Advertisements
Advertisements
Question
Answer the following in brief.
Distinguish between ionic solids and molecular solids
Advertisements
Solution
| Ionic solids | Molecular solids |
| 1. The constituent particles are charged ions (cations and anions). | 1. The constituent particles are monoatomic or polyatomic molecules |
| 2. The constituent particles are held by the electrostatic force of attraction between oppositely charged ions. | 2. The constituent particles are held by intermolecular forces of attractions such as London forces, dipole-dipole forces and/or hydrogen bonds. |
| 3. They are hard and brittle. | 3. They are soft. |
| 4. They have high melting points. | 4. They have low melting points. |
| 5. They are nonconductors of electricity in solid-state. However, they are good conductors when melted or dissolved in water. | 5. They are poor conductors of electricity. |
| 6. e.g. NaCl, CaF2, etc. | 6. Ice, benzoic acid, etc. |
APPEARS IN
RELATED QUESTIONS
Give an example each of a molecular solid and an ionic solid.
What type of solids are electrical conductors, malleable and ductile?
Answer the following in one or two sentences.
A solid is hard, brittle and electrically nonconductor. Its melt conducts electricity. What type of solid is it?
Classify the following solid:
Pb
Define unit cell.
Give any three characteristics of ionic crystals.
Classify the following solid.
Diamond
If NaCl is doped with 10−2 mol percentage of strontium chloride, what is the concentration of cation vacancy?
Which of the following is TRUE about molecular solids?
____________ is an example of molecular crystal.
Dry ice is an example of ____________.
Lithium crystallizes into body centered cubic structure. What is the radius of lithium if edge length of it's unit cell is 351 pm?
Which among the following is an example of network solid?
What type of interaction hold the molecules together in a polar molecular solid?
Which among the following is an example of non-polar molecule?
MgO has the structure of NaCl. The coordination number of the ions in MgO is ____________.
The hardest substance among the following is:
The compound, found in nature in gas phase but ionic in solid state is ____________.
An example of a covalent crystalline solid is ____________.
Which one of the following forms a molecular solid when solidified?
How many chloride ions are surrounding sodium ions in sodium chloride crystal?
An excess of potassium ions makes KCl crystals appear violet or lilac in colour since:
(i) some of the anionic sites are occupied by an unpaired electron.
(ii) some of the anionic sites are occupied by a pair of electrons.
(iii) there are vacancies at some anionic sites.
(iv) F-centres are created which impart colour to the crystals.
The covalent bond length is the shortest in which one of the following bonds?
The major binding force in diamond, silicon and quartz is ______.
Which of the following molecules is non-polar in nature?
Among the following which is the best description of water in the solid phase?
Which of the following is not correct?
Mention the res of the following solid:
Ice
