MPSC PYQScienceSurface Tensionenglish
Identify incorrect sentences of the following ? 1) When soluble substances like salt are dissolved in water , surface tension of water decreases. 2) When sparingly soluble substances like soap , phenol are dissolved in water , surface tension of liquid decreases. 3) When insoluble impurities are added to water , it decreases surface tension of water. 4) None of above.
A.1 is wrong per key
B.2 wrong
C.3 wrong
D.4 only
Correct answer: A