Recently Active Physical Chemistry Questions

natural oxygen consists of 2 types of atoms one having a mass of 16 and the other having a mass of 18,these atoms are found in what proportion??? ...

*Image* ANS : % Fe3O4 = 34.8; % Fe2O3 = 49.33 ...

[2] [2] pls help yaar mujhe chemical equillibrium main dikkat aarahi hai pls help karo badi basic doubts aarahi hai ..... jaise yeh question hai 3g mole of pcl5 is heated in a flask of 4ltrs at equillib it dissociates to pcl3 ...

How many Bravais Lattices can exist in nature? ...

find the pH of 10-8 N HCl solution ...

1. IN PCl5 ALL BONDS ARE EQUIVALENT AND HAVE SAME BOND LENGTH <TRUE/FALSE> EXPLAIN WITH DIAGRAM :) 2. HOW HYBRIDISATION EFFECTS BOND LENGTH , DOES IT MAKES ALL OF THEM EQUAL AND EQIVALENT .. PLEASE EXPLAIN . :) ...

1)Is Hg-Sb bond a polar or a non-polar?.Explain your answer. 2)Which of the two molecules, OCS and CS2 has higher dipole moment and why? 3)The species that do not contain peroxide ions are: (a)PbO2 (b)H2O2 (c)MnO2 (d)BaO2 (Ex ...

THE DENSITY OF GRAPHITE IS 1.5 AND DENSITY OF DIAMOND IS 3.5 CHANGE IN GIBBS ENERGY IS 1895 JOULE/MOLE. WHAT IS THE PRESSURE WHEN GRAPHITE CHANGES TO DIAMOND ...

The basicity of acid produced in hydrolysis of B2H6 is -- A.4 B.3 C.2 D.1 ...

how many ml of 0.1M HCL are required to rct comp with 1gm mixture of Na2CO3 and NaHCO3 containing equimolar solutions of both?? PLZ explain ...

In a galvanic cell with Fe rod as cathode and Cr as anode and their sulphate salt solutions as electrolytes,if the salt bridge is replaced by a copper wire,then will E°cell drop to zero?why? SRP of Fe =-0.45V SRP of Cr = -0. ...

1 gram of commercial AgNO3 is dissolved in 50 ml water.It is treated with 50 ml of KI solution.The silver iodide thus precipitated is filtered off.The excess KI in the filtrate is titrated with M/10 KIO3 solution in presence ...

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 ...

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http://www.4shared.com/file/93231552/583b68ff/ionic_equilibrum.html check this out and post whether u found it intresting or not ... (it is a test run of file uploading) ...

S-I for the particles having same K>E the de-broglie wavelength is directly proportional to the velocity S-II de broglie concept has significance only for microscopic particles ...

What is the change in the internal energy when 2 moles of liquid water vaporises at 100°C? The heat of vaporisation, ΔH vap. of water at 100°C is 40.66KJmol-1. ...

I want to ask a few questions related with bonding. 1) In the Lewis structure of SOCl2 the sulphur atom makes a doubl bond with oxygen and shares its two lone pairs with the two chlorine atoms.My question is why doesn't the s ...

does delta G(not) change with temp...thou it is defined at 298K only .Q.. 2 A(g) + B(g) (equlibrium) 3S(s) + T(g) delta H(not) = -145 At 298K forward rxn is spontaneous, wt change if ny wud occur in deltaG(not) value as temp. ...

1. which emperical formula for oxide of potasium is least stable ? a>K2O b>KO c> KO2 d>KO3 2. The pressure at which half of an ideal binary liquid solution , containing 1 mole of each component goes into vapor pha ...

REASON AND MEHANISM OF HYDROGEN BRIDGE BOND IN THE DIMER , BORON TRI-HYDRIDE MOLECULE. ...

Assertion: The rate constant of a chemical reaction increases by a factor of 2 approximately on increasing the temperature by 10K. Reason: The number of collisions increase between the molecules due to increase in temperature ...

melting point of a solid will increase its internal kinetic energy..... True/False ...

Two carbon discs of 1.0 g each are 1.0 cm apart have equal and opposite charges. If forces of attraction between them is 1.0*10-5 N. calculate the ratio of excess electrons to total atom on the negatively charged disc. (permi ...

Two moles of an ideal gas is expanded from 1 L to 10 L isothermally and reversibly at 300 K. Find enthalpy change for the reaction. ...

Find the Oxidation no. of each S atom is S2O32- ...

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) ...

hey frends...can sum1 plz explain..wht happnens wen OH ion is added to buffer...how does buffer absorb it..plz explain in details... ...

a given sample of N2O4 in a closed vessel shows 20% dissociation in NO2 at 300K and 1atm,find its heat of dissociation ...

There was this question in the book—Effect of pressure on boiling pt. of a liquid. The book gave its reasons and concludes that increase in pressure increases boiling pt. Sir I quite understood their explanation but then I ...