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Rikhil Gupta from Christ Academy, Bengaluru
Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

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nageshrc228 from yuvabharathi international school, Singapore
Subject :NSO    Class : Class 4

Ans 1:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 4
B) West

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sheetal Gupta from ,
Subject :NSO    Class : Class 5

Ans 1:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 6

Ans 2:

HIMANISH BASU from APS BANGALORE , Bangalore
Class : Class 5

Ans 3:

Yash Tulshyan from Sterling school, New Mumbai
Class : Class 5

Ans 4:

Khushie from Gdgps gurugram, Gurgaon
Class : Class 5
C is correct

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sheetal Gupta from ,
Subject :NSO    Class : Class 5

Ans 1:

SHAURYA SINHA from GREEN FIELDS SCHOOL , NEW DELHI
Class : Class 5
Ans- C

Ans 2:

Khushie from Gdgps gurugram, Gurgaon
Class : Class 5
C

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Aneesh Rajput from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA
Subject :NSO    Class : Class 4

Ans 1:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 4
B) Y-Cabbage as vegetable, X-Cotton as fibre producer

Ans 2:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 4

Ans 3:

Alex from BGS National Public School , Bangalore
Class : Class 4

Ans 4:

DEVANG Gupta from B K birla school kalyan, Kalyan
Class : Class 4

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Ankush Ghosh from DPS, Doha
Subject :NSO    Class : Class 5

Ans 1:

Karan Chavan from GIIS,Chinchwad, Pune
Class : Class 5
b

Ans 2:

Karan Chavan from GIIS,Chinchwad, Pune
Class : Class 5
b

Ans 3:

SHREYAS ANANDHAN from Phoenix Greens International School, Hyderabad
Class : Class 6
b

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Anmol kathar from deogiri global academy, aurangabad
Subject :NSO    Class : Class 6

The different steps of vermicomposting are given below randomly.
(i) Spread sand on the floor of the pit
(ii) Place red worms in the pit
(iii) Cover with a grass
(iv) Sprinkle water to keep it moist
(v) Dig a pit in a suitable place
(vi) Add vegetable peels and fruit waste in the pit
Which of the following represents the correct sequence of steps?

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


Ans 1:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 6
in a much better way First we have to dig the ground. (v) Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i) Then we can add the waste we planed to throw in the pit. (vi) We have to then cover with grass so that the pit remains closed. (iii) Moisture is required for wastes to decompose. (iv) We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess. (ii)

Ans 2:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 6
First we have to dig the ground. (v) Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i) Then we can add the waste we planed to throw in the pit. (vi) We have to then cover with grass so that the pit remains closed. (iii) Moisture is required for wastes to decompose. (iv) We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess

Ans 3:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 6
in a much better way First we have to dig the ground. (v)| Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i)| Then we can add the waste we planed to throw in the pit. (vi) | We have to then cover with grass so that the pit remains closed. (iii) | Moisture is required for wastes to decompose. (iv) | We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess. (ii)|

Ans 4:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
option B

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Aparna praveen from Rajagiri, Ernakulam
Subject :NSO    Class : Class 4

Ravi set up an experiment as shown in the given figure.The figure shows five identical balls being suspended on a rod by strings of different lengths. Ravi then cut all five strings at the same time and the balls were allowed to fall freely to the ground.

Which of these statements holds true for this experiment?

ABall ‘b’ had the greatest impact on the ground.
BBall ‘a’ had less gravitational potential energy than ball ‘c’ at the start.
CBall ‘d’ had the most gravitational potential energy at the start.
DBalls ‘a’ and ‘e’ had different amounts of gravitational potential energy at the start due to their different positions along the rod.

Ans 1:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 4
A) Ball ‘b’ had the greatest impact on the ground.

Ans 2:

Abhineet Nandy from DPS Whitefield, Bangalore
Class : Class 4
The answer is [A]

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Anmol kathar from deogiri global academy, aurangabad
Subject :NSO    Class : Class 6

Which of the following statements are true about acid rain ?
(i) Acid rain has harmful effects on the living beings.
(ii) Acid rain mainly comprises of H2SO4 and HNO3.
(iii) Greenhouse gases are mainly responsible for causing acid rain.
(iv) Acid rain causes damage to buildings.

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


but here option C is also true ,so there have the option as 'all of these'.

Ans 1:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
all are correct

Ans 2:

ttraj from KV IIT, Chennai, Chennai
Class : Class 3
D

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Shlok from Tomoae , Amravati
Subject :NSO    Class : Class 7

Kirti kept a metal spoon in a glass jar filled with pickle for a few days. She observed that there were holes in the spoon. What could be the possible reason for this?

A Oil present in pickle dissolves the metal.
B Oil present in pickle liberates a gas in which metal gets dissolved.
C Metal reacts with acid present in pickle to form salt hence, metal gets dissolved.
D The glass reacts with metal to give acid which dissolves the metal.


i didnt get this . answer says acid reacts with metal to form salt but acid reacts with metal to form hydrogen can you help me ?

Ans 1:

Kartik Saxena from Mercy Memorial School, Kanpur
Class : Class 7
C Metal reacts with acids

Ans 2:

Shriyam from Chinmaya vidyalaya Bokaro, Bokaro
Class : Class 7
Answer is C as metal react with acid to form salt and hydrogen both

Ans 3:

R k sanjith from New Horizon gurukul , Bangalore
Class : Class 7

Ans 4:

Kartik Saxena from Mercy Memorial School, Kanpur
Class : Class 7
C Metal reacts with acids

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