Borax (Na2B4O7.10H2O)
Borax occurs naturally as tincal (contains about 55% borax) in certain inland lakes of India, Tibet and California (U.S.A.). ..
Problem
7. How are industrial effluents from paper mills treate..
Example
Cl - 17 : 2, 8, 7 Valency = 8 - Number of valence electrons = 8 - 7 ..
Representative Periodic Table for 8 Groups upto Calcium (Atomic Number -20)
Representative elements are those elements whose inner shells are complete and whose outer shell (valency shell) has 1 to 7 electrons. They are also called normal elemen..
Example: 5
Calculate the number of moles of nitrogen in 7g of nitroge..
Proportions of Ingredients
Alkali 1 part Water 7 parts Starch 1 pa..
Proportions of Ingredients
Alkali 1 part Water 7 parts Starch 1 pa..
Preparation of a Mixture of Iron and Sulphur
Take about 7g of freshly powdered iron, and a little more than 4 g of sulphur. Mix them well. However well it may be mixed, the iron and sulphur particles can be seen separately. Also the above said properties of both iron and sulphur will still be exhibited by this mixtu..
Example: 18
A hydrocarbon was found to contain the following percentage composition. C = 92.3%, H = 7.69%. Calculate its empirical formula (C=12, H=1..
Problems
7. Identify the atoms which do not obey the octet rule in the following compounds and draw their Lewis structures? SO 2 or SF ..
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