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Thomas Ericson tag : Chemistry 02 Dec, 2022 0 Answer 51 views





























The rate law for a reaction between the substances A and is given by rate = k [A]n[B]m. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as :

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The rate law for a reaction between the substances A and is given by rate = k [A]n[B]m. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as :

Anonymous User tag : Chemistry 26 Feb, 2021 1 Answer 78 views



If at 298K the bond energies of C--H, C-C, C = C, and H-H bonds are respectively 414, 347, 615, and 435 kJ  mol-1. The value of enthalpy change for the reaction

H2C = CH2(g) + H2(g) -->H3C - CH33(g) at 298K will be:

picture

If at 298K the bond energies of C--H, C-C, C = C, and H-H bonds are respectively 414, 347, 615, and 435 kJ  mol-1. The value of enthalpy change for the reaction

H2C = CH2(g) + H2(g) -->H3C - CH33(g) at 298K will be:

Anonymous User tag : Chemistry 26 Feb, 2021 1 Answer 65 views



Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl

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Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl

(1) gets oxidised by oxalic acid to chlorine
(2) furnishes H+ ions in addition to those from oxalic acid
(3) reduces permanganate to Mn2+
(4) oxidises oxalic acid to carbon dioxide and water

Anonymous User tag : Chemistry 18 Nov, 2020 1 Answer 87 views

At 80 C, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80 C and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)

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At 80 C, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm
Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80 C and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)

Anonymous User tag : Chemistry 18 Nov, 2020 1 Answer 76 views




The rate law for a reaction between the substances A and is given by rate = k [A]n[B]m. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as :

picture

The rate law for a reaction between the substances A and is given by rate = k [A]n[B]m. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as :

Anonymous User tag : Chemistry 01 Nov, 2020 1 Answer 72 views



If at 298K the bond energies of C--H, C-C, C = C, and H-H bonds are respectively 414, 347, 615, and 435 kJ  mol-1. The value of enthalpy change for the reaction

H2C = CH2(g) + H2(g) -->H3C - CH33(g) at 298K will be:

picture

If at 298K the bond energies of C--H, C-C, C = C, and H-H bonds are respectively 414, 347, 615, and 435 kJ  mol-1. The value of enthalpy change for the reaction

H2C = CH2(g) + H2(g) -->H3C - CH33(g) at 298K will be:

Anonymous User tag : Chemistry 01 Nov, 2020 1 Answer 73 views