General Science MCQs and Answers: General Science are very important for OPSC, OSSC, OSSSC & Other State Exams. Aspirants who are willing to apply for the various Government exams in 2022 must go through the topics of General Science for competitive exams, as General Science is a key part of the syllabus.
General Science MCQs
Q1. Optical fibre works on which of the following principle of light?
(a) Reflection
(b) Refraction
(c) Diffraction
(d) Total internal reflection
Q2. Why does water tank appear shallower when viewed from the top?
(a) Due to reflection
(b) Due to refraction
(c) Due to diffraction
(d) Due to total internal reflection
Q3. Which colouris formed when Red and Green are mixed?
(a) Light blue
(b) Yellow
(c) White
(d) Grey
Q4. The phenomena of raising the outer edge of the curved roads, above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called _____.
(a) Banking of roads
(b) Cornering of roads
(c) Elevation of roads
(d) Tempering of roads
Q5. Convex mirror is generally used in _____.
(a) Solar cookers
(b) Opthalmoscope
(c) Reflector for head light
(d) Rear view mirror
Q6. It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?
(a) Law of inertia
(b) Newton’s second law
(c) Newton’s third law
(d) Pascal’s law
Q7. What was invented by Zacharias Jansen?
(a) Jet Engine
(b) Radium
(c) Microscope
(d) Electric Lamp
Q8. Who invented world’s first true radar and demonstrated its use?
(a) Fred Morrison
(b) A. H. Taylor and Leo C. Young
(c) Van Tassel
(d) W. K. Roentgen
Q9. Who invented the thermos flask?
(a) Ray Tomlinson
(b) Tim Berners-Lee
(c) William Cullen
(d) James Dewar
Q10. The laws which govern the motion of planets are called ___________________.
(a) Newton’s Laws
(b) Kepler’s Laws
(c) Avogadro’s Laws
(d) De Morgan’s Laws
Q11. What was the fissionable material used in the bombs dropped at Nagasaki (Japan) in the year 1945?
(a) Sodium
(b) Potassium
(c) Plutonium
(d) Iron
Q12. The reason of mirage is
(a) Interference of light
(b) Diffraction of light
(c) Polarization of light
(d) Total internal reflection of light
Q13. The two elements that are frequently used for making transistors are
(a)Boron and aluminium
(b)Silicon and germanium
(c)Iridium and tungsten
(d)Niobium and columbium
Q14. Which among the following elements has highest Electronegativity?
(a) Gallium
(b) Sodium
(c) Arsenic
(d) Caesium
Q15. Ergotism is due to consumption of:
(a) Contaminated grains
(b) Rotting vegetables
(c) Contaminated water
(d) Safe cooked food
Solutions
S1. Ans.(d)
Sol. Optical fibre work on the principle of Total Internal Reflection of Light. In optical fibre, when light traveling in an optically dense medium hits a boundary at a steep angle (larger than the critical angle for the boundary), the light is completely reflected. This is called total internal reflection.
S2. Ans.(b)
Sol. Water Tank appear shallower when viewed from the top due to refraction of light. This virtual depth is known as Apparent depth.
S3. Ans.(b)
Sol. Yellow colouris formed when Red and Green are mixed.
S4. Ans.(a)
Sol. The phenomenon of raising outer edge of the curved road above the inner edge is to provide necessary centripetal force to the vehicles to take a safer turn and the curved road is called Banking of Roads.
S5. Ans.(d)
Sol. A convex mirror provides for a larger field of view than a plane mirror. They are used whenever a mirror with a large field of view is needed. For example, the passenger-side rear view mirror on a car is convex.
S6. Ans.(c)
Sol. It is difficult to fix a nail on a freely suspended wooden frame because when the wooden frame is not resting against a support, the frame and nails both move forward on being hit with a hammer. However, when the frame is held firmly against a support, and the nail is hit, an equal reaction of the support drives the nail into the frame. Thus based on Newton’s Third Law of Motion.
S7. Ans.(c)
Sol. Zacharias Janssen was a Dutch spectacle-maker from Middelburg associated with the invention of the first Optical telescope. He is also credited for inventing the first truly compound microscope.
S8. Ans.(b)
Sol. A H Taylor and Leo C Young are inventor of first true radar.
S9. Ans.(d)
Sol. James Dewar was inventor of the thermos flask.
S10. Ans.(b)
Sol. The laws which govern the motion of planets are called Kepler’s law of planetary motion.
S11. Ans.(c)
Sol. ‘Fat Man’ was the code name for the type of bomb which was dropped on the Japanese city of Nagasaki by the United States of America. Plutonium was used as fissionable material in this bomb.
S12. Ans.(d)
Sol. The mirage is caused by the total internal reflection of light at layers of air of different densities. In Desert areas, the successive upper layer is denser than those below there. A ray of light coming from a distant object, like the top a tree gets refracted from a denser to a rare medium. Consequently, the refracted ray bends away from the normal until at a particular layer, the light is incident ray suffers total internal reflection and enters the eyes of the observer. It appears as if an inverted image of the tree.
S13.Ans.(b)
Sol. Silicon and germanium
S14.Ans.(c)
Sol. Arsenic has highest electronegativity in the given elements.
S15. Ans.(a)
Sol. Ergotism is a disease caused by consumption of contaminated grains. It is the effect of long-term ergot poisoning, traditionally due to the ingestion of the alkaloids produced by the Clavicepspurpurea fungus that infects rye and other cereals.
History MCQs and Answers For OPSC, OSSC, OSSSC, BANKING Exam
Odia MCQs And Answers For OPSC, OSSC, OSSSC, Banking Exam
Odisha Geography MCQs And Answers For OPSC, OSSC, OSSSC Exam
Odisha History MCQs And Answers For OPSC, OSSC, OSSSC Exam
Reasoning MCQs And Answers For OPSC, OSSC, OSSSC, BANKING Exam
English MCQs And Answers For OPSC, OSSC, OSSSC, BANKING Exam
