Recently Active Physical Chemistry Questions

for a liquid normal boiling point is 351 K statement: at 351 K and 2 atm pressure , change in gibbs energy ΔG is positive. true or false? and why ...

The oxoanions of which element(in its highest oxidation state) shows least tendency to polymerise? A)B B)Cl C)S D)P doubts : on what factors does tendency to polymerize depend on?? ...

In presence of external magnetic field d-orbitals are a)3-fold degenerate b)5-fold degenerate c)7-fold degenerate d)non-degenerate e)none of these answer in the key was (d) or (e) ..(i don't remember!!!) why is the answer not ...

The molal lowering of vapour pressure of a liquid is 1.008 mm Hg at 25oC in a very dilute solution containing non volatile solute.The vapour pressure of the liquid at 25oC is 'A'x10 mm Hg.The value of 'A' is...... [ Integer t ...

i'm talking about the problem 8.5 (page 264) it is asked to find the species which do not show dispropotionation among ClO-,ClO2-,ClO3-,ClO4- . And also write reactions.... first Q is easy ....but how to write the reactions ? ...

at 300K vapour pres. of pure benzene and pure tolune are 100mm and 30mm of Hg rep. also they form ideal soln.a soln. of benzene and tol. is prep. by mixin 3 mole of tolun in 2 moles of benz. at 300K. 1)at wht external pressur ...

bleaching powder reacts with iodide ion according to the following unbalanced equation OCl- + I- + H+ --------> I2+Cl- + H2O A 0.6 gram sample of bleaching powder requires 35.24 ml of 0.1084 N Na2S2O3 to titrate the libera ...

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When it comes to electronic configuration if Cr is an exception then why not carbon? see the image below *Image* ...

1) what is the hybridisation state of central atom in the cationic part of the solid form of XeF6? (A) sp3 (B) sp3d2 (C) sp3d (D) dsp2 [please don't google. i have the answer but didn't get it myself..so jus wanted to check h ...

It is well known that, "Neil bohr failed in his model in which he described an electron as a charged particle moving in well defined circular orbits about the nucleus." However he failed because of the two major reasons.. a) ...

q) 105 mL of pure water (4°C) is saturated with NH3 gas, producing a solution of density 0.9 g/mL. If this solution contains 30% NH3 by weightt , calculate its volume. (Ans. 166.67 mL) ...

What to do and what not to do in the last month before IIT-JEE http://www.youtube.com/watch?v=Z5-AfiJxjOc&context=C4acfebbADvjVQa1PpcFMQX-FKsRHXxJDA7RTt_k4sN1NL6Iapsuo= ...

Which of the following are non-polar species ? a)AsO3- b) SO32- c)ClO3- d) NO3- Ans: A,B,C plz explain. ...

The molal lowering of vapour pressure of a liquid is 1.008 mm Hg at 25oC in a very dilute solution containing non volatile solute.The vapour pressure of the liquid at 25oC is 'A'x10 mm Hg.The value of 'A' is...... [ Integer t ...

At 298K, the thermal expansion coefficient and the Isothermal compressibility of liquid water are \beta =2\times 10^{-4} \;\;\text{K}^{-1} and \kappa =4\times 10^{-6} \;\;\text{bar} respectively. Then, \left(\frac{\partial \t ...

Q: A Zero order reaction would defnitely be : a) Elementary b) Complex In previous they had given complex (In which i had ticked elementary) as answer.. now in this they give elementary (In which i ticked complex) as answer?. ...

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There are 2 containers having equal volume,temperature and total pressure. 1 contains 5 moles of N2. the other one contains 3 moles of O2 and 2 moles of He.For the same time-interval the gases are diffused outside. Find the r ...

1)A cell Ag|Ag+||Cu2+|Cu initially contains 1M Ag+ and 1M Cu2+ ions. Calculate the change in cell potential after passage of 9.65A of current for 1 hour. 2)Calculate emf of the following cell at 25°C Pt,H2(3 atm)|HCl|H2(15 a ...

The thermal conductivity of graphite along an axis in the plane of hexagonal rings is A)exactly the same as along axis perpendicular to this plane B)is less than along an axis perpendicular to this plane C)is more than along ...

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Nuclear density of iodine-125 atom is approx a)2 x 1015 g/cc b)2 x 1014 g/cc c)2 x 1015 kg/cc d)4 x 10-14 g/cc e)2 x 10-14 g/cc ...

For Ag(s) | AgCl(s) | Cl-(aq) | Br- / AgBr(s) | Ag(s) , E° cell shall be : A) - 1/38.91 log10 Ksp AgBr/Ksp AgCl A) - 1/38.91 log10 Ksp AgCl/Ksp AgBr A) - 1/38.91 loge Ksp AgBr/Ksp AgCl A) - 1/38.91 loge Ksp AgCl/Ksp AgBr My ...

How many minimum H-atoms are required to observe maximum number of distinct spectral lines when an electron jumps from O shell to K shell ? A)3 B)4 C)5 D)6 ...

what is this "VIRIAL EQUATION"????? i cant make head or tail ;-( please explain what this eqn mean Z=1+ B/Vm + C/Vm2 + D/Vm3 ........... ...

Q:3A complex of Zn has the formula [Zn(NH3)x]Cl2 and on reaction with HCl forms NH+4 ions as : [Zn(NH3)x]Cl2+HCl → Zn2+ + NH+4+Cl- 1.02 g complex was treated with HCl and at the end point solution was treated with excess of ...

Q:4 To determine the molar mass of a solid monoprotic acid ,a student titrated a weighted sample of the acid with standardized aqueous NaOH. Which of the following could explain why the student obtained a molar mass that was ...

0.85 gram of saturated hydrocarbon is burnt completely in excess ofO2 gas and all CO2(g) evolved were absorbed in 100ml of NaOH solution. The solution was then separated into two equal parts by volume. One part of the solutio ...

Q:1 A one gram sample containing NaOH as the only basic substance and some inert impurity was left exposed for a very long time so that part of NaOH got converted into Na2CO3 by absorbing CO2 from the atmosphere . The resulti ...