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wat is mother liquor??? i saw in preparation of Mohr Salt but dint understand what it is?? ...
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among the following substituted silanes the one which will give rise to cross linked silicon polymer on hydrolysis a)R4Si b)RSiCl3 c)R2Sicl2 d)R3sicl ...
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Ionisation energy-It is the energy required to remove an electron from an isolated gaseous atom. Here,what is the meaning of "isolated gaseous atom"?????? ...
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Is experimental chemistry there in iitjee......if yes, from where can we prepare for it. Are the Practical books for CBSE like Comprehensive, etc enough ? ...
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why decrease in ionic character ,decrease in basic character in case of transition elements ...
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1)Copper oxide from Copper sulphate 2)Ferrous sulphate from Mohr's Salt 3)Anhydrous ZnCl2 from white vitrol ...
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Who is giving BT part test on 25th?? ...
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"when an atom with a filled valence shell and 1 or more lone pairs is bonded to an atom with an incomplete valence shell or a valence shell that can become incomplete by electron shifts , there is a tendency for the lone pair ...
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Can anyone please explain the following processes for manufacture of steel in simple lines. [1] (1) Bessemer Process (2) Open Hearth Process (3) L.D. Process ...
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Statement 1-Ag maybe prepared from Ag coins by treating them with HNO3 adn then with HCl to get AgCl but not directly treated with HCl Statement 2-HCl is not a good oxidising agent. ...
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A sample containing H3PO4 and P4O10 is labelled in the analogous manner as oleum. The mass of P4O10 in a sample labelled as 127%, would be ? ...
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Why is Chalcocite roasted and not calcined in the recovery of copper ? ...
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1.. *Image* ...
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*Image* Explain All e conceps , ...
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the heat of atomiza5ion is the change in enthalpy accompanying the conversion of 1 mole of an element or a compound in its most stable state at 298 K and 1 atmosphere into free atoms. Use Slater's rule to rationalize the foll ...
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What things do we need to keep in mind while selecting the coating metal for galvanisation? ...
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The odour of skunks is caused by chemical compounds called thiols. these compounds of which butanethiol (C4H10S) is a represntative example can be deodourised by reaction with household bleach (NaOCl) accorbing to the equatio ...
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when will the study materiaaaaaaal be posted?? ...
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A weak base BOH of concentration 0.02 mole/litre has a pH value of 10.45.If 100 ml of the base is mixed with 10 ml of 0.1 M HCl, what will be the pH of the mixture? ...
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1. Two ...
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1. Two sets of four quantum no. of an electron are written below a.( n=4, l=3, s=1/2). ...
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10 ml of a mixture of Na2CO3 and NaHCO3 is titarted with 0.1 M H2SO4 solution. When phenolphthalein is used, it is observed that if 2.5 ml acid solution is added then the solution becomes colourless. After this when one drop ...
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I have read somewhere.. the maximum covalecy that an atom can show is the total no. of orbitals it has. Weather filled or unfilled... And so in case of Boron its 1 + 3 = 4 how can we find the max. covalency of an element like ...
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A2 and B2 are two diatomic molecules with bond energies of A-A and B-B bonds as x and y respectively.If the bond energy of the molecule A-B formed up from A2 and B2 is z.Then,the resonance energy of molecules A-B will be A.(รข ...