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प्रश्न
With the help of examples, describe how metal oxides differ from non-metal oxides.
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उत्तर
Metal oxides are generally basic in nature, which can turn red litmus solution to blue, while non-metal oxides are generally acidic in nature, which can turn blue litmus solution to red. For example, sodium oxide and potassium oxide are metal oxides which are basic in nature; carbon dioxide and sulphur dioxide are non-metal oxides which are acidic in nature.
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संबंधित प्रश्न
Write equations for the reactions of iron with steam.
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.
Differentiate between metal and non-metal on the basis of their chemical properties.
Name two metals which form amphoteric oxides.
Write an equation for the reaction of:
Sodium with oxygen
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Complete and balance the following equation:
\[\ce{Na + O2 ->}\]
The white powder formed when magnesium ribbon burns in oxygen is of ______.
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
