# Recently Active Physical Chemistry Questions

• In a tyre of "Ferrari" car of Mr. Obama, a tube having a volume of 12.3 litres is filled with air at a pressure of 4 atm at 300 K. Due to travelling, the temperature of the tube and air inside it raised to 360 K and pressure ...
replied2011-03-29 01:50:47
• 2.6 g of an element X is reacted with an aqueous solution containing NaOH and NaNO3 to yield Na2XO2 and NH3. NH3 thus liberated is absorbed in 100 mL of 0.11 M H2SO4. The excess acid required 48 mL of 0.25M NaOH for complete ...
• Why at the boiling point..the vapor pressure equals to atmospheric pressure? ...
replied2011-03-25 08:08:24
• how to find the work done in the two processes? plz help *Image* ...
replied2011-03-16 02:06:00
• Q:=> *Image* The tube contains 10 cm of air column and 4 cm of mercury column each with 4 cm of water column between them as shown above. Now the tube is made vertical. Now find the the length of air column/water column? Q ...
replied2011-03-13 01:55:21
• *Image* i have solved this problem and got same answer as given but in intermediate steps my approach was different: i took Pbottom of drop=Ptop of drop+pgh in book they took Ptop=Pbottom of drop+pgh which is correct??? ...
replied2011-03-13 00:54:12
• The number of neutrons emitted when 235]U92 undergoes controlled nuclear fission to 142Xe54 and 90Sr38 is ?? why is the ans given by JEE 4??how can it be 4?? ...
replied2011-03-09 08:09:15
• The heat of combustion of acetylene is 312 kcal . If heat of formation of CO2 and H2O are 94.38 and 68.38 kcal respectively , calculate C triple bond C energy . Given that heat of atomization of C and H are 150 and 51.5 kcal ...
replied2011-03-08 05:53:14
• For dissociation of PCl5 if relative molar mass is M and total pressure at equilibrium is p at a density d and temperature d,find an expression for degree of dissociation.If vapor density has a value 62 when temperature is 23 ...
replied2011-03-06 01:15:38
• though not mentioned in syllabus..jee 2000,jee 2004 conatined problems based on these formulas n optics, the Beerâ€“Lambert law, also known as Beer's law or the Lambertâ€“Beer law or the Beerâ€“Lambertâ€“Bouguer law relates t ...
replied2011-03-06 01:02:33
• plz guide me on how to solve the questions of this spirit! 7N14+alpha particleâ†’ ? plz guide me on how to solve the problems of this type[21] ...
replied2011-03-05 22:23:10
• A desiccator of internal volume of 1 litre and containing nitrogen at 1 atm pressure is partially evacuated to a final pressureof 7.6 mm of Hg,while the temperature remains constant.what is volume of gas at this stage? ...
replied2011-03-05 09:19:32
• *Image* *Image* *Image* ...
replied2011-03-05 06:57:41
• *Image* PLS BALANCE THE EQ. BY ION OR OXIDATION NUMBER METHOD ...
replied2011-03-04 23:28:22
• In phosgene gas reaction at 400Â°C,initial pressures are pCO=342mm pCl2=32mm.total pressure at equilibrium is 440 mm. Calculate percentage dissociation of phosgene at 400Â°c at 1 atm! ...
replied2011-03-02 07:48:57
• what is speific reaction rate? ...
replied2011-03-02 05:13:28
• In a flask following reaction is in equilibrium NH4Cl(s)=NH3(g)+HCl(g) delta H=176 KJ/mol How is mass of NH3 affected by each of these disturbances 1.Decrease in temp 2.NH3 is added My answer: 1.Decrease 2.Decrease Textbook a ...
replied2011-03-01 17:25:11
• *Image* well guys my argument here is this PV/2n =constant(=0.5RT) at a given temperature. so,D0/Deq =1 Now where am i wrong??? ...
• manish sir plz tell why this concept is not applicable here CONCEPT:for a compound AxBy: x moles of A=y moles of B PROBLEM:0.75 moles of A4 +2.0 moles of O2 completely react to form a single compound!find the empirical formul ...
replied2011-03-01 00:35:08
• plz read follwoing with reference to jee books : IUPAC RULES: In thermodynamics as per IUPAC:(i)Work done by system=negative and (ii)first law is âˆ‚U=âˆ‚Q+âˆ‚W CLASSIC TEXTS[HC VERMA]: (i)Work done by system=positive and (ii ...
replied2011-02-28 09:36:18
• If atoms are small spherical balls,then how can some electron come out of this ball?Is there any hole through which electrons on excitation will come out? ...
replied2011-02-27 03:52:00
• A constant current of 1.5 amp is passed through an electrolytic cell containing 0.10N AgNO3 and a silver anode and a platinum cathode are used.after some time the concentration of AgNO3 solution may be: (a)equal to 0.10 M (b) ...
replied2011-02-26 07:16:00
• I Cannot Understand this 1.Inter facial Angle? 2.F+C=e+2 What does it mean ...
replied2011-02-26 02:37:22
• hydrogen is produced by electrolysis of water.produced hydrogen is used for producing ammonia and nitric acid.if average production of ammonium nitrate is 5000 kg/day,estimate daily consumption of electricity. answer:2.8*105 ...
replied2011-02-26 00:39:29
• manish sir plz tell why this concept is not applicable here CONCEPT:for a compound AxBy: x moles of A=y moles of B PROBLEM:0.75 moles of A4 +2.0 moles of O2 completely react to form a single compound!find the empirical formul ...
replied2011-02-25 00:44:42
• REFERENCE:::ATOMIC STRUCTURE what is wave number 1/wavelength or 2âˆ©/wavelength?? ...
replied2011-02-24 07:25:57
• . ...
replied2011-02-24 00:14:22
• how much time is required fr complete decomposition of 4 moles of water using 4 amperes ? ...