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प्रश्न
Give two general properties of ionic compounds and two those of covalent compounds.
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उत्तर
| Ionic Compounds | Covalent Compounds |
| Ionic compounds usually have high melting and boiling points. | Covalent compounds usually have low melting and boiling points. |
| Ionic compounds generally conduct electricity when dissolved in water or in a molten state. | Covalent compounds usually do not conduct electricity. |
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संबंधित प्रश्न
Why covalent compounds are different from ionic compounds?
Explain the bonding in methane molecule using electron dot structure.
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene?
What type of bonds are present in CH4 molecule? Draw their electron-dot structures.
Why does carbon form compounds mainly by covalent bonding?
Why is diamond used for making cutting tools (like glass cutters) but graphite is not?
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure.
(a) Name the element E.
(b) What is allotrope A.
(c) What is allotrope B?
(d) What is allotrope C?
(e) Which allotrope is used in making jewellery?
(f) Which allotrope is used in making anode of a dry cell?
Explain the following:
polar covalent compounds electricity.
Complete the following:
When the nuclei of two different reacting atoms are of ______ mass, then a bond so formed is called ______ covalent bond. (equal, unequal, polar, non-polar)
The covalent bond in which the electrons are shared equally between the combining atoms.
The electronic configuration of N2 is 2, 5. How many electrons in the outer shell of a N atom are not involved in the formation of a nitrogen molecule?
Fill in the blank from the choice given in bracket.
The compound that does not have a lone pair of electrons is ___________. (Water, Ammonia, carbon tetrachloride)
Explain why carbon tetrachloride does not dissolve in water.
Write an Explanation.
Alkene
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
 |
Which of the following is the purest form of carbon?
Explain dipole (polar) molecule by taking hydrogen chloride as an example.
