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Q. A sample of water analysis was found to contain temporary magnesium hardness 25 mg/L. Permanent magnesium chloride hardness 15 mg/L and permanent calcium sulphate hardness 20
The word "cereal" is derived from the name of the Roman grain or harvest goddess, Ceres. Cereals are the seeds of the grass family. These are the complex carbohydrates and consist
NaOH + K2Cr2O7 ---> HCo + NaHCO3 ---> HCo + NaOH ---> CuSo4 + NaOH ---> CH3COOH + NaHCO3 ---> PbNO3 + KI --->
Given that ?H°298 for the reaction is -92.2 kJ mol-1, which is larger, the total bond dissociation energy of the reactants or the total bond dissociation energy of the products?
The radius of first Bohr's orbit for hydrogen is 0.53 Å. The radius of third Bohr's orbit would be: (1) 0.79 Å (2) 1.59 Å (3) 3.18 Å (4)4.77 Å
freon preparation
project on p block..
why is density of interstitial compounds less than that of parent metal ?
Which of the following explains the sequence of filling the electrons in different shells: (1) Hund's rule (2) Octet rule (3) Aufbau principle (4) All of these Ans
How is chemical reaction reversible and irreversible?
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