2nd Year Chemistry Full Book Paper

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

1. Which database was used to screen molecules when discovering Halicin?
   1. PubChem
   2. DrugBank
   3. ZINC15
   4. ChemSpider
2. Which aromatic compound is used as an antiseptic?
   1. Nitrobenzene
   2. Phenol
   3. Styrene
   4. Anisole
3. Two peaks in the chlorine mass spectrum show that:
   1. Chlorine has one isotope
   2. Chlorine has two isotopes
   3. Chlorine is monoisotopic
   4. Chlorine is a mixture with hydrogen
4. Industrial chemicals, if mismanaged, mainly cause:
   1. Environmental pollution
   2. Medical advancements
   3. Higher crop production
   4. Clean energy
5. Ethanoic acid is oxidized to carbon dioxide and water by:
   1. Fehling’s solution
   2. KMnO₄
   3. Tollen’s reagent
   4. HCl
6. Reaction of acyl chloride with primary amines produces:
   1. N-substituted amides
   2. Alcohols
   3. Esters
   4. Aldehydes
7. If overall E° of reaction is positive, the reaction is:
   1. Not feasible
   2. Feasible
   3. Endothermic only
   4. At equilibrium
8. Reduction is defined as:
   1. Loss of protons
   2. Gain of electrons
   3. Loss of neutrons
   4. Loss of electrons
9. Which of the following is one of the strongest materials known?
   1. Silver
   2. Graphene
   3. Diamond
   4. Plastic
10. Spectroscopy is based on the interaction of atoms or molecules with:
    1. Heat
    2. Sound waves
    3. Electromagnetic radiations
    4. Chemical reactions
11. Cosmetics are mixtures of:
    1. Organic compounds only
    2. Only hydrocarbons
    3. Minerals only
    4. Natural and synthetic chemicals
12. 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
13. Hydrolysis of condensed polymers can occur under:
    1. Neutral only
    2. Acidic or basic
    3. Enzymatic only
    4. High pressure only
14. Fertilizers increase the natural fertility of the soil or:
    1. Replace lost water
    2. Add pesticides
    3. Increase soil acidity
    4. Replace elements
15. 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
16. (+)-Ibuprofen is:
    1. Inactive
    2. Active
    3. Toxic
    4. Neutral
17. If Kpc > 1, it means the solute is more soluble in:
    1. Organic solvent
    2. Water
    3. Both equally
    4. None of these