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प्रश्न
You can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? Why?
उत्तर
These substances are covalent in nature because bonding between covalent substances are not as strong as ionic substances. So, covalent compounds hold together with weak forces and low melting point. This is why, they vapourise easily and give their odours. However, when ionic compounds comes in contact with air, they cannot give an odour by vapourising.
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संबंधित प्रश्न
List three characteristic properties of covalent compounds.
Name the type of bonds formed in ionic compounds and in the compounds formed by carbon.
Name the element whose one of the allotropic forms is buckminsterfullerene.
Fill in the blank in the following sentence:
In forming N2 molecule, .............. electrons are shared by each atom of nitrogen.
Draw the electron-dot structure of a hydrogen chloride molecule.
Draw the electron-dot structure of CO2 compound and state the type of bonding.
The number of covalent bonds in pentane (molecular formula C5H12) is:
Complete the following:
In case of non-polar covalent bond, the covalent bond is formed in the ______ of atoms and shared electrons are ______ distributed. (corner, middle, equally, unequally)
Give two example in following case:
Liquid non polar compounds
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Explain the following term with example.
Unsaturated hydrocarbon
Fill in the blank with correct word from the bracket.
Melting and boiling points of covalent compounds are generally ______ (low, high).
Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the options A, B, C and D given below:
X is likely to have a ______.
Electrons are getting added to an element Y:
which electrode will Y migrate to during the process of electrolysis?
Draw the electron dot diagram and structure of magnesium chloride.
Write the molecular formula of the given compound.
Acetic acid
Write a short note.
Characteristics of carbon
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ |\phantom{....}|\phantom{....}|\\\ce{H - C - C - C - H}\\ |\phantom{....}|\phantom{....}|\\\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H} \end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{.........}\ce{H}\\ \phantom{.........}|\\ \ce{H - C ≡ C - C - H}\\ \phantom{.........}|\\ \phantom{.........}\ce{H} \end{array}\] |
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
