Recently Active Physical Chemistry Questions

Q1 The reaction Cis-Cr(en)2(OH)2+≈Trans-Cr(en)2(OH)2+ where ≈ denotes equilibrium is first order in both the directions.At 25 C teh eq constant is 0.16 and rate constant k1=3.3*10-4 .In an experiment starting with pure ci ...

Q1. The spin quantum numbers +1/2 and -1/2 for the electron spin represent (a) rotation of the electron in clockwise and anticlockwise direction respectively (b) rotation of the electron in anticlockwise and clockwise directi ...

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The pink violet colour of KMnO4 is due to: (a) d-d transition (b) p-d transition (c) charge transfer (d) Both (a) & (c) ...

If 'I' is the intensity of absorbed light and 'C' is the concentration of AB for the photochemical process, AB + hμ ------>AB*, the rate of formation of AB* is directly proportional to A. C B. I C. I2 D. C.I ...

Stmnt 1: LiCl is predominantly a covalent compound Stmnt 2: Electronegativity difference between Li and Cl is too small (IIT 1998) ...

Q)→The aquatic beings (like fish etc.) feel more better in water in winter time then the summer time.WHY ? ...

If an electrolytic solution is diluted to 9 times then its conductance a) Inc. 9 times b) Dec. 9 times c) Remains same d) none ...

1. A substance A decomposes by first order reaction starting initially with [A] = 2.00 M, after 200mins [A] = 0.250 M. For this reactioin what is I + 1/2 II K? 2. Calculate the equilibrium const. for the reaction Fe+2 + Ce+4 ...

1. Statement-I : The sum of mole fraction of all the components of a solutioin is unity. Statement-II : Mole fraction is temperature dependent. 2. Statement-I : Decrease in free energy comes spontaneons reaction. Statement-II ...

1. If an electrolytic solution is diluted to 9 times then its conductance a) Inc. 9 times b) Dec. 9 times c) Remains same d) none 2. 4 M + 8 CN^– + 2H2O + O2 → 4 [M(CN)2 + 4OH– the metal M is (A) Ag (B) Fe (C) Cu (D) Zn ...

What is the molality of 15% solution of H2SO4 by mass?? ...

Q1. STMNT 1: Order of a reaction cannot be determined from balanced stoichiometric equation STMNT 2: Order may not be equal to molecularity Q2. STMNT 1: One mole of CO2 occupies 0.4 L at 300 K and 40 atm STMNT 2: CO2 is more ...

Q1 If ΔHionisation (HCN)=45.2 kJ/mol and ΔHionisation (CH3COOH)=2.1 kJ/mol.Then whats relation ship between pKa of both ?? I am getting pKa(HCN)=45.2/2.1 pKa(CH3COOH) Q2 Find change in deg of disociation be addn of 8.2 gm o ...

1.arrange in order of Increasing ionic size.. Na+, Mg2+, Al3+, F- 2.arrange in order of Increasing first ionization enthalpy B , C , N, O ...

1. Which of the following act as antiseptic ? a) Iodine b) Penicilline c) Morphine d) Bithional 2> Which of the following compounds are covalent a) CaCl2 b) CaO 3) HCl d) CO2 3. Which of the following are polyster a) Bakel ...

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0.1M Cr2O72- will be better oxidisng reagent for ? a)10 ml 1M CH3COOH +10 ml 1M NH4OH b)100 ml 0.1M NaOH +100ml 0.1M HCl c)50ml 0.1M HCl d)100ml 10-7M HCl do we have to use nernst eqn here ?? ...

In alkaline soln K2Cr2O7 with 30% H2O2 gives a red brown compound A(K3CrO8).Find oxidn state of Cr in it. ...

why PH5 does not exist ...

Colloidal solns of glycine and alanine in acidic medium are prepared and mixed.The process which takes place on mixing is called ? ...

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1. A cubic solid is made of two elements P and Q. Atom of Q are at the corners of the cube and P at the body centre. What is the formula of the compound ? What is the coordination numbers of P and Q. 2. Boiling point of water ...

1. The two electrodes of Pt fitted in a conductance cell are 1.5 cm apart while the cross - sectional area of each electrode is 0.75 cm2. What is cell constant in cm^-1? a) 0.2 b) 0.5 c) 2.0 d) 1.125 2. The rate of second ord ...

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How is entropy a state function? Explain ...

Ques 1) Water is brought under a pressure of 1 atm. When an electric current of 0.5 A from a 12 V supply is passed for 300 sec through a resistance in thermal contact with it, it is found that 0.789 g of water is vaporized. C ...

The vapor pressure lowering of 0.1M aqueous solution of non electrolyte at 75° C is ? ( ΔHv of water =9720 cal/mol and antilog 0.407=2.55) ...

Q1 The closest distance b/w 2 atoms among these unit cells (assuming edge length =a in eache cell) a)diamond b)FCC Q2 When NH4Cl is dissolved in H2O ,the temp of H2O decreases hten a)ΔHs>0,ΔHi<ΔHh b)ΔHs<0,ΔHi< ...

*Image* answer should be b,c both na.....???? ...