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what is addition,substitution,rearrangement,elimination reactions?
Q. Describe Structure of Solids? Ans. Solids are different from gases and liquids because they have a fixed shape. This definite shape occurs as the individual particles w
The α -particle scattering experiment of Rutherford concluded that: (1) The nucleus is made up of protons and neutrons (2) The number of electrons is exactly equal to number
Q. What is Calcinations process? This is fie method of heating the concentrated ore in a limited supply of air to a high temperature but under the fusion temperature. In calcin
The energy of the electron in the first orbit of He + is -871.6x 10 -20 J . The energy of the electron in the first orbit of hydrogen would be : (1) -871.6 x10 -20 J
The electron density between 1s and 2s orbital is : (1) High (2) Low (3) Zero (4)None of these Ans:Zero
is vinegar has a pungent odor. is it chemical or physical property?
lanthanoids with +4 o.s act as strong oxidising agents even though it is in stable configuration f zero
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The number of neutron in tritium is : (1) 1 (2) 2 (4) 3 (4) 0 Ans: 2
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