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An element has the electronic configuration 1s 2 , 2s 2, 2p 6 , 3s 2 , 3p 2 . Its valency electrons are: (1) 6 (2) 2 (3) 3 (4)4 Ans: 4
Talcum powder: Talcum powder is utilized to decrease impatience of the skin. Talcum powders such as face powders comprise talc (Mg 3 (OH) 2 Si 4 O 10 ) Chalk, zinc stearate an
Claisen-Schmidt Reaction: In this exercise, you will make 2,2,6-trimethyl-5-phenylheptan-3-one by a reaction sequence which involves a Claisen-Schmidt Reaction followed by th
Beginning in the early nineteenth century, scientists developed models to explain the structure of the atom. As more information was discovered about the nature of the subatomic pa
Which of the following electronic configuration is not possible according to Hund's rule: (1) 1s 2 2s 2 (2) 1s 2 2s 1 (3) 1s 2
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
experiment with diagram
preparation of soyabin milk
Q. Define Food spoilage? Food spoilage is a major concern of all people. Spoilage by growth of bacteria, yeasts and moulds limits the time that the food can be stored and still
how can we prepare adernaline from cyclohexane
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