HSLC Science Most Probable Questions 2027

Science in the SEBA HSLC exam is heavily based on concepts, applications, and diagrams. Here is our curated list of the most probable questions for the 2027 exam, based on extensive PYQ analysis.

1. Chemical Reactions and Equations

• Why should a magnesium ribbon be cleaned before burning in air?
• What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer.
• Balance the following chemical equations.

2. Acids, Bases and Salts

• Why does an aqueous solution of an acid conduct electricity?
• Plaster of Paris should be stored in a moisture-proof container. Explain why.
• What is a neutralization reaction? Give two examples.

6. Life Processes

• Draw a neat and labeled diagram of the human alimentary canal.
• What are the differences between aerobic and anaerobic respiration?
• Describe double circulation in human beings. Why is it necessary?

12. Electricity

• State Ohm's Law. How can it be verified experimentally?
• Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
• Numerical problems on equivalent resistance in series and parallel circuits.