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huzaifa from kendriye vidayalaya sanghathan, New Delhi
Subject :NSO    Class : Class 8

Ans 1:

Ridhi Goyal from DAV Public School, Ludhiana
Class : Class 9
state of rest is equilibrium so answer is when resultant force is zero

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Soumik Dash from VIDYASAGAR SHISHU NIKETAN, Midnapore
Subject :NSO    Class : Class 6

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Kush Malpani from Cathedral and John Connon Senior School, Mumbai
Subject :NSO    Class : Class 6

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Dipam from Podar International School, Aurangabad
Subject :NSO    Class : Class 5

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Arin Weling from ,
Subject :NSO    Class : Class 7

Which of the following statements is false regarding physical and chemical properties?

A The composition of matter need not be changed for observing a physical change.
B During a chemical reaction, molecules undergo a change and their concentration keeps decreasing along with time.
C Chemical property is the ability of matter to undergo some chemical change because of its composition.
D During a chemical reaction, same molecules are present throughout the change.

Ans 1: (Master Answer)

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

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Arin Weling from ,
Subject :NSO    Class : Class 7

Ans 1:

aakash srivastava from st francis college lucknow, Lucknow
Class : Class 8
Sakshi's experiment was realllly interesting !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! The ans is [ C ]

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aakash srivastava from st francis college lucknow, Lucknow
Subject :NSO    Class : Class 7

Ans 1:

Arin Weling from ,
Class : Class 7
Option b

Ans 2:

Arin Weling from ,
Class : Class 7
Option b

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Atharv Jadhav from Abhinava Vidyalaya English Medium School, Pune
Subject :NSO    Class : Class 7

Ans 1:

Atharv Jadhav from Abhinava Vidyalaya English Medium School, Pune
Class : Class 7
But it could be a washing factory in which soap water is thrown out. This will make soil basic.

Ans 2:

Ananya Bansal from Saint Kabir Public School, Chandigarh
Class : Class 10
It is mentioned that the landowner has decided to use one of his fields which had 'factories' for several years. So it is considered that chemicals from these factories make the soil acidic...

Ans 3:

Hritvi from Podar International School, Mumbai
Class : Class 7
Factories in general means "manufacturing units" so we can consider that the waste water which is thrown out can be acidic in nature.

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Tanvi T from Arsha Vidya Mandir, Chennai
Subject :NSO    Class : Class 5

Ans 1:

Siddhi from Cambridge Court High School, Jaipur
Class : Class 5
OK thanks to tell my mistake especially in this question which was confusing and nice too..

Ans 2:

sai ramakrishna GUDIMETLA  from AMM MATRICULATION HIGHER SECONDARY SCHOOL, Chennai
Class : Class 5

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rashmikedia.ca from JSS PRIVATE SCHOOL, DUBAI, Dubai
Subject :NSO    Class : Class 5

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