| GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012: Questions on Science Oct 22nd 2012, 05:05 | GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012 | | The source for all engineering and legal education news in India | | | Questions on Science Oct 22nd 2012, 04:37 Q.1) The method of concentrating the ore which makes use of the difference in density between ore and impurities is called {i} liquation {ii} leaching {iii} levigation {iv} magnetic separation Answer: Leaching Q.2) The storage required for an image such as an X-ray is approximately {i} a few bytes {ii} a few hundred bytes {iii} a few gigabytes {iv} in the megabyte range. Answer: in the megabyte range. Q.3) A gigabyte represents {i} 1 billion bytes {ii} 1000 kilobytes {iii} 230 bytes {iv} 1024 bytes Answer: 1 billion bytes. Q.4) The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of {i} atomic structure {ii} metallurgy {iii} periodic table of contents {iv} discovery of elements Answer: periodic table of contents Q.5) The metal that is usually extracted from sea water is {i} Ca {ii} Na {iii} K {iv} Mg Answer: Na Q.6) The maximum number of covalent formed by nitrogen is {i} 1 {ii} 2 {iii} 3 {iv} 4 Answer: 3 Q.7) The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is {i} helium {ii} ozone {iii} oxygen {iv} methane Answer: Ozone. Q.8) The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called {i} granite {ii} basalt {iii} igneous rocks {iv} sedimentary rocks Answer: Igneous rocks Q.9) The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is {i} Dalton's law {ii} Gay Lussac's law {iii} Henry's law {iv} Raoult's law Answer: Henry's law Q.10) The metallurgical process in which a metal is obtained in a fused state is called {i} smelting {ii} roasting {iii} calcinations {iv} froth floatation Answer: Smelting Q.11) The metal used to recover copper from a solution of copper sulphate is {i} Na {ii} Ag {iii} Hg {iv} Fe Answer: Fe Q.12) The number of moles of solute present in 1 kg of a solvent is called its {i} molality {ii} molarity {iii} normality {iv} formality Answer: Molality Q.13) ______ are devoid of respiratory, excretory and circulatory organs. {i} Threadworms {ii} Sponges {iii} Tapeworms {iv} Liver fluke Answer: Sponges Q.14) Which one of the followings in birds indicates their reptilian ancestry? {i} Eggs with a calcareous shell {ii} Scales on their hind limbs {iii} Four-chambered heart {iv} Two special chambers crop and gizzard in their digestive tract Answer: Scales on their hind limbs Q.15) Animals having a built in thermostat to maintain constant body temperature are known as {i} Biothermic {ii} Poikilothermic {iii} Oligothermic {iv} Homeothermic Answer: Homeothermic Q.16) Water-Vascular' system is found in {i} Sea-anemone {ii} Sea-pen {iii} Sea-cucumber {iv} Sea-horse Answer: Sea cucmber. Q.17) Ordinary table salt is sodium chloride. What is baking soda? {i} Potassium chloride {ii} Potassium carbonate {iii} Potassium hydroxide {iv} Sodium bicarbonate Answer: Sodium Bicarbonate Q.18) A hybrid computer {i} Resembles digital computer {ii} Resembles analog computer {iii} Resembles both a digital and analog computer {iv} None of the above Answer: Resembles both a digital and analog computer Q.19) What Frank Whittle invented? {i} Radar {ii} Ethyl gasoline {iii} Sonar {iv} Jet propulsion Answer: Jet propulsion Q.20) The first surgical transplant of the human heart was performed by {i} William de Vries {ii} Christian Bernard {iii} Gerhard Hensen {iv} Joseph Lister Answer: Christian Bernard |  | | |  |  |
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