Question

A student took solution X in a test-tube and added a few drops of universal indicator to it. The solution turned blue. On adding another solution Y to this test-tube drop-wise, the colour of solution changed to green. When a yet another solution Z was added, the solution turned yellow. Which of the following gives the correct conclusion of the student?
(1) X is acid, Y is base, Z is salt solution
(2) X is base, Y is acid, Z is acid
(3) X is acid, Y is base, Z is base
(4) X is base, Y is acid, Z is sugar solution

Answer 1

Answer:

2 is correct

Explanation:

X gives blue therefore it is base.

Y neutralizes X to give green colour.

Z further acidifies the solution to give the colour yellow