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Q. Objectives of transition elements of the f-block? After studying this unit you should be able to: distinguish between transition and inner-transition elements, d
Q. Describe about groups or families in periodic table? Every element may be represented by a one or two letter symbol. In the middle of nineteenth century a Russian chemist Dm
Indicate the nature of bonding in CCl 4 and CaH 2 : (1) Covalent in Ccl 4 and electrovalent in Cah 2 (2) Electrovalent in both CCl and CaH 2 (3) Covalent in bot
sn1 and sn2 reactions
why HOH is not harmful to our body but Phenol is?
The quantum numbers for the outermost electron of an element are given below as n= 1, l=0, m=0, s = 1/2 . The atoms is: (1) Lithium (2) Beryllium (3) Hydrogen (4)
What is the difference among multimolecular and macromolecular colloids? Give one example of each type. How are associated colloids dissimilar from these two types of colloids?
Cross linked polymers : 1. These are polymers where monomers unit are crosslinked together to make a three dimensional network polymers. 2. These kind of polymers are hard,
Charectaristic of covalent bond
why does sulfuric acid get hotter when you neutralise it
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