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प्रश्न
Classify the following solid:
Pb
पर्याय
Molecular solid
Ionic solid
Covalent solid
Metallic solid
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उत्तर
Metallic solid
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संबंधित प्रश्न
Give an example each of a molecular solid and an ionic solid.
Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?
Ionic solids conduct electricity in molten state but not in solid state. Explain
Explain ionic solids are hard and brittle.
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 _______.
Distinguish between crystalline solids and amorsphous solids.
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?
Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.
Solid CO2 is an example of ____________.
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.
Iodine
Lithium crystallizes into body centered cubic structure. What is the radius of lithium if edge length of it's unit cell is 351 pm?
Brass is an example of ____________.
Nature of binding forces present in carbon dioxide molecules in solid state are ____________.
Order of increasing melting points among H2O(s), C(s), CS2 and Sn is ____________.
Ionization enthalpy is lowest in ____________.
MgO has the structure of NaCl. The coordination number of the ions in MgO is ____________.
An AB2 type structure is found in ____________.
The compound, found in nature in gas phase but ionic in solid state is ____________.
An example of a covalent crystalline solid is ____________.
Which of the following is a network solid?
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.
Which of the following cannot be regarded as molecular solid?
(i) SiC (Silicon carbide)
(ii) AlN
(iii) Diamond
(iv) I2
Inspite of long range order in the arrangement of particles why are the crystals usually not perfect?
The major binding force in diamond, silicon and quartz is ______.
Graphite is a ______.
What are intermolecular forces of attraction involved in molecular crystals?
