Question

21. four test tubes were taken and marked a, b, c and d respectively. 2 ml of solution of al2(so4)3 in water was filled in each of the four test tubes. Clean piece of metal zinc was placed in test tube a, clean iron nail was put in test tube b, clean copper wire was placed in test tube c and a clean aluminium wire was placed in test tube d. It was observed that no change occurred in any of the test tubes. Justify the reason for the observation.

Answer 1

• There is no changes occured in any test tubes because all the metals in test tube a, b, c and d are least reactive than (Al) and placed below aluminium in metal reactivity series.

Answer 2

Answer:

in this question your answer is option D