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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 9
the people of SOF should be wise but they are acting like dummies.. Its like they don't know that CHROMIUM IS AN EXPENSIVE METAL. IF IT WAS CHEAP WHY WOULD ITEMS NEED TO BE ELECTROPLATED!! BECAUSE OF THIS MISTAKE I LOST A MARK AND IN THE 1ST QUESTION TOO BECAUSE OF THEIR HORRIBLE MISTAKES.. I AM VERY ANGRY NOW.. I MEAN LIKE 2 MISTAKES IN 1 TEST?!?!.. REALLY?!?

Ans 2:

Class : Class 8
chromium is expensive . so answer should be B

Ans 3:

Class : Class 8

Ans 4:

Class : Class 5
Chromium is more expensive

Ans 5:

Class : Class 8
CHROMIUM IS AN EXPENSIVE METAL SO WHOLE OBJECT COULD NOT BE MADE OF IT. SO CORRECT ANSWER SHOULD BE B.

Ans 6:

Class : Class 9
It means that in place of electroplating the object with some other metal like silver ,it is cheaper to electroplate it with chromium

Ans 7:

Class : Class 9
B

Ans 8:

Class : Class 8
In the SOF book, Option B is correct. How come here Option D?

Ans 9:

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 10:

Class : Class 8

Ans 11:

Class : Class 8
Correct answer is B

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