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Chromatography - Purification of organic compounds
This is a modern technique employed for the separation of mixtures into its components, purification of compounds and as well to test the purity of elements. The name chromatography is related along with the Greek word 'chroma' meaning colour and 'graphy' for writing as the technique was first employed for the separation of coloured substances found in plants. This technique was described by Tswett in 1906.
Maximum electrons in a d -orbital are: (1) 2 (2) 10 (3) 6 (4) 14 Ans: 10
Wet test for basic radicals
This type of cells becomes dead over a period of time and the chemical reaction stops. They cannot be revitalized or used again. Some ordinary examples are dry cell, mercury cell,
Molten sodium chloride conducts electricity due to the presence of: (1) Free electrons (2) Free ions (3) Free molecules (4) Atoms of sodium and chlorine Ans: Free
There are two type of vitamines 1.water soluble 2.fat soluble water soluble vitamines are B complex and C vitamines vitamine c is soluble in water so dissolve in water and ca
role of chemistry in our daily life
assignment
list the advantage and disadvantage teaching methods in chemistry
easy ways to find basic radicals in qualitative analysis
An aqueous solution has a hydroxyl concentration of 1.75 x 10^-7mol/L. Find the concentration of hydrogen ions in this solution.
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