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Q. Describe Lime-soda method for softening of hard water. Discuss the advantages of the process and the chemistry involved in it.
If the atomic weight of an element is 23 times that of the lightest element and it has 11 protons, then it contains : (1)11 protons, 23 neutrons, 11 electrons (2)11 protons,
Q. Significant figures of the number of digits? Significant figures of the number of digits reported in a measurement signify how precise the measurement is. The further di
Q.give characterstics of matter?
What are hormones? State the function of the following hormones: (a) Testosterone (b) Oxytocin
0.45 g of anhydrous oxalic acid is reacted with 50 ml of KMNO4 . Then normality of KMnO4 is??
which is the main postulate of bohr''s model of atom
An excess of NaOH solution was added to 100 ml of a ferric chloride solution. This caused the precipitation of 1.425 gram of Fe(OH)3 . calculate the normality of ferric chloride so
How is a peptide bond made through dehydration, and show it in a chemical equation, please.
hardness of borewell water is less than that of seawater
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