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प्रश्न
Why is diamond used for making cutting tools (like glass cutters) but graphite is not?
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उत्तर
Diamond is the hardest, naturally occuring material known. Owing to its rigid structure, it can be used as glass cutters. Whereas graphite is a layered structure of carbon atoms and is very soft so, it cannot be used for making cutting tools.
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संबंधित प्रश्न
What would be the electron dot structure of carbon dioxide which has the formula CO2?
What is the atomic number of carbon. Write its electronic configuration.
Why does carbon form compounds mainly by covalent bonding?
Explain the formation of a chlorine molecule on the basis of electronic theory of valency.
What type of bonding would you expect between Carbon and Chlorine?
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
The solution of one of the following compounds will not conduct electricity. This compounds is:
(a) NaCl
(b) CCl4
(c) MgCl2
(d) CaCl2
What are the conditions necessary for the formation of covalent molecules?
For each compound mentioned above give the formulae of ions formed in aqueous solution.
Explain the following term with example.
Covalent bond
Write answer as directed.
What causes the existance of very large number of carbon compound ?
Explain the following:
Covalent compounds are generally gases or liquids or soft solids.
Explain why Carbon tetrachloride does not dissolve in water.
Draw the electron dot diagram and structure of nitrogen molecule.
Draw the electron dot structure of covalent compound methane (non polar) and HCL (polar) and give two difference between them.
Your body is made up of carbon.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
______ is an example of a covalent compound having a high melting point.
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.
