Recently Active Physical Chemistry Questions

A body weighing 3x103kg is moving and its speed can be measured with an accuracy of ±0.0025 mile per hour and its position with an accuracy of ±0.01 mile.Is the uncertainty principle valid? ...

How many times larger is a hydrogen atom than the radius of an H atom in its ground state if the H atom with an electron characterised by a quantum number of 106? (a)106 (b)212 (c)11236 (d)none of these ...

Emission spectrum of Li2+ has 10 lines.Find wavelength of photon having minimum and maximum energy. ...

If we doubled the concentration of x In the reaction X→Y, then rate of the reaction become 4 times of it's initial rate. what is the order of the reaction?? ...

A current of dry air was bubbled through a bulb containing 26.6 g of an organic substance in 200 gms of water, then through a bulb at the same temperature containing pure water and finally through a tube containing fused calc ...

If atom X has 6 unpaired electrons.Find probable atomic number of X. Consider elements upto atomic number 50. ...

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The natural titanium oxide, known as rutile and containing 39.95% of oxygen, is isomorphous with SnO2, known as casseterite. Calculate the atomic weight of titanium. ...

The enzyme carbonic anhydrase catalyses the hydration of CO2.This reaction:CO2+H2O→H2CO3,is involved in the transfer of CO2 from tissues to the lungs via the bloodstream.One enzyme molecule hydrates 106 molecules of CO2 per ...

4.9 g of KClO3,,on heating,shows a weight loss of 0.384 g.What per cent of the original KClO3 has decomposed? ...

Find the mass of Cu(NO3)2.3H2O produced by dissolving 10 g of copper in nitric acid and then evaporating the solution. ...

Q In complex [Fe(H2O)5(NO)]2+ , NO molecule is present as : Attempt: The answer given is NO+, But I think here NO is neutral. Q An equimolar mixture of toulene and chlorobenzene is treated with a mixture of Conc. Nitric acid ...

1) starting with this one-work done dW=PextdV but in all the cases we take Pext=nRT/V in solving the problems,we integrate from there but Pext is not equal to nRT/V??? then why are we taking equal??? 2) internal energy- Does ...

Does kx depend on both temp. and pressure. (Here x denotes mole fraction) ...

A mixture of H2O(v), CO2 and N2 was trapped in a glass apparatus with a volume of 0.731 ml. The pressure of total mixture was 1.74 mm of Hg at 23°C. The sample was transferred to a bulb in contact with dry ice(-75°C) so tha ...

A graph is plotted between PVm along y axis and P along x axis,Vm is molar volume of real gas.Find intercept along Y axis. Please explain how you have solved it ! Answer is Pb+RT ...

When a mixture of NaBr and NaCl is repeatedly digested with H2SO4, all the halogens are expelled and Na2SO4 is formed quantitatively. With a particular mixture, it was found that the weight of NaBr-NaCl mixture taken. calcula ...

The state of hybridisation of central atom in POCl3 is : 4+ 1/2 (5-5)=4→sp3 ....can anyone explain that formula in bold letters.... ...

An acid-base indicator (ka = 3 * 10-5 ) has red colour in acid form and blue colour in basic form . which is/are correct statements; (A) 75% red form will exist at pH = 4.05 (B) indicator will show red colour at pH = 3.53 (C) ...

Q) for a reaction activation energy = 0 and k= 3.2 s-1 at 300 K. the value of k at 310K = ? doubt: does activation energy vary with temperature.so wats the answer ...

hey guys could anyone explain how to find equvalent weight in reaction such as, example 1- 4KMnO4 + 5HC2O4.H2C2O4.2H2O + 13H2SO4 → 4MnSO4 + 9KHSO4 +20CO2 + 18H2O the equivalent weight of potassium tetraoxalate crystals are? ...

hey guys could anyone explain how to find equvalent weight in reaction such as, example 1- 4KMnO4 + 5HC2O4.H2C2O4.2H2O + 13H2SO4 → 4MnSO4 + 9KHSO4 +20CO2 + 18H2O the equivalent weight of potassium tetraoxalate crystals are? ...

Two solids components A and B dissociate into gaseous products at 20°C as i) A(s) → A'(g) + H2S(g) ii) B(s) → B'(g) + H2S(g) At 20°C pressure over the excess solid A is 50 mm Hg and that over excess solid B is 68 mm Hg. ...

An open vessel at 27°C is heated until the 3/5 of the moles of the air in it has been expelled. Assuming that the volume of the vessel remains constant, what is temperature to which the vessel has been heated. a) 27°C b) 30 ...

I know this might sound silly But can someone tell me how resistance is extensive? And molar conductivity intensive?? ...

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Can someone tell me how to Find the equivalent Molar Mass for disproportionation reactions? Eg. H3PO2→PH3 + H3PO4 ...

1.) 1L solution containing NH4Cl and NH4OH has OH- concentration 10-6 moles/litre. Which of the following can be precipitated when solution is added to 1L soution of 0.1M metal ions? 1.Ba(OH)2(Ksp=5x10-3) 2.Ni(OH)2(Ksp=1.6x10 ...

For the dissociation reaction N2O4→2NO2 the degree of dissociation α in terms of Kp and total equilibrium pressure P.. ...

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