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प्रश्न
Covalent bonds can be single, double or triple covalent bonds. How many electrons are shared in each? Give an example of each type.
उत्तर
- A single covalent bond is formed by sharing one pair of electrons between atoms, each atom contributes one electron. For example., Molecule of hydrogen [H-H]
- A double covalent bond is formed by the sharing of two pairs of electrons between two atoms. For example., Molecule of oxygen [O=O]
- A triple covalent bond is formed by the sharing of three pairs of electrons between two atoms. For example., Molecule of nitrogen [N≡N]
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संबंधित प्रश्न
Name the element whose one of the allotropic forms is buckminsterfullerene.
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
Give the formula of the compound that would be formed by the combination of the following pair of elements:
Al and Cl2
Explain why, diamond can be used in rock drilling equipment but graphite cannot.
State any two uses of diamond.
The solution of one of the following compounds will not conduct electricity. This compounds is:
(a) NaCl
(b) CCl4
(c) MgCl2
(d) CaCl2
Fill in the blank with correct word from the bracket.
Melting and boiling points of covalent compounds are generally ______ (low, high).
Explain the following:
Polar covalent compounds conduct electricity?
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.
What is a covalent bond?
