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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:

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.

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:

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.

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

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Karthik G from Bhavans Vidya Mandir, Elamakkara, Ernakulam
Subject :NSO    Class : Class 9

Ans 1:

abel Viji George from K.M.B.V.M, Pottore, Thrissur
Class : Class 9

Ans 2:

Rakesh Kumar from GURU GOBIND SINGH PUBLIC SCHOOL, Bokaro
Class : Class 9
D

Ans 3:

Aravinda Venkatesan from Gd Goenka school indrapuram, Ghaziabad
Class : Class 9

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Nihariekha Prashanth from Manthan Vidhyashram, Chennai
Subject :NSO    Class : Class 6

Fill in the blanks.
The solubility of sugar in water ___(P)___ with an/a ___(Q)___ in ___(R)___ . However, The solubility of salt ___(S)___ very little with temperature.

            P                      Q                      R                      S
A Decreases       Increase       Temperature       Increases
B Increases        Increase        Temperature        Increases
CIncreases         Decrease       Pressure              Decreases
D Decreases      Increase         Pressure              Decreases


i cant understand it at all

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Shreyas Gupta from CHIREC International, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

atharv vedant from Swami Vivekanand International School, Mumbai
Class : Class 6
B. BECAUSE OF MORE VEHICLES THERE IS MORE POLLUTION AND ELECTRIC APPLIANCES CAN DO THE SAME.

Ans 2:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 8
Nilesh even I ticked the answer B but the site says answer A.

Ans 3:

Aadit Bhagade from Delhi Public School Kalali, Vadodara
Class : Class 7
Answer should be B. Their answer A should be incorrect.

Ans 4:

DIPANJAN BHATTACHARYA from Lotus valley international school , noida
Class : Class 6
sorry! just forgot!

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