Name the ore of mercury and state the form in which it is found in nature. Write the chemical equations along with the condition required for the reactions involved in the extraction of mercury from its ore.
The metals which are found in both free state as well as combined state are :
Three metal samples of magnesium, aluminium and iron were taken and rubbed with sand paper. These samples were then put separately in test tubes containing dilute hydrochloric acid. Thermometers were also suspended in each test tube so that their bulbs dipped in the acid. The rate of formation of bubbles was observed. The above activity was repeated with dilute nitric acid and the observations were recorded.
Assertion (A) : A piece of Zinc metal gets reddish brown coating when kept in copper sulphate solution for some time. Reason (R) : Copper is more reactive metal than Zinc.
Assertion (A) : Different metals have different reactivities with water and dilute acids. Reason (R) : Extraction of a metal from its ore depends on its position in the reactivity series.
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows. | Metal | Iron(II) sulphate | Copper(II) sulphate | Zinc sulphate | Silver nitrate | |-------|-------------------|---------------------|---------------|----------------| | A | No reaction | Displacement | | | | B | Displacement | | No reaction | | | C | No reaction | No reaction | No reaction | Displacement | | D | No reaction | No reaction | No reaction | No reaction | Use the Table above to answer the following questions about metals A, B, C and D. (i) Which is the most reactive metal? (ii) What would you observe if B is added to a solution of Copper(II) sulphate? (iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.
© 2026 PadhAiPro. This question is provided for educational purposes.
