Recently Active Physical Chemistry Questions

Assumin that all the users hav 2008 paper on their PC s ......... IN the Comprehension on "SOLUTIONS" HOW DO DETERMINE WICH IS TO BE TAKEN AS SOLUTE annd wich as SOLVENT ehtanol or water ??? Does that depend on quantity of ea ...

Which of the foll statements are correct? A)Entropy of isolated system increases in an irreversible process B)Entropy of isolated system remains unchanged in a reversible process C)Entropy can never decrease D)ΔSsys and ΔSs ...

The vapour pressure of two miscible liquids A and B are 300 and 500 mm Hg respectively. In a flask10 moles of A is mixed with 12 moles of B. However as soon as B is added A starts polymerizing into a completely insoluble soli ...

A constant current flowed for 2 hours through a potassium iodide solution oxidizing the iodide ion to iodine 2I- -> I2 + 2e- At the end of the experiment, the iodine was titrated with 21.75 ml of 0.0831 M sodium thiosulpha ...

if the radius of the octahedral void is r and the radius of the atoms in close packing is R, derive the relation b/w r and R ...

Q2 Which of the following is true for a galvanic cell? a) electrons flow from anode to cathode b) reduction occurs at anode c) oxidation occurs at cathode d) all of the above are correct Your Answer: (a) Correct Answer: (d) S ...

Q8 *Image* The relation b/w side lenth and Y batao.......... reason it too...... ...

*Image* ...

could somebody explain the effect of addition of inert gas to a system in equilibrium under different conditions???? ...

the degeneracy of hydrogen atom that has the energy equalto - R/9 is ( where R is rydberg's contant ) a)4 b)6 c)9 d)12 ...

S-I there are no 2d and 3f orbitals S-II the l values of 2d and 3f are 2 and 3 ...

The ratio of 31H to 11H in a sample of water is 8x10-18 :1 31H undergoes decay with a half life 12.3 years the number of tritium atoms would 9 g of the sample contain 40 years after the original sample is collected is a)5.06x ...

S-I spark plugs are not necessary in diesel engines S-II the temperature increases during compression of gases ...

An evacuated gass vessel weighs 50.0 g when empty, 148.0 g when filled with a liquid of density 0.98 gmL-1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K. Determine the molecular weight of the gas. ...

For the reaction N2O5 \Leftrightarrow 2NO2 + 0.5O2, calculate the mole fraction of N2O5 decomposed at a constant volume and temperature, if the initial pressure is 600 mm Hg and the pressure at any time is 960 mm Hg. Assume i ...

The compression factor (compressibilty factor) for aone mole of a van der waals gas at 0°C and 100 atm pressure is 0.5. Assuming that the volume of a gas molecule is negligible, calculate the Van der Waals constant a ...

One mole of nitrogen gas at 0.8 atm takes 38 seconds to diffuse through a pinhole, whereas one mole of an unknown compound of xenon with flourine at 1.6 atm takes 57 sec to diffuse through the same hole. Calculate the molecul ...

THe graph is plotted between PVm along Y axis and P along X axis, Vm is the molar volume of a real gas. Find the intercept on the Y axis. ...

The average velocity o fgas molecules is 400 m/s. Calculate its rms velocity at the sam etemperature.. ...

what is the significance of (1)Z>1 (2)Z<1???? ...

arrange in the order of increasing radii Li+ , Mg2+ , K+, Al3+ ...

In an autoengine with no pollution controls,about 5% of the fuel (C8H10) is unburned.Molar ratio of CO and C8H10 emitted in the exhaust gas is : (a)100 (b)152 (c)50 (d)5 ...

Under critical states of a gas for one mole of a gas ,comprssibilty factor is : (a)3/8 (b)8/3 (c)1 (d)1/4 ...

The compressibility factor of gas is less than unity at S.T.P,therefore: (a)Vm(molar volume)>22.4L (b)Vm<22.4L (c)Vm=22.4L (d)Vm=44.8L Give the correct answer with explaination. ...

*Image* ...

Compare the values of van der waals constants for NH3 and N2.Explain why value a is larger for NH3 but that of b is larger for N2. ...

Q.Calculate the K.E of Avogadro number of gas molecules at 0°C ...

Is V is the observed molar volume and Vid is the ideal molar volume,express compressibility factor Z in terms of V and Vid . how to solve ???? explain step by step ...

Q.Express ideal gas equation into(P=2/3E),where E is the kinetic energy per unit volume. ...

A bulb is filled with 20g of CO2 gas at 296Kand 1atm.The bulb is heated to 336K,and the stopcock is opened.How much CO2 escapes,if the external pressure is 1atm when the stopcock is opened and the bulb is kept at 336K?When th ...