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प्रश्न
What do you understand by redox reactions?
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उत्तर
Transfer of electron(s) is involved in the formation of an electrovalent bond. The electropositive atom undergoes oxidation, while the electronegative atom undergoes reduction. This is known as a redox reaction.
संबंधित प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Five atoms are labelled from A to E.
| Atoms | Mass No. | Atomic No. |
| A | 40 | 20 |
| B | 19 | 9 |
| C | 7 | 3 |
| D | 16 | 8 |
| E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valelncy 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4
What type of bond is formed between two atoms, when the electronegative difference between them is High ?
What type of bond is formed between two atoms, when the electronegative difference between them is low ?
Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.
Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one forms a cation?
What is an α (alpha) particle?
How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
Explain fractional atomic mass. What is the fractional mass of chlorine?
Choose the correct option
Which of the following is the correct electronic configuration of potassium?
The element that would form anion by gaining electrons in a chemical reaction is ______.
Explain Octet rule with an example.
The element that would form cation due to the loss of electrons during the chemical reaction is ______.
Spot the error/correct the wrong statement:
In the formation of compounds, the inner shell electrons of an atom involved in bonding.
Match the following:
| 1. | Monoatomic gaseous atom | a. | Electrovalent bond |
| 2. | Octet rule | b. | Benzene |
| 3. | Ionic bond | c. | Water |
| 4. | Non-polar solvent | d. | Electronic theory of valence |
| 5. | Polar solvent | e. | Noble gases |
Match the following:
| 1. | Atomic bond | a. | Oxygen and hydrogen |
| 2. | Atoms with different electronegativities | b. | acceptor bond |
| 3. | An atom that accepts electron pair | c. | covalent bond |
| 4. | Rusting of iron | d. | donor atom |
| 5. | An atom that provides electron pair | e. | oxidation |
| f. | ionic bond |
| Name of compound | Type of compound | |
| a. | Sodium chloride | ______ |
| b. | ______ | co-ordinate covalent compound |
| c. | Methane | ______ |
| d. | Fluorine molecule | ______ |
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a metal.
Elements A, B and C have atomic number 17, 19 and 10 respectively.
Write down the formula of the compound formed by two of the above elements.
