Uses of Selenium (Se) in Everyday Life
From the Selenium page's study notes: Selenium (Se) serves in alloys, infrastructure and the technologies of daily life. The full list, with Bangladesh examples, sits below.
This is the fast lane: one page, one fact, zero digressions. Read the quick answer, check the table, and if your exam needs the full derivation, the sections below walk through it step by step — in Bangla and English, like every page here. Need the whole picture instead — history, characteristics, uses, exam questions? The full Selenium page is one click away.
Selenium at work around you
Every use below comes straight from the full Selenium study page, where each point also carries the chemistry behind it and an exam-style question. Skim the list here; open the full page when revision time comes.
Uses of Selenium in the study notes
- Selenium sulfide () shampoo — the anti-dandruff classic, Selsun and its kin — slows the Malassezia yeast whose feasting flakes the scalp.
- The first photocopiers: Xerox’s original machines ran on drums coated with amorphous selenium, whose charged, light-struck surface herded toner into crisp copies.
- The glass-maker’s secret: a pinch of selenium erases the green tint that iron leaves in glass; a bigger dose stains glass rose-red, and cadmium selenide makes fire-engine-red pigments.
- Grandparent of solar power: Charles Fritts’s 1883 selenium cell was the first solid plate to turn sunlight into electric current — ancestor of every rooftop panel today.
- Feed and supplements: selenium yeast and sodium selenite top up poultry and livestock feed, guarding animals against selenium-deficiency diseases.
Where you meet it
- Check the medicine shelf: the anti-dandruff shampoo bottle lists “selenium sulfide” right on its label.
- Brazil nuts are the selenium champions of the food world — a single nut can carry a whole day’s allowance, while rice from poor soils carries far less.
- Vintage camera light meters with a honeycomb window needed no battery — a selenium strip made electricity straight from light.
Students also ask
Why is Selenium important in Bangladesh?
The full study page connects Selenium to Bangladeshi life — school labs, local industries, health and the NCTB syllabus. This quick-answer page is the fast summary; the element page is the full story.
Where will I meet Selenium in the NCTB exam?
Questions on Selenium's uses are a recurring pattern in Class 9–10 and HSC chemistry. The element page ends with six exam-style questions in both languages — practise those and this pattern stops costing marks.