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प्रश्न
The number of isomers formed by the hydrocarbon with molecular formula C5H12 is:
(a) 2
(b) 5
(c) 3
(d) 4
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उत्तर
3
The number of isomers formed by the hydrocarbon pentane, with molecular formula C5H12, is 3. They are n-pentane, isopentane and neopentane.
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संबंधित प्रश्न
What is the atomic number of carbon. Write its electronic configuration.
What is buckminsterfullerene?
Give the formula of the compound that would be formed by the combination of the following pair of elements:
Al and Cl2
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 solution of one of the following compounds will not conduct electricity. This compounds is:
(a) NaCl
(b) CCl4
(c) MgCl2
(d) CaCl2
Which of the following has a triple bond as well as single bonds?
(a) ethene
(b) methane
(c) ethyne
(d) nitrogen
The electronic configurations of three elements X, Y and Z are as follows:
| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.
The pencil leads are made of mainly:
(a) lithium
(b) charcoal
(c) lead
(d) graphite
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Methanol
Name a neutral covalent molecule which contains one lone pair of electrons.
Which of the following is a common characteristic of a covalent compound?
Draw an electron dot diagram to show the formation of the following compound.
Methane
What are the term defined below?
A bond formed by share pair of electrons, each bonding atom contributing one electron to the pair.
Draw the electron dot diagram and structure of nitrogen molecule.
Give an example of the covalent bond formed by
(i) Similar atoms (ii) Dissimilar atoms
Write an Explanation.
Alkene
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc}\phantom{......}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\ \phantom{.....}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C = C}\\\phantom{.....}|\phantom{.........}|\\ \phantom{.....}\ce{H}\phantom{........}\ce{H}\end{array}\] |
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of ______.
Carbon can neither form C4- cation nor C4 anion. Why?
Name the following:
\[\ce{CH3 - CH2CH = CH2}\]
