Soul of Chemistry

      Short questions on Solid State 1. Solid state refers to the physical state of the matter with a rigid structure. 2. Solids have closely packed atoms or molecules or ions. 3.       Solid state physics studies the properties and behavior of solids. 4.       Crystalline solids have an ordered atomic arrangement. 5.       Amorphous solids lack long-range order. 6.       Unit cell is the smallest repeating unit in a crystal lattice. 7.       Bravais lattices are the 14 possible lattice arrangements. 8.       Miller indices describe crystallographic planes and directions. 9.       Ionic bonding involves the transfer of electrons between atoms. 10.   Covalent bonding results from electron sharing between atoms. 11.   Metallic bonding occurs in metals with delocalized electrons. 12.   Semiconductors have a valence band and a conduction band. 13.   Band gap is the energy gap between valence and conduction bands. 14.   Intrinsic semiconductors are pure semicondu

 VST on CHSE - Class XII If you are preparing to appear in Council of higher secondary education, Odisha, you must at least look into these super selective questions on the topics Electrochemistry, Chemical kinetics, Alkyl and Aryl halides, Alcohol Phenols and Ethers, Aldehyde, Ketone and Carboxylic acids. 1.Answer all questions. [1X7=7] i.In which order reaction the unit of rate and rate constant is same? a.Zero                  b.First                   c.fractional                   d.second ii.Which of the following can affect the value of rate constant. a.concentration     b.temperature        c.catalyst          d.both b. and c. iii.The rate constant of a first order reaction, K = 1050 exp (-10) at 100K. The activation energy in J mol -1 is: a.1050                        b.10                         c.8314                  d.100 iv.3 Faradays of electricity will deposit what amount of Aluminum (in gram) from molten Al 2 O 3 . a.3               b.27