Chemistry
Grade-10
Easy
Question
The colour of the oxide formed when copper reacts with the oxygen is-
- Blue
- Black
- Grey
- White
Hint:
Black
The correct answer is: Black
Heated copper metal reacts with oxygen to form the black copper oxide.
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The acids present in the royal water is:
The acids present in the royal water is:
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Match the following according to the correct order of reactivity.
| a) Potassium | i) 4 |
| b) Calcium | ii) 2 |
| c) Zinc | iii) 3 |
| d) Lead | iv) 1 |
Match the following according to the correct order of reactivity.
| a) Potassium | i) 4 |
| b) Calcium | ii) 2 |
| c) Zinc | iii) 3 |
| d) Lead | iv) 1 |
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Which of the following metal reacts with steam to produce oxide in place of hydroxide?
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Reason (R): Anodising is a process of coating iron with a layer of zinc.
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Choose one of the following which shows the correct arrangement of the given metals in ascending order of their reactivity.
Choose one of the following which shows the correct arrangement of the given metals in ascending order of their reactivity.
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Amphoteric oxide acts as
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Chemical properties include:
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When a metal reacts with the acid lead, it forms:
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