Nucleophilic Addition Reactions and Carbinolamine Formation Quiz

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Questions and Answers

Which of the following is true about the reaction between aldehydes and Grignard reagents in ether solution?

  • Aldehydes give secondary alcohols (correct)
  • Aldehydes give tertiary alcohols
  • Aldehydes give primary alcohols
  • Aldehydes do not react with Grignard reagents

What is the product of the reaction between a ketone and a Grignard reagent in ether solution?

  • Tertiary alcohol (correct)
  • Primary alcohol
  • No reaction occurs
  • Secondary alcohol

What is the intermediate formed in a Grignard reaction between an aldehyde or ketone and a Grignard reagent?

  • Enamine
  • Carbanion
  • Carbocation
  • Alkoxide (correct)

Which of the following statements about carbonyl groups is true?

<p>Carbonyl groups are electrophilic due to the polarity of the C-O bond. (D)</p> Signup and view all the answers

What is the product of nucleophilic addition of an alcohol to a carbonyl group?

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

What happens in the presence of acid during the reaction of an alcohol with a carbonyl group?

<p>Protonation of the OH group leads to an oxonium ion. (C)</p> Signup and view all the answers

Which of the following is the correct mechanism for the formation of an enamine by reaction of an aldehyde or ketone with a secondary amine, R2NH?

<p>Nucleophilic addition followed by proton transfer (D)</p> Signup and view all the answers

Which of the following is the role of the secondary amine, R2NH, in the formation of an enamine?

<p>It acts as a nucleophile (B)</p> Signup and view all the answers

Which of the following functional groups is formed during the formation of an enamine?

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

Which of the following is a possible product when an aldehyde or ketone reacts with a secondary amine, R2NH, to form an enamine?

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

Which of the following is the equation of a line in slope-intercept form?

<p>y = mx + b (C)</p> Signup and view all the answers

Which of the following is the formula for the area of a circle?

<p>A = pi r^2 (D)</p> Signup and view all the answers

Which of the following is the formula for the Pythagorean theorem?

<p>a^2 + b^2 = c^2 (C)</p> Signup and view all the answers

Which of the following is the quadratic formula?

<p>x = (-b +- sqrt(b^2 - 4ac))/(2a) (C)</p> Signup and view all the answers

Which of the following is the formula for the volume of a rectangular prism?

<p>V = lwh (A)</p> Signup and view all the answers

Which of the following is the equation of a line in slope-intercept form?

<p>$y = 2x + 3$ (B)</p> Signup and view all the answers

Which of the following is the formula for the area of a rectangle?

<p>$A = lw$ (B)</p> Signup and view all the answers

Which of the following is the quadratic formula?

<p>$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ (C)</p> Signup and view all the answers

Which of the following is the formula for the circumference of a circle?

<p>$C = 2\pi r$ (A)</p> Signup and view all the answers

Which of the following is the formula for the volume of a sphere?

<p>$V = \frac{4}{3}\pi r^3$ (C)</p> Signup and view all the answers

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