Chemistry Preliminary Exam

All questions for multiple choice are taken from Old HSC Exams, covering new syllabus Preliminary Chemistry content.

15 marks – 25 mins

Questions.

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

C₆H₁₂O₆ = Glucose, fermentation converts glucose into ethanol and carbon dioxide

Question 8.

Question 9.

Question 10.

Question 11.

Question 12.

Question 13.

Question 14.

Question 15.

Answers.

Question 1.

D, chloroethene

Question 2.

C

Question 3.

D

Question 4.

D

Question 5.

B & C is complete combustion, D is not balanced

A is the answer

Question 6.

A

Question 7.

C₆H₁₂O₆ = Glucose, fermentation converts glucose into ethanol and carbon dioxide

D

Question 8.

A

Question 9.

A

Question 10.

If treating with HCl → H⁺ + Cl^–

Cation-carbonate + HCl →  cation-Cl+ H₂O + CO₂

D → lowest molar mass – most moles per gram

Question 11.

Ethanol = C₂H₅OH

1000 g of ethanol * (1 mol / (12.01*2+1.008*6+16.00) g) * (1360 kJ / 1 mol) * (1 km/ 2270 kJ)

B

Question 12.

C

Question 13.

A

Question 14.

B

Question 15.

• Lower activation energy, increase the rate of reaction

A