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प्रश्न
Describe the structure of diamond. Draw a s imple diagram to show the arrangement of carbon atoms in diamond.
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उत्तर
A crystal of diamond is a molecule of carbon atoms in which each carbon atom is connected to four other carbon atoms by strong covalent bonds forming a regular tetrahedron. As the carbon atoms are held together firmly by covalent bonds, diamond forms a very rigid structure.
The arrangement of carbon atoms in a diamond crystal is shown below:
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संबंधित प्रश्न
State whether the following statement is true or false:
Diamond and graphite are the covalent compounds of carbon element (C).
Which inert gas electron configuration do the Cl atoms in Cl2 molecule resemble? What is this electron configuration?
What is a covalent bond?
How will you find out which of the water soluble compound A or B is ionic?
What type of bonding would you expect between the following pair of elements?
Hydrogen and Chlorine
Draw the electron-dot structure of the following compound and state the type of bonding in the given case:
HCl
Using electron-dot diagrams which show only the outermost shell electrons, show how a molecule of oxygen, O2, is formed from two oxygen atoms. What name is given to this type of bonding?
(At. No. of oxygen = 8)
Explain why, diamond has a high melting point.
State any two uses of diamond.
State any two uses of graphite.
The number of isomers formed by the hydrocarbon with molecular formula C5H12 is ______.
You can buy solid air-freshners in shops. Do you think these substances are ionic or covalent? Why?
What do you understand by polar covalent compounds?
Methane molecule is non-polar molecule. Explain.
State the type of bonding in the following molecule.
Water
Complete the following:
When the nuclei of two different reacting atoms are of ______ mass, then a bond so formed is called ______ covalent bond. (equal, unequal, polar, non-polar)
Give two example in following case:
Liquid non polar covalent compound.
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Methane
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Ethene
Explain the following term with example.
Hetero atom in a carbon compound
Explain the following term with example.
Homopolymer
Write answer as directed.
Saturated hydrocarbons are classified into three types. Write these names giving one example each.
The following structural formula belongs to which carbon compound?
Give examples for the following:
Two solid covalent compounds.
An element L consists of molecules.
- Which type of bond is present in the particles that make up L?
- When L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe change undergone by L?
The particles present in strong electrolytes are
Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the options A, B, C and D given below:
The type of bonding in X will be ______.
State the type of bond formed when the combining atom has small E.N. difference.
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.
Explain the following:
Polar covalent compounds conduct electricity?
Explain covalent bond with example.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{.........}\ce{H}\\ \phantom{.........}|\\ \ce{H - C ≡ C - C - H}\\ \phantom{.........}|\\ \phantom{.........}\ce{H} \end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
 |
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
Molecular reactions are ______ in the covalent compound.
Write notes on the characteristics of covalent compounds.
