Caribbean Secondary Education Certificate® Examination 2018 Chemistry Paper 01 - General Proficiency Notes

General Information
- Test Code: 01212010
- Duration: 1 hour 15 minutes
- Date: 08 June 2018 (p.m.)
- This test consists of 60 items
- Each question has four options: (A), (B), (C), (D)
- Candidates must print their name on the designated line and return the booklet with answer sheets. Failure to do so may result in disqualification.

Instructions

Read all instructions carefully before beginning.
Use a silent, non-programmable calculator if needed.
You are allowed to do rough work in the booklet.
Figures in the booklet are not necessarily drawn to scale.
If uncertain about an item, skip it and return later.

Sample Question

Question Examined: The SI unit of length is:
- (A) metre
- (B) newton
- (C) second
- (D) kilogram
- Correct Answer: (A) metre
- Answering Method: Shade the space corresponding to chosen answer on the answer sheet.

Core Content

Sample Items

1. Matter and Particles:

Question: Which of the following processes suggests that matter is made up of minute particles?
Options:
- (A) Diffusion
- (B) Capillarity
- (C) Evaporation
- (D) Distillation

2. Mass Number:

Concept: 'Mass number' is defined as the number of
- (A) neutrons plus protons
- (B) neutrons minus protons
- (C) electrons plus neutrons
- (D) electrons plus protons

3. Exothermic Reactions:

Question: When an exothermic reaction occurs, energy is:
- (A) absorbed from the environment
- (B) released to the environment
- (C) absorbed from the reactants
- (D) released from the products

Isotopes

Question: Which of the following pairs of elements are isotopes?
- (A) Q and R
- (B) R and T
- (C) Q and S
- (D) S and T

Atoms and Ions

Question: Best describes the difference between an atom and an ion:
- (A) An atom is electrically neutral but an ion is positively charged.
- (B) An atom is electrically neutral but an ion is negatively charged.
- (C) An atom contains equal numbers of protons and electrons whereas an ion contains more electrons than protons.
- (D) An atom contains equal numbers of protons and electrons whereas an ion contains unequal numbers of protons and electrons.

Reactions with Water

Question: Barium is below calcium in Group II of the Periodic Table. When both metals react with water, the main observed differences would be:
- (A) rate of reaction and type of product
- (B) type of gas evolved
- (C) reaction with litmus
- (D) solubility of the product

Acids and Bases

Question: In the electrolysis of copper(II) sulfate solution using copper electrodes, what happens at the anode?
- (A) Increases in mass
- (B) Decreases in mass
- (C) Undergoes no change in mass
- (D) Is the site where reduction occurs

Conductivity of Solutions

Question: Which of the following aqueous solutions contains 1 mole of hydrogen ions?
- (A) 2 dm³ of 0.5 mol dm⁻³ HCl
- (B) 2 dm³ of 0.5 mol dm⁻³ H₂SO₄
- (C) 1 dm³ of 1.0 mol dm⁻³ H₂SO₄
- (D) 1 dm³ of 1.0 mol dm⁻³ CH₂COOH

Note: Continue structuring notes similarly for all items discussed in the provided transcript. Document definitions, concepts, specific items, relevant examples, and details comprehensively.