Which of the following is false about diamond?
Which of the following is false about diamond?
The correct options are
B It has a low melting point
C It is a good conductor of electricity
Since all the four valence shell electrons on each C-atom are used up in making four covalent bonds with other C-atom, therefore the average value of C-C bond order in diamond is one.
There is no free electron left in the diamond crystal to carry electricity. Thus, diamond is a bad conductor of electricity. Heat conductivity in non-metals is due to lattice vibrations (photons). So, when diamond is heated, thermal vibrations are rapidly transmitted through diamond, and it acts as a good conductor of heat.
It is insoluble in all solvents.
It has a high melting point. In order to break strong C-C covalent bonds present in diamond, a large amount of energy is required, hence, the melting point of diamond is very high.
Therefore, (B) and (C) are False.
B It has a low melting point
C It is a good conductor of electricity
Since all the four valence shell electrons on each C-atom are used up in making four covalent bonds with other C-atom, therefore the average value of C-C bond order in diamond is one.
There is no free electron left in the diamond crystal to carry electricity. Thus, diamond is a bad conductor of electricity. Heat conductivity in non-metals is due to lattice vibrations (photons). So, when diamond is heated, thermal vibrations are rapidly transmitted through diamond, and it acts as a good conductor of heat.
It is insoluble in all solvents.
It has a high melting point. In order to break strong C-C covalent bonds present in diamond, a large amount of energy is required, hence, the melting point of diamond is very high.
Therefore, (B) and (C) are False.
