User Forum

Subject :NSO    Class : Class 8

The bumpers and door handles of motor cars, taps etc. are coated with silvery layer of chromium because
(i) It does not easily get corroded.
(ii) It forms a hard layer which does not easily get scratched.
(iii) It tarnishes quickly.
(iv) It is cheap.

Which of the following options is correctly identifies true (T) or false (F)?

(i) (ii) (iii) (iv)
A F F T T
B T T F F
C F T F T
D T T F T


it is wrongshould be b

Ans 1:

Class : Class 8
chromium is not cheapif it is cheap then the whole material can be made of chromium, why do they electroplate it if its cheapoption D is wrong and option B is correct

Ans 2:

Class : Class 8
It means that in place of electroplating the object with some other metal like silver ,it is cheaper to electroplate it with chromium

Ans 3:

Class : Class 5
chromium is expensive . so answer should be B

Ans 4:

Class : Class 5

Post Your Answer