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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:

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 2:

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

Ans 3:

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

Ans 4:

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 5:

munish jindal from APJ school, Jalandhar
Class : Class 8

Ans 6:

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

Ans 7:

Shreyasi Padihary from TCIS, Bangalore
Class : Class 5
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:

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:

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

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:

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

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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 9
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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arnav from the gurukul, Panchkula
Subject :NSO    Class : Class 8

Ans 1:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 2:

Saranyaa Adak from Delhi Public School, Durgapur
Class : Class 10
Sulfur dioxide and chlorine are not produced because CNG is composed of methane. The fact that it produces large amount of carbon dioxide is not helpful or advantageous by any means. Whether it is used in compressed form or not does not make it eco-friendly; but, yes, it produces no smoke SPM upon combustion. So correct answer is (B).

Ans 3:

Student from School, City
Class : Class 5
What is "Apache tomcat error"? I wrote a long answer and it vanished.

Ans 4:

ARNAB MANDAL from NAVY CHILDREN SCHOOL, VIZAG
Class : Class 9
totally wrong

Ans 5:

Nimish shah from Chrysalis high , Banglore
Class : Class 8

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