Verifying alkane formulas and properties

Steps:

• Recall alkanes follow the general formula C_nH_{2n+2} for straight-chain molecules.
• For option D, substitute n=35: 2(35)+2=72 hydrogens, yielding C_{35}H_{72}.
• Eliminate A: Alkanes undergo free radical substitution with Cl_2, not addition (which is for alkenes).
• Eliminate B and C: B misdefines saturation (it's about single bonds, not solubility); C's comparison is incomplete and unevaluable.

Why D is correct:

• It matches the general formula C_nH_{2n+2}, a defining law for alkanes.

Why the others are wrong:

• A: Substitution, not addition, occurs with halogens due to saturated nature.
• B: "Saturated" describes maximum H atoms and single bonds only; insolubility stems from nonpolarity.
• C: Statement lacks full comparison (e.g., to a specific alkane), rendering it invalid.

Final answer: D