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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
It should be option C. It should be discouraged.

Ans 2:

Class : Class 5
D

Ans 3:

Class : Class 5
D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
B

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Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 6
Sumit Singhal , this is a bimetallic metal . Here , the two metals cannot go away from each other . So here , if y expands than x will also expand , and if x expands than y will also expand . I am getting confusion between A and B .

Ans 3:

Class : Class 5
B is the answer

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6
b

Ans 6:

Class : Class 7
as if we will contract metal x so it is not neccessery that y will contract if we contract metal y x has to be conyracted with it ans should be a

Ans 7:

Class : Class 5

Ans 8:

Class : Class 8
B

Ans 9:

Class : Class 5
C is the correct answer

Ans 10:

Class : Class 8
The answer should be opt.B

Ans 11:

Class : Class 5
D or B? please vote

Ans 12:

Class : Class 4
B is the answer to this question

Ans 13:

Class : Class 7
All metal expands on heating. Here metal Y expands more which leads to curling of both X and Y. B is the correct option.

Ans 14:

Class : Class 5
B is the correct answer

Ans 15:

Class : Class 5
cONFUSED IN d AND B

Ans 16:

Class : Class 5
d

Ans 17:

Class : Class 5
b as Y expands more

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Subject :NSO    Class : Class 8

The diagram shows a beaker containing a solution of zinc sulphate and two carbon electrodes. A battery is placed next to it. In order that the electrode P be plated with zinc,


A P must be connected to S and Q to R
B P must be connected to Q and S to R
C P must be connected to R and Q to S
D P and Q must be connected to R.


The answer would be a as znso4 wold breakdown into zn 2and so42-ions .the zn 2 would be attracted towards cathode(negative terminal) so p would be attached to negative terminal and therefore the answer is a.

Ans 1:

Class : Class 9
Yes the answer is A

Ans 2:

Class : Class 8
answer is a

Ans 3:

Class : Class 9
answer A

Ans 4:

Class : Class 8
cation(Zn2 ) must be deposited to the cathode.

Ans 5:

Class : Class 8
Yes it is A

Ans 6:

Class : Class 10
In reactivity series hydrogen is below zinc and is less reactive than zinc. As hydrogen below zinc therefore will reduce more and earlier than zinc , hence will go to cathode and zinc will reduced or deposit at anode. therefore P will be connected to R and Q to S.hence ans is :C

Ans 7:

Class : Class 6
answer should be A, as hydrogen is not released at cathode if the other cation is Zinc or below in the electrochemical series

Ans 8:

Class : Class 9
The correct answer is AAAAAAA

Ans 9:

Class : Class 10
the answer is wrong.....it should be a

Ans 10:

Class : Class 8
Answer is a

Ans 11:

Class : Class 8
i do feel that correct answer is A.as P has to be electroplated ,it must be on cathode(-ve).so,correct is =A

Ans 12:

Class : Class 8
WWWWRRRROOOONNNNNNNNNNGGGGGGGGGGGGGGGGG

Ans 13:

Class : Class 8
the answer will be 'A'

Ans 14:

Class : Class 9

Ans 15:

Class : Class 10
thus answer is a

Ans 16:

Class : Class 5
And for this question must be A

Ans 17:

Class : Class 10
my apologies for the previous explanation answer is : C

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Subject :NSO    Class : Class 3

A note is shown here which Ravi has made about different types of house. Unfortunately when he had finished writing, some ink spilt over the page and covered some of the key words.
A wooden house made on a boat is called . It is common in Kashmir and . In areas with heavy rainfall houses are common. are built of snow and are found in very cold countries.
Select the correct sequence of hidden words to complete the note.

A Caravan, Rajasthan, Tent, Igloos
B Houseboat, Kerala, Stilt, Igloos
C Houseboat, Delhi, Kutcha, Igloos
D Tent, Karnataka, Caravan, Igloos


Ans 1:

Class : Class 3
B

Ans 2:

Class : Class 3

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
ans is c

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
Plug key is also a type of switch.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
c

Ans 2:

Class : Class 9
it needs to be sedimentation and decantation because the insoluble material present in the liquid is quite heavy you only perform filtration when the particles float over the surface of the water

Ans 3:

Class : Class 7
Yes, but in the given figure it is sedimentation

Ans 4:

Class : Class 5
Ya, filtration can also remove insoluble impurities but in this case sedimentation and decanation is more appropriate answer.

Ans 5:

Class : Class 8
sedimentation and decantation is the answer . but filtration can not come because we can see in the picture itself that the particles are big ,that's why sedimentation and decantation . if the particles are small but yet insoluble , then only it is filtration . I hope that you understood.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
every single sound has its own secondary waves, so the correct option must be option C.

Ans 2:

Class : Class 7
correct option is c

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