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VV Souri from LITTLE FLOWER SCHOOL , UPPAL HYDERABAD
Subject :NSO    Class : Class 7

A hot liquid is carefullypoured into a beaker. The graph shows how its temperature changes as it cools towards room temperature.

Which process(es) is/are taking place at region X ?

A Boiling and evaporation
B Condensation only
C Evaporation only
D Solidification and evaporation


All the latent heat of vaporization is used for condensation. So at X the T is constant

Ans 1:

Anish from Vibgyor, Pune
Class : Class 8
I think b is correct because there is no solidification

Ans 2:

kashvi from Amity, noida
Class : Class 7
Three states - gas , liquid & solid When hot water temp is going down it will be ultimate become solid ie ice But before becoming ice temp will stagnant for some time where in both states liquid & solid co-exist==> some part of liquid is in ice form. X is the same state where in solid and liquid will co-exist. Hence option 4 is correct(solidification& evaporation) Note: Could not attach gif .It would have made it more clear.

Ans 3:

pankaj srivastava from K R mangalam world school, vaishali
Class : Class 6
b is the correct answer

Ans 4:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10
Also freezing and melting point of water is 0 degrees celsius

Ans 5:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
why?

Ans 6:

Ronav Kerkar from Jamnabai Narsee School, Mumbai
Class : Class 7
either b or d

Ans 7:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
i think b is the correct answer

Ans 8:

Mohinder singh from Sacred heart convent school, Ludhiana
Class : Class 7
B is the correct answer

Ans 9:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai
Class : Class 9
i think b is correct

Ans 10:

JANYA CHANGELA from UDGAM SCHOOL FOR CHILDREN , Ahmedabad
Class : Class 8
I THINK THAT B IS ONLY THE CORRECT ANSWER

Ans 11:

Sanidhya Kapoor from Shikshantar, Gurugram
Class : Class 8
It is cooling towards room temperature so it does not solidify since the freezing point is below room temperature.

Ans 12:

Ashwak from Cambridge, Jalandhar
Class : Class 9
B should be the correct answer I think

Ans 13:

Hritvi from Podar International School, Mumbai
Class : Class 7
I think B is the correct answer because there is no solidification taking place or else the water would have turned into ice. plus no solidification can take place when water is at room temperature.

Ans 14:

arjun from the bishops school camp , pune
Class : Class 8
at 4 degree celsius water starts expanding and 'x' shows the same the room temperature might have been near or equal to the freezing point of water(eg room temperature of regions like arctic and antarctic)

Ans 15:

Hritvi from Podar International School, Mumbai
Class : Class 7
There is no proper solution for this question which will make it more confusing as everyone will have different opinions in this question.

Ans 16:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10
It cools towards room temperature so it does not freeze

Ans 17:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 18:

Debarka Das Gupta from Silchar Don Bosco School, Silchar
Class : Class 7
i think b is the correct answer

Ans 19:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10
i think there is no option correct in this ques. no evaporation and boiling is taking place as it is cooling down towards the room temperature. also no condensation is taking place as in the ques it is written a HOT liquid is being transferred to a beaker. as well as solidification may also not take place because room temp is above 0 degree centigrate. SOF PLEASE SEE TO IT THAT THIS TYPE OF WRONGG QUESTIONS AND SOLUTIONS ARE NOT POSTED.

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