Question

A student takes four test tubes marked P, Q R and S of 25 mL capacity and fills 10 mL of distilled water in each. He dissolves one spoon full of four different salts in each as-KCl in P, NaCl in Q CaCI2 in Rand MgCI2 in S. He then adds about 2 mL of a sample of soap solution to each of the above test tubes. On shaking the contents of each of the test tubes, he is likely to observe a good amount of lather (foam) in the test tubes marked:; A. P and Q; B. R and S; C. P, Q and R; D. P, Q and S(Delhi - 2016)

Answer 1

Answer:

sry dont know that answer