Advertisements
Advertisements
प्रश्न
Answer the following in brief.
Distinguish between ionic solids and molecular solids
Advertisements
उत्तर
| 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
संबंधित प्रश्न
What is the covalency of nitrogen in N2O5?
What type of solids are electrical conductors, malleable and ductile?
An ionic compound crystallises in FCC type structure with ‘A’ ions at the centre of each face and ‘B’ ions occupying corners of the cube. The formula of compound is _______.
How are the crystalline solids classified?
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?
A compound crystallizes in bcc structure. What is unit cell edge length if diameter of its atom is 120 pm?
An ionic compound AxBy crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube. the correct formula of AxBy is
Solid CO2 is an example of ____________.
Classify the following solid.
Brass
If NaCl is doped with 10−2 mol percentage of strontium chloride, what is the concentration of cation vacancy?
____________ is an example of molecular crystal.
Fullerene is an example of ____________.
Which among the following is not true for crystalline solid?
Brass is an example of ____________.
Nature of binding forces present in carbon dioxide molecules in solid state are ____________.
Silicon carbide is an example of ____________.
Which of the following exists as covalent crystals in the solid state?
Which one of the following forms a molecular solid when solidified?
Which of the following is a network solid?
Graphite cannot be classified as ______.
Which of the following cannot be regarded as molecular solid?
(i) SiC (Silicon carbide)
(ii) AlN
(iii) Diamond
(iv) I2
How many chloride ions are surrounding sodium ions in sodium chloride crystal?
Which of the following cannot be regarded as molecular solid?
(i) SiC (Silicon carbide)
(ii) AlN
(iii) Diamond
(iv) I2
Which of the following exists as covalent crystals in the solid state?
Calculate the angle at which first order reflection will occurs in an X-ray spectrometer when x ~ rays of wavelength \[\ce{1.54 \overset{\circ}{A}}\] are diffracted by the atoms of a crystal given that inter planer distance is \[\ce{0.04 \overset{\circ}{A}}\]
Which of the following molecules is non-polar in nature?
Which of the following is not correct?
Graphite is a ______.
