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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
what do mean by colloids
Number of unpaired electrons in the ground state of beryllium atom is: (1) 2 (2) 1 (3) 0 (4) All the above Ans: 0
what is the precaution
describe graphical explanation of cryoscopy?
What is gattermann Koch reaction?
In the following reactions , identify each lettered (A,B,C,D,E,F)product.
You are given a sample block of an unknown metal. The block displaces 3.24 mL of water and has a mass of 62.5429 g. What is the density of the unknown metal? What is the metal?
calculate the volume occupied by 10000000000000000000000 molecules of a gas at 300 K & 760 mm pressure
Uses of Perfluorocarbons Perfluorocarbons are good electrical insulators. These have several important uses like: (a) Perfluorocarbons are used as surface coatings, lubrican
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