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Classification of polymers
Classification lies on source of availability: They are categorized as
(a) Natural polymers
(b) Synthetic polymers
(c) Semi-synthetic polymers
The orbital angular momentum of an electron in 2s -orbital is: (1) 1/2 h/ 2Π (2) h/ 2Π (3) √2 h/ 2 Π (4) Zero Ans
An element have atomic weight 40 and it's electronic configuration is 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 . Then its atomic number and number of neutrons will be: (1) 18 and 22
acs exam
NaH + H2O ->
Filter pump Some skill is needed to construct the ordinary glass filter pump, but it is possible to contrive one from glass tubing and good corks. The action of the pump depend
Borosilicate glass: in this boric anhydride is used in place of lime. This glass generally contains 75-81% silica, 10-13.5% B 2 O 3 , 4.5-6% Na 2 O and 2-5% Al 2 O 3 . Sometimes Z
explain the law of chemical combination
Hydrocaborns
positive standard electrode potential and negetive standard electrod potential
why f elememnts kept sepertaly in periodic table
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