Soul of Chemistry

 Most Probable Inorganic Chemistry Questions: (CHSE +2 Science Class 12th) [All type , Short and long] The Soul Chemistry VST - 2 (Inorganic Chemistry)              F.M: 70                       Tim e: 3 Hour Answer all questions from Section - A, ten from Section - B and three from Section - C Section - A    [1 X 10 = 10] 1.Choose correct answer a)Which of the following species is not expected to be a ligand? i)NO                        ii)NH 4 +                                iii) en                         iv)  Py b) Which of the following is an ambidentate ligand? i)NO 2 -                    ii)CH 3 COO -               iii)Cl -                            iv) SO 4 2- c) Which among the following is paramagnetic? i)Cr(CO) 6             ii)Fe(Co) 5                    iii)Fe 2 (CO) 4               iv)V(CO) 6          d) A compound of a metal ion M +x (Z =24) has a magnetic moment     BM. The number of unpaired electrons in compound is:  i)2                 

 X - Ray Diffraction, Electron Diffraction and Neutron Diffraction What is Diffraction?      Consider two friends Ram and Shyam sitting in two different rooms separated by walls and doors. Ram can listen Shyam singing though they can't see each other.     Ram and Shyam can listen to each other because sound waves undergo diffraction.       The bending (waves don't always travel in straight lines) and spreading of waves as they pass through narrow opening or pass by the edges of opaque bodies is called the diffraction. Image Credit: By Verbcatcher - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=68991367     In the above figure water waves diffract as they pass through a narrow entrance.      Diffraction  occurs only when the wavelength is closer to the size of the opening or object. Sound waves diffract easily because their wavelengths are larger and comparable  to the door opening. But the light waves having very small wavelength need very small sl

 VST on Physical Chemistry : CHSE F.M: 70           Ti me: 3 Hour Answer all questions from Section - A, ten from Section - B and three from Section - C Section - A     [1 X 10 = 10] 1.         Choose the correct answer i.      The number of octahedral voids in a hexagonal unit cells is equal to               a) 4                         b) 6                          c) 8                                   d) 12 ii.             The F - centres in crystal defect related to         a) electrons              b)  holes          c) metals                d) non  metals iii.        The amount of silver deposited by passing one faraday of current through  silver nitrate solution is (atomic mass of Ag = 108) a)       1.08g              b) 10.8g                c) 108g                  d) 2X108g iv.      The charge required for the reduction of one mole MnO 4 - to MnO 2 is: a)       1F                   b) 3F                       c) 5F                       d) 6F v.