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A solid substance with a mass of 200g is at its melting temperature in a calorimeter. While the substance changes from a solid to a liquid at the same temperature, the 400-gram mas
The number of electrons involved in the bond formation of N 2 molecule : (1) 2 (2) 4 (3) 6 (4) 10 Ans: 6
Explain relative electronegativities An analysis of relative electronegativities would suggest that, because C is slightly more electronegative than H, a important amount of th
If hydrogen atom is in an energy level represented by n=4,how many spectral lines are possible in its emission spectrum? Solution) There is a formula for this i.e [ (n 2 - n 1
Q. What are ion selective membranes used in electro dialysis of brackish water. Give examples. Ans. Electro dialysis for brackish water: The ion selective membranes are use
priming and foaming.
0.45 g of anhydrous oxalic acid is reacted with 50 ml of KMNO4 . Then normality of KMnO4 is??
Calculate the combustion energies for the burning of 1 mol of propane and butane. It can be supposed that all reactants and products are obtained under standard conditions.
The number of electrons which can be accommodated in an orbital is: (1) One (2) Two (3) Three (4) Four Ans: Two
difference between ion and free radicals ?
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