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

Ans 1:

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

Ans 2:

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 3:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 8
why?

Ans 4:

JANYA CHANGELA from UDGAM SCHOOL FOR CHILDREN , Ahmedabad
Class : Class 7
I THINK THAT B IS ONLY THE CORRECT ANSWER

Ans 5:

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

Ans 6:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 8
It cools towards room temperature so it does not freeze

Ans 7:

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 8:

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

Ans 9:

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 10:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 8
Also freezing and melting point of water is 0 degrees celsius

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:

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

Ans 13:

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

Ans 14:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai
Class : Class 8
i think b is correct

Ans 15:

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

Ans 16:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
B should be the correct answer I think

Ans 17:

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.

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AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Subject :NSO    Class : Class 3

Ans 1:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 2:

kalra Shaleen from Jalandhar, Jalandhar
Class : Class 5
b

Ans 3:

suhas from vibgyor, bangalore
Class : Class 4
The answer is gibbous moon.

Ans 4:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 5

Ans 5:

nirvi pal from jasudben ML School, mumbai
Class : Class 3
okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

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Swarnava Pal from Vivekananda Mission School, Haldia
Subject :NSO    Class : Class 4

Ans 1:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
A

Ans 2:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
a

Ans 3:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 5
a is right

Ans 4:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
A

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

Both plants ‘c’ and ‘d’ bear fruits. This means they are flowering plants as only flowers change into fruits. Plant ‘c’ grows in water i.e., it is an aquatic plant but plant ‘d’ does not grow in water thus, it is a nonaquatic plant. Hence 'W' and 'X' represent plant ‘c’ and ‘d’ respectively.


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Dhruvan G from Indian School al Ghubra, Muscat
Subject :NSO    Class : Class 8

There are two different solutions in set up P and Q as shown in figure. The bulb in the set up P glows more brightly as compared to that of the set up Q. What are the possible causes for this?

(i) The connections of the circuit Q may be loose.
(ii) The liquid in Q may have small conductivity.
(iii) Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.

A Only (i) and (ii)
B Only (ii) and (iii)
C Only (i)
D Only (ii)


I don't understand (iii)

Ans 1:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
It’s not mentioned about tightness of the circuits.

Ans 2:

Ankit kumar Jha from Ryan International School , Ghaziabad
Class : Class 9
but how do we know that the circuit is conneced tightly???

Ans 3:

Student from School, City
Class : Class 8
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 4:

Student from School, City
Class : Class 8
How can a liquid be equal to a battery and another liquid be equal to *its* cell?

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B

In given figures, both the circuits are tightly connected and both the liquids conduct electricity because both the bulbs are glowing. The bulb in the set up P glows more brightly as compared to that of the set up Q might be because of any of the two possibilities:

1. The liquid in Q may have small conductivity. 

2.  Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P. 


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Prakrit Kumar from Ryan international school, Maharashtra
Subject :NSO    Class : Class 4
Hi

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Plaese mention your query


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Shiven Dinkar from DPS NOIDA Sector 30, Delhi
Subject :NSO    Class : Class 3

Ans 1:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 3
Drying is the answer !

Ans 2:

Shiven Dinkar from DPS NOIDA Sector 30, Delhi
Class : Class 4
aayman please can you come online

Ans 3:

Aayman Aamir from DPS NOIDA, Noida
Class : Class 3
Drying is the answer From aayman

Ans 4:

Havi Jain from GEMS modern academy, Gurgaon
Class : Class 3
the answer of this question is drawing because when we dry something moisture is removed from it.

Ans 5:

Aayman from DPS NOIDA, Noida
Class : Class 4
Well shiven

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Dhruvan G from Indian School al Ghubra, Muscat
Subject :NSO    Class : Class 8

To every action there is always an equal and opposite reaction. Which of the following statements is correct regarding this?

A The buggy pulls the horse backward just as hard as the horse pulls the buggy forward. Both of them would not move forward if surface is frictionless.
B The horse pulls the buggy forward slightly harder than the buggy pulls the horse backward, so they move forward.
C The horse can pull the buggy forward only if the horse weighs more than the buggy.
D None of these


Does anybody know the solution?

Ans 1:

Rishit from Allen, Bangalore
Class : Class 8
it is one

Ans 2:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8

Ans 3:

TARUN from DAV, DHANBAD
Class : Class 8
Ans.- (A) The buggy pulls the horse as backward just as hard the horse pulls the buggy forward. According to the IIIrd law of NLM( Newton's Laws of Motion), the action and reaction force takes place in two different bodies, in different direction , but of the same magnitude.

Ans 4:

ishaan parikh from ahmedabad international school, ahmedabad
Class : Class 8

Ans 5:

ishaan parikh from ahmedabad international school, ahmedabad
Class : Class 8
Answer A will be correct if you take newtons third law of motion into consideration

Ans 6: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

The buggy pulls the horse backward just as hard as the horse pulls the buggy forward. Both of them would not move forward if surface is frictionless. 


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Anshuman Mishra from kv no 3, Bhubaneswar
Subject :NSO    Class : Class 6

Ans 1:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.

Ans 2:

Naman from Svm, Nalasopara
Class : Class 6

Ans 3:

Neel bhalsod from Navrachana school sama, Vadodara
Class : Class 6
B

Ans 4:

Naman from Svm, Nalasopara
Class : Class 6

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B.

In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.


Ans 6:

from DELHI PUBLIC SCHOOL ,
Class : Class 6

Ans 7:

PS Gour from Chirec international schoo The best 30 years and beyond, Hyderabad
Class : Class 8
EASY PEASY LEMON SQUEEZY!

Ans 8:

Ishir Jha from Keshav Saraswati Vidya Mandir, Patna
Class : Class 7

Ans 9:

Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Class : Class 6
In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.

Ans 10:

Nishka Rawat from Inventure Academy, Bengaluru
Class : Class 4
What about vitamin A which is also fat soluble and also stored in fat tissues. The answer should be 'D' because the group Y consists of both vitamin A and vitamin E

Ans 11:

Nishka Rawat from Inventure Academy, Bengaluru
Class : Class 4
What about vitamin A which is also fat soluble and also stored in

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Rudra Tripathi from DPS ASANSOL, Asansol Burdwan
Subject :NSO    Class : Class 4

Ans 1:

Rishan Sandeep Gadhia from Orchids International, Mumbai
Class : Class 4
very intelligent question , and answers too

Ans 2:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
d

Ans 3:

Aajani Datta from The Samhita Academy, Bangalore
Class : Class 5

Ans 4:

Dristri from Carmel, Jorhat
Class : Class 4

Ans 5:

Harini from vibgyor high, bangalore
Class : Class 3
D

Ans 6:

Saarang roy from Indian school ghubra, Muscat
Class : Class 5

Ans 7:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
D

Ans 8:

Alisha from Delhi Public School kolar road, Bhopal
Class : Class 4
Explain how and why D?

Ans 9:

Bk Tiwari from S.D.A, Surat
Class : Class 2
why d please explain

Ans 10:

Dristri from Carmel, Jorhat
Class : Class 4

Ans 11: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is D.

X is oesophagus with no change in amount of undigested food. Y is stomach and Z is small intestine with decreasing amount of undigested food and P is large intestine as no further digestion occurs here.


Ans 12:

Hansikaa from JaiGopal Garodia Rashtrothana Vidya Kendra, Bangalore
Class : Class 4

Ans 13:

NARAYANAN VENKITASUBRAMANI from THE PSBB MILLENNIUM SCHOOL, Coimbatore
Class : Class 4

Ans 14:

Rithvik from BVM Global, Chennai
Class : Class 5

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Sriram from DPS Modern Indian school , Doha
Subject :NSO    Class : Class 9

A unicellular protist X, which has contractile vacuole to remove excess intracellular water, was placed in salt solution of increasing osmolarity. The given graph shows the rate of contraction of vacuole to pump out excess water against osmolarity of solution.
Select the option that gives the correct explanation of the data.


A In an isotonic solution there is no diffusion of water in or out of the X, so the contraction rate is zero.
B At higher osmolarity, more salt diffuses into X, therefore lower rates of contractions are required.
C The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases.
D The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP.


what s the answer

Ans 1:

shreya from bbps noida, Noida
Class : Class 9
what is osmolarity

Ans 2:

aditya apurva from DAV public School, Duttnagar
Class : Class 9
the concentration of a solution expressed as the total number of solute particles per litre.

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The answer is C

The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases. 


Ans 4:

from dpsgv, ghaziabad
Class : Class 9
amount of water entering the cell is osmolarity

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