When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change which is observed is:

When a copper strip is kept immersed in freshly prepared ferrous sulphate solution taken in test-tube, ____

When a copper strip is kept immersed in free prepared ferrous sulphate solution taken test-tube, ____

Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?

When an aluminium strip is immersed into ZnSO_4 solution, the colour of the solution ______

A student strongly heats hydrated ferrous sulphate salt in a dry test-tube. He would observe a:

Ms. Neelam, a class 10 teacher took Cu, Al, Pb and Zn strips respectively in four test tubes labelled as, I, II, III and IV and added 10 mL of freshly prepared ferrous sulphate solution to each test tube as shown in the figure : Black residue would be obtained in test tubes

A student takes Cu, Al, Fe and Zn piees separtely in four test tubes labelled as I,II, III and IV respectively. He adds 10mL of freshly prepared ferrous sulphate solution to each test tube observes the colour of the metal residue in each case. He would observe a black residue in the test tube: