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प्रश्न
State differences between the properties of ionic compounds and covalent compounds.
Give five differences between electrovalent and covalent compounds.
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उत्तर
| Sr. No. | Basis of Distinction | Electrovalent (Ionic) Compounds | Covalent compounds |
| 1. | Physical State | They are generally crystalline solids. | They are generally volatile liquids or gases. |
| 2. | Melting and Boiling Points | They have high melting and boiling points. | They have low melting and boiling points. |
| 3. | Conductivity | They are bad conductors of electricity in solid state but are good conductors in the molten or aqueous states. | They do not conduct electricity. |
| 4. | Solubility | They are generally soluble in water but insoluble in organic solvents. | They are generally soluble in organic solvents but insoluble in water. |
| 5. | Rate of Reaction | They consist of ions. So, their reactions in solutions are fast. | They consist of molecules. So, their reactions in solutions are slow. |
संबंधित प्रश्न
Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2, 8, 1 |
2, 8, 7 |
2, 5 |
1 |
Answer the following question based on the table above:
What is the formula of the compound formed between W and X.
What do you think would be the observation of `alpha` particle scattering experiment if carried out on (i) heavy nucleus like platinum (ii) light nuclei like litheum.
\[\ce{^24_12Mg}\] and \[\ce{^26_12Mg}\] are symbols of isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to :
i. the composition of their nuclei
ii. their electronic configurations
(b) Give reasons why the two isotopes of magnesium have different mass numbers.
Identify the following reaction as either oxidation or reduction:
K - e- → K+
Five atoms are labelled V to Z
| Atoms | Mass Number | Atomic Number |
| V | 40 | 20 |
| W | 19 | 9 |
| X | 7 | 3 |
| Y | 16 | 8 |
| Z | 14 | 7 |
- Which one of these atoms
(1) contains 7 protons;
(2) has an electronic configuration 2, 7? - Write down the formula of the compound formed by atoms X and Y.
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^31_15P}\]
The element that would form anion by gaining electrons in a chemical reaction is ______.
How many atoms of each kind are present in the following molecule:
water
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a metal.
