Recently Active Physical Chemistry Questions

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same amount of NH4Cl is dropped four times in a evacuated vessel and the final pressures recorded P1,P2,P3 and P4 respectively.NH4Cl dissociates as NH4Cl(s)=NH3(g)+HCl(g) when some water is added (assume no change in volume)a ...

Why is resonance required in Chemical Bonding ? ...

The inversion of cane sugar proceeds with half life of 600 min at pH=5 for any concentratiojn of sugar.If pH=6,the half life=60 min.fond rate law i got the answer Rate=k[H+]1 bt ans is R=k[Sugar][H+] how is order 1 wrt sugar ...

Will the molecular orbital structure for N2- and O2+ and NO (all three have same no. of electrons) be same or different? What about their bond order? Explanation is required. ...

96) 50 ML of a solution containing 10-3 mole of Ag+ is mixed with 50 ml of a 0.1M Hcl solution. How much Ag+ remains in the solution? Ksp of Agcl = 10-10 a)2.5 * 10-9 b)2.5 * 10-7 c)2.5 * 10-8 d)2.5 * 10-10 59) Wats the ioniz ...

Arrange these according to the strengths of the σ-bonds they form along with proper reasons: s-s , s-p, p-p overlap of At. orbitals. ...

calculate pH of following solution a) 40ml of 0.050M Na2CO3 + 50ml of 0.040 M HCl b)40ml of 0.020M Na3PO4 + 40 ml of 0.040 M HCl give answers in terms of k1or k2 ...

A catalyst decreases the activation energy of the rxn A→B (reversible) by 2%. ΔH = 37.02 Kcal. At 300 K, 4*10-8% molecules of B are able to cross over the potential energy barrier in absence of catalyst. How many times the ...

In solid AB2 coordination number of of A is 8 .It has cubic closed packed lattice.Half of the atoms of B are removed. Find the number of tetrahedral holes(voids) remain filled ...

If each orbital can hold maximum of 3 electrons,then find the number of elements in fourth period of periodic table ...

Find the weight of CH3COONa needed to add to 1L N/10 CH3COOH to obtain a buffer solution of pH=4 ? Ka=1.8 x 10-5 ...

If degree of ionization of water=1.8 x 10-9 at 298 K,then find its ionization constant ...

For reaction, A(g)↔B(g)+C(g) prove that Kp=α2(Kp+P) ...

What is total volume of solution(in ml) when 1M NaOH is required to be added in 100mL 1M CH3COOH(Ka=10-5) solution so that pH is 6. ...

For reaction 2HI↔H2+I2 Prove that the degree of dissociation α of HI is related to equilibrium constant Kp by the expression \frac{2\sqrt{K_p}}{1+2\sqrt{K_p}} ...

A nucleus is located at(0,0,0).If the probability of finding an s-orbital electron in a tiny volume assumed (a,0,0) is 1 x 10-5.Then find probability of finding an electron in the same sized volume around (0,a,0) ...

The increasing order of dipole moment is a)CH3I<CH3Br<CH3Cl<CH3F b)CH3F<CH3Cl<CH3Br<CH3I c)CH3I<CH3Br<CH3F<CH3Cl d)None ...

A gaseous mixture of O2 and X containing 20% (mole%) of X, diffused through a small hole in 234 second, while pure O2 takes 224 seconds to diffuse through the same hole. Find the molecular weight of X ??????????? Please expla ...

how to do the derivation of the correction term for pressure for ideal gas equation ...

1. Saturated solution of KNO3 is used to make salt bridge because (a) velocity of K+ is greater than that of NO3- (b) velocity of NO3- IS GREATER than that of K+ (c) velocity of both K+ and NO3- are nearly the same (d) KNO3 I ...

1 gm of dry green algae absorbs 4.7 x 10 to the power -3 mole of CO2 per hour by photosynthesis as starch,how long would it take for the algae to double their own weight????? ...

For an ideal binary solution with PA0> PB0,then which relation between XA and YA is correct a) XA=YA b)XA >YA c)XA < YA d)XA/XB<YA/YB ...

a stock room supervisor measured the contents of a partially filled 25 gallon acetone drum on a day when the temperature was 18°c and atmospheric pressure was 780mm Hg,and found that 15.4 gallons of the solvent remained. aft ...

Vapor pressure of most substances increases with temperature Which way of plotting these data is expected to give a straight line? a) 1/P v/s T b) P v/s 1/T c) ln P v/s T d) ln P v/s 1/T ...

Rapid breathing causes CO2 in blood to increase..pH of blood will ___?? Fiitjee ans is NO CHANGE.. but i remember my sir while teaching mentioned,,pH increases and thus v feel dizzy..(any1 wants the reason) is Fiitjee ans wro ...

The total number of different kind of buffers obtained during the titration of H3PO3 with NaOH is __ ?? having a doubt b/w 2 n 1. ...

what conclusion can we draw from arrehenius eqution regarding the temprature dependency on activation energy?? ...

Which pair will show common ion effect ?? A. BaCl2 and Ba(NO3)2 B. NaCl + HCl C. NH4OH + NH4Cl D. AgCN + KCN ...

COULD YOU PLEASE TELL ME SOMETHING ABOUT LIGAND, I ALSO WANNA KNOW ABOUT JOHN TELLER EFFECT. ...