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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
Name the type of bonds formed in ionic compounds and in the compounds formed by carbon.
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
Name the hardest natural substance known.
Give one example of a molecule containing a triple covalent bond.
Explain the formation of a chlorine molecule on the basis of electronic theory of valency.
Which inert gas does the Cl atom in HCl resemble in electron arrangement?
What is the difference between ionic compounds and covalent compounds?
Draw all possible structural formulae of compound from their molecular formula given below.
C3H8
Explain the following term with example.
Unsaturated hydrocarbon
(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 :
Explain why Carbon tetrachloride does not dissolve in water.
Name a neutral covalent molecule which contains one lone pair of electrons.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What type of bond is formed between Y and Z.
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?
Name the types of Hydrocarbons.
Number of valence electrons in a carbon atom is _______.
Write an Explanation.
Alkene
Considering MgCl2 as ionic compound and CH4 as covalent compound give any two differences between these two compounds.
Identify the incorrect statement and correct them.
- Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity.
- Ionic bond is a weak bond when compared to Hydrogen bond.
- Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
- Loss of electrons is called Oxidation and gain of electron is called Reduction.
- The electrons which are not involved in bonding are called valence electrons.
Write notes on the characteristics of covalent compounds.
