Q9: Islamic Studies MCQ 2012

**An igneous rock contains a radioactive isotope that has a half-life of 10 million years. Careful analysis shows that only one quarter of the original concentration of the parent isotope is left. How old is this igneous rock?**A) 10 million yearsB) 20 million yearsC) 30 million yearsD) 40 million years Show Answer Correct Answer: B…

**Polyamides are synthetic polymers commonly known as:**A) Synthetic rubberB) NylonC) CelluloseD) Protein Show Answer Correct Answer: B – Nylon

**What is Hubble classification:**A) Classification of starsB) Classification of planetsC) Classification of galaxiesD) Classification of Earth’s zones Show Answer Correct Answer: C – Classification of galaxies

**To measure the specific gravity of milk, the instrument used is:**A) HygrometerB) BarometerC) LactometerD) Hydrometer Show Answer Correct Answer: C – Lactometer