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प्रश्न
A covalent molecule having a double bond between its atoms is:
(a) Hydrogen
(b) Oxygen
(c) water
(d) ammonia
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
Choose the correct answer from the options given below:
Which of the following is a common characteristic of a covalent compound?
1) high melting point
2) consists of molecules
3) always soluble in water
4) Conducts electricity when it is in the molten state
Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many hexagons of carbon atoms are present in one molecule of buckminsterfullerene?
Give the formula of the compound that would be formed by the combination of the following pair of elements:
K and H
What type of bonding would you expect between Hydrogen and Chlorine?
Using electron-dot diagrams which show only the outermost shell electrons, show how a molecule of nitrogen, N2, is formed from two nitrogen atoms. What name is given to this type of bonding? (Atomic number of nitrogen is 7)
The molecules having triple bond in them are:
(a) oxygen and ethyne
(b) carbon dioxide and ammonia
(c) methane and ethene
(d) nitrogen and ethyne
A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads.
(a) What is element X?
(b) Name the allotrope Y.
(c) State whether allotrope Y is a good conductor or non-conductor of electricity.
(d) Name one use of allotrope Y (other than lubrication and pencil leads)
(e) Name two other allotropes of element X.
The electronic configurations of two elements A and B are given below:
| A | 2, 6 |
| B | 2, 8, 1 |
(a) What type of chemical bond is formed between the two atoms of A?
(b) What type of chemical bond will be formed between the atoms of A and B?
Define a covalent bond.
Give two example in following case:
Liquid non polar compounds
Draw all possible structural formulae of compound from their molecular formula given below.
C3H8
State the type of bonding in the following molecule.
Water
Potassium chloride is an electrovalent compound, while hydrogen chloride is a covalent compound, But, both conduct electricity in their aqueous solutions. Explain.
Number of valence electrons in a carbon atom is _______.
Cation is formed when ______.
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
Which of the following compound(s) possesses a high melting point?
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.
Name the following:
\[\ce{CH3 - CH2CH = CH2}\]
