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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:

Joahanna from SBIOA International school, CHENNAI
Class : Class 6
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:

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

Ans 2:

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

Ans 3:

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

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

Ans 1:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 6
I have 3 badges but don't know which ones.

Ans 2:

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

Ans 3:

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!

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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:

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 2:

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 3:

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

Ans 4:

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

Ans 5:

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 6:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 5
yes answer should be B

Ans 7:

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 8:

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

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

Ans 1:

arnav from the gurukul, Panchkula
Class : Class 9

Ans 2: (Master Answer)

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

Ans 3:

Arsh Sharma from Bhavan Vidyalaya, Panchkula
Class : Class 8
X can be the harmful and toxic wastes.so as they are released and again gain concentration,the quantity of aquatic animals decrease.Otherwise it was on an increase as the pollution was discharged.

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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 B.

Ans 2:

arnav from the gurukul, Panchkula
Class : Class 9

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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 B.

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Phani Kumar from Lexicon School, Pune
Subject :NSO    Class : Class 6

Ans 1:

Sunil Menon from ,
Class : Class 6
Option A.

Ans 2:

GAURAB DASH from St Mary's convent school, Baripada
Class : Class 6

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Nirali Rashesh Desai from ,
Subject :NSO    Class : Class 4

Ans 1:

ABHAY AGARWAL from ,
Class : Class 3
answer shd be k

Ans 2:

AARUSH from DPS, Mumbai
Class : Class 4
Yes it is B

Ans 3:

Aarush from Podar, Mumbai
Class : Class 7
b

Ans 4:

PRANSHU AGRAWAL from The Jain International School, Bilaspur
Class : Class 6
The answer is Bbecause A is a Maharashtrian , C is gujurati , D is bengali and B is punjabi which does not live near coastal areas

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