2nd Year Chemistry Board Pattern Paper 2026

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

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. Hydrolysis of condensed polymers can occur under:
   1. Neutral only
   2. Acidic or basic
   3. Enzymatic only
   4. High pressure only
3. Which compound contributes to inflammation, pain, and fever?
   1. Prostaglandins
   2. Lipids
   3. Hormones
   4. Dopamine
4. The point at which moles of acid = moles of base is called:
   1. Endpoint
   2. Neutral point
   3. Equivalence point
   4. Indicator point
5. 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
6. Cosmetics are mixtures of:
   1. Organic compounds only
   2. Only hydrocarbons
   3. Minerals only
   4. Natural and synthetic chemicals
7. Which database was used to screen molecules when discovering Halicin?
   1. PubChem
   2. DrugBank
   3. ZINC15
   4. ChemSpider
8. Fertilizers increase the natural fertility of the soil or:
   1. Replace lost water
   2. Add pesticides
   3. Increase soil acidity
   4. Replace elements
9. Chlorobenzene undergoes which type of reaction?
   1. Nucleophilic substitution
   2. Electrophilic substitution
   3. Elimination reaction
   4. Hydrolysis
10. Shorter retention times are associated with:
    1. Polar components with lower boiling points
    2. Non-polar components with high boiling points
    3. Metals
    4. Solvent molecules only
11. If overall E° of reaction is positive, the reaction is:
    1. Not feasible
    2. Feasible
    3. Endothermic only
    4. At equilibrium
12. Industrial chemicals, if mismanaged, mainly cause:
    1. Environmental pollution
    2. Medical advancements
    3. Higher crop production
    4. Clean energy
13. The abundance of M+1 peak depends mainly on:
    1. Hydrogen atoms
    2. Oxygen atoms
    3. Carbon atoms
    4. Nitrogen atoms
14. Spectroscopy is based on the interaction of atoms or molecules with:
    1. Heat
    2. Sound waves
    3. Electromagnetic radiations
    4. Chemical reactions
15. (+)-Ibuprofen is:
    1. Inactive
    2. Active
    3. Toxic
    4. Neutral
16. Reduction is defined as:
    1. Loss of protons
    2. Gain of electrons
    3. Loss of neutrons
    4. Loss of electrons
17. Optimum temperature for human enzymes is about:
    1. 0°C
    2. 25°C
    3. 37°C
    4. 60°C