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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
उत्तर
cumene
Cumene is not an allotrope of carbon. Allotropes of carbon are diamond, graphite and buckministerfullerene.
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संबंधित प्रश्न
Write structural formula of Methane.
Explain why carbon forms compounds mainly by covalent bond.
Name the type of bonds formed in ionic compounds and in the compounds formed by carbon.
Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
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What type of bonds are present in H2 molecule? Draw their electron-dot structures.
What is a covalent bond?
How will you find out which of the water soluble compound A or B is ionic?
Which inert gas does the H atom in HCl resemble in electron arrangement?
Draw an electron dot diagram for the formation of the following. State the type of bonding present in them.
Hydroxyl ion
Choose and write the correct option.
Which type of carbon-carbon bonds are present in Vanaspati ghee?
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
X is likely to have a :
Name a neutral covalent molecule which contains one lone pair of electrons.
An element L consists of molecules.
Why L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?
What are Allotropes? Name any two allotropic forms of carbon. Give one use of it.
Write scientific reason.
Carbon has the property of forming many compounds.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Cation is formed when ______.
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of
The table shows the electronic structures of four elements.
| Element | Electronic Structure |
| P | 2, 6 |
| Q | 2, 8, 1 |
| R | 2, 8, 7 |
| S | 2, 8, 8 |
- Identify which element(s) will form covalent bonds with carbon.
- “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.
