2nd Year Chemistry Chapter 10 Test10. Hydroxy Compounds

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. What is the product when phenylamine reacts with HNO₂ or NaNO₂ and dilute acid below 10°C?
   1. Aniline
   2. Phenol
   3. Benzene diazonium chloride
   4. Nitrobenzene
2. Phenol is more reactive than benzene because:
   1. –OH group withdraws electrons
   2. –OH group donates electrons to ring
   3. –OH group forms aldehyde
   4. –OH group oxidizes rapidly
3. The Ka value of phenol is approximately:
   1. 1.8 × 10⁻¹⁶
   2. 1.3 × 10⁻¹⁰
   3. 1.26 × 10⁻¹⁶
   4. 1.0 × 10⁻¹⁴
4. Addition of bromine water to phenol solution produces:
   1. 2-bromophenol
   2. 4-bromophenol
   3. 2,4,6-tribromophenol
   4. Benzyl bromide
5. In the nitration of phenol, why are milder conditions required compared to benzene?
   1. Phenol is less reactive than benzene
   2. The hydroxyl group in phenol activates the ring
   3. Benzene is more reactive
   4. Phenol is inert
6. Which positions does the hydroxyl group of phenol direct electrophilic substitution to?
   1. 2 and 3
   2. 3 and 4
   3. 2, 4, and 6
   4. 2 and 4
7. Which alcohol is used in alcoholic beverages?
   1. Methanol
   2. Ethanol
   3. Propanol
   4. Isopropanol
8. Azo-dyes are characterized by:
   1. –OH group
   2. –NO₂ group
   3. –N=N– group
   4. –CHO group
9. The simplest alcohol is:
   1. Ethanol
   2. Phenol
   3. Methanol
   4. Isopropanol
10. Which compound is also called α-naphthol?
    1. 2-Naphthol
    2. 1-Naphthol
    3. Phenol
    4. Methanol