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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.
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संबंधित प्रश्न
State the type of bonding in the following molecule.
Water
Explain the formation of a chlorine molecule on the basis of electronic theory of valency.
Compare the properties of ionic compounds and covalent compounds.
Which inert gas does the H atom in HCl resemble in electron arrangement?
State any two uses of graphite.
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.
Draw all possile structural formulae of compound from their molecular formula given below.
C3H4
An element L consists of molecules.
What type of bonding is present in the particles that make up L?
Draw an electron dot diagram to show the formation of the following compound.
Magnesium chloride [ H=1, C=6, Mg=12, Cl=17].
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.
Potassium (Atomic No. 19) and chlorine (Atomic No. 17) react to form a compound. On the basis of electronic concept, explain
(i) oxidation
(ii) reduction
(iii)oxidising agent
(iv)reducing agent
Answer the following question.
What is methane? Draw its electron dot structure. Name the type of bonds formed in this compound. Why are such compounds:
(i) poor conductors of electricity? and
(ii) have low melting and boiling points? What happens when this compound burns in oxygen?
Name the types of Hydrocarbons.
Generally, the melting and boiling point of carbon compounds are found to be less than _______ °C.
Write an Explanation.
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Which of the following statements are usually correct for carbon compounds? These
- are good conductors of electricity
- are poor conductors of electricity
- have strong forces of attraction between their molecules
- do not have strong forces of attraction between their molecules.
Which of the following is the formula of Butanoic acid?
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
Name the following:
\[\ce{CH3 - CH2CH = CH2}\]
