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प्रश्न
What is graphite?
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उत्तर
Graphite is an allotrope of carbon, and is a soft, greyish black and opaque substance. The graphite is made up of carbon atoms
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संबंधित प्रश्न
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many hexagons of carbon atoms are present in one molecule of buckminsterfullerene?
What type of bond exist in CCl4?
The solution of one of the following compounds will not conduct electricity. This compounds is:
(a) NaCl
(b) CCl4
(c) MgCl2
(d) CaCl2
A covalent molecule having a double bond between its atoms is:
(a) Hydrogen
(b) Oxygen
(c) water
(d) ammonia
Which of the following has a triple bond as well as single bonds?
(a) ethene
(b) methane
(c) ethyne
(d) nitrogen
Explain the following:
polar covalent compounds electricity.
Give two example in following case:
Solid covalent compounds
Which element exhibits the property of catenation to maximum extent and why?
Match the pairs.
| Group 'A' | Group 'B' |
| a. C2H6 | 1. Unsaturated hydrocarbon |
| b. C2H2 | 2. Molecular formula of an alcohol |
| c. CH4O | 3. Saturated hydrocarbon |
| d. C3H6 | 4. Triple bond |
Draw all possile structural formulae of compound from their molecular formula given below.
C4H10
Explain the following:
Non-polar covalent compounds are insoluble in water.
Acids dissolve in water and produce positively charged ions. Draw the structure of these positive ions.
Give an example for each of the following statement.
Formation of coordinate covalent bond between NH3 ➝ BF3 molecules
When ethyl alcohol and acetic acid are mixed, the resulting ester has a chemical formula ______.
Two carbon atoms can always form one or two covalent bonds.
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
The correct structural formula of butanoic acid is
Statement (A): Covalent compounds are bad conductors of electricity.
Reason (B): Covalent compounds contain charged particles (ions)
The electron dot structure of chlorine molecule is:
Non-polar covalent compounds are ______ conductors of heat and electricity.
