Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for
Sb2S3 sol is
(A) Na2SO4 (B) CaCl2
(C) Al2(SO4)3 (D) NH4Cl

Two trains, traveling towards each other, left from two stations that are 900 miles apart, at 4 pm. If the rate of the first train is 72 mph and the rate of the second train is 78 mph, at wthat time w

200meter train travel with the speed of 120kmph and other train travel in opposite direction with speed of 80kmph in 9 seconds. Then find the length of other train ?

1)240
2)300
3)260
4)270

2^258/2^n=512 find n
ans:-249

g and s working seperately can mow a field in 8 and 12 hours.if they work in stretches of 1 hour alternately,ganga begining at 9 am,when will they complete?

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It's over one year when I joined TCS.
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