Recently Active Physical Chemistry Questions

Q1 peptization is a) evaporation of dispersed med b)precipiation of dispered phase c)disintegration of dipersed phase d)combined effect of dispersion medium on dispersed phase Q2 Colloidal particles of water are coagulated ef ...

Oxalic acid decomposes in presence of UO22+ & loses its property. This is used in estimating the amount of decomposed acid & quantum efficiency of the process Here efficiency = 50 % . 1L of 0.005 M oxalic acid solution was ir ...

Use data from Figure to determine whether a solution containing 48 g of KNO3 per 100 g of water at 40 °C is saturated, unsaturated, or supersaturated *Image* ...

Multiple Correct Answer type . The standard enthalpy change of formation of Al2O3(s) is −1669 kJ mol−1 and the standard enthalpy change of formation of Fe2O3(s) is −822 kJ mol−1. (a) ∆Hο for the following reaction. ...

Vapour density of PCl5 is 104.16 but when heated to 230°C its VD is reduced to 62. The degree of dissociation of PCl5 at this temp = (a) 6.8% (b) 68% (c) 46% (d) 64% ...

Which statements are correct ? (a) H2 at 25°C in a volume of 50L has the higher energy per mol of substance than H2 at 25°C in a volume of 10 L . (b) O2 at 25°C and 1 atm has the higher energy per mol of substance than O2 ...

Please read the paragraph carefully and answer the following questions with proper explanations. A student was investigating the speed of reaction between limestone granules and different concentrations of hydrochloric acid. ...

the pH of a solution is 0.1 M NaA and 0.1M HA ( Ka = 1 x 10^-6) would be : a)5 b)6 c) 3 d) 7 detailed answer shall be appreciated ....... ...

Ehylene glycol (HOCH2CH2OH) is a low volatility liquid commonly sold as antifreeze to be mixed with water in car radiators. By adding a nonvolatile solute to the water in the radiator, not only is the freezing point of the re ...

NiO is to be reduced to Ni in an industrial process by the use of the reaction NiO(s) + CO(g) ----Ni(s) + CO2(g) at 1600 K the equilibrium constant for the reaction is 600 . if CO pressure of 150mmHg is to be employed in the ...

T/F 1)Molar heat capacity of H2O in equlibrium with at constant pressure is inifnity 2) At constant pressure of 1atm,ice is in equilibrium with water ...

Q. Correct order of bond length is (a) CO>CO+ (b) NO+ > NO (c) N2>N2+ (d) O2+>O2 ans: (a) ...

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 ...

The following curve is obtained when molar conductivity (â‹€m) is plotted against the square root of concentration for two electrolytes A and B. *Image* then ,correct answers are (a) B is a strong electrolyte and A is a weak ...

an element adopts a cubical crystal structure in which only 68% ocupied.Edge length is 288 pm.If density of element is 7.2 g/cm3 ,the number of atoms in 144g of element ??? Volume=2.4*10^(-23) cc ...

2MnO-4 + 5 H2O2 + 6H+ ---> 2Mn2+ + 8H2O + 5O2 Which of the following r not true ? A) H2O2 is oxidised to O2 B) H+ IS OXIDIZED TO WATER C)Oxdn no. of Mn changes by 6 D) H2O2 is reduced by H2O ...

Can someone please tell me what are Cp , Cv values for monoatomic, diatomic and triatomic gases ?? ...

MULTIPLE ANSWER TYPE Two isotonic solutions have (A) the same weight concentrations (B) the same vapour pressure (C) Osmotic pressure (D) All ...

each of the mixtures listed below was placed in a closed container & allowed to stand . which of the following mixtures is not capable of attaining the equilibrium : CaCO3-----CaO + CO2 ?? A) pure CaCO3 B) CaO nd a pressure o ...

Hydrogenation of vegetable ghee at 25 c reduces the pressure from 2 atm to 1.2 atm in 50 minutes. find the rate of reaction ...

(A)Molality of a solution does not depend on Temparature (R)Molarity of a solution depends on temperature Options r the usual Assertion Reasoning ones ...

MORE THAN ONE CORRECT Q1 active mass = a)a=f.Cm b)a=r.Cm c)Amount of substance per unit volume d)No. of moles per unit litre Q2 consider eq eqn CH3COOH +HF <---->CH3COOH2 - +F - a)F- is conj base of HF b)F- is conj base ...

100 ml of 0.1 M NaAl(OH)2CO3 is neutralised by 0.25 N Hcl to form Nacl ,Alcl3 & CO2 Volume of Hcl reqd is ... (A) 10 mL (B) 40 mL (C) 100 mL (D) 160 mL ...

MATCHING (A) Nacl & Na2SO4 1)Titrating with std solution of H2SO4 (B) Hcl & H2SO4 2)Heating the mixture (C) NaHCO3 & Na2CO3 3)Titrating with std solution of NaOH (D) CaCO3 & MgCO3 4) Treating with excess of Bacl2 ...

The internal pressure of a real gas is inversely proportional to the square of molar volume TRUE/FALSE ...

Assume that impure copper contains only iron,silver and gold as impurities.after passsage of 140 amp, for 482.5 sec, the mass of the anode decreased by 22.260 grams and the cathode increased its mass by 22.011 grams.Estimate ...

An acidic solution of Cu2+ salt containing 0.4 g of Cu2+ is electrolyzed untill all copper is deposited. The electrolysis is continued seven more times with the colume of the solution kept at 100ml and the current at 1.2 amp. ...

Which d-orbital participates in sp3d hybridisation ?? ...

A 4:1 molar mixture of the end CH4 is contained in the vessel at 20 bar pressure. Due to a hole in the vessel the gas mixture leak out. what is the composition of the mixture effising out initially ? ...

20% N2O4 molecules are dissociated in a sample of gas at 27° C and 760mm of Hg. Calculate the density of the equilibrium mixture ? ...