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Kshitij Gupta from St Kabir din, Ahmedabad
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:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9
answer A

Ans 2:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
I will go mad with the number of wrong answers in this website.. answer should be a. For example when a spoon has to be electroplated with copper, copper is ALWAYS ON ANODE and the spoon is ALWAYS ON CATHODE. Why different logic is used here?

Ans 3:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
answer is a

Ans 4:

Dhars from DPS EAST Bangalore , Bengaluru
Class : Class 10
the answer is wrong.....it should be a

Ans 5:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
Answer is a

Ans 6:

Nishtha Neelabh from Lok Puram Public School, Thane West
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 7:

tamojit das from techno India Group Public School , Chinsura
Class : Class 8
cation(Zn2 ) must be deposited to the cathode.

Ans 8:

Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Class : Class 8
A

Ans 9:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 6
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:

Sounak halder from Kendriya Vidyalaya Cossipore, kolkata
Class : Class 8
the answer will be 'A'

Ans 11:

Chaitanya L K from SKCHEC, bangalore
Class : Class 8
Yes it is A

Ans 12:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9

Ans 13:

from Bhandari Public School, KHANDWA
Class : Class 9
The correct answer is AAAAAAA

Ans 14:

Tanush from presidency east, Bangalore
Class : Class 5
And for this question must be A

Ans 15:

Amrit Biswas from INDUSVALLEY PUBLIC SCHOOL, Noida
Class : Class 10
What is the correct answer A or C ???????

Ans 16:

Bipasana from KV IIT Kanpur, Kanpur
Class : Class 9
It has to be A.

Ans 17:

Raghav Tyagi from birla vidya niketan, new delhi
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 18:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 8

Ans 19:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 10
thus answer is a

Ans 20:

Raghav Tyagi from birla vidya niketan, new delhi
Class : Class 10
my apologies for the previous explanation answer is : C

Ans 21:

Riya Singhani from BVB vidhyashram, jaipur
Class : Class 8
WWWWRRRROOOONNNNNNNNNNGGGGGGGGGGGGGGGGG

Ans 22:

Anshuman D from MVM, Hyderabad
Class : Class 9
Yes the answer is A

Ans 23:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
it should be a

Ans 24:

Akshara from NPS, Bengaluru
Class : Class 8
Yes it should be A .

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