Recently Active Physical Chemistry Questions

In Rutherford's gold foil experiment when a alpha particle approaches a nuclei then 1/2 mv2= 1/4piE0 2Ze2/r0 r0 is the distacne of closest approach. This distance is nearly 10-14m.So the radius of the nucleus should be less t ...

we know that photons are mass less energy particles given by einstein. bt he gave a formula E=mc2 then what does m represents ...

A mixture of CO and CO2 when treated with I2O5 , gives I2 vapour according to following eqn. : 5CO + I2O5 - > 5CO2 + I2 I2 vapour was separated nd treated with HClO4 and resultant HIO4 reqd. 0.001 moles of glycerol ( CH2OH ...

1) The rate of diffusion of 2 gases 'A' and 'B' are in the ratio 16:3. If the ratio of their masses present in the mixture is 2:3, then find (i) The ratio of their molar masses (ii) The ratio of their moles present inside the ...

1) How can we say that entropy is a function of probability of thermodynamic sate? 2) Ludwig-Boltzmann statement for Second law of thermodynamics(SLOT): "Nature tends to pass from less probable to more probable state" How is ...

How do we separate ethane from monochloroethane physically... like in a reactor? The given situation is that monochloroethane is being produced by chlorination of ethane.. i want more of product.. so i am applying le chatteli ...

For the complete coagulation of 200 mL of As2S3 solution, 10 mL of 1 M NaCl is required. What is the coagulating value of NaCl ? (A)200 (B)100 (C)50 (D)25 ...

for the longest wavelength transition in the Balmer series of atomic hydrogen. please help ...

A neutral gas sample contains 84% ( by volume ) of CH4 , 10 % of C2H6 , 3 % of C3H8 and 3% of N2 . If a series of catalytic reacns cud be used for converting all the C atoms of the gas into butadiene , C4H6 , with 100% effici ...

can ne1 say wat is ortho effect??? ...

Which of the following statements is correct if Standard reduction potentials of Cu and Sn are 0.337V and -0.136V resp. (both from +2 charge) a) Cu2+ ions can be reduced by H2(g) b) Cu can be oxidised by H+ c) Sn2+ ions can b ...

In the electrolysis of sulphuric acid, Why is OH- oxidised at the anode and not H2O ? Can someone tell me about their reduction potentials? ...

An element 'A' forms 2 oxides , the weight ratio composition in them, A:O =[ x : y ]in the first oxide and... [ y : x ] in the second oxide. If the equivalent weight of 'A' in the first oxide is 10.33 , calculate the equivale ...

plz help me out in these doubts..: 1. how can u explain the concept dat when a reaction shifts in the forward reaction, the greater concentration of products are formed.. and vice versa.... why does this happen.... plz tell m ...

how to calculate distance between neighbouring molecules ...

Q1 Define and differentiate between the two terms below: Standard reduction/oxidation potential & Discharge potential Q2 Corrosion is an example of electrolysis but any electrolysis reaction requires a minimum E.M.F. across t ...

can ne1 plz explain me the concept the concept of Buffer solutions..... hw to determine....the buffer of a particular solution..... ...

Q- how many coulombs of charge is present on 1-g N-3 ion ? ...

a closed container of volume 0.02m3 contains mixture of neon and argon gases at a temperature 27°C.pressure 1*10^5.the total mass is 28g.if gram molecular weight of neon and argon is 20 and 40 find masses of indiviual gases. ...

A certain quantity of an organic liquid (mol. wt. 85) was introduced into an air filled flask of volume 6.5 L and sealed at Temperature of 17 degrees C and 760 mm og Hg . The flask was heated to a temperature of 307 degrees C ...

How do we find out whether a particular compound is better oxidising/reducing agent in alkaline or acidic medium? for eg , SO2 is more powerful reducing agent in an alkaline medium than in acidic medium. how do we know this ? ...

I really need help with questions like these. 24cm3 of a mixture of methane and ethane were exploded with 90cm3 of oxygen. After cooling to room temperature, the volume of gas was noted. It was found to decrease by 32cm3 when ...

in case of positive adsorption there are unbalanced forces on the surface which causes the phenomenon but why does negative adsorption take place? ...

1) The half-time of first order decomposition of nitramide is 2.1hr at 15°C NH2NO2(aq) → N2O(g) + H2O(l) If 6.2g of NH2NO2 is allowed to decompose, calculate a) time taken for NH2NO2 to decompose 99%. b) volume of dry N2O ...

Given that the radius of Mg2+ , O2- , S2- are 0.65A , 1.41A, 1.84A respectively. what will be the co-ordinaion no. of Mg2+ in MgO and MgS respectively. y isn't the ans same????? ...

A 1st order reacn with half life 20 days is cccuring at 27°C . If 10-2 % molecules r in activated state . Find the maximum rate constant. (A) 3.4 * 10-2 (B) 3.4 * 102 (C) 10-4 (D) can't be determined ...

NO3- , CO32- , and SO3 are isoelectronic but only first two are isostructural. WHY??? EXPLAIN...... ...

In which of the following solutions effect of dilution will not take place?? (A) 100 ml 0.1 M CH3COOH with 50 ml 0.1 M NaOH (B) 100 ml 0.1 M CH3COOH with 100 ml 0.1 M NaOH (C) 100 ml 0.1 M CH3COOH with 50 ml 0.1 M NH4OH (D) 1 ...

balance the reactions: (i) SO2 + Na2CrO4 + H2SO4 → Na2SO4 + Cr2(SO4)3 +H2O (ii) C2H5OH + I2 + OH- → CHI3 + HCO2- + H2O + I- I am facing the same problem in both the reactions for eg taking (i) reaction step I S4+ → S6+ ...

Consider a titration of Potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as indicator. The number of moles of Mohr’s salt required as per mole of dichromate is (2007) a. 3 b. 4 c. 5 d. ...