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प्रश्न
Give one example of a molecule containing a single covalent bond.
उत्तर
A molecule containing a single covalent bond: hydrogen molecule (H − H)
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संबंधित प्रश्न
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?
Name a carbon containing molecule which has two double bonds.
What type of bonds are present in CH4 molecule? Draw their electron-dot structures.
Fill in the blank in the following sentence:
In forming N2 molecule, .............. electrons are shared by each atom of 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.
An element A has 4 valence electrons in its atom whereas element B has only one valence electron in its atom. The compound formed by A and B does not conduct electricity. What is the nature of chemical bond in the compound formed? Give its electron-dot structure.
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Observe the straight chain hydrocarbons given below and answer the following
questions :
i) Which of the straight chain compounds from A and B is saturated and unsaturated straight chains?
ii) Name these straight chains.
iii) Write their chemical formulae and number of – CH2 - units.
What do you understand by lone pair and shared pair?
Explain the structure of Ammonium ion.
Explain the following:
Covalent compounds are generally gases or liquids or soft solids.
What do you understand by dipole (polar) molecule?
Draw the electron dot structure of covalent compound methane (non polar) and HCL (polar) and give two difference between them.
Name gas with rotten egg smell.
The molecular masses of a carbon compound spread over a range of _______.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{.........}\ce{H}\\ \phantom{.........}|\\ \ce{H - C ≡ C - C - H}\\ \phantom{.........}|\\ \phantom{.........}\ce{H} \end{array}\] |
The correct structural formula of butanoic acid is
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
Molecular reactions are ______ in the covalent compound.
Write notes on the characteristics of covalent compounds.
