Advertisements
Advertisements
प्रश्न
Distinguish between crystalline solids and amorsphous solids.
Advertisements
उत्तर
| Points | Crystalline solids | Amorphous solids |
| Arrangement | The constituents particles are arranged in regular order. | The constituents particles show disordered arrangement. |
| Order | Exhibit both long-range and short-range order. | Exhibit only short-range order. |
| Melting point | They have a sharp melting point. | They melt over a range of temperatures. |
| Heat of fusion | Show definite heat of fusion. | Do not have definite heat of fusion. |
| Clearage property | They undergo a clean clearage. | They cut irregularly. |
| Physical property | Show anisotropy in physical property measurements. | They are isotropic. |
| Nature | They are true solids. | They are pseudo solid or supercooled liquid. |
APPEARS IN
संबंधित प्रश्न
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 _______.
Classify the following solids into different types:
a. Ammonium phosphate
b. Brass
c. S8 molecule
d. Diamond
A compound is made up of two elements X and Y and crystallizes in bcc structure. Atoms of X are present at the corners of the cube. Atoms of Y are present at the centre of the cube. The formula of the compound is ______.
Classify the following solid:
Pb
Assertion: monoclinic sulphur is an example of a monoclinic crystal system
Reason: for a monoclinic system, a ≠ b ≠ c and α = γ = 90°, β ≠ 90°
In calcium fluoride, having the flurite structure the coordination number of Ca2+ ion and F− Ion are ____________.
Give any three characteristics of ionic crystals.
Classify the following solid.
Brass
Which of the following is an example of molecular solid?
Which among the following is NOT a polar molecular solid?
Nature of binding forces present in carbon dioxide molecules in solid state are ____________.
Which among the following is an example of non-polar molecule?
Silicon carbide is an example of ____________.
MgO has the structure of NaCl. The coordination number of the ions in MgO is ____________.
The hardest substance among the following is:
An AB2 type structure is found in ____________.
The major binding force of diamond, silicon and quartz is ____________.
Which of the following is a network solid?
Iodine molecules are held in the crystals lattice by ______.
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 is not true about the ionic solids?
Which of the following cannot be regarded as molecular solid?
(i) SiC (Silicon carbide)
(ii) AlN
(iii) Diamond
(iv) I2
Why are liquids and gases categorised as fluids?
A crystal with a ≠ b ≠ c and α = β = γ = 90° is
Graphite is a ______.
What are intermolecular forces of attraction involved in molecular crystals?
