Question 1 :
The earthly or undesired materials associated with an ore are called

Question 4 :
An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that

Question 6 :
An element reacts with conductivity of metals oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be

Question 8 :
An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that

Question 9 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19c7e273b230584979aeb.JPG' /> Samples of four metals A, B, C and D were taken and added to the different solution one by one. The results obtained have been tabulated above. Use the given table to answer the following questions about metals A, B, C and D. Arrange the metals in decreasing order of reactivity.

Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19c7c273b230584979ae9.JPG' /> Samples of four metals A, B, C and D were taken and added to the different solution one by one. The results obtained have been tabulated above. Use the given table to answer the following questions about metals A, B, C and D. Which is the most reactive metal?