Recently Active Physical Chemistry Questions

1. if the ratio of the coordination number of P to Q is Y:Z then the formula of the solid containing atoms of P and Q is...........??? 2. the lattice energy of solid NaCl is 180kcal/mol. the dissolution of solid in water in t ...

its given that " Keq changes only when the temperature changes. There is no effect of change in pressure or concentrations on the value of Keq ." Can someone please tell what is the reason behind this?????? ...

1) CALCULATE pH of a 0.01 M SOLUTION at 25 ° C WHICH RESULTS IN THE FORMATION OF 0.01 % OH - ION IN THE REACTION OF CH3COO- WITH H2O. CH3COO- + H2O → CH3COOH + OH - 2) FOR WHICH OF THE FOLLOWING SOLUTIONS MUST WE CONSIDER ...

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The molecular weight of iodine vapor is 241 at 1atm and 800°C and 212 at same pressure but at 1027°C.Calculate degree of dissociation and coefficient i for different pressures ...

A gaseous mixture consists of methane,oxygen,and sulfur dioxide in weight ratio 4:2:1.The mixture was then allowed to effuse through a small hole at a definite temperature.What will be mole composition of mixture leaving hole ...

6g of He having average velocity of 4*102 m/s is mixed with 12g of Ne20 having same average velocity.What is average Kinetic energy per mole of mixture? ...

One mole of monoatomic vanderwaal gas when confined in 5L flask at 300K reads 4.85 atm on a barometer scale.Determine values of vanderwaal constant .Also determine diameter of gaseous atoms ...

Determine volume of air containing 20% oxygen by volume,that would have to be inhaled at 20°C and 1 atm to consume 1Kg of fat C57H110O6 assuming that only 70% by volume of the oxygen present in air is used up in combustion ...

1L of gas at 300atm and 473 K is compressed to a pressure of 60 atm and 273K.The compressibility factors found to be 1.072 and 1.375 at initial and final states.Calculate final volume ...

1 mL of sample of aqueous solution of tritium is injected into animals blood stream.the sample has an activity of 1.8 x 106 cps.After sufficient time for sample to be completely mixed with blood,2 mL of blood is withdrawn fro ...

Lowering of vapor pressure is determined by this process In the following process,Air is allowed to pass through a solvent or solution;it takes up solvent vapor with it ot get itself saturated with vapors at that temperature ...

Find intercept and slope when 1/XA v/s 1/YA is plotted ...

What is meant by a hard acid and a hard base?Please explain. ...

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Q1. MULTIANSWER CORRECT choose the correct statements (A) KMnO4 is a powerful oxidising agent (B) KMnO4 is a weaker oxidising agent than K2Cr2O7 in acid medium (C) KMnO4 is a stronger oxidising agent than K2Cr2O7 in acid medi ...

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An acid type indicator, HIn differs in colour from its conjugate base (In–). The human eye is sensitive to colour differences only when the ratio [In–] / [HIn] is greater than 10 or smaller than 0.1. What should be the mi ...

How many grams of silver could be plated out on a serving tray by electrolysis of a solution containing silver in + 1 oxidation state of period of 8.0 hours at a current of 8.6 Amperes? What is the area of the tray if the thi ...

What is the order of lattice energy evolved during the formation of the following ionic compounds from their respective ion pair in gaseous state? MgO, CaF2, LiF ...

25 ml of a gaseous hydrocarbon having the same rate of diffusion as nitrogen,and methane effuse through a hole in 173 min,while the same volume of nitrogen effuses in 200 min under the same conditions calculate the contractio ...

A gas in an open container is heated from 27°C to 127°C.The fration of the original amount of the gas remaining in the container will be: (a)3/4 (b)1/2 (c)1/4 (d)1/8 ...

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Multianswer correct Q. According to Charles law (A) V is prop to 1/T at const pressure (B) ( dV/dT )P = K (C) ( dT/dV )P = K (D) [ 1/T - V/T2 ]P = 0 ...

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a spherical balloon with a diameter of 21 cm is to be filled up with hydrogen at STP from a cylinder containg the gas at 20 atm and at 27°C. If the cylinder can hold 2.82 L of water,calculate the number of balloons that can ...

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formula for maltose sucrose glucose fructose ...

the pressure in a vessel that contained pure oxygen dropped from 2000 torr to 1500 torr in 55 min as the oxygen leaked through a small hole into a vacuum.when the same vessel was filled with another gas,the pressure dropped f ...