Question Detail The ejection of electrons when a metal surface is irradiated is known as Black body radiationPhotoelectric effectZeeman effectAtomic spectrum Answer: Option B Ad Similar Questions : 1. Contact lenses are made from ? Polyvinyl chlorideTeflonPolystyreneLucite Answer: Option A 2. The most abundant element in the earth's crust is ? AluminiumNitrogenSiliconOxygen Answer: Option D 3. Which one is an organic Acid ? SulphuricCitricNitricPhosphoric Answer: Option B 4. Petroleum is found in ? Marshy landMetamorphic rocksIgneous rockSedimentary rocks Answer: Option D 5. Enzymes are Fatty acidsCarbohydratesNucleic acidsProteins Answer: Option D Read more from - Chemistry Questions Answers