Recently Active Chemistry Questions

Al2O3 is reduced by electrolysis at low potentials and high currents.If 4*104A current is passed through molten Al2O3 for 6 hours,mass of aluminium produced.... ...

Calculate the energy required to excite one litre of hydrogen gas at 1 atm and 298K to the first excited state of atomic hydrogen. the energy of dissociation of H-H bond is 436 kJmol-1 ...

A) cassiterite 1. ruby B) corundum 2. Al2O3 C) chalcocite 3. Tin stone D) chalcopyrites 4. copper glance 5. SnO2 6. CuFeS2 ...

A sodium salt of an unknown anion when treated with MgCl2 gives white precipitate only on boiling. This anion is.. a) SO42- b) HCO3- c) CO32- d) NO3- ...

I am starting this thread where there will be all the exceptions in chemistry.... plz post here... the exceptions in chemistry u know....grow it up...it may b helpful... i m starting with a simple one....... AgCN is a sparing ...

What is the angle made by angular moment vector of an electron with z-axis? ...

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40 ml of 0.05M sesqui carbonate is titrated against 0.05MHCL . xml of hcl is used when phenophthelene is the indicator and y ml HCLis used when methyl orange is used as an indicator in two separate titrations.Hence y-x is equ ...

which solution has highest boiling point. 1.1 percent solution of C6H12O6 2.1percent solution of NaCl 3.1 percent solution of ZnSO4 4.1 percent solution of (NH2)2CO plz post substantial reason also with your answer. ...

volumetric analysis 1.6 g of pyrolusite was treated with 60 ml of normal oxalic acid and some sulphuric acid .the oxalic acid left undecomposed was made upto 250ml ,25 ml of this solution required 32ml of 0.1Npottasium perman ...

a sample of hydrochloric acid contains 20% of hydrocloride by mass .how many grams of this acid sample is necessary to completely interact with 50 g of calcium carbonate? ...

Using van der waal's equation calculate the constant 'a' when two moles oaf a gas confined in a four litre flask exerts a pressure of a11.0 atm at a temperature of 300 K . The value of b is 0.05 L/ mol. ...

*Image* on bromination will the product be a meta..or para... ...

for reversible reaction in aq soln Zn2++X-→ZnX+,Keqis greatest when X is??? a)F- b)NO3- c)ClO4- d)I- ...

wat is regiospecific, regioselective, stereospecific, stereoselective ...

calculate enthalphy of combustion of propane in KJ /mol at 298K given BE (o=o)=410 kj/mol BE(c=o)=804 BE(c-h)=410 BE(o-h)=464 BE(c-c)=345 resonance enrgy of CO@ is -143kj/mol del H(vap) (h20 ,l)=41kj /mol wat i did was BE (pr ...

Assumin that all the users hav 2008 paper on their PC s ......... IN the Comprehension on "SOLUTIONS" HOW DO DETERMINE WICH IS TO BE TAKEN AS SOLUTE annd wich as SOLVENT ehtanol or water ??? Does that depend on quantity of ea ...

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Which of the foll statements are correct? A)Entropy of isolated system increases in an irreversible process B)Entropy of isolated system remains unchanged in a reversible process C)Entropy can never decrease D)ΔSsys and ΔSs ...

after a disastrous previous q. here's Q which is quite correct and worth a try . An organic compound A on reaction with AlPO4 forms B . B on reaction with A gives C . C on reaction with mesitylene in presence of AlCl3 gives a ...

The vapour pressure of two miscible liquids A and B are 300 and 500 mm Hg respectively. In a flask10 moles of A is mixed with 12 moles of B. However as soon as B is added A starts polymerizing into a completely insoluble soli ...

A constant current flowed for 2 hours through a potassium iodide solution oxidizing the iodide ion to iodine 2I- -> I2 + 2e- At the end of the experiment, the iodine was titrated with 21.75 ml of 0.0831 M sodium thiosulpha ...

are there any basic techniques in finding the possible no. of resonating structure of a molecule??..or do we have to just remember the common ones? ...

if the radius of the octahedral void is r and the radius of the atoms in close packing is R, derive the relation b/w r and R ...

Q2 Which of the following is true for a galvanic cell? a) electrons flow from anode to cathode b) reduction occurs at anode c) oxidation occurs at cathode d) all of the above are correct Your Answer: (a) Correct Answer: (d) S ...

Q8 *Image* The relation b/w side lenth and Y batao.......... reason it too...... ...

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4) Dry bleach is done by A. O 3 B. Cl2 C. H 2O2 D. SO 2 ...

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