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20ml of water sample requires 15ml of 0.1mg/l sodium carbonate using phenolphthalein indicator. state the type of acidity and calculate the acidity
wht is the strucutre of benzene?
Which type of compounds show high melting and boiling points: (1) Electrovalent compounds (2) Covalent compounds (3) Coordinate compounds (4) All the three types of co
Explain meso stereoisomer a) For a molecule to have a meso stereoisomer, it must have more than single asymmetric atom, and it must be divisible into constitutionally identical
a solid weak acid i weighed, dissolved in water and diluted to exactly 50ml. 25ml of the solution is taken out and is tittrated to a natural endpoin with .10M NaOH. The titrated po
Uncertainty in position of a 0.25 g particle is 10 -5 . Uncertainty of velocity ( h = 6.6 x 10 -34 Js) is: (1) 1.2 x 10 34 (2) 2.1 x 10 -29 (3) 1.6 x 1
Which of the following has more unpaired d-electrons: (1) Zn + (2) Fe 2+ (3) N 3+ (4) Cu + An
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
Equivalent weight of Ca in Ca3(PO4)2 is
I don''t understand the concept of normality and gram equivalent
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