General Science and Ability 2014

**Optical fibre operates on the principle of:**A) Tyndall effectB) Photoelectric effectC) Laser technologyD) Total internal reflection Show Answer Correct Answer: D – Total internal reflection

**The sensation of the skin is perceived by:**A) EpidermisB) DermisC) EndodermisD) None of these Show Answer Correct Answer: B – Dermis

**The loudness of sound depends on its:**A) WavelengthB) FrequencyC) AmplitudeD) All of these Show Answer Correct Answer: C – Amplitude

**If carbon dioxide is passed through lime water for a long time, the cloudy white color (initially formed) disappears because of the:**A) Calcium bicarbonateB) Calcium hydroxideC) Calcium carbonateD) Calcium sulphate Show Answer Correct Answer: A – Calcium bicarbonate

**A person standing in front of a mirror finds his image smaller than him and erect. This implies that the mirror is:**A) PlaneB) ConcaveC) ConvexD) Not of good quality Show Answer Correct Answer: C – Convex

**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