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प्रश्न
How do non-metals react with hydrogen? Explain with an example.
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उत्तर
Non-metals react with hydrogen to form covalent hydrides. The non-metal hydrides are formed by the sharing of electrons; that is, non-metal hydrides are formed by covalent bonding.
Sulphur is a non-metal which combines with hydrogen to form a covalent hydride called hydrogen sulphide (H2S).
\[\ce{\underset{Hydrogen}{H2_{(g)}} + \underset{(Non-metal)}{\underset{Sulphur}{S_{(I)}}} -> \underset{(Covalent hydride)}{\underset{Hydrogen sulphide}{H2S_{(g)}}}}\]
Hydrogen sulphide gas has a characteristic odour resembling rotten eggs.
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संबंधित प्रश्न
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 the metal which has been placed at the bottom of the reactivity series.
Complete and balance the following equation:
\[\ce{Fe_{(s)} + H2O_{(g)} ->[Red heat]}\]
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
Name another metal oxide which behaves like aluminium oxide.
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?
Which non-metal has been placed in the reactivity series of metals?
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 E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) Give one example of an element like E.
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
What is the characteristic of the electronic configuration of noble gases?
Which one among the following is an acidic oxide?
Find the odd one out:
