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Shivam Gupta from Army Public School, Noida
Subject :NSO    Class : Class 5

Garima performed an experiment to test the properties of four different objects and tabulated her results as follows.

Based on the above given information, which of the following best represents object W, X, Y and Z?

W X Y Z
A Iron ball Thermocol bead Glass bead Plastic ball
B Glass bead Plastic ball Iron ball Thermocol bead
C Thermocol bead Iron ball Wooden bead Glass bead
D Rubber ball Plastic ball Thermocol bead Iron ball


Ans 1:

Anjisha Chakraborty from Mount Litera Zee School, Jabalpur
Class : Class 5
Answer - option C

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Sabhya Kumar from Suncity School, Gurgaon
Subject :NSO    Class : Class 7

The steps of wastewater treatment plant are given below randomly.
(i) Wastewater is passed into sedimentation tank.
(ii) Sludge is decomposed by anaerobic bacteria.
(iii) Wastewater is passed through bar screens.
(iv) Wastewater is passed to grit and sand removal tank.
(v) Solids settle at the bottom and floatable materials are removed by skimmer.
(vi) Aeration of water takes place.
(vii) Disinfection of water by adding chlorine.
Which of the following represents correct sequence of steps?

A (iii) → (iv) → (i) → (v) → (ii) → (vi) → (vii)
B (iv) → (iii) → (i) → (v) → (ii) → (vi) → (vii)
C (iii) → (iv) → (v) → (i) → (ii) → (vi) → (vii)
D (iii) → (iv) → (i) → (ii) → (v) → (vi) → (vii)


Ans 1:

krishna tripathi from nahtfg, mjhiuhgh
Class : Class 8
A

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Ritabrata Das from OPJS, Angul
Subject :NSO    Class : Class 5

Ans 1:

munish jindal from APJ school, Jalandhar
Class : Class 8

Ans 2:

Soumya Sahoo from Pragathi central school, Hyderabad
Class : Class 6
D

Ans 3:

ADRIJA SAHA from DPS RANIPUR, Haridwar
Class : Class 6
The answer is D as X is labeled as stem but the answer is given for root.

Ans 4:

Pratham Dave from GNS, Bangalore
Class : Class 7
X is stem but the function is about the root. Hence correct option is D

Ans 5:

Shabd from Hdfc, Gurgoan
Class : Class 6
It's A as it is asking the functions not done by the stem

Ans 6:

Samarth Sabari from GIIS, Singapore
Class : Class 9
Which of the following is/are not the function(s) of the part labelled as X in the given figure ? A is answer

Ans 7:

Shreyasi Padihary from TCIS, Bangalore
Class : Class 6
The correct answer is A as it is asking the functions NOT done by X or stem.

Ans 8:

from kalyan, Kalyan
Class : Class 6
They are pointing to the stem and the answer is about roots🧐🤔

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Lokesh Sai Dasari from Rockwell International School, Hyderabad
Subject :NSO    Class : Class 5

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Ayushree Barman from Sri Sri Academy, Kolkata
Subject :NSO    Class : Class 5

Which of the following damages are associated with acid rain?
(i) Erosion of stone statues and buildings
(ii) Melting of ice caps
(iii) Increase in the number of mosquitoes
(iv) Threat to the life of aquatic beings
(v) Loss of soil fertility.

A(i), (ii) and (iii) only
B(i), (iv) and (v) only
C(i) and (iii) only
D(ii), (iii) and (v) only


In the solution, it says that the melting of ice caps is an incorrect option, but why? Acid rain is nothing but industrial chemicals that react with water vapour in the air and precipitate in form of hail, snow or rain and is acidic to nature. So in the poles, this acid can fall as snow, so they can melt the ice sheets, right? Please explain this question.

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Anushka Hazarika from DPS Megacity, Kolkata
Subject :NSO    Class : Class 6

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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Different zones of a candle flame are marked by the letters P, Q, R and S.

Which of the following statements are correct?
(i) P is the luminous zone and is the hottest part of candle flame.
(ii) In zone Q, there is inadequate supply of oxygen.
(iii) Zone R contains unburnt wax vapours produced by melting of wax.
(iv) In S zone, carbon monoxide burns with a blue flame.

A (i) and (ii) only
B (ii), (iii) and (iv) only
C (ii) and (iv) only
D (i), (ii) and (iii) only


Ans 1:

midhuna from ABCD, Hyderabad
Class : Class 8
Blue, Orange, yellow nd black zone.. pl correct me if i am wrong. How (iv) correct?

Ans 2:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
The S zone is the zone surrounding the wick, where combustion doesn't take place. Hence, statement (iv) is false and the other three are true. Therefore, the answer should be Option D.

Ans 3:

Adway Bachchan from Indian School Sohar, Sohar
Class : Class 8

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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Ans 1:

Nimish shah from Chrysalis high , Banglore
Class : Class 8
Luminouse zone doesnt contain carbon particles. NSO please fix these errors

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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Ans 1:

Neh singla from Delhi public school, Chandigarh
Class : Class 5
yes

Ans 2:

Amrit Biswas from INDUSVALLEY PUBLIC SCHOOL, Noida
Class : Class 10
it should be h2o instead of h2

Ans 3:

Jaidev Chowdhary from Shamrock International School, VIJAYAWADA
Class : Class 8

Ans 4:

Eshaan Chakraborty from The Amaatra Academy, Bengaluru
Class : Class 8

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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Ans 1:

ANIKA SHUKLA from UDGAM SCHOOL FOR CHILDREN, AHMEDABAD
Class : Class 10
Exactly.

Ans 2:

Saranyaa Adak from Delhi Public School, Durgapur
Class : Class 10
Child's play though. calorific value=heat/unit mass of the fuel burnt =180,000/4.5 =40000 kJ/kg it is a question from our very own NCERT TEXTBOOK.

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