai
Subject :NSO    Class : Class 6

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AASHIA CHANDRA from MANAV RACHNA INTERNATIONAL SCHOOL, GURGAON
Subject :NSO    Class : Class 7

Ans 1:

Vedant Pungliya from ,
Class : Class 7
b

Ans 2:

Aditya kumar from Sapphire International School, Noida
Class : Class 8
the answer is "b" actually it depends upon the temperature which is present inside the room. If it is hot then transpiration rate will be faster

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Vikram from AVM, Mumbai
Subject :NSO    Class : Class 3

Study the given flow chart carefully and answer the question.
Which group lists the items that can replace R in the flow chart?



                 P                          Q                        R
AIce cube              Oxygen             Cold Drink
BOxygen                Hydrogen           Water Vapour
CCoca cola               Milk                  Vinegar
DWater Vapour       Oxygen                 Milk


How can the answer be option B? Gases do not have definite shape or volume. Therefore P cannot be oxygen and Q cannot be Hydrogen. Pls clarify

Ans 1:

Vikram from AVM, Mumbai
Class : Class 5
Thanks for the reply and for rectifying the error

Ans 2:

Jeronee from Christwood School, PERUMBAKKAM
Class : Class 5
The question is which can replace R. according to the flow chart /r doesn't have definite shape nor volume. So it should be a gas or vapour. the option B has all the items in the form of gas, oxygen, hydrogen and watervapour and is the right answer.

Ans 3:

Admin from Revisewise, Noida
Class : Class 3
The group listing items that can replace R is Option B. The marking P Q R above the options is an error which we regret and will correct as soon as possible. Thanks for bringing it to our notice.

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Ashwin Shridhar from VSA, Bengaluru
Subject :NSO    Class : Class 5

Ans 1:

SHREYAS ANDOTRA from RYAN INTERNATIONAL SCHOOL, CHANDIGARH
Class : Class 8

Ans 2:

Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi
Class : Class 7

Ans 3:

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

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kunal from Av vidya mandir school , cheeka
Subject :NSO    Class : Class 7

Ans 1:

RiptideMel from Modern Vidya Niketan Senior Secondary School Sec 17, Faridabad
Class : Class 10
I have 16 badges, but don't know what they are!

Ans 2:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 7
I have 3 badges but don't know which ones.

Ans 3:

Aniket kumar from kendriya vidyalaya, Delhi
Class : Class 8
please tell me too

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Ashwin Shridhar from VSA, Bengaluru
Subject :NSO    Class : Class 5

Ans 1:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6

Ans 2:

SHREYAS ANDOTRA from RYAN INTERNATIONAL SCHOOL, CHANDIGARH
Class : Class 8

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ABHIJEET TIKKHA from APEEJAY SCHOOL NOIDA, Noida
Subject :NSO    Class : Class 8

Pranav, a class VII student collected some China rose petals and placed in a beaker. To this he added some warm water, kept it for some time and then he used this coloured water as an indicator. He collected few samples and tested them with China rose indicator. Which of his observations was/were not correct?
      Sample                     Effect on adding China rose indicator
(i) Soap solution                Turns green
(ii) Curd                             No change
(iii) Soft drink                    Turns dark pink
(iv) Antacid tablet              Turns green

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


this question's answer according to the sofolympiad trainer website is option C. the answer given by the website is wrong, isn't it?

Ans 1:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 9
yes answer should be B

Ans 2:

lakshay gupta from DPS, New Delhi
Class : Class 9
it should be B as antacids are basic, and they will turn china rose to green

Ans 3:

Dr Anupa Ghosh from ,
Class : Class 8
The correct option is B.Because curd is acidic and the indicator should have changed to dark pink color.

Ans 4:

Mohak Khetan from Podar International School Powai , Mumbai
Class : Class 8
I think the answer which they told is wrong. The ans should be B.

Ans 5:

Siya sharma from Mayoor , Noida
Class : Class 8
B is correct antacids are basic since they are made for curing stomah acidity so it will turn the indicator to green.

Ans 6:

SUBRATA MUKHERJEE from ,
Class : Class 7
Answer should be b

Ans 7:

RiptideMel from Modern Vidya Niketan Senior Secondary School Sec 17, Faridabad
Class : Class 10
Any link with Lopamudra Raut? :-)

Ans 8:

Saanvi Puri from Venkateshwar international school, New delhi
Class : Class 8
It should be b

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