General Science MCQs and Answers For OPSC, OSSC, OSSSC, BANKING Exam| 2nd June2022

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.

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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. _________ gets converted to phosgene, when exposed to sunlight.

(a) Chloroform

(b) Acetone

(c) Benzene

(d) Propylene

 

Q12. Who discovered benzene?

(a) Hal Anger

(b) Michael Faraday

(c) Bruce Ames

(d) Nicolas Appert

 

 

Q13. Birds which swim in water have –

(a) Webbed feet

(b) Broad wings

(c) Long beaks

(d) Toes with claws

 

Q14.Which one of the following diseases is caused due to presence of excess arsenic in water?

(a) Alzheimer’s disease

(b) Parkinson’s disease

(c) Skin cancer

(d) Indigestion

 

 

Q15. Animals living in the tree trunks are known as –

(a) Arboreal

(b) Volant

(c) Amphibious

(d) Aquatics

ANSWER

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.(a)

Sol.Phosgene (COCl2) is a toxic gas/liquid used as a chemical warfare agent during WWI. Phosgene can form in chloroform as it is exposed to oxygen and amounts of UV light (although UV light is not always necessary if catalytic contaminants are present). Phosgene has a characteristic odor of cut hay.

 

S12. Ans.(b)

Sol. Benzene was first discovered by the English scientist Michael Faraday in 1825 in illuminating gas.

 

 

S13.Ans.(a)

Sol.The primary use for webbed feet is paddling through water,as the bird pulls its foot backwards through the water, the toes spread apart, causing the webs to spread out and help bird to swim.

 

S14.Ans.(c)

Sol.Skin cancer is caused due to presence of excess arsenic in water.

 

S15.Ans.(a)

Sol. Arboreal is defined as something having the evolutionary characteristics of animals which allow them to live or maneuver through trees. An example of an arboreal part of the chimpanzee’s anatomy is its long arms.