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प्रश्न
What are covalent compounds?
उत्तर १
Covalent compounds are the compounds that are formed by the mutual sharing of valence electrons by the constituent atoms. For example, a molecule of methane (CH4) is formed when the carbon atom shares one of its four valence electrons with one electron of each of the four H atoms.
उत्तर २
Covalent compounds are those where atoms share their electrons with other atoms to form more stable structure.
संबंधित प्रश्न
Write the number of covalent bonds in the molecule of butane, C4H10.
Why covalent compounds are different from ionic compounds?
Ethane, with the molecular formula C2H6 has ______.
Butanone is a four-carbon compound with the functional group:
State whether the following statement is true or false:
Diamond and graphite are the covalent compounds of carbon element (C)
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
Compare the properties of ionic compounds and covalent compounds.
What is buckminsterfullerene?
Why is graphite used for making dry cell electrodes but diamond is not?
Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.
Friedrich Wohler converted an inorganic compound into an organic compound in the laboratory.
Write the name and formula of organic compound formed.
Give the formula of the compound that would be formed by the combination of the following pair of elements:
Al and Cl2
Give the formula of the compound that would be formed by the combination of the following pair of elements:
K and H
Which of the following cannot exhibit isomerism?
(a) C4H10
(b) C5H12
(c) C3H8
(d) C6H14
State the type of bonding in the following molecule.
Methane
Give two example in following case:
Solid covalent compounds
Give two example in following case:
Gaseous polar compounds
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Methane
Explain the following briefly:
Sodium chloride dissolves in water but carbon tetra chloride is insoluble in water.
Explain the following briefly.
Pure water does not conduct electricity, but on adding sodium chloride to it, it starts conducting electricity.
What do you understand by lone pair and shared pair?
Name a neutral covalent molecule which contains one lone pair of electrons.
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?
The electronic configuration of N2 is 2, 5. How many electrons in the outer shell of a N atom are not involved in the formation of a nitrogen molecule?
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.
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
What is the difference between a polar covalent compound and a non-polar covalent compound?
The molecular masses of a carbon compound spread over a range of _______.
The number of electrons in the valence shell of a carbon atom is 4.
Your body is made up of carbon.
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)
 |
The number of pi-bonds present in benzoic acid molecule are ______.
Which of the following is the purest form of carbon?
The I.U.P.A.C name of CH3CH2CH = CH2 is?
A molecule of ammonia (NH3) has
Which of the following compound(s) possesses a high melting point?
Statement (A): Covalent compounds are bad conductors of electricity.
Reason (B): Covalent compounds contain charged particles (ions)
"Carbon prefers to share its valence electrons with other atoms of carbon or with atoms of other elements rather than gaining or losing the valence electrons in order to attain noble gas configuration." Give reasons to justify this statement.
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.
