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प्रश्न
Why is diamond used for making cutting tools (like glass cutters) but graphite is not?
उत्तर
Diamond is the hardest, naturally occuring material known. Owing to its rigid structure, it can be used as glass cutters. Whereas graphite is a layered structure of carbon atoms and is very soft so, it cannot be used for making cutting tools.
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संबंधित प्रश्न
Write any three features and give two examples of covalent compounds
What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
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)
Draw the electron-dot structure of CO2 compound and state the type of bonding.
Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity?
One of the following contains a double bond as well as single bonds. This is:
(a) CO2
(b) O2
(c) C2H4
(d) C2H2
State the type of bonding in the following molecule.
Ammonium ion
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Explain the following term with example.
Unsaturated hydrocarbon
Explain the following term with example.
Homopolymer
Give examples for the following:
Two gaseous non polar compounds.
Explain the following:
Water is a polar covalent molecule.
What is the difference between a polar covalent compound and a non-polar covalent compound?
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
 |
Which of the following is the purest form of carbon?
What is a covalent bond?
Statement (A): Covalent compounds are bad conductors of electricity.
Reason (B): Covalent compounds contain charged particles (ions)
Show the covalent bond formation in nitrogen molecule.
