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प्रश्न
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
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उत्तर
The white powder formed when a magnesium ribbon burns in oxygen is magnesium oxide.
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संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
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 | Cooper (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.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Name the metal which has been placed at the bottom of the reactivity series.
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Which non-metal has been placed in the reactivity series of metals?
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be:
(a) sulphur
(b) carbon
(c) calcium
(d) hydrogen
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
Calcium floats over water during the reaction with water. Give reason.
Arrange the following metals in the increasing order of their reactivities:
Copper, Zinc, Aluminium, and Iron
Find the odd one out:
