General Science and Ability

**Permanent hardness of water is due to the presence of:**A) Calcium bicarbonateB) Magnesium bicarbonateC) Calcium sulphateD) Sodium bicarbonate Show Answer Correct Answer: C – Calcium sulphate

**H⁺ is yielded by:**A) AcidsB) AlkalisC) Both A and BD) None of these Show Answer Correct Answer: A – Acids

**The number of bones in the human body is:**A) 200B) 202C) 204D) 206 Show Answer Correct Answer: D – 206

**The unavailability of internal energy for conversion into mechanical work is called:**A) EntropyB) ThermodynamicsC) NegentropyD) None of these Show Answer Correct Answer: A – Entropy

**Which vessel provides blood to the liver?**A) Hepatic portal arteryB) VeinsC) ArteriesD) None of these Show Answer Correct Answer: D – None of these (Hepatic portal vein)

**A bronze medal is made up of which metals?**A) Copper, nickelB) Copper, tinC) Copper, silverD) None of these Show Answer Correct Answer: B – Copper, tin

**What is not included in the Earth’s environment?**A) LithosphereB) StratosphereC) BiosphereD) None of these Show Answer Correct Answer: D – None of these (All are included)

**The loudness of sound depends on its:**A) WavelengthB) FrequencyC) AmplitudeD) None of these Show Answer Correct Answer: C – Amplitude

**Control rods of which element are used in a nuclear reactor?**A) CadmiumB) CopperC) GraphiteD) None of these Show Answer Correct Answer: A – Cadmium

**Which country lies on the equator?**A) KenyaB) ChinaC) BhutanD) El Salvador Show Answer Correct Answer: A – Kenya