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short note on vulcanization of rubber.
briefly explain laws of atoms with example
Q. Atomic mass of an element? The number at the bottom of every square in the periodic table is the atomic mass of that element in amu. A scan of the periodic table will withou
is relation a=2r+ + 2r- correct for bcc
hybridisation of o in boric acid
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
assignment
Why a covalent bond is directional? Covalent bond is formed as a result of pairing of two electrons in atomic orbitals of two atoms. Bond then must lie along the direction of
Preparation of cycloalkane by perkins method
Number of unpaired electrons in 1s 2 2s 2 2p 3 is: (1) 2 (2) 0 (3) 3 (4) 1 Ans: 3
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