5. What is the role of acetic acid during synthesis of methyl orange dye? ( poi

Question

5. What is the role of acetic acid during synthesis of methyl orange dye? ( poi t) c) As an acid Protonation of Dimethyl Aniline b) Protonation of Sulfani ilic acid catalyst d) All of the above 16. What is the main p a) e of a pH indicator? (1 point) b) Bxhibit change in color with respect to change in pH Determine pKa c) Exhibit different ionic forms at different pH hydronium/hydrogen ions. d) Chemical detection of 17. Which one of the following statements is wrong? (1 point) a) Using UV absorption-Electronic tran b) Using IR absorpt )In NMR spectroscopy-Radio-frequency electromagnetic radiation is used d) sitions are understood Using UV absorption-Number of valence electrons can be identified

Explanation / Answer

15) A

( We dissolve the dimethylaniline in acetic acid. This forms the dimethylaniline acetate salt. Neutralize this in situ and the dimethylaniline becomes a good nucleophile due to the activating effect of the dimethylamine substituent. Attack is in the para position due to hindrance at the ortho position by the bulky dimethylamine substituent.)

16) B ( The purpose for indicatiors in chemistry is to know what the approxment pH of a solution would be when it's under going a chemical change. Indicators often change colors only in a small range on the pH scale. Be sure to chose the right one for your experiment other wise you may miss the equivelance point. )

17) D ( The absorption of UV or visible radiation corresponds to the excitation of outer electrons.but cant identify number of valance electrons)

Answers you have marked are correct

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.