Popular Physical Chemistry Questions

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 ...

we know that NH3 is a strong ligand.but then why complex[Cr(NH3)6]3+ have 3 unpaired electrons. please give the complete and clear concept ...

Consider a pH titration of 50 mL 0.1 M benzoic acid vs 0.1M NaOH at 25°C. The experimentally observed curve is shown below, on which points A, B, C…… F are marked. *Image* a) Which point corresponds to approximately 0.07 ...

1. Which amongst the following is the strongest oxidizing agent? ClO4, BrO4, IO4 2. A student wanted to draw his school building on a glass sheet, which acid he should use? 3. Nitrogen and P give negative ions, while As, Sb a ...

When electron in grnd state of H atom is excited with an energy greater than E2 - E1 but less than E3 - E1 electron will get excited to n=2 True or false ? ...

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

1.) the nodal plane in the pi bond of ethane is located in a) the molecular plane b) a plane perpendicular to the mol plane wich bisects the C-C σ-bond at right angle c) a plane parallel to mol plane d) a plane perpendicular ...

Q if x and y are 2 intensive variables then :- a) xy is an intensive variable b) x/y is an intensive variable c) (x+y) is an intensive variable d) dx/dy is an extensive prorperty ( more than 1 correct) ...

1 gm mix of NaOH and Ca(OH)2 gets completely neutralised by x ml 1 M HCl solution the value of x can be (a)20 ml (b)26 ml (c)15 ml (d) 30 ML ...

The equation for the reaction in the figure below is AB_{5}_{(g)} + heat\leftrightarrow AB_{3}_{(g)} +B_{2}_{(g)} double arrow means the reaction is in equilibrium *Image* At\; time\; 3\; min\; , what\; change\; was\; imposed ...

A catalyst a)increases the average kinetic energy of the reacting molecules b)decreases the activation energy c)alters the reaction mechanism d)increases the frequency of collision of reacting species ...

What is the n-factor of Fe2(SO4)3 in the following reaction: Fe2(SO4)3 --> FeSO4 + SO2 ? ...

1) A solution of 0.2 gm of a compound containing Cu2+ and C2O42- ions on titration with 0.02 M KMnO4 in the presence of H2SO4 consumes 22.6 ml of the oxidant. The resulting solution is neutralized with Na2CO3, acidified with ...

The vapour pressure of water at 15°C is 22 mm of Hg. What will be the vapour pressure of water at 30°C .. Assume that 540 cal of heat is reqd to convert water to vapour. ...

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 ...

mole concept 1.who started symbolic representation of elements which we use today a) dalton b) berzelius ...

Q1 which is not covalent a)CO2 b)SiO2 c)BaO d)CsNO3 Q2 In SiO2 what is coordination no. of Si and O ?? Q3 **deleted ** Q4 The [1 1 1] plane is parallel to which plane in 3D space ? Q5 Find miller indices of plane with interce ...

plot a curve depicting the temperature dependence of the rate R of a simple one step reaction. ...

In the scheme given below, the total number of intramolecular aldol condensation products formed from 'Y' is - *Image* Majority of the coachings have said the answer to be 1 except AAKASH . In the below figure this is what AA ...

The reaction 2N2O5 <--> 4NO2 + O2 follows Ioder kinetics. Hence the molecularity of reaction is unimoleqular. pseudo unimoleqular bimoleqular. none of these. Given that Zn + ½ O2 --> ZnO + 35.28 kj HgO --> Hg +  ...

A closed vertical cylinder is divided into two parts by a frictionless piston, each part contains one mole of air. At 27°C, the volume of the upper part is 4 times the volume of the lower part. Calculate the temperature at w ...

1. Boiling of egg 2. Dissolution of sugar in water ...

A reaction is taking place.. A is converting to B at certain rate..i.e. A B at t=0 10 0 t=2 mins 8 1 t=4 mins 6 2 ... .. Now if we write the reaction as 2A→B then rate=-d[A] = d[B] 2dt dt rateavg(t=2 ...

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If a cube is made such that small spheres are at the corners and large sphere is at the body centre of the cube, then what is the packing fraction of this system? 1. 0.68 2. 0.74 3. 0.52 4. 0.002 ...

Al2O3 is reduced by electrolysis at low potentials and high currents.If 4*104A current is passed through molten Al2O3 for 6 hours,mass of aluminium produced.... ...

In a reaction at equilibrium x mole of reactant A decompose t ogive 1 mole of C and D.It was found that the fraction of A decomposed at eq is independent of conc. of A,then calculate X. ...

for reversible reaction in aq soln Zn2++X-→ZnX+,Keqis greatest when X is??? a)F- b)NO3- c)ClO4- d)I- ...

benzene and toluene form nearly ideal solutions.at 300K p°toluene=32.06mm and p°benzene=103.01mm. a liquid mixture is composed of 3 mole of toluene and 2 mole of benzene.if the presurre over mixture is reduced,at what press ...

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 ...