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Dev Rawat from R D Rajpal School, New Delhi
Subject :NSO    Class : Class 7

Study the given Venn diagram carefully.


Identify 1, 2 and 3.

1 2 3
A Do not React with metals react with litmus Do not react with carbonates
B Are sour in taste React with carbonates Are soapy to touch
C Have OH– > H+ Have H+ OH– = H+ Have OH– H+ > OH–
D React with carbonates to form CO2 gas can be identified by using indicators turn china rose indicator green


Ans 1:

Arnav Ranka from Gyan Bharati School, Saket, New Delhi
Class : Class 9
3 and 2 should be interchanged.

Ans 2:

Mehaan Bhatt from Pawar Public School , Mumbai
Class : Class 6
I mean D

Ans 3:

Devavrat Sharma from Podar International School Powai, Mumbai
Class : Class 7
Answer is B as neutral solutions cannot be identified

Ans 4:

Shubham Ashish Kulkarni from APEEJAY PITAMPURA, DELHI
Class : Class 8
Venn diagram shows proportion of acid and base to be equal for 3 i.e. salt then how can you say china rose indicator will turn green i.e. salt is basic in nature, i.e. 3rd part of option D which is correct as per admin. Please clarify..

Ans 5:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7
Actually venn diagram shows the propertied of the substances, not the substances themselves. So, it should be D. Admin is right.

Ans 6:

sankalp from Gyan Bharti School, Saket, Delhi
Class : Class 9
3 and 2 should be interchanged, Sir

Ans 7:

Samriddha from St Paul's academy, Kolkata
Class : Class 7
3 and 2 should be interchanged

Ans 8:

Dhriti Das from K.R. Mangalam World School, Faridabad
Class : Class 5

Ans 9: (Master Answer)

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

Ans 10:

Mehaan Bhatt from Pawar Public School , Mumbai
Class : Class 6
3 cannot be the answer

Ans 11:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7

Ans 12:

Tviesha Dayalani from Bhavans' Rajaji Vidyashram, chennai
Class : Class 8

Ans 13:

Upanshu Nayak from ITL PUBLIC School, New Delhi
Class : Class 7
Kindly Explain your answer Admin.

Ans 14:

Samadrita Ghosh from BDMI, Kolkata
Class : Class 8

Ans 15:

PRISHA WAGH from G D SOMANI MEMORIAL SCHOOL, MUMBAI
Class : Class 7
3 and 2 shud be interchanged

Ans 16:

Tviesha Dayalani from Bhavans' Rajaji Vidyashram, chennai
Class : Class 8

Ans 17:

Ujas Singh from Rajiv International School, Mathura
Class : Class 7

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