Hsc Chemistry Past Paper
Student Number
Mark / 100
2011
TRIAL HSC EXAMINATION
Chemistry
General Instructions
• • • • • • • Reading time – 5 minutes Working time – 3 hours Write using black or blue pen Draw diagrams using pencil Board-approved calculators may be used A data sheet and a Periodic Table are provided. Write your Student Number at the top of this page and those of pages 10 and 11.
Total Marks – 100 Section I Pages 2 – 24
Confidential Keep Secure
75 marks
This section has two parts, Part A and Part B Part A –20 marks •Attempt Questions 1- 20 •Allow about 35 minutes for this part Part B – 55 marks •Attempt Questions 21 – 32 •Allow about 1 hour and 40 minutes for this part Pages 25 – 26
Section II 25 marks
•Attempt Question 33 •Allow about 45 minutes for this section …show more content…
Ozone exhibits greater reactivity than the oxygen molecule. Which statement best explains this? (A) (B) Ozone has a bent structure which makes it more polar than oxygen Ozone has three oxygen atoms so it is a stronger oxidizing agent than oxygen which has two atoms. Ozone has a higher molecular mass hence dispersion forces are greater. Ozone has a single covalent bond which is more easily broken than the double covalent bond in oxygen.
(C) (D)
15.
What are the volumes in litres of 1 mole of helium gas and 1 mole of nitrogen gas respectively at 25 oC and 100 kPa ? (A) (B) (C) (D) 12.40 L and 24.79 L 24.79 L and 24.79 L 4.0 L and 28.0 L 22.71 L and 22.71 L
16.
Which of the following changes will always shift equilibrium to the left ? 2HI(g) (A) (B) (C) (D) H2(g) adding a catalyst increasing pressure increasing temperature adding more reactant + I2(g) ∆H = – 52 kJ mol-1
Mark / 100
2011
TRIAL HSC EXAMINATION
Chemistry
General Instructions
• • • • • • • Reading time – 5 minutes Working time – 3 hours Write using black or blue pen Draw diagrams using pencil Board-approved calculators may be used A data sheet and a Periodic Table are provided. Write your Student Number at the top of this page and those of pages 10 and 11.
Total Marks – 100 Section I Pages 2 – 24
Confidential Keep Secure
75 marks
This section has two parts, Part A and Part B Part A –20 marks •Attempt Questions 1- 20 •Allow about 35 minutes for this part Part B – 55 marks •Attempt Questions 21 – 32 •Allow about 1 hour and 40 minutes for this part Pages 25 – 26
Section II 25 marks
•Attempt Question 33 •Allow about 45 minutes for this section …show more content…
Ozone exhibits greater reactivity than the oxygen molecule. Which statement best explains this? (A) (B) Ozone has a bent structure which makes it more polar than oxygen Ozone has three oxygen atoms so it is a stronger oxidizing agent than oxygen which has two atoms. Ozone has a higher molecular mass hence dispersion forces are greater. Ozone has a single covalent bond which is more easily broken than the double covalent bond in oxygen.
(C) (D)
15.
What are the volumes in litres of 1 mole of helium gas and 1 mole of nitrogen gas respectively at 25 oC and 100 kPa ? (A) (B) (C) (D) 12.40 L and 24.79 L 24.79 L and 24.79 L 4.0 L and 28.0 L 22.71 L and 22.71 L
16.
Which of the following changes will always shift equilibrium to the left ? 2HI(g) (A) (B) (C) (D) H2(g) adding a catalyst increasing pressure increasing temperature adding more reactant + I2(g) ∆H = – 52 kJ mol-1