Chemical Science Test Booklet Form
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Chemical Science Test Booklet Form

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@HappyBallad

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Questions and Answers

What is the duration of the exam?

  • 3 hours
  • 2 hours (correct)
  • 4 hours
  • 1 hour

    • How many objective type questions are there in the paper?

  • 100 (correct)
  • 75
  • 125
  • 50

    • What should students do in the first 5 minutes of the examination?

  • Start answering the questions immediately
  • Ask for additional answer sheets
  • Examine the booklet for any discrepancies (correct)
  • Leave the examination hall

    • What should students do if they find a faulty booklet during their examination?

    <p>Immediately report it to the invigilator</p> Signup and view all the answers

    What must students tear off before accessing the question booklet?

    <p>Sticker-seal on the edge of the cover page</p> Signup and view all the answers

    What happens if a student accepts a booklet without a sticker-seal?

    <p>They are given a new booklet immediately</p> Signup and view all the answers

    What will happen if a candidate marks their responses anywhere other than the circle on the OMR Sheet?

    <p>The responses will not be evaluated</p> Signup and view all the answers

    What should be done at the end of the booklet for rough work?

    <p>Do rough work at the end of the booklet</p> Signup and view all the answers

    What is the consequence of disclosing identity information on the OMR Sheet?

    <p>The candidate may get disqualified</p> Signup and view all the answers

    What should a candidate do with the original OMR Sheet at the end of the examination?

    <p>Return it to the invigilator</p> Signup and view all the answers

    What color pen should a candidate use to mark their responses?

    <p>Blue/Black ballpoint pen</p> Signup and view all the answers

    What is prohibited during the examination in terms of tools or materials?

    <p>Use of calculator or log table</p> Signup and view all the answers

    Which factor contributes to the magnetic moment besides the spin-only value?

    <p>Orbital contribution to the magnetic moment</p> Signup and view all the answers

    What is the oxidation-reduction reaction that identifies biological nitrification?

    <p>[NH4]+ + 2O2 → [NO3]– + H2O + 2H+</p> Signup and view all the answers

    In an octahedral geometry, what is the Pairing Energy (P) contribution to the Crystal Field Stabilization Energy (CFSE) of a high spin d7 ion?

    <p>P</p> Signup and view all the answers

    How many Electron Paramagnetic Resonance (EPR) lines are observed in the p-dinitro benzene radical anion?

    <p>5</p> Signup and view all the answers

    In which ligand environment is the formation of [Zn–OH]+ more facile at the active site of hydrolytic enzymes?

    <p>(B)</p> Signup and view all the answers

    What is the order of Crystal Field Splitting Parameter (Δ) from highest to lowest among the given coordination complexes?

    <p>[CoF6]3– &gt; [CoF6]4– &gt; [Co(H2O)6]2+</p> Signup and view all the answers

    Which statement is true about the reactivities of chlorine species based on the given Frost diagram?

    <p>ClO4– is a stronger oxidizing agent in basic than in acidic medium</p> Signup and view all the answers

    Which reaction type is exemplified by 3CH3Li + SbCl3 → (CH3)3Sb + 3LiCl?

    <p>Metal-halogen exchange</p> Signup and view all the answers

    Which oxides historically were used to prepare oxygen by decomposition?

    <p>KO2, BaO2, Na2O</p> Signup and view all the answers

    In the context of Pauling's electronegativity scale, which element can hydrogen oxidize?

    <p>Carbon</p> Signup and view all the answers

    Which molecule does not possess Td symmetry?

    <p>$P_4$</p> Signup and view all the answers

    For a copper analysis yielding 42.50% instead of the true 42.92%, what could be the possible reason?

    <p>Presence of impurities affecting results</p> Signup and view all the answers

    Which compound shows peaks at 234, 236, 238 m/e with intensity (1:2:1) in the mass spectrometry spectrum?

    <p>2-Methyl-1,3-butadiene</p> Signup and view all the answers

    Which compound exhibits an absorption at 1815 cm^(-1) in the infrared spectrum?

    <p>Cyclopropane</p> Signup and view all the answers

    In which compound is there only one singlet at 3.7 in the 1H – NMR spectrum?

    <p>1,4-Dibromobenzene</p> Signup and view all the answers

    What would be the major product of the reaction involving 2-Methyl-1,3-butadiene?

    <p>(C)</p> Signup and view all the answers

    For which chemical conversion would Dimethyldioxirane (DMDO) in CH2Cl2 be the most suitable reagent/condition?

    <p>Dimethyldioxirane (DMDO); CH2Cl2</p> Signup and view all the answers

    Which reagents are correct for the conversion involving Vinylmagnesium?

    <p>Vinylmagnesium;</p> Signup and view all the answers

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