Advertisements
Advertisements
Question
Write two points of difference in the structures of diamond and graphite.
Solution
| Sl.No | Structure of Diamond | Structure of Graphite |
| 1. | Each carbon atom is joined to four other carbon atoms by strong covalent bonds to form a regular tetrahedron. | Each carbon atom is joined to three other carbon atoms by strong covalent bonds to form flat hexagonal rings. |
| 2. | Compact and rigid structure (hard) |
Layered structure (soft) |
APPEARS IN
RELATED QUESTIONS
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
Name the element whose one of the allotropic forms is buckminsterfullerene.
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?
What is a covalent bond?
Which inert gas does the H atom in HCl resemble in electron arrangement?
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)
Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
Describe the structure of graphite with the help of a labelled diagram.
Out of KCl, HCl, CCl4 and NaCl, the compounds which are not ionic are:
(a) KCl and HCl
(b) HCl and CCl4
(c) CCl4 and NaCl
(d) KCl and CCl4
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.
You can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? Why?
Give the characteristic properties of covalent compounds.
Explain the bonding in methane molecule using electron dot structure.
The particles present in strong electrolytes are
Electrons are getting added to an element Y:
which electrode will Y migrate to during the process of electrolysis?
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
Explain covalent bond with example.
Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that ______.
In covalent bond formation, the sharing of ______ electrons takes place in their outermost shell.
