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प्रश्न
Define a covalent bond.
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उत्तर
The chemical bond formed between two combining atoms by mutual sharing of one or more pairs of electrons is called a covalent bond.
संबंधित प्रश्न
List three characteristic properties of covalent compounds.
Give reason why carbon compounds are generally poor conductors of electricity.
State the reason why carbon can neither form C4+ cations nor C4− anions but forms covalent compounds.
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene?
Draw the electron-dot structure of CO2 compound and state the type of bonding.
Which of the following has a triple bond as well as single bonds?
(a) ethene
(b) methane
(c) ethyne
(d) nitrogen
A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be
(a) 200
(b) 198
(c) 202
(d) 196
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Ethene
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Write answer as directed.
Saturated hydrocarbons are classified into three types. Write these names giving one example each.
The covalent bond in which the electrons are shared equally between the combining atoms.
Choose the correct answer from the options given below
Condition favorable for formation of a covalent bond is
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
In the liquid state, X will
What is the term defined below?
A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If B is a diatomic gas, write the equation for the direct combination of A and B to form a compound.
Write scientific reason.
Benzene compounds are called aromatic compounds.
Write a short note.
Characteristics of carbon
List two differences between the properties exhibited by covalent compounds and ionic compounds.
