National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 2

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 9

Which of the following statements is incorrect?
(i) The flow of electric current in the circuit is from negative to the positive terminal of the battery.
(ii) Pure water is a good conductor of electricity.
(iii) In the electroplating of copper, copper gets transferred form the anode to the cathode.
(iv) In a dry cell, the electrolyte is a paste of ammonium chloride.

A(i) and (iv) only
B(ii) and (iv) only
C(ii) and (iii) only
D(i) and (ii) only


The first one is correct as it has been proved that current flows from negative to positive making the answer (ii) only, which is not one of the options!!

Post Your Answer

Subject :NSO    Class : Class 3

Post Your Answer

Subject :NSO    Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 9

Post Your Answer

Subject :NSO    Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 6

Which of the following are possible sets of polarity when magnetising a steel bar PQ by the stroking method? (For magnets, N indicates north pole and S indicates south pole)

(i) 1 = N, 2 = S, P = N, Q = S
(ii) 1 = N, 2 = S, P = S, Q = N
(iii) 1 = S, 2 = N, P = S, Q = N
(iv) 1 = S, 2 = N, P = N, Q = S

A(i) and (ii) only
B(iii) and (iv) only
C(i) and (iii) only
D(ii) and (iv) only


Either b or d which one should i give very confusing???

Post Your Answer