f block elements, Chemistry

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why f elememnts kept sepertaly in periodic table

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General tests on benzoic acid, General Tests on Benzoic Acid (a) It dis...

General Tests on Benzoic Acid (a) It dissolves in hot water but separates out in the form of white shining flakes on cooling. (b) Benzoic Acid evolves CO 2 with sodium bica

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In hydrogen spectrum the different lines of Lyman series are present is : (1 )UV field (2) IR field (3) Visible field (4) Far IR field Ans:  UV field

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Q. Show Egg foams application in food preparation? Foams need to be stable if they are to have a role in food preparation. Stability is enhanced if the surface tension is low,

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Test of proteins - Nitroprusside test Nitroprusside test : Proteins consisting of -SH group give this test. While sodium nitroprusside solution is added to proteins comprising

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Some important types of electrodes which are frequently used in electrochemical cells are described as follows:     Metal-metal ion electrode: such type of electrodes includes a

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How many electrons can be accommodated in a sub-shell for which n=3, l=1: (1) 8        (2) 6        (3) 18      (4) 32 Ans: 6

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Methods of showing concentrations of solutions The concentration of a solution can be provided in various ways. (A) Percent by mass (B) Molarity (C) molality (D) Mo

Effects of substituents on the acidity of phenols, Effects of substituents ...

Effects of substituents on the acidity of phenols: Existence of electron attracting group, (for example -NO 2 , -X, - NR + 3 ,  -CN, -CHO, -COOH) on the benzene ring increases

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