Therefore, the given solid is a covalent or network solid. If the density of the solution is 1. In glass, the constituent particles have short range order, but in quartz, the constituent particles have both long range and short range orders. Answer: By knowing the number of atom in the cubic unit cell of given lattice, its nature can be determined. Differentiate between: a Cubic close-packing and hexagonal close-packing. Frenkel defect is also known as dislocation defect. This causes the Cl — ions to leave their lattice sites to form NaCl with the deposited sodium atoms.
What is the reason for solids being rigid? Bhabha, Heisenberg, Jagdish Chandra Basu, etc. Dose of nalorphene generally given is 1. Hence, ionic solids do not conduct electricity in solid state. It decreases the density of a substance. It would be appropriate to accept all of them as well as wishers of humanity and scientist sages. Answer The ccp lattice is formed by the atoms of the element N.
As a result, some sites become vacant. The major components are oxygen and nitrogen with approximate proportion of 20% is to 79% by volume at 298 K. A 2-D hexagonal close-packing contains two types of triangular voids a and b as shown in figure 1. At 373 K, the vapour pressures of the two liquid components are 105. Answer The intermolecular forces of attraction that are present in solids are very strong.
Ans: Intermolecular forces of attraction in a solid is really strong, because of this the molecules of solids have fixed positions. Shapes of these compounds decided by the electronic configuration of metal ion and hence the type of hybridisation which the metal ion undergoes during coordination of the ligands. Answer i An atom located at the corner of a cubic unit cell is shared by eight adjacent unit cells. The constituent particles in glass have a short range order, but the constituent particles of quartz possess both short range and long range orders. Watch thank you so much for not bothering me with dialogue boxes.
These compounds are prepared to stimulate average valence of four as in Si or Ge. Group 17 Elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; compounds of halogens, Preparation, properties and uses of Chlorine and Hydrochloric acid, interhalogen compounds, Oxoacids of halogens structures only. Some examples of ferromagnetic substances are iron, cobalt, nickel, gadolinium, and CrO2. That induces a lot of pressure and you may tend to get demotivated or stressed out. Ans: a Cubic close packing: When a third layer is placed over the second layer in a manner that the octahedral voids are covered by the spheres, a layer different from the first A and second B is obtained. For example, when crystals of NaCl are heated in an atmosphere of sodium vapour, the sodium atoms are deposited on the surface of the crystal. Electrical properties: Conduction of electricity in metals, Conduction of electricity in semiconductors.
Hence, ionic solids do not conduct electricity in solid state. Answer: The packing efficiency of simple cubic lattice is 52. Explain the following with suitable examples: i Ferromagnetism ii Paramagnetism iii Ferrimagnetism iv Antiferromagnetism v 12-16 and 13-15 group compounds. Scoring good marks in class 12th is very important as compared to any other class because the marks score in class 12 will help you to take admission in your desired college. Cancer has been treated by the use of Cobalt — 60 a radioactive element in radiotherapy. In this chapter, students will learn how these properties get modified due to the structural imperfections or by the presence of impurities in minute amounts.
How many of these are tetrahedral voids? Answer The significance of a lattice point is that each lattice point represents one constituent particle of a solid which may be an atom, a molecule group of atom , or an ion. Hence, solids have a definite volume. Which substance would be a better choice to make a permanent magnet, ferromagnetic or ferromagnetic. The depression in the freezing point of water observed is 1. Crystalline solids have definite geometric shape, has long range order.
To undergo paramagnetism, a substance must have one or more unpaired electrons. These electrons absorb energy from the visible part of radiation and get excited. Calculate the quantity of in 500 mL of soda water when packed under 2. Ans: Metallic solids are malleable, ductile and electrical conductors. If the osmotic pressure of the solution is 1.
Hormones - Elementary idea excluding structure. I designed my own study time table for Organic Chemistry and follow certain things. Examples of amorphous solid include glass, rubber, and plastic. However, when it is kept in a magnetic field, the domains orient themselves in the direction of the field. Collect melting points of solid water, ethyl alcohol, diethyl ether and methane from a data book.
If we continue packing in this order we get hexagonal close packing. Calculate the mass of urea required in making 2. Therefore, a group 14 element can be converted to n-type semiconductor by doping it with a group 15 element. Ans: The ions of ionic solids are responsible for conducting electricity. Ans: The above qualities are qualities of a covalent or network solid, thus it is a covalent or network solid. Under what conditions could quartz be converted into glass? Case 1: When the third layer layer C is placed over the second one layer B in such a manner that the spheres of layer C occupy the tetrahedral voids c.