semi

c ??

bt woh wrg hai

see dis..

see dis.. i got dis frm internet..

The addition of 0.001% of arsenic (impurity) donates extra 1017 free electrons in the same volume and the electrical conductivity increases about 10,000 times. "

here they are addin 0.001%.. i.e 1/1000 n d conductivity increases 10,000 times..

but in dis question we are addin i part per million i.e 1/1000000.. or 1/(1000)*(1000)

so d conductivity increases 1/1000(10,000)=10...

so ans s a)10..

[4]

ansswer lies in ur words ram

ya sure

r u sure of d ans.??/

is it c
if yes then i followed #4 [4]

wrng

i got d ans.. its a)10..

tmh aieee

no need to worry abt

1 part in a million as dopin is always done in 1ppm...

but wait i ll tell d ans.....

aisa question pehle kabhi nahin dekha..........[11][11]

whats the source???