Advertisements
Advertisements
Question
Answer the following in one or two sentences.
What are the types of particles in each of the four main classes of crystalline solids?
Solution
The type of particles in each of the four main classes of crystalline solids are:
- Ionic solids: Constituent particles are cations and anions.
- Covalent network solids: Constituent particles are atoms.
- Molecular solids: Constituent particles are monoatomic or polyatomic molecules.
- Metallic solids: Constituent particles are metallic ions in a sea of electrons.
APPEARS IN
RELATED QUESTIONS
What is the covalency of nitrogen in N2O5?
Give an example each of a molecular solid and an ionic solid.
What type of solids are electrical conductors, malleable and ductile?
Explain The basis of similarities and differences between metallic and ionic crystals.
Copper crystallises into a fcc lattice with edge length 3.61 × 10−8 cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm−3.
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.
Account for the following :
o-nitrophenol is more steam volatile than p-nitrophenol.
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?
Answer the following in brief.
Distinguish between ionic solids and molecular solids
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 ______.
A compound crystallizes in bcc structure. What is unit cell edge length if diameter of its atom is 120 pm?
Graphite and diamond are ____________.
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 ____________.
Define unit cell.
Give any three characteristics of ionic crystals.
Differentiate crystalline solids and amorphous solids.
Classify the following solid.
P4
Which of the following is an example of molecular solid?
Which among the following is NOT a polar molecular solid?
Brass is an example of ____________.
Solid X is a very hard electrical insulator in solid as well as in molten state. It melts at extremely high temperature. Solid X is a ____________.
Order of increasing melting points among H2O(s), C(s), CS2 and Sn is ____________.
What type of interaction hold the molecules together in a polar molecular solid?
Which among the following is an example of non-polar molecule?
Silicon carbide is an example of ____________.
London forces are present in ____________.
The hardest substance among the following 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 ____________.
The major binding force of diamond, silicon and quartz is ____________.
In graphite electrons are ____________.
Which one of the following forms a molecular solid when solidified?
Graphite cannot be classified as ______.
NaCl type crystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying ____________.
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
Why are liquids and gases categorised as fluids?
Inspite of long range order in the arrangement of particles why are the crystals usually not perfect?
A crystal with a ≠ b ≠ c and α = β = γ = 90° is
Who introduced the term covalent bond?
The covalent bond length is the shortest in which one of the following bonds?
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?
A reddish-pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. If on cooling water is added to the residue it turns to original colour. The substance is ______.
Which of the following is not correct?
Mention the res of the following solid:
Ice
Mention the res of the following solid:
CO2
Quartz is which type of crystal?
