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

**The density of three liquids are D, 2D, and 3D. What will be the density of the resulting mixture if equal volumes of the three liquids are mixed?**A) 1.5DB) 2DC) 3DD) 6D Show Answer Correct Answer: B – 2D

**Articles made of copper and bronze slowly tarnish in air and turn green; the green color is due to the formation of:**A) Copper oxideB) Copper sulphideC) Copper oxalateD) None of these Show Answer Correct Answer: D – None of these

**Which of the following is a conventional designation of pre-released software?**A) RawB) AlphaC) OmegaD) Beta Show Answer Correct Answer: D – Beta

**Bleaching powder loses its power on keeping for a long time because:**A) It changes into calcium hypochloriteB) It changes into calcium chloride and calcium hydroxideC) It absorbs moistureD) It changes into calcium chloride and calcium chlorate Show Answer Correct Answer: D – It changes into calcium chloride and calcium chlorate

**Light year is related to:**A) TimeB) DistanceC) EnergyD) Speed Show Answer Correct Answer: B – Distance

**When the quantity of charge on each of the two bodies is doubled, the force between them becomes:**A) One fourthB) One halfC) TwiceD) Four times Show Answer Correct Answer: D – Four times

**Light year is related to:**A) TimeB) DistanceC) EnergyD) Speed Show Answer Correct Answer: B – Distance

**The word ceramic means:**A) Hard materialB) Soft materialC) Dry materialD) Burnt material Show Answer Correct Answer: D – Burnt material

**Silver fish belongs to:**A) FishB) InsectC) ReptileD) Amphibian Show Answer Correct Answer: B – Insect