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Subject :NSO    Class : Class 8

Two electroscope one positively charged (X) and the other negatively charged (Y) are connected with a copper wire as shown in figure. Which of the following will happen?


A Electrons will move from X to Y.
B Protons will move from X to Y.
C Electrons will move from Y to X.
D Protons will move from Y to X.


pls somebody tell me the answersplease,please,pppppppppllllllllllleeeeeeeeeeeeaaaaaaaaaaassssssssssssseeeeeeeee

Ans 1:

Class : Class 5
Why

Ans 2: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
D

Ans 2:

Class : Class 5
D

Ans 3:

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

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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 6

Ans 2:

Class : Class 4
ans should be D as if metal x contracts and metal y expands then the 2 metals will bend inward an as an ellusion we see that y is longer than x

Ans 3:

Class : Class 5
b as Y expands more

Ans 4:

Class : Class 8
The answer should be opt.B

Ans 5:

Class : Class 6
b

Ans 6:

Class : Class 5

Ans 7:

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 8:

Class : Class 5
B is the correct answer

Ans 9:

Class : Class 5

Ans 10:

Class : Class 5
D or B? please vote

Ans 11:

Class : Class 6
d

Ans 12:

Class : Class 7
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 13:

Class : Class 8
B

Ans 14:

Class : Class 5

Ans 15:

Class : Class 5
B because if Y expands and X contracts, X will be a lot smaller than Y. Here, both are almost the same size.

Ans 16:

Class : Class 6
B is the answer

Ans 17:

Class : Class 4
sof does not reply that is why we are confused

Ans 18:

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 19:

Class : Class 5
B is the right answer

Ans 20:

Class : Class 5
C is the correct answer

Ans 21:

Class : Class 4
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Ans 22:

Class : Class 4

Ans 23:

Class : Class 6
B is the answer to this question

Ans 24:

Class : Class 4
iron-nickel alloy notable for its lack of expansion or contraction with temperature changes. hence all metals do NOT expand

Ans 25:

Class : Class 5
cONFUSED IN d AND B

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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 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 2:

Class : Class 8
Yes it is A

Ans 3:

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 4:

Class : Class 8
it should be a

Ans 5:

Class : Class 8
WWWWRRRROOOONNNNNNNNNNGGGGGGGGGGGGGGGGG

Ans 6:

Class : Class 8
Yes it should be A .

Ans 7:

Class : Class 9
The correct answer is AAAAAAA

Ans 8:

Class : Class 9

Ans 9:

Class : Class 8
answer is a

Ans 10:

Class : Class 9
It has to be A.

Ans 11:

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

Ans 12:

Class : Class 9
Yes the answer is A

Ans 13:

Class : Class 9
answer A

Ans 14:

Class : Class 8
the answer will be 'A'

Ans 15:

Class : Class 8
Answer is a

Ans 16:

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

Ans 17:

Class : Class 5
And for this question must be A

Ans 18:

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 19:

Class : Class 10
thus answer is a

Ans 20:

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

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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 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.

Ans 3:

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 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
Yes, but in the given figure it is sedimentation

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