Advertisements
Advertisements
प्रश्न
Why are solids rigid?
Advertisements
उत्तर
The intermolecular forces of attraction that are present in solids are very strong. The constituent particles of solids cannot move from their positions i.e., they have fixed positions. However, they can oscillate about their mean positions. This is the reason solids are rigid.
संबंधित प्रश्न
What is the hybridisation of carbon atom in diamond and graphite?
Why do solids have a definite volume?
Classify the following as amorphous or crystalline solids:
Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.
Why is glass considered a super cooled liquid?
Define the term ‘amorphous’.
What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?
‘Stability of a crystal is reflected in the magnitude of its melting points.’ Comment. Collect melting points of solid water, ethyl alcohol, diethyl ether and methane from a data book. What can you say about the intermolecular forces between these molecules?
Why does sodium chloride on heating with sodium vapours acquire yellow colour?
Assertion: Stability of a crystal is reflected in the magnitude of its melting.
Reason: The stability of a crystal depends upon the strength of the interparticle attractive force.
Most crystals show good cleavage because their atoms, ions or molecules are ____________.
Which of the following is not a crystalline solid?
Which of the following statements about amorphous solids is incorrect?
Which of the following statement is not true about amorphous solids?
The sharp melting point of crystalline solids is due to ______.
Amorphous solids are ______.
Amorphous solid can also be called:
(i) pseudo solids
(ii) true solids
(iii) supercooled liquids
(iv) supercooled solids
Under which situations can an amorphous substance change to crystalline form?
An ionic solid AB2 isomorphous to the rutile structure (a tetragonal system with the effective number of formula units = 2) has edge lengths of the unit cell of 4Å, 4Å and 7Å. The density of the substance is ______ mg/cc. (if its formula weight is 80. The NA = 6 × 1023 and express your answer in mg/cc using four significant digits.)
