Recently Active Physical Chemistry Questions

Heat of combustion of acetylen at 25 C is -1300 kJ at constamt pressure.FInd heat of combustion at constant volume. ...

Assertion : The pressure of a fixed amount of an ideal gas is proportional to its temp. Reason : Frequency of collisions and their impact both increase in proportion to the square root of the temperature. ...

When one mole of monoatomic gas at T K undergoes adiabatic change under a constant external pressure of 1 atm changes volume from 1 L to 2 L.The fianl temperature in Kelvin would be A. \frac{T}{2^{2/3}} B. T + 2/3 * 0.0821 C. ...

atomic sold is made up of A type of atoms occuying BCC posiitons.A guest atom of largest possible size without disturbing original config is palced at (a/2,0,a/4) .where a=side length of cube. Find packing fraction ...

Q1 PCl5 is added to flask containing Cl2 at 1 atm and 500K is sealed where eqb is established.Kp=2 atm.Determine % dissociation of PCl5 if eqb pressure is 3 atm.. Q2 1 mole of N2 and 3 mole of PCL5 are taken in a 100 L flask ...

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1..are oxides of H,Bi,Ga,Tl,Sb,Po AMPHOTERIC ?????? 2.WHICH HAS GREATER IONIC CHARACTER --ZnCO3 OR MgCO3 ????? ...

RCM (50) calculate the heat of the foll reaction: CH3COCH3 + 2O2 → CH3COOH + CO2 + H2O Bond energies : C-H = 414.49 C-C = 347.92 C=O = 724.32 O=O = 494.04 O-H = 462.64 C-O = 967.13 Resonance energy : -COOH = 117.23 CO2 = 13 ...

In a cubic closed packed structure of mixed oxides,the lattice is made pup of oxide ions,20%of tetrahedral voids are occupied by divalent x+2 ions an 50% of the octahedral voids are occupied by trivalent Y+3 ions. The formula ...

The spin only magnetic moment value( in Bohr Magneton units ) of Cr(CO)6 is A) 0 B) 2.84 C) 4.90 D) 5.92 ( ANSWER THE QUESTION WITH EXPLANATION ) ...

The dissociation constant of a substituted benzoic acid at 25 °C is 1 x 10-4. The pH of 0.01M solution of its sodium salt is ( INTEGER TYPE QUESTION ) ...

...1..HOW ELECTRIC AND MAGNETIC FIELD CAN AFFECT RATE OF REACTION ?????? ...

WITH t TIME TAKEN IN SECONDS AND I TAKEN IN AMPERE THE VARIATION OF I FOLLOWS THE EQUATION t2+I2=25.WHAT AMOUNT OF Ag WILL BE ELECTRODEPOSITED WITH THIS CURRENT FLOWING IN THE INTERVAL 0-5SEC.Ag-108. A 22mg B 66mg C 72mg D 88 ...

Molar conductivity?? specific conductivity ?? conductivity?? conductance?? are they same?? ...

when Fe(s) is dissolved in aq HCl in a closed vessel, the work done is? positive,negative or 0?? and why? ...

1. Among the following, the surfactant that will form micelles in aq. solution at the lowest molar concentration and ambient conditions is a) CH3(CH2)15N+(CH3)3Br- b) CH3(CH2)11OSO-3Na+ c)CH3(CH2)6 COO-Na+ d) CH3(CH2)11N+(CH3 ...

A first order reaction,A --->B,requires activation energy of 70 kJ/mol.When a 20 % solution of A was kept at 25oC for 20 minutes,25 % decomposition took place. What will be the percent decomposition in the same time in a 3 ...

The nucleidic ration,3H1 to 1H1 is 8.0 x 10-18:1.Tritium undergoes decay with the half life period of 12.3 yrs.How many tritium atoms would 10g of such a sample contain 40 yrs after original sample is collected ? ...

Q)→Match the column tell the (t) option in column B corresponds to which options in column A column A column B A) B2 B) N2 (t) Mixing of 's' and 'p' orbitals. C) O2- D) O2 [pls give the satisfactory explanation for ur answe ...

For ideal gas PV=nRT, Z = PV/nRT for real gas (P + na/v2 )(V - nb)=nRT Ideal gas can't be liquified by applying any pressure and temperature. Q) For one mole of ideal gas ( dP/dT )v( dV/dT )p( dV/dP )T = ? A) - R2/P2 B)- R/P2 ...

Three 1L bulbs shown.Bulb A contains a mixture of H2O,CO2,N2 at 25C (All in gaseous state) and total presure 564 mm of Hg.Bulb B i sempty and at temp -70 C.Bulb C is also empty and at temp of -190 C. CO2 sublimes at -78 C and ...

Q1. Which contains both polar and non-polar bonds? (a) NH4Cl (b) HCN (c) H2O2 (d) CH4 Q2. Spin magnetic moment in BM of Hg[Co(SCN)4] is (do we consider S as donor atom or N?) Q3. Ionic radii of (a) Ti4+<Mn7+ (b) 35Cl- < ...

Kb of an acid base indicator is 10-9. The pH at which its 10-3M solution shows colour change is -------. plz provide ur method also... ...

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64Cu(T50=12.8h) decays β- emission( 38 %),β+ emission(19%) and electron capture(43%).Write the decay products and calculate partial half-lives for each of the decay process. didnt exactly understand the q. ...

The time required for 10% completion of a first order reaction at 298 K is equal to that required for its 25 % completion at 308 K.If pre exponential factor for the reaction is 3.56 x 109s-1,calculate its rate constant at 318 ...

An experiment requires minimum beta activity product at the rate of 346 beta particles per min.The half life period of 99Mo42,which is a beta emitter is 66.6 hours.Find the minimum amount of 99Mo42 required to carry out the e ...