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प्रश्न
A covalent molecule having a double bond between its atoms is:
(a) Hydrogen
(b) Oxygen
(c) water
(d) ammonia
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उत्तर
(b) Oxygen
In an oxygen molecule, each oxygen atom shares its 2 electrons to complete its octet and forms double covalent bond between them.
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संबंधित प्रश्न
Elements forming ionic compounds attain noble gas configuration by either gaining or losing electrons from their outermost shells. Give reason to explain why carbon cannot attain noble gas configuration in this manner to form its compounds.
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
Name a carbon containing molecule which has two double bonds.
What is the atomic number of carbon. Write its electronic configuration.
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)
The number of covalent bonds in pentane (molecular formula C5H12) is:
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is:
(a) fifty
(b) sixty
(c) seventy
(d) ninety
You can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? Why?
What is the difference between ionic compounds and polar covalent compounds?
Explain the following:
polar covalent compounds electricity.
Molecular formula of Propane is C3H8 , write the structural formula of propane.
Explain the structure of Ammonium ion.
Explain the following:
Non-polar covalent compounds are insoluble in water.
What is the term defined below?
A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
Define the functional group and complete the following table.
| S.I. No. | Functional Group | Compound | Formula |
| (1) | ______________ | _______________ |
C2H5OH |
| (2) | _______________ | _______________ | CH3CHO |
Name the types of Hydrocarbons.
Consider the coordination compound, K2[Cu(CN)4]. A coordinate covalent bond exists between:
State the reasons, why carbon cannot
- Lose four electrons to form C4+ cation and
- Gain four electrons to form C4- anion.
How does carbon overcome this problem to form compounds?
