Form 4 Chemistry Bab 1: Introduction to Chemistry
Instructions
Answer all questions thoroughly based on Chapter 1: Introduction to Chemistry.
10 questions · 22 marks total
1. Describe the correct procedure to manage a small mercury spill on a laboratory bench.
Short Answer · 3m2. An experiment is carried out to investigate how the temperature of water affects the dissolving rate of sugar. Identify:
(a) Manipulated variable
(b) Responding variable
(c) Two fixed variables
3. State two examples of chemical chemicals used as food preservatives in the food industry.
Short Answer · 2m4. A student accidentally spills concentrated hydrochloric acid onto his lab coat and arm. Outline the immediate action steps required to safely handle this emergency.
Short Answer · 4m5. Which item of apparatus should be used when handling volatile chemicals that release hazardous vapors?
Multiple Choice · 1m6. True or False: Mercury spills can be safely cleaned up using water and a cotton cloth.
True / False · 1m7. Identify three types of variables involved in a scientific investigation and briefly define each.
Short Answer · 3m8. Fill in the blank: The word 'chemistry' originates from the Arabic word ________.
Fill in the Blank · 1m9. Define what a 'hypothesis' is in a scientific investigation.
Short Answer · 2m10. True or False: Alkali metals such as sodium and potassium must be stored under paraffin oil.
True / False · 1m