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describe exothermic and endothermic reactions with examples.
Electrovalent compounds are: (1) Good conductor of electricity (2) Polar in nature (3) Low M.P. and low B.P. (4) Easily available Ans: Polar in nature
The ratio between the neutrons in C and Si with respect to atomic masses 12 and 28 is: (1) 2 : 3 (2) 3 : 2 (3) 3 : 7 (4) 7 : 3 Ans: 3 : 7
What is the packet of energy called: (1) Electron (2) Photon (3) Positron (4)Proton Ans: Photon
how many process there are to extracte copper from copperpyrites/
Born Haber cycle with example as sodium chloride
Because Mg is metal. We know from the properties of the metal it will mallable, ductile, and good conductor for electricity. So, for better conduction the conduction band must over
the density of a gas ''A'' is twice that of gas ''B'' at same temperature.The molecular mass of ''B'' is thrice that of ''A'' .the ratio of the pressures acting on A andB
a) Write a balanced equation of the formation of dimethyl carbonate by the reaction of methanol with carbon dioxide. How can dimethyl carbonate form if phosgene is the reactant?
The quantum number 'm' of a free gaseous atom is associated with : (1) The effective volume of the orbital (2) The shape of the orbital (3) The spatial orientation of the
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