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Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 2:

Class : Class 9
pay attention to sum of their digits

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
9.6

Ans 2:

Class : Class 9
Can u pls send the method

Ans 3:

Class : Class 10

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 10
the answer is 12 cm

Ans 2:

Class : Class 9
The answer is 12cm

Ans 3:

Class : Class 9
The answer is 12cm

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
glass rod when rubbed with fur, it gives electrons to fur and becomes positively charged

Ans 2:

Class : Class 8
positive charge is acqired

Ans 3:

Class : Class 9
When rubbed with fur, glass will become negatively charged. However if silk is used instead of fur, glass will acquire a positive charge.

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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
b

Ans 2:

Class : Class 5
b as Y expands more

Ans 3:

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 4:

Class : Class 5
B is the correct answer

Ans 5:

Class : Class 5

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 6

Ans 8:

Class : Class 5
cONFUSED IN d AND B

Ans 9:

Class : Class 5
D or B? please vote

Ans 10:

Class : Class 5
C is the correct answer

Ans 11:

Class : Class 8
B

Ans 12:

Class : Class 8
The answer should be opt.B

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 4
B is the answer to this question

Ans 15:

Class : Class 5

Ans 16:

Class : Class 5
B is the answer

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

Ans 2:

Class : Class 9
And for this question must be A

Ans 3:

Class : Class 9
The correct answer is AAAAAAA

Ans 4:

Class : Class 10
thus answer is a

Ans 5:

Class : Class 8
the answer will be 'A'

Ans 6:

Class : Class 8
Answer is a

Ans 7:

Class : Class 8
WWWWRRRROOOONNNNNNNNNNGGGGGGGGGGGGGGGGG

Ans 8:

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

Ans 9:

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

Ans 10:

Class : Class 9

Ans 11:

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 12:

Class : Class 8
answer is a

Ans 13:

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 14:

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 15:

Class : Class 8
Yes the answer is A

Ans 16:

Class : Class 8
Yes it is A

Ans 17:

Class : Class 9
answer A

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