General Science and Ability

**The richest source of Riboflavin is:**A) PapayaB) MangoC) BaelD) None of these Show Answer Correct Answer: D – None of these (Liver or yeast)

**The Pakistani population receives the largest dose of ionizing radiation from:**A) Natural sourcesB) Fallout from nuclear weapons testingC) Nuclear medicineD) Nuclear power plants Show Answer Correct Answer: A – Natural sources

**Which are air pollutants?**A) AerosolsB) SewageC) DDTD) Fertilizers Show Answer Correct Answer: A – Aerosols

**Which of the following does not cause soil erosion?**A) WindB) OvergrazingC) SunD) Water Show Answer Correct Answer: C – Sun

**The gas associated with global warming is:**A) CO₂B) H₂SC) CH₄D) SO₂ Show Answer Correct Answer: A – CO₂

**In water pollution, industries are said to be the:**A) Line sourcesB) Point sourcesC) Area sourcesD) None of these Show Answer Correct Answer: B – Point sources

**Among the following, the only secondary pollutant is:**A) Sulphur peroxideB) Sulphur dioxide (SO₂)C) OzoneD) None of these Show Answer Correct Answer: C – Ozone

**Which of the following groups of plants can be used as indicators of SO₂ pollution of air?**A) Epiphytic lichensB) FernsC) LiverwortsD) Hornworts Show Answer Correct Answer: A – Epiphytic lichens

**Prevailing winds affect a region’s climate by:**A) Creating desert areasB) Causing more precipitation on one side of a mountainC) Affecting how much precipitation it receivesD) Controlling the amount of solar energy it receives Show Answer Correct Answer: C – Affecting how much precipitation it receives

**The carbohydrate content in potato (per 100g) is:**A) 18gB) 20.13gC) 25gD) 26g Show Answer Correct Answer: B – 20.13g