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Chapter 3: Problem 139

(a) phenyl benzoate (b) phenolphthalein (c) Fluorescein (d) \(\mathrm{p}\) -hydroxyazobenzene

Short Answer

Expert verified
Answer: Phenyl benzoate is an organic compound with a formula of \(\mathrm{C}_{13}\mathrm{H}_{10}\mathrm{O}_{2}\). Its structure consists of a phenyl group attached to the carbonyl carbon of a benzoate group. Some properties of phenyl benzoate include its white crystalline solid form and its mild aromatic odor. It is used as an intermediate for the synthesis of other chemical compounds, and as a fragrance and flavor ingredient.

Step by step solution

01

1. Phenyl Benzoate

Phenyl benzoate is an organic compound with a formula of \(\mathrm{C}_{13}\mathrm{H}_{10}\mathrm{O}_{2}\). It's an ester derived from benzoic acid and phenol. The structure of phenyl benzoate consists of a phenyl group attached to the carbonyl carbon of a benzoate group. Some properties of phenyl benzoate include its white crystalline solid form and its mild aromatic odor. It is used as an intermediate for the synthesis of other chemical compounds, and as a fragrance and flavor ingredient.
02

2. Phenolphthalein

Phenolphthalein is an organic compound with a formula of \(\mathrm{C}_{20}\mathrm{H}_{14}\mathrm{O}_{4}\). It belongs to a group of compounds called pH indicators, which change color depending on the acidity or alkalinity of a solution. Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions. Its molecular structure has three benzene rings connected with a central carbon atom. It's widely used as an acid-base indicator in chemical titrations and also as a laxative in some medications.
03

3. Fluorescein

Fluorescein is an organic compound with a formula of \(\mathrm{C}_{20}\mathrm{H}_{12}\mathrm{O}_{5}\). It is a highly fluorescent and green-colored molecule due to its ability to absorb and emit light at certain wavelengths. The structure of fluorescein consists of two fused benzene rings connected to another benzene ring via a xanthene group. It is widely used as a fluorescent tracer dye in various applications, such as tracing water flow, biological staining, and medical diagnostics.
04

4. \(\mathrm{p}\)-Hydroxyazobenzene

\(\mathrm{p}\)-hydroxyazobenzene is an organic compound with a formula of \(\mathrm{C}_{12}\mathrm{H}_{10}\mathrm{N}_{2}\mathrm{O}\). Its molecular structure contains two benzene rings joined together with an azo group (-N=N-). One of the benzene rings contains a hydroxy group (-OH) in the para-position (opposite to the azo group). \(\mathrm{p}\)-hydroxyazobenzene displays various optical properties due to its molecular structure and can be used as a photochromic and pH indicator. In addition, it has certain biological applications as an anticancer agent due to its ability to bind to DNA.

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Most popular questions from this chapter

\(\frac{\mathrm{CCl}_{3} \mathrm{CHO}}{\mathrm{K}_{2} \mathrm{CO}_{3}} \rightarrow\) (A) \(\frac{\mathrm{Na}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\mathrm{NaOH}} \longrightarrow(\mathrm{B}) .\) The major product (b) is

The increasing order of acidic strength among p-methoxyphenol, p-cresol and p-nitrophenol is (a) p-cresol \(<\) p-methoxyphenol \(<\) p-nitrophenol (b) p-methoxyphenol \(<\) p-cresol \(<\) p-nitrophenol (c) \(\mathrm{p}\) -cresol \(<\mathrm{p}\) -nitrophenol \(<\mathrm{p}\) -methoxyphenol (d) p-methoxyphenol \(<\) p-nitrophenol \(<\mathrm{p}\) -cresol

The product formed when phenol is treated with \(\mathrm{H}_{2} / \mathrm{Ni}\) at \(475^{\circ} \mathrm{C}\) is (a) Cyclohexanol (b) Toluene (c) Cyclohexane (d) Cyclopentane

Statement 1 Phenoxide ion is more reactive than phenol towards electrophiles. and Statement 2 Phenoxide ion is stabilized more by resonance than phenol.

Which of the following reactions of phenol is used for its quantitative estimation? (a) Reaction with bromine (b) Reaction with con. \(\mathrm{HNO}_{3}\) (c) Reaction with \(\mathrm{FeCl}_{3}\) solution (d) Reaction with \(\mathrm{CO}_{2}\)
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