Advertisements
Advertisements
प्रश्न
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
Advertisements
उत्तर
1. Diamonds are used in making jewellery because of their extraordinary shine and texture.
2.Graphite is used in making pencil leads (black core of pencils) because of its black colour and softness.
APPEARS IN
संबंधित प्रश्न
Give one example of a molecule containing a single covalent bond.
Give one example of a molecule containing a triple covalent bond.
Fill in the blanks in the following sentence:
In forming oxygen molecule, .............. electrons are shared by each atom of oxygen.
Which inert gas does the Cl atom in HCl resemble in electron arrangement?
Draw the electron-dot structure of H2O compound and state the type of bonding.
Give two example in following case:
Gaseous non polar compounds
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Methane
Draw all possible structural formulae of compound from their molecular formula given below.
C3H8
Explain the following term with example.
Hetero atom in a carbon compound
Taking hydrogen chloride and methane as examples, distinguish between a polar covalent bond and a non polar covalent bond.
Explain the following briefly:
Cl2 is a non polar molecule, while HCl is a polar molecule.
Name a neutral covalent molecule which contains one lone pair of electrons.
The electronic configuration of N2 is 2, 5. How many electrons in the outer shell of a N atom are not involved in the formation of a nitrogen molecule?
What do you understand by dipole (polar) molecule?
Answer the following question.
What is methane? Draw its electron dot structure. Name the type of bonds formed in this compound. Why are such compounds:
(i) poor conductors of electricity? and
(ii) have low melting and boiling points? What happens when this compound burns in oxygen?
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{.........}\ce{H}\\ \phantom{.........}|\\ \ce{H - C ≡ C - C - H}\\ \phantom{.........}|\\ \phantom{.........}\ce{H} \end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
 |
Give an example for each of the following statement.
Formation of coordinate covalent bond between NH3 ➝ BF3 molecules
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
______ is an example of a covalent compound having a high melting point.
