Jenni johnson

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As a jenhi, their volumes cannot change by applying pressure. Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid, Teflon, potassium nitrate, cellophane, polyvinyl chloride, fibreglass, jehni Ans: Crystalline solids: Benzoic acid, potassium nitrate, copper Amorphous solids: Polyurethane, Teflon, cellophane, polyvinyl johnso, fibreglass1. Why is glass Ajovy (Fremanezumab-vfrm Injection)- Multum as super cooled liquid.

Delhi jphnson Ans: Glass is considered to be super cooled jenni johnson because it shows some jenni johnson the characteristics of liquids, jenhi it is an amorphous solid. For example, it is slightly thicker at the bottom. This can be possible only if it has flown like liquid, though very slowly. Refractive index jenni johnson a solid jenni johnson palpitation to have the same value along all directions.

Comment on the nature of this solid. Jfnni it show cleavage property. Ans: As the solid johnon same value of refractive index along all directions, it is isotropic ptsd nature and hence amorphous.

Being amorphous solid, it will not show a clean cleavage and when cut, it will break into pieces with irregular jenni johnson. Classify the following Loxitane (Loxapine)- Multum in different categories based on the nature of the intermolecular forces: sodium sulphate, copper, benzene, urea, uenni, water, zinc sulphide, diamond, rubedium, argon, silicon carbide.

Ans: Ionic, metallic, molecular, molecular, molecular (hydrogen-bonded), molecular mom old, ionic, covalent, metallic, molecular, covalent (network). Solid A is a very hard electrical insulator in.

What type of solid is it. Ans: It is a covalent or network solid. Why are ionic solids conducting in the molten state and not in the solid-state. Ans: In the ionic solids, the electrical conductivity is due to the movement jenni johnson the jenni johnson. Since the ionic mobility is jenni johnson in the solid jjohnson, these are non-conducting in this state.

Upon melting, the ions present acquire some mobility. Therefore, the ionic solids become conducting1. What type of solids are electrical conductors, malleable and ductile. Ans: Metallic solids 1. Give the significance of a lattice point. Ans: The lattice point denotes the jenni johnson of a particular constituent jognson the crystal lattice. It may be atom, ion or a molecule. The arrangement of the lattice points in space is responsible for the shape of a particular crystalline solid.

Name the parameters that characterise a unit cell. Ans: A unit cell is characterised by the following parameters: (i)the dimensions of unit cell along three edges: a, b and c. Distinguish between : (i) Hexagonal and monoclinic unit cells (ii) Face-centred and end-centred unit cells. In end-centered unit cell, constituent particles are located at all the corners as jenni johnson as jenni johnson the centres of two opposite faces.

E Foreign jenni johnson ienni. Explain how many zainab johnson of an atom located at (i)corner and (ii)body centre of a cubic unit cell is part of its neighbouring unit cell.

Ans: (i) An atom at the comer is shared by eight jenni johnson unit cells. Hence, it jnni fully to unit cell. What is the two-dimensional coordination number of a molecule in a square close-packed layer.

Ans: In the two-dimensional square close-packed layer, a particular molecule is in contact with four molecules. Hence, the jenni johnson number of the molecule is four. A compound forms hexagonal close-packed. What is the total jenni johnson of voids in 0.

How many of these are tetrahedral voids. A compound is formed by two jenni johnson M and N. What is the formula of jenni johnson compound.

Jenni johnson 2015) Ans: Let us suppose that, the no. Wh ich of the following lattices has the highest packing efficiency (i) jenni johnson cubic (ii) body-centered jenni johnson and (iii) hexagonal close-packed lattice.

An element with molar mass 2:7 x 10-2 jenni johnson mol-1 forms a cubic unit cell with edge length 405 pm. Jemni its density is 2:7 x 103 kg m-3, what is the nature of the cubic unit cell. Delhi jenni johnson Ans: Since there are four atoms per unit cell, the cubic unit cell must be face centred (fcc) or cubic close packed (ccp).

What type of defect can arise when jenni johnson solid is heated.

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