How to handle SPM Chemistry questions you cannot do

Every SPM Chemistry candidate meets a question they cannot immediately do. The difference between a strong script and a weak one is often not who avoids that moment, but who handles it well. Panic, or twenty minutes spent frozen on one part, can quietly cost you marks on questions you could have answered. This post is about what to actually do when a question stops you.

First, do not freeze, flag it and move on

The most expensive mistake is staring at a hard question while the clock runs down. If a question does not open up within a minute or so, put a small mark beside it, leave a space, and move to the next one. The marks further down the paper are just as valuable and often easier. You can come back with a calmer head once you have banked the questions you can do. Protecting your time is the single most important exam-hall skill, because a blank on an easy later question costs exactly as much as a blank on the hard one that trapped you.

Come back with fresh eyes

Questions look different on a second visit. Once you have worked through the rest of the paper, a stem that seemed impossible often clicks, a later question may have reminded you of the right idea, or simply stepping away breaks the mental loop you were stuck in. Leave enough time at the end to return to your flagged questions, and attempt them properly rather than in a last-second scramble.

Salvage partial marks, write what you do know

Even when you cannot finish a question, you can almost always score something, because SPM marks are awarded for parts of an answer, not only for the complete one. On a structured or essay question:

• Write the balanced equation if you can, with state symbols, that alone may be a mark.
• Define any key term the question uses. A definition you know is a free mark even if the rest defeats you.
• Start the calculation you can start: write the formula and substitute the values you have. Method marks are given for correct working even when you cannot reach the final number.
• State any relevant observation, colour or gas test you remember.

A blank scores zero with certainty; a partial attempt can collect a mark or two, and those marks add up across a paper. Our guide to how the marking scheme works shows how these part-marks are allocated, so you can see exactly what a partial answer is worth.

In Paper 1, never leave an objective blank

Paper 1 is multiple choice with no penalty for a wrong answer, so a blank is simply a thrown-away chance. If you cannot work out an answer, use elimination: rule out any option you know is wrong, an equation that is not balanced, a colour that is incorrect, a definition that is false, and choose from what remains. Cutting four options down to two doubles your odds. Mark the question so you can revisit it, but always leave an answer bubbled in, because an educated guess can score and a blank never can.

Attempt the structure even when you are unsure

In Paper 2, a question you are unsure about is still worth structuring properly. Answer the command word as best you can: give a fact for “state”, offer a reason for “explain” even if you are not certain it is complete. Examiners reward chemically sensible reasoning, and a well-aimed attempt often earns more than you expect. Writing nothing scores nothing; writing your best chemistry gives the marker something to credit.

Keep one hard question from sinking the paper

The real danger of a question you cannot do is emotional, not mathematical. One tough part early on can shake your confidence and bleed into everything after it. Have a simple reset ready: take one slow breath, remind yourself that a single question is only a few marks out of the whole paper, and move on deliberately. Students who keep their composure routinely out-score students who know more chemistry but let one question rattle them. The paper is a total, not a single question, treat every remaining mark as still there to be won.

Prepare so fewer questions stump you

The best long-term answer is to widen what you can do, so fewer questions catch you out. Honest self-assessment tells you where your gaps are, our free self-assessment quiz helps you rate yourself across recall, calculations, practical work and essays, so your revision targets the topics most likely to trip you in the exam. The fewer blind spots you carry in, the fewer questions will stop you.

Composure is a scoring skill

Handling a hard question well is a skill you can practise, not a personality trait. Do timed past papers so that flagging, moving on and coming back become automatic, and so the exam hall holds no surprises. If you would like a teacher to build these exam habits with you and strengthen the topics you are least sure of, our online one-to-one lessons run in English from RM50 an hour, with a paid one-hour trial, our experienced SPM Chemistry teachers and our team coach both the chemistry and the calm that lets you use it.