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 ...

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? ...

how to find the work done in the two processes? plz help *Image* ...

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 ...

*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??? ...

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?? ...

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 ...

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 ...

though not mentioned in syllabus..jee 2000,jee 2004 conatined problems based on these formulas n optics, the Beer–Lambert law, also known as Beer's law or the Lambert–Beer law or the Beer–Lambert–Bouguer law relates t ...

plz guide me on how to solve the questions of this spirit! 7N14+alpha particle→ ? plz guide me on how to solve the problems of this type[21] ...

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? ...

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*Image* PLS BALANCE THE EQ. BY ION OR OXIDATION NUMBER METHOD ...

In phosgene gas reaction at 400°C,initial pressures are pCO=342mm pCl2=32mm.total pressure at equilibrium is 440 mm. Calculate percentage dissociation of phosgene at 400°c at 1 atm! ...

what is speific reaction rate? ...

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 ...

*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 ...

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 ∂U=∂Q+∂W CLASSIC TEXTS[HC VERMA]: (i)Work done by system=positive and (ii ...

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? ...

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) ...

I Cannot Understand this 1.Inter facial Angle? 2.F+C=e+2 What does it mean ...

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 ...

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 ...

REFERENCE:::ATOMIC STRUCTURE what is wave number 1/wavelength or 2∩/wavelength?? ...

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how much time is required fr complete decomposition of 4 moles of water using 4 amperes ? ...

why do like charges repel and opposite attract? ...

what is scintillation????????? ...