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A → B (first reaction) C → D (second reaction) Consider the above two first-order reactions. The rate constant for first reaction at 500 K is double of the same at 300 K. At 500 K, 50% of the reaction becomes complete in 2 hour. The activation energy of the second reaction is half of that of first reaction. If the rate constant at 500 K of the second reaction becomes double of the rate constant of first reaction at the same temperature; then rate constant for the second reaction at 300 K is ______ × 10⁻¹ hour⁻¹ (nearest integer).

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Two first order reactions temperature dependence and rate constant calculation Q. A → B (first reaction) C → D (second

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For strong electrolyte Λm increases slowly with dilution and can be represented by the equation Λm = Λ°m − Ac¹ᐟ² Molar conductivity values of the solutions of strong electrolyte AB at 18°C are given below : c [mol L⁻¹] → 0.04, 0.09, 0.16, 0.25 Λm [S cm² mol⁻¹] → 96.1, 95.7, 95.3, 94.9 The value of constant A based on the above data [in S cm² mol⁻¹/(mol/L)¹ᐟ²] unit is ________.

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For strong electrolyte Λm increases slowly with dilution and can be represented by the equation Λm = Λ°m − Ac1/2

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A volume of x mL of 5 M NaHCO₃ solution was mixed with 10 mL of 2 M H₂CO₃ solution to make an electrolytic buffer. If the same buffer was used in the following electrochemical cell to record a cell potential of 235.3 mV, then the value of x = ______ mL (nearest integer). Sn(s) | Sn(OH)₆²⁻ (0.5 M) | HSnO₂⁻ (0.05 M) | OH⁻ | Bi₂O₃(s) | Bi(s) Consider up to one place of decimal for intermediate calculations.

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A volume of x mL of 5 M NaHCO3 solution was mixed with 10 mL of 2 M H2CO3 solution

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Identify the correct statements : The presence of −NO₂ group in benzene ring A. activates the ring towards electrophilic substitutions. B. deactivates the ring towards electrophilic substitutions. C. activates the ring towards nucleophilic substitutions. D. deactivates the ring towards nucleophilic substitutions. Choose the correct answer from the options given below :

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Identify the correct statements for the presence of −NO2 group in benzene ring Q. Identify the correct statements : The

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Consider the following aqueous solutions. I. 2.2 g Glucose in 125 mL of solution. II. 1.9 g Calcium chloride in 250 mL of solution. III. 9.0 g Urea in 500 mL of solution. IV. 20.5 g Aluminium sulphate in 750 mL of solution. The correct increasing order of boiling point of these solutions will be : [Given : Molar mass in g mol⁻¹ : H = 1, C = 12, N = 14, O = 16, Cl = 35.5, Ca = 40, Al = 27 and S = 32]

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The correct increasing order of boiling point of aqueous solutions Q. Consider the following aqueous solutions. I. 2.2 g Glucose

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