Question 3 :
An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that

Question 5 :
An element reacts with oxygen and give slaked lime. The element is

Question 6 :
<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?

Question 7 :
The earthly or undesired materials associated with an ore are called

Question 8 :
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 9 :
The earthly or undesired materials associated with an ore are called

Question 10 :
Give an example of a metal which is a liquid at room temperature.

Question 11 :
Food cans are coated with tin and not with zinc because

Question 12 :
Give an example of a metal which is a liquid at room temperature.

Question 15 :
Give an example of a metal which can be easily cut with a knife.

Question 16 :
Which of the following methods is suitable for preventing an iron frying pan from rusting?

Question 17 :
Which of the following methods is suitable for preventing an iron frying pan from rusting?

Question 18 :
Give an example of a metal which is a poor conductor of heat.

Question 19 :
<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?

Question 20 :
Which among the following alloys contain non-metal as one of its constituents?

Question 21 :
An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that

Question 22 :
Give an example of a metal which can be easily cut with a knife.

Question 23 :
Food cans are coated with tin and not with zinc because

Question 24 :
Give an example of a metal which is a good conductor of heat.

Question 25 :
<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 26 :
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 27 :
Which of the following methods is suitable for preventing an iron frying pan from rusting?

Question 28 :
Give an example of a metal which is a poor conductor of heat.

Question 30 :
Give an example of a metal which is a good conductor of heat.