Recently Active Physical Chemistry Questions

at 380 degree C, the half life period for the first order decomposition of H2O2 is 360 min. The energy of activation of reaction is 200 kJ/mol. Calculate the time required for 75% decomposition at 450 degree C ...

The time required ofr 10% completion of a first order reation 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 109 s-1, calculate its rate constant at 31 ...

The rate constant for the first order decomposition of a dcertain reaction is described by the equation log_{10} k(s^{-1})=14.3-\frac{1.25\times10^4K}{T} A) What is the energy of activation for this reaction? B) At what tempe ...

A hydrogenation reaction is carried out at 500K. If the same raction is carreid out in th epresence of a catalyst at the same rate the temperature required is 400K. calculate the Activation energy of the reaction if the catal ...

The rate constant for an isomerisation reaction A-->B is 4.5x107 at 100 degree C. and 1.5x107 at 50 degree C. Evealuate Arrhenius parameters A and Ea yes tapan something was missing ;) ...

The rate of first order reaction is 0.04 mol L-1 s-1 at 10 minutes and 0.03 mol L-1 s-1 at 20 minutes after initiation. Find the half life of the reaction. ...

Hyelo everyone... i juzz wanna know what topics are crucial from jee point of view to revise at dis peak tym... here is d list of all topics... juzz help me out in revising d most useful n important ones... GENERAL MOLE CONCE ...

1) Equal weights of methane and oxygen are mixed in an empty container at 25 degree. The fraction of the total pressure exerted by oxygen? a)1/3 b)1/2 c)2/3 2) At const vol. for a fixed no of moles, pressure of a gas increase ...

Parameters of monoclinic unit cell satisfies that of orthorhombic primitive unit cell's.....does it mean.......that orthorhombic..is a type of monoclinic primitive unit cell...???? ...

for the coagulation of 100ml of arsenous sulphide sol 5ml of 1M nacl is required. the coagulation value of nacl is ...

Match the following: E energy K kinetic energy V Potential energy r Radius n orbit \begin{vmatrix} & Column 1 & Column 2 \\ A) & V_n/K_n=? & 0 \\ B) & \text{if radius of nth orbit} \propto E_n^x, x=? & -1 \\ C) & \text{Angula ...

In isotghermal ideal gas COMPRESSION : True/False wid reason pl. 1) ΔG is +ve 2) ΔS is -ve I wnna know the reasons pl....... ...

75.2 g of Phenol is dissolved in a solvent of Kf=14. If the depression in freezing point is 7K then find the % of phenol that dimerises. ...

Parameters of monoclinic unit cell satisfies that of orthorhombic primitive unit cell's.....does it mean.......that orthorhombic..is a type of monoclinic primitive unit cell...???? ...

The molar volume of liquid benzene(density=0.887 g / ml) increases by a factor of 2750 as it vaporizes at 20 degree C and that of liquid toulune (density = 0.867 g/ml) increases by a factor of 7720 at 20 degreeC. A solution o ...

NOW for H3PO4 Ka1=10-4 Ka2=10-7 Ka3=10-10 Find the pH of: 1)mixture of NaH2PO4 (0.1M + Na3PO4(0.1M) 2)H3PO4(0.1M) +NaOH in 1L solution each ...

for H3PO4 Ka1=10 to the pow.(-4)..Ka2=10^(-7),Ka3=10^(-10) ...

Could Sum1 Pls Explain "Equivalence Point"?...I searched in all standard books but got no complete info.....i think i question related to this also came in JEE08............Pls Help ...

A solution of a anon volatile solute in water freezes at -30 degree C. The vapour pressure ofthe pure water at 298K is 23.51 mm Hg and Kf for water is 1.86 K kg/mol. Calculate the vapour pressure o fthis solution at 298k ...

Q 1 ) for a d electron, the orbital angular momentum i s A) 6 (h/2pi) B) 2 (h/2pi) C) (h/2pi) D) 2(h/2pi) Q2) The orbital angular momentum of an electron in 2s orbital is A)1/2 . h/ 2pi B) zero C) h/ 2pi D) 2 h/ 2pi Q3) The f ...

a ball of mass 100 g is moving with 100 ms-1. 1 mark JEE 2004 :P ...

Q 1 ) number of radial nodes of 3s and 2p orbitals are respectively.. Q 2) Quantum numbers +1/2 and -1/2 for the electron spin represent A) Rotation of the electron in clockwise and anti clockwise directio nrespectively B) Ro ...

With what velocity should alpha particle travel towards the nucleus of a copper atom so as to arrive at a distance of 10-13 metre from the nucleus of the copper atom. ...

The Schorodinger wave equation for hydrogen atom is ψ \Psi_{2s}=\frac{1}{4\sqrt{2\pi}}\left(\frac{1}{a_0} \right)^{3/2}\left(2-\frac{r_0}{a_0} \right)e^{-r_0/a_0} where a0 is the Bohr's radius, if the radial node is 2s be ...

This may be simple but I'm not too comfortable with ionic(even the simplest[2][2]). So pls help !!! A young scientist performs the foll. set of experiments to find the pH of the resulting soln. at diff. equivalence pts. ,the ...

to 500 cm^3 of water, 3.0x10-3 kg of acetic acid is added. If 23% of acetic acid is dissociated, what will be the depression in freezing point? Kf and density o fwater are 1.86 K kg/mol and 0.997 g/cm^3 respectively. ...

Nitrobenzene is formed as the major product along with a minor product in the reactionof benzene witha hot mixture of nitric acid and sulphuric acid. The minor product consists of carbon: 42.86%, Hydrogen:2.4%, nitrogen:16.67 ...

1.22g of benzoic acid is dissolved in 100 g of acetone and 100g of benzene seperately. Boliing point of the solution in acetone increases by 0.17 degree C, while that inthe benzene increases by 0.13 degree C; Kb for acetone a ...

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1.) the molecularity of the reaction 2 H2(g) + O2(g) --> 2 H2O (l) is: a)2 b) 3 c)undefined d)1 2) the rate consant for a first order reaction is equal to the initial rate of reaction wheb the initial concentration of the ...