Advertisements
Advertisements
प्रश्न
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
Advertisements
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).
APPEARS IN
संबंधित प्रश्न
Name the type of bonds formed in ionic compounds and in the compounds formed by carbon.
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?
Draw the electron-dot structure of H2O compound and state the type of bonding.
The atomic numbers of four elements P, Q, R and S are 6, 10, 12 and 17 respectively. Which two elements can combine to form a covalent compound?
(a) P and R
(b) Q and S
(c) P and S
(d) R and S
What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Explain the following briefly:
Cl2 is a non polar molecule, while HCl is a polar molecule.
Explain the following:
Covalent compounds are generally gases or liquids or soft solids.
Choose the correct answer from the options given below
Which one is not example of polar covalent compound?
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
In the liquid state, X will
Draw an electron dot diagram to show the formation of the following compound.
Magnesium chloride [ H=1, C=6, Mg=12, Cl=17].
Draw the electron dot diagram and structure of nitrogen molecule.
Explain the following:
Water is a polar covalent molecule.
What are Allotropes? Name any two allotropic forms of carbon. Give one use of it.
From the following hydrocarbon _______ is the cyclic hydrocarbon.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
When ethyl alcohol and acetic acid are mixed, the resulting ester has a chemical formula ______.
Statement (A): Covalent compounds are bad conductors of electricity.
Reason (B): Covalent compounds contain charged particles (ions)
State the reasons, why carbon cannot
- Lose four electrons to form C4+ cation and
- Gain four electrons to form C4- anion.
How does carbon overcome this problem to form compounds?
Non-polar covalent compounds are ______ conductors of heat and electricity.
