2nd Year Chemistry First half Book Paper

Q1. Multiple choice questions (Attempt all · 17 × 1 = 17)

1. Reduction is defined as:
   1. Loss of protons
   2. Gain of electrons
   3. Loss of neutrons
   4. Loss of electrons
2. Ethanoic acid is oxidized to carbon dioxide and water by:
   1. Fehling’s solution
   2. KMnO₄
   3. Tollen’s reagent
   4. HCl
3. The point at which moles of acid = moles of base is called:
   1. Endpoint
   2. Neutral point
   3. Equivalence point
   4. Indicator point
4. (+)-Ibuprofen is:
   1. Inactive
   2. Active
   3. Toxic
   4. Neutral
5. 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
6. If overall E° of reaction is positive, the reaction is:
   1. Not feasible
   2. Feasible
   3. Endothermic only
   4. At equilibrium
7. Which aromatic compound is used as an antiseptic?
   1. Nitrobenzene
   2. Phenol
   3. Styrene
   4. Anisole
8. The high tendency of Be²⁺ to form complexes is due to:
   1. Large size and low charge density
   2. Small size and high charge density
   3. Covalent character
   4. Presence of 3d orbitals
9. If Kpc > 1, it means the solute is more soluble in:
   1. Organic solvent
   2. Water
   3. Both equally
   4. None of these
10. Reaction of acyl chloride with primary amines produces:
    1. N-substituted amides
    2. Alcohols
    3. Esters
    4. Aldehydes
11. Industrial chemicals, if mismanaged, mainly cause:
    1. Environmental pollution
    2. Medical advancements
    3. Higher crop production
    4. Clean energy
12. Chlorobenzene undergoes which type of reaction?
    1. Nucleophilic substitution
    2. Electrophilic substitution
    3. Elimination reaction
    4. Hydrolysis
13. In a redox reaction, the oxidizing agent:
    1. Loses electrons
    2. Gains electrons
    3. Loses protons
    4. Gains protons
14. How does chlorine substitution affect the acidity of carboxylic acids?
    1. It increases acidity by donating electrons
    2. It decreases acidity by withdrawing electrons
    3. It increases acidity by withdrawing electrons
    4. It increases acidity by withdrawing hydrogen
15. The mathematical expression for pH is:
    1. pH = log [H⁺]
    2. pH = –log [H⁺]
    3. pH = log [OH⁻]
    4. pH = –log [OH⁻]
16. Geometric isomerism is shown by
    1. alkenes
    2. alkynes
    3. alkanes
    4. lkanes
17. 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