Frequent Physical Chemistry Questions

Why HClO3 Behaves as a stronger acid than HClO? Can anyone explain me the Slater's Rule of Effective nuclear charge? ...

A volume V of a gaseous hydrocarbon was exploded with excess o2 and after cooling a contraction of 2.5 times was noted. A further contraction of 2 twice the volume of hydrocarbon was noted in presence of molten KOH. The molec ...

With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the order : ( arrange sp, sp2, sp3) It should be sp3>sp2>sp because of the repulsion of pi electrons. But the ord ...

A cubical box of side 2.0 m contains helium gas (M0= 4.0) at a pressure of 100N/m2 and temperature T K. During an observation time of 1s, an atom travelling with the root mean square speed parallel to one of the edges of cube ...

A certain fictitious gas is found to obey Van der Waals eqn exactly.the volume of gas is changed from Vi= 1000nb to Vf=2000nb. assume that a is small compared to pV2/n2 ,but not negligible. if change in volume occured at cons ...

Are there any good books in physical chemistry for iitjee available online for free? if yes,pls provide the link also..... ...

A Solution M prepared by mixing 300mL of 0.40M weak monoprotic acid HA (Ka=5.0 x 10-6) and 200mL of 0.5M HCl. if 500mL of 0.28M NaOH is added to solution M,the final pH is the answer is integer type (0-9) solve karo yaron imm ...

1. If the slope " Z (compressibility factor) vs " P " curve is constant ( Slope = π/492.6 atm-1) at a particular temperature (300 K) and very high pressure, then calculate the diameter if the molecules? 2.The density of vapo ...

On the basis of Le-Chatellier's principle, the condition that is unfavourable for the formation of SO3 is 2SO2(g) + O2(g)-----------> 2SO3(g) ; ΔH = − 42 kcal (1) low pressure (2) high pressure (3) high temperature (4) ...

why ∂S = 0 (ENTROPY CHANGE) for reversible adiabatic expansion and compression. ...

Silver Nitrate reacts with calcium chloride according to the following reaction: 2 AgNO3 (aq) + CaCl2(aq) -- > 2 AgCl(s) + Ca(NO3)2 (aq) Calculate the mass of AgCl that would be formed by reacting 100 cm3 of 0.200 M AgNO3 ...

The molecules MLx is planar with 7 pairs of electrons around M in valence shell. The value of x is ... ?? Integer type.! ...

if z-axis is the molecular axis then the p-molecular orbitals are formed by the overlap of (a) 2s and 2px (b) 2px and 2pz (c) 2px and 2px (d) 2py and 2pz ...

A. [Cu(CN)4]3 I.paramagnetic B. [NiCl4]2- II.diamagnetic C. [PdCl4]2- III.dsp2 D. [Cu(NH3)]2+ IV. sp3 V. sp planar ...

A.1s I.no. of angular nodes=1 B.2s II. orbital angular momentum =√2(h/2pi) C.2p III.no of radial nodes =1 D.3d IV.non-directional orbital V. orbital combinations giving pi bonding ...

What is the relation between Boyle Temp. (TB) and Inversion Temp. (Ti) of a gas? Express your answer as 10*(TB/Ti) ...

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 ...

This Question came in my Boards. I solved it, but my friends are getting other answer. So I'm afraid that I lost 4 marks. (Since I know they have studied Chemical Equilibrium more than me and other reason is that his answer w ...

For a radioactive decay reacn. : X -> Y + q a ( where q is the no. of stoichiometric coefficient ) Following graph was observed : http://img849.imageshack.us/i/62431305.png/ If the ratio of the volume of the emitted helium ...

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* ...

Is the unit of molar conductance and molar conductivity same? My book says that the unit of the former is Scm2mol-1 which is the unit of molar conductivity. Any ideas? ...

*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?? ...

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] ...

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 ...

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 ...

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