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shreyansh2010 from Prudence, New Delhi
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

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

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Nayan Raj Dutta from DELHI PUBLIC SCHOOL, Duliajan
Subject :NSO    Class : Class 2

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Nayan Raj Dutta from DELHI PUBLIC SCHOOL, Duliajan
Subject :NSO    Class : Class 2

Ans 1:

Mridu from st pauls, bangalore
Class : Class 3
IT IS A VERY VERY WRONG QUESTION

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

Which of the following statements are incorrect?
I. Reactivity of Al decreases if it is dipped in nitric acid.
II. Carbon can reduce the oxides of Na and Mg.
III. NaCl is a good conductor of electricity in solid state.
IV. Metals like K, Ca and Mg are always found in free state in nature.

A I, II and III only
B II, III and IV only
C I and III only
D II and III only


common salt can never conduct electricity in solid state

Ans 1:

Annapurna Bulusu from AcS, Delhi
Class : Class 10
B) II,III,IV CARBON can reduce oxides of metals lower in the activity series. K, Ca and Mg are high in the activity series so they are very reactive so they can not be found in free state easily.

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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

Ans 1:

Ahmed Feroz Khan from Jankidevi Public School, Mumbai
Class : Class 5
I do not think wheat and rice contain iodine. please let me know

Ans 2:

Ahmed Feroz Khan from Jankidevi Public School, Mumbai
Class : Class 5
Potato and ghee

Ans 3:

Krithi Manasvini from Alwin Memorial Public School, Chennai
Class : Class 7
The iodine test is used to test for the presence of starch. Starch is a type of carbohydrate. Now, let’s see which of the following food products have starch, and will give positive iodine test: A. Milk and Pulses ----- Milk and Pulses are rich in proteins, so they will not give positive iodine test. B. Rice and Wheat ----- Rice and Wheat are grains, which are rich in carbohydrates. So, they will have starch and give positive iodine test. C. Banana and Coconut Oil ----- Banana is rich in carbohydrates, so it will give positive iodine test. But Coconut Oil is rich is fats, so it will not give positive iodine test. D. Potato and Ghee ----- Potato is rich in carbohydrates, so it will give positive iodine test. But Ghee is rich is fats, so it will not give positive iodine test. Hence, the correct answer is Option B, since both Rice and Wheat will give positive iodine test.

Ans 4:

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

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Agastya from NCS Arakkonam, Chennai
Subject :NSO    Class : Class 5

Ans 1:

Sarang Shete from Amanora School, Pune
Class : Class 8

Ans 2:

UMA Subramanian from Global Indian International School, Singapore
Class : Class 6

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

Ans 1:

Parth Gupta from Presidium Gurgaon, Gurgaon
Class : Class 8

Ans 2:

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

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

Ans 1:

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

Ans 2:

Pratham Dave from GNS, Bangalore
Class : Class 7
But the solution is talking about another question .

Ans 3:

Mihika Raut from ST JOSEPHS SCHOOL, RIHAND NAGAR
Class : Class 8

Ans 4:

Pratham Dave from GNS, Bangalore
Class : Class 7
Yeah The ribbon is folded so it will 10 cm [5cm x 2]

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

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