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why melting point decreases from antimony to bismuth ??????? plz give valid reason............. ...
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Do we need to learn the bond lengths of various compounds for JEE? ...
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why porous mass can easily be reduced to metallic state?????????? ...
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what is meant by this "collectrors enhance non-wettability of the the mineral particles????????????????????????? ...
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which is a gud book for inorganic for iitjee? ...
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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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'A' is an inorganic iodide. A + KOH → gas + aq. soln the gas is C. C is heated to give an oxide of N2 + H2O. Find A,B,C. ...
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what is the use of stabilisers????????? ...
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why in roasting heating is done below melting point and in calcination above melting point ???????????????? ...
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does cuprous pyrite ore give iron ........ifound these in O.P AGGARWAL ...
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why the reverberatory furnace can be used for both oxidation and reduction??????????????????????? ...
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Q1.In which case purity of the substance is 100%? (a)1 mol of CaCO3 gave 11.2 L CO2 (b)1 mol of MgCO3 gave 40g MgO (c)1 mol of NaHCO3 gave 4 g H2O (d)1 mol of Ca(HCO3)2 gave 1 mol CO2 Q.2 M2+ is isoelectronic of SO2 and has ( ...
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.what is a chelate?is [Fe(SCN)]3- a chelate?in how many isomeric forms can [Fe(SCN)]3- exist? ...
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these r the question i faced in bitsat 2009 on yesterday 1. wat is EDTA A hexadentate ligand B bidentate ,, C tetradentate ,, D pentadetate ,, i mark A 2.wat is the denticity of oxalate A hexadentate B bidentate C tetradentat ...
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PbO2+HNO3 will liberate a)NO2 b)O2 c)N2 d)N2O ...
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I did a q yeaterday --- which is thermodynamically the most stable allotrope of carbon ? a)graphite b)diamond c)fullerene d) soot I marked b but that was not the ans ... Isnt the solution wrong? ...
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if a non-metal is addes to the interstial sites of a metal then the matal becomes 1. softer 2. less tensile 3. less malleable 4. more tensile ...
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is cojugate base possible for [Al(H2O)6] if yes how???? ...
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What is the coordination no. of Al in AlCl3 ...
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anybody having any questions related to dyes .. plz post it here .. it can help us all ! ...
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ques out the world for me!!! 1. Sulphates of which of the following donot form alums 1. Cs 2. K 3. Li 4. Na Which of the following compounds decompose on heating similar 2 LiNO3 1.Be(NO3)2 2. Mg(NO3)2 3. Sr(NO3)2 4. All of th ...
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Assertion & reason statement1:lattice energy of AlCl3 is more than NaCl statement2:AlCl3 is less ionic than NaCl ...
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what is the relative strength of the following acids: HClO4, HNO3, H2SO4, HCl ...
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Q1Arrange the following in incresing lattice energy- (1)BeCO3,MbCO3,CaCO3,SrCO3,BaCO3 (2)Li2CO3,Na2CO3,K2CO3 (3)LiCl,NaCl,KCl (4)LiF,LiBr,LiI Q2The lattice energy of CaO is -3460kJ/mol ;the lattice energy of K2O is -2240kJ/mo ...
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please give a detailed reasoning to your solution:: [CoCl4(H2O)2]2- + (edta)4- = [Co(edta)]2- + 4Cl- +2 H2O ALL ARE aquous. if H2o is added in above equilibrium(initially it is in equilibrium) what will happen? ...
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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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how many unit cells are present in a cube shaped ideal crystral of NaCl of mass 1g ...
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paper-1 question O2 has to matched with p)paramagnetic q)undergoes oxidation r)undergoes reduction s) bond order greater or equal to 2 t) mixing of s & p orbital i matched with all but i saw in brilliant sol. it has not match ...