Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 12 TN Board chapter 6 - Solid State [Latest edition]

Graphite and diamond are ____________.

An ionic compound A_xB_y 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 A_xB_y is

The ratio of close packed atoms to tetrahedral hole in cubic packing 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 ____________.

The number of unit cells in 8 gm of an element X (atomic mass 40) which crystallizes in bcc pattern is (N_A is the Avogadro number)

In a solid atom M occupies ccp lattice and `(1/3)` of tetrahedral voids are occupied by atom N. find the formula of solid formed by M and N.

The ionic radii of A⁺ and B⁻ are 0.98 × 10⁻¹⁰ m and 1.81 × 10⁻¹⁰ m. the coordination number of each ion in AB is

CsCl has bcc arrangement, its unit cell edge length is 400 pm, it's inter atomic distance is

A solid compound XY has NaCl structure. if the radius of the cation is 100 pm, the radius of the anion will be

The vacant space in bcc lattice unit cell is ____________.

The radius of an atom is 300 pm, if it crystallizes in a face centered cubic lattice, the length of the edge of the unit cell is ____________.

The fraction of total volume occupied by the atoms in a simple cubic is

The yellow colour in NaCl crystal is due to ____________.

If ‘a’ stands for the edge length of the cubic system; sc, bcc, and fcc. Then the ratio of radii of spheres in these systems will be respectively.

If ‘a’ is the length of the side of the cube, the distance between the body centered atom and one corner atom in the cube will be

Potassium has a bcc structure with nearest neighbor distance 4.52 A⁰. its atomic weight is 39. its density will be

Schottky defect in a crystal is observed when

The cation leaves its normal position in the crystal and moves to some interstitial position, the defect in the crystal is known as ____________.

Assertion: due to Frenkel defect, density of the crystalline solid decreases.

Reason: in Frenkel defect cation and anion leaves the crystal.

The crystal with a metal deficiency defect is ____________.

A two-dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y respectively. the simplest formula for the compound based on the unit cell from the pattern is

Define unit cell.

Give any three characteristics of ionic crystals.

Differentiate crystalline solids and amorphous solids.

Classify the following solid.

P₄

Classify the following solid.

Brass

Classify the following solid.

Diamond

Classify the following solid.

NaCl

Classify the following solid.

Iodine

Explain briefly seven types of unit cells.

Distinguish between hexagonal close packing and cubic close packing. 

Distinguish tetrahedral and octahedral voids.

What are point defects?

Explain Schottky defect.

Write short note on metal excess and metal deficiency defect with an example.

Calculate the number of atoms in a fcc unit cell.

Explain AAAA and ABABA and ABCABC type of three dimensional packing with the help of neat diagram.

Why ionic crystals are hard and brittle?

Calculate the percentage efficiency of packing in the case of body centered cubic crystal.

What is the two dimensional coordination number of a molecule in square close packed layer?

What is meant by the term “coordination number”?

What is the coordination number of atoms in a bcc structure?

An element has bcc structure with a cell edge of 288 pm. the density of the element is 7.2 g cm⁻³. how many atoms are present in 208 g of the element.

Aluminium crystallizes in a cubic close packed structure. Its metallic radius is 125 pm. calculate the edge length of the unit cell.

If NaCl is doped with 10⁻² mol percentage of strontium chloride, what is the concentration of cation vacancy?

KF crystallizes in fcc structure like sodium chloride. calculate the distance between K⁺ and F⁻ in KF.
(Given: density of KF is 2.48 g cm⁻³)

An atom crystallizes in fcc crystal lattice and has a density of 10 g cm⁻³ with unit cell edge length of 100 pm. calculate the number of atoms present in 1 g of crystal.

Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?

Sodium metal crystallizes in bcc structure with the edge length of the unit cell 4.3 × 10⁻⁸ cm. calculate the radius of a sodium atom.

Write a note on Frenkel defect.