Recently Active Physical Chemistry Questions

What is the total spin resulting from a d ^ 7 configuration ? ...

In Standard Hydrogen Electrode represented by Pt(s)|H2(g)|H+(aq) has the reaction H+(aq) + e-→ ½H2O.. so.. there is a gain of electrons=> reduction=> its a cathode.. the why is the standard hydrogen electrode taken a ...

In Standard Hydrogen Electrode represented by Pt(s)|H2(g)|H+(aq) has the reaction H+(aq) + e-→ ½H2O.. so.. there is a gain of electrons=> reduction=> its a cathode.. the why is the standard hydrogen electrode taken a ...

The percentage of void volume in face centred cubic lattice is a) 26% b) 0% c) 32% d) 74% ...

How does black body radiation prove the particle nature of light? Why can't it be explained using the wave nature? ...

Specify the coordination geometry around and hybridisation of N and B atoms in a 1:1 complex of BF3 and NH3 a)N :tetrahedral,sp3 ,B :tethedral,sp3 b)N :pyramidal,sp3 , B :pyramidal,sp3 c)N :pyramidal,sp3, B :planar,sp2 d)N :p ...

The volume of helium is 44.8 L at (a) 100° C and 1 atm (b) 0° C and 1 atm (c) 0° C and 0.5 atm d) 100° C and 0.5 atm ...

Supposing the energy of fourth shell for hydrogen atom is – 50 a.u. (arbitrary unit). What would be its ionization potential a)50 b)800 c)15.4 d)20.8 what is ionization potential? ...

The co-ordination number in hcp and ccp type of metallic crystals is a) 4 b) 8 c) 12 d) 6 ...

3 metals A (270), B (80) & C (10) crystallize in simple cubic, face centered cubic and body centered cubic (bcc) phases respectively with unit cell 3, 2 and 1 Å respectively. The densities of A:B:C are in the ratio of: a) 3 ...

The freauency of one of the lines in Paschen series of a hydrogen atom is 2.34 imes {10^{14}} Hz. The quatum number, {n_2} which produces this transitions is – a) Three b) Four c) Six d) Five ...

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An element crystallizes into a structure which may be described by a cubic type of unit cell having one atom in each corner of the cube and two atoms on one of its face diagonals. If the volume of this unit cell is 24 x 10-24 ...

Assuming that Hund's Rule is violated, the bond order and magnetic nature of the diatomic molecule B2 is a.1 and diamagnetic b.0 and diamagnetic c.1 and paramagnetic d.0 and paramagnetic ...

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which of the species has the maximum number of lone pair of electrons on the central atom a) [ClO3]- b) XeF4 c) SF4 d) [I3] ...

If the slope " Z (compressibility factor) vs " P " curve is constant ( Slope = π 492.6 atm-1) at a particular temperature (300 K) and very high pressure, then calculate the diameter if the molecules? ...

At 298K, the thermal expansion coefficient and the Isothermal compressibility of liquid water are and respectively. Then, for water at 300 K and P = 1.00 bar is : a) 1.5 * 10^4 bar b) 3 * 10^-4 bar c) 6 * 10^-4 bar d) 9 * 10^ ...

The number of nearest Cl- ions present around a Cs+ ions in CsCl crystal is__6__8__12__4 ...

The numbers of tetrahedral and octahedral voids respectively present in closest packed crystals containing ‘X’ number of spheres are__2X and X__X and 2X__4X and 2X__4X and X ...

Solid state ...

What is thermal De-Broglie wavelength??? Please give a simple explanation. ...

Bohr said that electrons do not lose energy when they accelarate within discrete energy levels?? Why is that?? After all, the electron is still accelarating and according to Maxwell's Electromagnetic Theory, it shoul be givin ...

sir in the third slide rate of reaction is given aA + bB  cC + dD We can write Rate of reaction= - 1/a ( Δ[A]/Δt) )=- 1/b ( Δ[B]/Δt )= 1/c Δ[C]/Δt )= 1/a ( Δ[D]/Δt ) why is it 1/a and not a??? from where are we get ...

What is the formula of rust? ...

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A sample contains both H3PO4 and HIO3 along with other unknown substances.10 g of sample required 85 ml of 0.15 N NaOH during titration with phenolphthalein as indicator.A separate 10 g sample required 66ml of 0.15 N NaOH dur ...

10 g sample of zinc was dissolved in 200 ml of 0.1 N KMnO4 solution acidified with H2SO4.The KMnO4 solution was totally discharged.It was found that a gas was produced which when allowed to react with the requisite amount of ...

0.395 g of a volatile liquid gives 27.3 cc vapour collected over water at 25oC and 720 mm pressure. Aqueous Tension at 25oC is 23.1 mm. Calculate the molecular weight of the liquid. ...