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प्रश्न
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
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उत्तर
Covalent compounds have usually low melting points and boiling points. But ionic compounds have high melting points and boiling points.
An example for a covalent compound is methane (CH4).
An example for an ionic compound is sodium chloride (NaCl).
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संबंधित प्रश्न
List three characteristic properties of covalent compounds.
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.
What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
Give one example of a molecule containing a triple covalent bond.
Fill in the following blank with suitable word:
The general formula CnH2n for cycloalkanes is the same as that of ...........
How will you find out which of the water soluble compound A or B is ionic?
Draw the electron-dot structure of NH3 and state the type of bonding.
State the type of bonding in the following molecule.
Water
State the type of bonding in the following molecule.
Ammonium ion
Draw all possile structural formulae of compound from their molecular formula given below.
C3H4
Explain the following:
Non-polar covalent compounds are insoluble in water.
Choose the correct answer from the options given below
Condition favorable for formation of a covalent bond is
Draw an electron dot diagram to show the formation of the following compound.
Magnesium chloride [ H=1, C=6, Mg=12, Cl=17].
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
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
Explain covalent bond with example.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
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
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.
