Chemistry
2019 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE CY 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 45
Open questionCYNAT2 marksNeeds review
The number of possible optically active isomer(s) for the following complex is ________.
[(en)₂Co(N₂)(H₂)Co(en)₂]⁴⁺
en = ethylenediamine
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Open questionCYNAT2 marksNeeds review
The specific rotation of optically pure (R)-2-bromobutane is −112.00. A given sample of 2-bromobutane exhibited a specific rotation of −82.88. The percentage of (S)-(+)-enantiomer present in this sample is ________.
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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 47
Open questionCYNAT2 marksNeeds review
Consider the following two parallel irreversible first order reactions at temperature T,
P → Q (k₁)
P → R (k₂)
where k₁ and k₂ are the rate constants and their values are 5 × 10⁻² and 15 × 10⁻² min⁻¹, respectively, at temperature T. If the initial concentration of the reactant ‘P’ is 4 mol L⁻¹, then the concentration of product ‘R’ after 10 min of reaction is ______ mol L⁻¹. (Round off to two decimal places)
(Assume only P is present at the beginning of the reaction.)
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