10th Class Chemistry Chapter 10 Test10. Hydroxy Compounds

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

1. Alcohol swabs are commonly used to disinfect the skin:
   1. After meals
   2. Before injection or surgery
   3. During exercise
   4. For cosmetic use only
2. Corn-based ethanol reduces greenhouse gas emissions by roughly:
   1. 10–20%
   2. 25–30%
   3. 40–50%
   4. 60–70%
3. Alcohols are effective in sanitizing:
   1. Metals only
   2. Surfaces and hands
   3. Food items
   4. Plastic materials
4. What is the chemical formula of ethanol?
   1. $CH_3OH$
   2. $C_2H_6$
   3. $C_2H_5OH$
   4. $C_3H_7OH$
5. Which substance is used as a dehydrating agent to obtain absolute ethanol?
   1. H₂SO₄
   2. HCl
   3. NaOH
   4. HNO₃
6. Alcohols are commonly used in:
   1. Plastics and metals
   2. Household and industrial cleaners
   3. Fertilizers and crops
   4. Cement and concrete
7. Which of the following is NOT a product where alcohol is used in the cosmetic industry?
   1. Deodorants
   2. Skin lotions
   3. Toners
   4. Fertilizers
8. Ethanol has a higher _______ number than gasoline.
   1. Hydrogen
   2. Carbon
   3. Octane
   4. Methane
9. Which industry uses alcohol extensively as a solvent?
   1. Agriculture
   2. Pharmaceuticals
   3. Mining
   4. Construction
10. What is the catalyst used in the catalytic hydration of ethene to ethanol?
    1. Sulfuric acid
    2. Hydrochloric acid
    3. Phosphoric acid
    4. Nitric acid