Organic Chemistry & Material Design — Chapter quiz · Physical Science: Chemistry, Grade 11

Use carbon structure, polymer properties, and life-cycle evidence to evaluate materials.

Problem 1

A simple acyclic alkene with one double bond has 4 C. Find H count.
Hints

Write the relationship first; substitute with consistent units.

Answer and explanation

8 H atoms

CnH₂n gives 8.

Problem 2

Can every molecule containing −OH be assumed equally soluble in water?
Answer and explanation

No; the size and nonpolar framework matter alongside hydrogen-bonding groups.

Response criteria

  • State a scientifically accurate conclusion.
  • Show the calculation or mechanism that supports it.
  • Include units, conditions, or limits where relevant.

Problem 3

Independent chapter check: Two molecules are CH₃CH₂OH and CH₃OCH₃. Show their shared molecular formula, identify their structural-isomer relationship and distinguish their hydrogen-bond donor roles.
Answer and explanation

Both are C₂H₆O but have different connectivity, so they are structural isomers. Ethanol has an O–H donor; dimethyl ether lacks O–H and does not supply that donor pattern, although its oxygen can accept suitable interactions.

Both are C₂H₆O but have different connectivity, so they are structural isomers. Ethanol has an O–H donor; dimethyl ether lacks O–H and does not supply that donor pattern, although its oxygen can accept suitable interactions.

Response criteria

  • Use the stated measurements or conditions, with correct units.
  • Connect the result to the chemical mechanism or evidence relationship.
  • Identify the assumption, model limit or further evidence requested.

Problem 4

Distinguish monomer from repeat unit.
Answer and explanation

The monomer is a starting molecule; the repeat unit is the recurring structure after reaction and may have different bonding or composition.

Response criteria

  • State a scientifically accurate conclusion.
  • Show the calculation or mechanism that supports it.
  • Include units, conditions, or limits where relevant.

Problem 5

Why compare materials per equal function?
Answer and explanation

Otherwise different use counts or service life can make impact totals misleading.

Response criteria

  • State a scientifically accurate conclusion.
  • Show the calculation or mechanism that supports it.
  • Include units, conditions, or limits where relevant.

Problem 6

Independent chapter check: A part needs load index ≥70. P scores load 80, input 40 and 20 cycles; Q scores load 65, input 24 and 30 cycles; R scores load 90, input 30 and 10 cycles. Select a feasible option by input per cycle and name a missing criterion.
Answer and explanation

Q fails the load constraint. Among feasible P and R, P uses 40/20=2 input units/cycle versus R’s 30/10=3, so P is preferred under this indicator. Cost, failure variability, repair, emissions or end-of-life evidence could change the broader decision.

Q fails the load constraint. Among feasible P and R, P uses 40/20=2 input units/cycle versus R’s 30/10=3, so P is preferred under this indicator. Cost, failure variability, repair, emissions or end-of-life evidence could change the broader decision.

Response criteria

  • Use the stated measurements or conditions, with correct units.
  • Connect the result to the chemical mechanism or evidence relationship.
  • Identify the assumption, model limit or further evidence requested.

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