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For a zeroth order chemical reaction, which one of the following is FALSE?

**For a zeroth order chemical reaction, which one of the following is FALSE?**

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Assuming the solid phases to be pure, the slope of line BC in the predominance area diagram schematically shown below is _____ (answer up to two decimal places) Read more

Assuming the solid phases to be pure, the slope of line BC in the predominance area diagram schematically shown below is _____ (answer up to two decimal places)

Pure orthorhombic sulphur transforms to stable monoclinic sulphur above 368.5 K. Applying the third law of thermodynamics, the value of entropy (in JK-1) of transformation at 368.5 K is _____ (answer up to two decimal places) Given: Entropy change associated with ...Read more

Pure orthorhombic sulphur transforms to stable monoclinic sulphur above 368.5 K. Applying the third law of thermodynamics, the value of entropy (in JK^{-1}) of transformation at 368.5 K is _____ (answer up to two decimal places)

Given: Entropy change associated with heating orthorhombic sulphur from 0 KΒ to 368.5K is 36.86 J K^{-1}.

Entropy change associated with cooling monoclinic sulphur from 368.5 K to 0 K is -37.8 J K^{-1}.

A solution contains 10-3 M of Fe+3 at 25Β°C. The solubility of product of Fe(OH)3 is 10-39. Assuming activity equals concentration, the maximum pH at which Fe+3 will precipitate as Fe(OH)3 is _______. (answer up to two decimal places)

A solution contains 10^{-3} M of Fe^{+3} at 25Β°C. The solubility of product of Fe(OH)_{3 }is 10^{-39}. Assuming activity equals concentration, the maximum pH at which Fe^{+3 }will precipitate as Fe(OH)_{3 }is _______. (answer up to two decimal places)

A stoichiometric equation of CO and pure oxygen at 1atm and 25Β°C flows into a combustion reactor. The molar flow rate of CO entering the reactor is 1kg-mol.h-1. The adiabatic flame temperature (in K) for the combustion of CO with ...Read more

A stoichiometric equation of CO and pure oxygen at 1atm and 25Β°C flows into a combustion reactor. The molar flow rate of CO entering the reactor is 1kg-mol.h-1. The adiabatic flame temperature (in K) for the combustion of CO with stoichiometric oxygen is ______. (answer up to two decimal places).

Given ΞH0298 (CO-CO2) =-282000 KJ (kg-mol-CO)-1, Cp(CO2)= 44 KJ (kg-mol K)-1

CaCo3(s) dissociates in a closed system according to the reaction : CaCO3(s) = CaO(s) + CO2(g) Assuming the reaction is in thermal equilibrium, the degree(s) of freedom, F = _____.

CaCo_{3}(s) dissociates in a closed system according to the reaction :

CaCO_{3}(s) = CaO(s) + CO_{2}(g)

Assuming the reaction is in thermal equilibrium, the degree(s) of freedom, F = _____.

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A continuous cast steel slab, 1m Γ 1m Γ 0.1m at 1298 K cools in air. The initial rate of heat loss (in kW) from the top surface of slab by radiation and convection is _____ (answer up to two ...Read more

A continuous cast steel slab, 1m Γ 1m Γ 0.1m at 1298 K cools in air. The initial rate of heat loss (in kW) from the top surface of slab by radiation and convection is _____ (answer up to two decimal places)

(Given (i) Ambient temperature= 298K (ii) emissivity of steel=0.8 (iii) convective heat transfer coefficient = 4.6 W m^{-2}K^{-1 }(iv) Stefan-Boltzmann constant (Ο)= 5.7 Γ 10^{8 }W m^{-2 }K^{-4 }

T1 and T2 are melting points of pure metal A and pure stoichiometric oxide AO2, respectively and T1<T2. The stoichiometric metal oxidation reaction A(s) + O2(g) = AO2 (s) is in equilibrium at 1 atm pressure at temperature less than ...Read more

T1 and T2 are melting points of pure metal A and pure stoichiometric oxide AO_{2}, respectively and T1<T2. The stoichiometric metal oxidation reaction A(s) + O_{2}(g) = AO_{2 }(s) is in equilibrium at 1 atm pressure at temperature less than T1. If the temperature increases, which schematic represents the correct standard free energy change versus temperature plot?

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Hydrogen dissolves in Pd by the reaction H2=2[H]. At 3000C and pH2= 1 atm, the solubility of hydrogen in Pd is 1.6Γ 104Β mm3Β (STP) per kg of Pd. At 3000C and pH2= 0.09 atm, the solubility of hydrogen in Pd in ...Read more

Hydrogen dissolves in Pd by the reaction H_{2}=2[H]. At 300^{0}C and pH_{2}= 1 atm, the solubility of hydrogen in Pd is 1.6Γ 10^{4Β }mm^{3Β }(STP) per kg of Pd. At 300^{0}C and pH2= 0.09 atm, the solubility of hydrogen in Pd in mm^{3} (STP) per kg of Pd is _______. (answer upto one decimal place)

For the electrochemical reaction, Cu2++Zn= ZnΒ 2++Cu, the standard cell potential at 250C and 1 atm pressure is (Given E0(Cu2+/Cu) =0.337 V and E0(Zn2+/Zn) = -0.763V) ( A) -0.426 VΒ Β Β (B) 0.426 VΒ Β Β Β (C) 0.55 VΒ Β Β Β ...Read more

For the electrochemical reaction, Cu^{2+}+Zn= ZnΒ ^{2+}+Cu, the standard cell potential at 25^{0}C and 1 atm pressure is

(Given E^{0}(Cu^{2+}/Cu) =0.337 V and E^{0}(Zn^{2+}/Zn) = -0.763V)

( A) -0.426 VΒ Β Β (B) 0.426 VΒ Β Β Β (C) 0.55 VΒ Β Β Β Β (D) 1.1V

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At a temperature of 710 K, the vapour pressure of pure liquid Zn is given by: πππ(ππ§π = 1.0) = 3.6 Γ 10β4atm. The Raoultian activity coefficient (πΎππ) of Zn in Zn-Cd alloy liquid at 710 K is approximated by: ...Read more

At a temperature of 710 K, the vapour pressure of pure liquid Zn is given by: πππ(ππ§π = 1.0) = 3.6 Γ 10^{β4}atm. The Raoultian activity coefficient (πΎππ) of Zn in Zn-Cd alloy liquid at 710 K is approximated by: ln(πΎππ) = 0.875(1 β πππ)^{2} . The ratio [ πππ(ππ§π=0.7) ] / πππ(ππ§π=1.0)for a liquid alloy with π= 0.7 is ________. (*to two* *decimal places)*.