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devarchan Sarkar from Aditya Birla Public School, Bharuch
Subject :NSO    Class : Class 6

Ans 1:

Anish Bharadwaj from Delhi public school , Singapore
Class : Class 8
Ans is D

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devarchan Sarkar from Aditya Birla Public School, Bharuch
Subject :NSO    Class : Class 6

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Bhanusree ANNE from calorx public school, MUNDRA, KUTCH
Class : Class 6
potato and ghee

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Agastya from NCS Mumbai, Mumbai
Subject :NSO    Class : Class 5

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devarchan Sarkar from Aditya Birla Public School, Bharuch
Subject :NSO    Class : Class 6

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devarchan Sarkar from Aditya Birla Public School, Bharuch
Class : Class 7

Ans 2:

Parth Gupta from Presidium Gurgaon, Gurgaon
Class : Class 6

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devarchan Sarkar from Aditya Birla Public School, Bharuch
Subject :NSO    Class : Class 6

Ans 1:

MIHIKA RAUT from ST JOSEPHS SCHOOL, RIHAND NAGAR
Class : Class 7

Ans 2:

PRANEEL PRIYASH PANDA from AECS NARORA, BULANDSHAHR
Class : Class 6
It will ten centimetres because the length of this is 5 cm [7-2] .

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devarchan Sarkar from Aditya Birla Public School, Bharuch
Subject :NSO    Class : Class 6

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arpit12345 from Ryan International School, New Delhi
Subject :NSO    Class : Class 10

Observe the given experimental set-up carefully.
image
Which of the following could be the possible observation and inference drawn?

A The solution becomes blue-green due to formation of copper oxide, P is acidic.
B The solution becomes blue-green due to formation of copper chloride, P is basic.
C The solution becomes white due to formation of calcium hydroxide, P is basic.
D The solution becomes white due to formation of calcium oxide, P is acidic.


the correct answer should be (b) because copper cant displace h2 from HCl

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Yes, the correct answer is B.

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Sarthak Gupta from DPS, Haryana
Subject :NSO    Class : Class 4

Ans 1:

Malavya Chaturvedi from Study Hall, Lucknow
Class : Class 4
Answer is C

Ans 2:

Saarth Agrawal from Podar International School , Mumbai
Class : Class 5
c

Ans 3:

PRAGWANSH JENA from DELHI PUBLIC SCHOOL, Raipur
Class : Class 4

Ans 4:

Bharghavi V from Vedavalli vidyalaya senior secondary school , Walajapet
Class : Class 4
C auto motor other we should ride

Ans 5:

SHAH HITANSH JINESH from S H KHARAWALA, AHMEDABAD
Class : Class 6
The Answer is C. NOW THE QUESTION IS HOW? THE ANSWER IS THE MACHINES SHOWN IN PICTURE A,B,D RUNS BY MUSCULAR . FORCE. THE OPTION C RUNS BY MOTOR.

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arpit12345 from Ryan International School, New Delhi
Subject :NSO    Class : Class 10

Four students P, Q, R and S noted the initial colour of the solutions kept in beakers I, II, III and IV. After inserting zinc rods in each solution and leaving them undisturbed for two hours, the colour of each solution was again noted in the form of table given below :

image
Which student noted the colour change in all the four beakers correctly?

A P
B Q
C R
D S


the correct answer is not given because acc. to reactivity series only beaker 1 will have some change

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Anirudh Thakkar from Mata gujri public school, Chak suhele wala
Subject :NSO    Class : Class 3

Ans 1:

Anirudh Thakkar from Mata gujri public school, Chak suhele wala
Class : Class 3
how?

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