Chemistry
2018 · Paper 1
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Complete GATE CY 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.
Question 42
Open questionCYMCQ2 marksNeeds review
The reaction of equimolar quantities of Fe(CO)₅ and OH⁻ gives a complex species X which on further reaction with MnO₂ gives species Y. X and Y, respectively, are
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The rate constant of a first order reaction, X → Y, is 1.6 × 10⁻³ s⁻¹ at 300 K. Given that the activation energy of the reaction is 28 kJ mol⁻¹ and assuming Arrhenius behavior for the temperature dependence, the total time required to obtain 90% of Y at 350 K is__________ s. (Up to one decimal place. Use R = 8.31 J K⁻¹ mol⁻¹)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 44
Open questionCYNAT2 marksNeeds review
The molar conductivity of a 0.01 M weak acid (HX) at 298 K, measured in a conductivity cell with cell constant of 0.4 cm⁻¹, is 64 S cm² mol⁻¹. The limiting molar conductivities at infinite dilution of H⁺ and X⁻ at 298 K are 350 and 410 S cm² mol⁻¹, respectively. Ignoring activity coefficients, the pKₐ of HX at 298 K is __________. (Up to two decimal places)
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