8 public questions tagged with this topic.
Density increases with molecular weight for similar structures. CH₃I (iodomethane) has the highest density among CH₃X compounds.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
log 2.25 ≈ 0.352 → Ea ≈ 62.7 kJ mol⁻¹.
Ref: NCERT Class 12 Chemistry > Chapter 3: Chemical Kinetics > Topic: Temperature Dependence - Arrhenius Equation and Activation Energy
Molality = (moles/mass of solvent in kg) = (0.02/0.8) = 0.025 mol/kg . Cross-check: x = (7/350) = 0.02 , slightly off due to approximation, but molality is direct.
Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Vapour Pressure and Raoult's Law - Ideal and Non-ideal Solutions
Liquid phase: 310 = 250 x₁ + 350 (1 - x₁) . 310 = 250 x₁ + 350 - 350 x₁ , 100 x₁ = 40 , x₁ = 0.4 , x₂ = 0.6 . Vapor phase: y₁ = (P₁⁰ · x₁/Ptotal) = (250 × 0.4/310) ≈ 0.3226 .
Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Vapour Pressure and Raoult's Law - Ideal and Non-ideal Solutions
Kp = Kc (RT)Δ n , Δ n = 2 - 1 = 1 , RT = 0.0831 × 298 ≈ 24.76 . Thus, Kc = (Kp/RT) = (0.98/24.76) ≈ 0.04 .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Chemical Equilibrium - Law of Mass Action and Equilibrium Constant
Kp = Kc (RT)Δ n , Δ n = 1 - 2 = -1 , RT = 0.0831 × 500 = 41.55 . Thus, Kc = Kp × RT = 0.1 × 41.55 = 4.155 .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Chemical Equilibrium - Law of Mass Action and Equilibrium Constant
Entropy decreases when disorder decreases, e.g., H₂O(l) → H₂O(s), as liquid to solid reduces randomness.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Heat Capacity and Calorimetry and Measurement of Enthalpy
Atomic mass and surface area is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Atomic mass and surface area directly address what is being asked. Among the other options, Electronegativity, Atomic number, and Molecular polarity do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.
