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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
glass rod when rubbed with fur, it gives electrons to fur and becomes positively charged

Ans 2:

Class : Class 4

Ans 3:

Class : Class 8
positive charge is acqired

Ans 4:

Class : Class 6

Ans 5:

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

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 4
sof does not reply that is why we are confused

Ans 2:

Class : Class 4
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Ans 3:

Class : Class 5
d

Ans 4:

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 5:

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

Ans 6:

Class : Class 5
cONFUSED IN d AND B

Ans 7:

Class : Class 5

Ans 8:

Class : Class 5
b as Y expands more

Ans 9:

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 10:

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 11:

Class : Class 8
The answer should be opt.B

Ans 12:

Class : Class 5
D or B? please vote

Ans 13:

Class : Class 6
b

Ans 14:

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 15:

Class : Class 8
B

Ans 16:

Class : Class 5
B is the answer

Ans 17:

Class : Class 5
C is the correct answer

Ans 18:

Class : Class 6

Ans 19:

Class : Class 5

Ans 20:

Class : Class 5

Ans 21:

Class : Class 6
B is the answer to this question

Ans 22:

Class : Class 5
B is the correct answer

Ans 23:

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

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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
WWWWRRRROOOONNNNNNNNNNGGGGGGGGGGGGGGGGG

Ans 2:

Class : Class 8
It has to be A.

Ans 3:

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

Ans 4:

Class : Class 8
Yes it is A

Ans 5:

Class : Class 8
the answer will be 'A'

Ans 6:

Class : Class 10
thus answer is a

Ans 7:

Class : Class 9
The correct answer is AAAAAAA

Ans 8:

Class : Class 5
And for this question must be A

Ans 9:

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 10:

Class : Class 9
answer A

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 10
my apologies for the previous explanation answer is : C

Ans 13:

Class : Class 9
Yes the answer is A

Ans 14:

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 15:

Class : Class 8
Answer is a

Ans 16:

Class : Class 8
answer is a

Ans 17:

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

Ans 18:

Class : Class 9

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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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