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प्रश्न
One of the following is not an allotrope of carbon. This is:
(a) diamond
(b) graphite
(c) cumene
(d) buckministerfullerene
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उत्तर
cumene
Cumene is not an allotrope of carbon. Allotropes of carbon are diamond, graphite and buckministerfullerene.
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संबंधित प्रश्न
Give reason why carbon compounds are generally poor conductors of electricity.
Name the element whose one of the allotropic forms is buckminsterfullerene.
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?
Explain why, diamond has a high melting point.
One of the following compounds is not ionic in nature. This compound is:
(a) Lithium chloride
(b) Ammonium chloride
(c) Calcium chloride
(d) Carbon tetrachloride
Give two example in following case:
Solid covalent compounds
Give two example in following case:
Gaseous non polar compounds
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 |
Explain the following:
Non-polar covalent compounds are insoluble in water.
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
The type of bonding in X will be
What do you understand by dipole (polar) molecule?
State the type of bond formed when the combining atom has zero E.N. difference.
Element A has 2 electrons in its M shell. Element B has atomic number 7.
Write equations to show how A and B form ions.
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
Define the functional group and complete the following table.
| S.I. No. | Functional Group | Compound | Formula |
| (1) | ______________ | _______________ |
C2H5OH |
| (2) | _______________ | _______________ | CH3CHO |
Write an Explanation.
Alkane
Give an example for each of the following statement
A compound in which two Covalent bonds are formed.
Which of the following is the purest form of carbon?
When ethyl alcohol and acetic acid are mixed, the resulting ester has a chemical formula ______.
An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following
