CBSE Class 10 Science 2017 · Paper 531 · Question 27
A student is given equal amount of three samples of water with temporary hardness labelled as ‘A’, ‘B’ and ‘C’. He keeps the three samples at different temperatures – A at room temperature, B at and C at . Which sample will give maximum amount of lather when mL of soap solution is added to each sample and shaken for equal time ?
- (a)(A) only
- (b)Both (A) & (B)
- (c)Both (B) and (C)
- (d)(C) only
Answer
(d) (C) only
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