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प्रश्न
State differences between the properties of ionic compounds and covalent compounds.
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उत्तर
| Ionic compounds | Covalent compounds |
| These contain electrovalent or ionic bond. | These contain covalent bond. |
| They are generally crystalline solids. | They are generally volatile liquids or gases. |
| They have high melting and boiling points. | They have low melting and boiling points. |
| They are bad conductors of electricity in solid state but are good conductors in the molten or aqueous states. | They do not conduct electricity. |
| They are generally soluble in water but insoluble in organic solvents. | They are generally soluble in organic solvents but insoluble in water. |
| They consist of ions. So, their reactions in solutions are fast. | They consist of molecules. So, their reactions in solutions are slow. |
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संबंधित प्रश्न
In term of electron transfer, define Oxidation
How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
State the following is a reduction reaction or oxidation reaction.
\[\ce{A^3+ + e- -> A^2+}\]
Five atoms are labeled 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 electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
Name the following:
An element having valency 'zero'
Write down the electronic configuration of
(i) chlorine atom (ii) chlorine ion
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^40_20Ca}\]
How do atoms attain Noble gas electronic configuration?
The valency of noble gases is ______.
Complete the following table:
| Atoms | Atomic number | Electron distribution | |
| 1. | O | 8 | ______ |
| 2. | N | ______ | ______ |
| 3. | ______ | 17 | ______ |
| 4. | ______ | ______ | 2,8,2 |
