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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:

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

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:

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

Ans 4:

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

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Arush from Anandi Public School, Udgir
Subject :NSO    Class : Class 7

Ans 1:

Dhruvan G from Indian School Al Ghubra, Muscat
Class : Class 8
It started in '1973', NOT in '1927' you have got your reference wrong. The question says 1974 which is a year wrong so I think they made a mistake while preparing the questions.

Ans 2:

Arush from Anandi Public School, Udgir
Class : Class 3
richa is also wrong as chipko movement started in 1927

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Arush from Anandi Public School, Udgir
Subject :NSO    Class : Class 7

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Sreejith from kingswood, basildon
Subject :NSO    Class : Class 3

Ans 1:

aarav m from kumarans, bengaluru
Class : Class 3
A

Ans 2:

Iniya from DPS Singapore, Singapore
Class : Class 3

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soham bansal from st.anslem school, alwar
Subject :NSO    Class : Class 10

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krish kasturirangan from P G Garodia , Ghatkopar
Subject :NSO    Class : Class 4

Ans 1:

SOUMYARAJ ROY from DELHI PUBLIC SCHOOL, Dhanbad
Class : Class 5

Ans 2:

ikshika kumar from MVN SCHOOL, FARIDABAD
Class : Class 4
A) Colder, Warmer

Ans 3:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 5

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UTKARSH SINGHAL from DPS ALIGARH, ALIGARH
Subject :NSO    Class : Class 7

Ans 1:

Ayushman Mohapatra from DAV PUBLIC SCHOOL, Bhubaneswar
Class : Class 7
A

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SATYA SHRIVASTAVA from DOON PUBLIC SHOOL, JHARSUGUDA
Subject :NSO    Class : Class 3

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

Small populations of three types of organisms X, Y and Z were kept in captivity. Plenty of plants were present in that area.
The change in the population of these organisms with time was plotted in the graph as shown here.

Which of the following conclusion is incorrect regarding their eating habits?

A X could be a carnivore that feeds on Z but not on Y.
B Both X and Y could be herbivores and Z could be a carnivore whose population declines as it does not prey on both X and Y.
C If X and Y are herbivores, then X has higher reproductive potential than Y.
D None of these


Ans 1:

Parth Gupta from Presidium Gurgaon, Gurgaon
Class : Class 1
How is the answer D??????????????????????????

Ans 2:

Neelesh Dutta from Innocent Hearts School, JALANDHAR
Class : Class 6
Not at all

Ans 3:

Sabyasachi Choudhury from Indian School Oman, Muscat
Class : Class 6
please provide the solution

Ans 4:

Ayush sharma from GEMS international school , Gurgaon
Class : Class 7
please provide solution for the question

Ans 5:

SARTHAK from RPS, Mahendergarh
Class : Class 6
Please give solution of this question.............

Ans 6:

Agustya vaid from Somerville school vasundhara enclave, Delhi
Class : Class 6
how is the answer D???????????

Ans 7:

Ishithaa from BPS, CLAPPANA
Class : Class 6
how is it D ??????????????????????????

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ishi gupta from dps secto 30, Noida
Subject :NSO    Class : Class 3

Ans 1:

Rumi from Greenwood High, Bengaluru
Class : Class 3
Its A

Ans 2:

anishkulkarni from The Stepping Stone School, Pune
Class : Class 4
IT IS C

Ans 3:

ALICE from CENTRAL ACADEMY, UDAIPUR
Class : Class 1
the correct answer is A.

Ans 4:

Devansh from mmvm, Udaipur
Class : Class 4

Ans 5:

Midhuna from ABCD, Banglore
Class : Class 3
Yes... answer is both A

Ans 6:

Neelesh Dutta from Innocent Hearts School, JALANDHAR
Class : Class 6
Answer can be both A and D

Ans 7:

ishi gupta from dps secto 30, Noida
Class : Class 3
how

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