Subject :NSO Class : Class 8
Class : Class 8
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
Subject :NSO Class : Class 3
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 5
Ans 1:
Class : Class 6
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 2:
Class : Class 5
Ya, filtration can also remove insoluble impurities but in this case sedimentation and decanation is more appropriate answer.
Ans 4:
Class : Class 7
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
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 8
Ans 2:
Class : Class 8
Hi, the statement 2 is true but just tells about the type type combustion to which the reaction given in statement belong. it does not tell about actual cause of burning of phosphorus in air at room temperature. the reason for statement 1 is that phosphorus is a highly reactive element that's why burns in air at room temperature.
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 6
Ans 3:
Class : Class 6
they MUST and SHOULD be more CAREFUL. No options??? Then, how should we answer their question??? they take no actions! look:-a person has commented a year ago but?NO RESPONSE
Ans 6:
Class : Class 7
they didn't given on question page so all my friends and I missed that question
Ans 7:
Class : Class 7
They did not give the options on my iPad so I couldn't see which was the correct ans. something needs to be done about this problem.
Ans 8:
Class : Class 6
They did not give options so that is why it went wrong. these kind of incidents happen very frequently in SOF
Ans 13:
Class : Class 6
The shadow will be whole black as the book is an opaque object and will not allow any light to pass through it so on the screen it will form a shadow. And the rest that is the ring, no light will reach it thus how can its shadow be formed?
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Subject :NSO Class : Class 4