Recently Active Physical Chemistry Questions

1`In the face centered cubic arrangement of A and B atoms where A atoms are at the corner of the unit cell and B atoms at the face centres. One of the A atom is missing from one corner in the unit cell. What is the simplest f ...

A hydrogen electrode placed in a buffer solution of CH3COONa and CH3COOH in the ratios of x:y and y:x has electrode potential(oxidation) E1 volts and E2 volts respectively at 25°C. what is the pKa of acetic acid? ...

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 ? ...

when 1-pentyne(A) is treated with 4N alc. KOH at 175 °C , it is converted slowly to an eqm mixture of 1.3% 1-pentyne(A), 95.2% 2- pentyne (B) and 3.5% 1,2- pentadiene (C). the eqm mixture was maintained at 175 °C. calculate ...

At pH = pKIn+ 1 ( where KIn = dissociation constant for indicatior ) the ratio of [In-1]/[HIn] in the solution is {10/1} for this pH the % dissociation of the indicatior is 1. 91 2. 80 3. 10 4. 63 ...

Can an atom form multiple Hydrogen Bonds? ...

certain volume of hydride of nitrogen is decomposed into its constituent elements by certain spark The volume of the resulting gas mixture becomes double of the initial volume Now oxygen has been added to the resulting gas mi ...

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 ...

Two solutions of equal volume, but one having pH 4 and other having pH 10, are mixed. What is the pH of the resulting solution? ...

A solution has a pH = 5 ..... ID 1mL IS DILUTED TO 1L then wat will be the pH of the resulting solution............ ...

Q59) The number of neutrons accompanying the formation of 139Xe54 and 94Sr38 from the absorption of a slow neutron by 235U92, followed by nuclear fission is a) 0 b) 1 c) 2 d) 3 ANS : 3 shud it not b 2 59 (d) balancing the mas ...

The vapour pressure of water at 20°C is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is added to 178.2 g of water at 20°C, the vapour pressure of the resulting solution will be (1) 16.500 mm Hg (2) 17.325 mm Hg (3) 17.675 mm Hg ...

something is definitelly too wrong or too right today 2 questions in chem that too same topic [4] plz help guyz and galz Q) Three moles of an ideal gas (Cv = 12.5 JK-1mol-1) are at 300K and 5dm3. If the gas is heated to 320 K ...

my first question in chemistry and understandably quite a dumb one too... ΔG = ΔH - TΔS ( i understand this to be the def.) and ΔS = q/T ( i understand even this to be some def.) so ΔG = ΔH - q where Δstands for change ...

the density of a 3.60 M sulphuric acid solution that is 29% H2SO4 by mass will be ?????????????????????????????????????? ...

wat is the degree of dissociation for 1st order reaction ...

y entropy of solution increases on mixing non volatile solute with pure solvent ...

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Consider a unit cell in which atoms will occupy all corner points, all face centres, body centre and also all edge centres of the cube. Q65) The radius ratio of the voids (rvoid/ratom) is a) 0.366 b) 0.414 c) 0.225 d) 0.732 a ...

The standard molar enthalpies of formation of cyclohexane (1) and benzene (1) at 25°C are – 156 and + 49 kJ mol–1, respectively. The standard enthalpy of hydrogenation of cyclohexene(1) at 25°C is – 119 kJ mol–1. Us ...

FIITJEE says in its solutions to full test 11 that, 100 ml of 0.1M NaH2PO4 + 10ml 0.1M NaOH is an 'acidic ' buffer,do you agree? ...

at infinite dilution weak electrolytes dissociates completely then y conductivity is low reffered to last 4 line of n.cert ...

y Ecell=0 when equilibrium is attained ...

Good place for all chem lovers[1][1] http://www.shodor.org/unchem/basic/index.html hope u like it...[1] ...

pH of strong base, weak acid = 0.5 * (pKw + pKa + log(c) over here C is concentration in Molar or Normal????? ...

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why we can't store CuSo4 in zinc? becoz cu oxidizes zn ...

what is EMF? HOW IT LINKS WITH CELL POTENIAL AND ELECTRODE POTENTIAL? WE USE NERNEST EQUATION TO FIND WHAT ...

What are the Cv values for CH4 and CO2@ 400K,1200K and 1400k please tell the method of calculation ...

SORRY :( 4 DISCUSSIN goiit ques here.... but over ther none get solved and no Expert replies!!! QUE 1 Lattice (III): A atoms and B atoms crystallises as: A atoms occupying the corners whereas B atoms are occupying all the edg ...