Entrance Exam Semmelweis Questions With Verified Solutions 2024/2025

Entrance Exam Semmelweis Questions With Verified Solutions 2024/2025 Electron configuration for cations Correct Answer: Subtract 1 from exponent of highest n-value orbital (ex. remove from 4s before 3d) Ag+ = [Kr]5s^1 4d^9 Electron configuration for anions Correct Answer: Add 1 to closest orbital Cl- = [Ne]3s^2 3p^6 Atomic orbitals Correct Answer: s, p, d, f Primary vs secondary structures of proteins Correct Answer: Primary - AA chain (linked by peptide bonds) Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets) Most bonds in organic compounds are Correct Answer: covalent Properties of water Correct Answer: 1. polar 2. capable of adhesion and cohesion 3. high heat capacity (so it's hard to raise its temp) 4. great solvent 5. high heat of vaporization (allows humans to cool off via sweat) 6. water is less dense as a solid than a liquid Intermolecular forces of water Correct Answer: hydrogen bonding Solution components Correct Answer: 1. solvent (product being dissolved) 2. solute (medium for dissolving solvent) Molarity Correct Answer: the number of moles of solute per liter of solution Solubility rules Correct Answer: SOLUBLE 1. alkali metals (group 1) & NH4+ cations 2. NO3- or CH3COO- anions 3. Cl, Br, I (except when bonded to Ag+, Pb2+ or Hg2+) 4. sulfate ions (except when with Ca2+, Sr2+, Ba2+, Pb2+) INSOLUBLE 1. Metal oxides (except CaO, SrO, BaO) 2. Hydroxides (except when with Ca2+, Sr2+, Ba2+) 3. Carbonates, phosphates, sulfides, and sulfites (unless bound to alkali metal or NH4+) Solubility product Correct Answer: Ksp = [A]^a[B]^b