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. When does heart rest?
(a) Never
(b) While sleeping
(c) Between two beats
(d) While doing yoga
S1. Ans.(c)
Sol. Each ‘heartbeat’ consist of a contraction and relaxing of the heart muscles. When the heart contracts, it pumps blood through the blood vessels. When it relaxes, it draws blood in. It takes rest between relaxation and contraction.
Q2.In CGS method unit of force is ?
(a) Dyne.
(b) Newton.
(c) Pascal.
(d) Candela.
S2. (a)
Sol. In CGS the unit of force is Dyne. In SI method the unit of force is called Newton.
Q3. The mass of proton and mass of ________ is same.
(a) Neutron
(b) Electron
(c) Isoprone
(d) Alpha particle
S3. Ans.(a)
Sol.Protons and neutrons have almost the same mass, while the electron is approximately 2000 times lighter. Protons and electrons carry charges of equal magnitude, but opposite charge. Neutrons carry no charge (they are neutral).
Q4. Which drug is used for Pain Relief?
(a) Risedronate
(b) Tramadol
(c) Folic Acid
(d) Bupropion
S4. Ans.(b)
Sol.Tramadol (Ultram, Ultram ER, Conzip) is a drug used to treat moderate to moderately severe pain. It works similar to morphine.
Q6. Sugarcane is a type of _____.
(a) creeper
(b) tree
(c) shrub
(d) grass
S5. Ans.(d)
Sol.Sugarcane, (Saccharum officinarum), perennial grass of the family Poaceae, primarily cultivated for its juice from which sugar is processed. Most of the world’s sugarcane is grown in subtropical and tropical areas. The plant is also grown for biofuel production, especially in Brazil, as the canes.
Q6. _________ gets converted to phosgene, when exposed to sunlight.
(a) Chloroform
(b) Acetone
(c) Benzene
(d) Propylene
S6. 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.
Q7. Which of the following is not a symptom of a heart attack?
(a) Chest pain
(b) Nausea and sweating
(c) Numbness and aching of arms
(d) Pain in legs
S7. Ans.(d)
Sol. A heart attack-medically was known as a myocardial infarction. The symptoms of heart attack include; pain or discomfort in one or both arms, back, neck, jaws or stomach. Shortness of breath with or without chest discomfort other signs such as breaking out in a cold sweat, nausea of lightheadedness. As with men and women’s most common heart attack symptom is chest pain or discomfort.
Q8. The most abundant element on the earth is?
(a) calcium.
(b) Silicon.
(c) oxygen.
(d) Nitrogen.
S8. (C)
Sol. Oxygen is the most abundant element on the earth crust with 46.6%.
Q9. Which one of the following is radioactive element?
(a)Uranium.
(b) Thorium.
(c)Radium.
(d) cadmium.
S9. (d)
Sol. Elements having atomic number greater than 82 are radioactive element in nature.Atomic number of cadmium is 48 , so it is not radioactive.
Q10. _ is a by-product of sewage treatment and can be decomposed to produce bio-gas?
(a) sewage.
(b) sludge.
(c) sewer.
(d) scum.
S10. (b)
Sol. Sewage treatment involves three stages. Sludge is a semi-solid residue produced in first step during treatment of sewage and waste water.
Q11. Who discovered the colour photography?
(a) Robert Boyce.
(b) Enrico Fermi.
(c) John logie Baird.
(d) James clerk Maxwell.
S11. (d)
Sol. The colour photography was discovered by James clerk Maxwell in 1855. The first demonstration of colour photography by three colour method was suggested by him in 1855.
Q12. Hydroscope is an instrument that shows changes in?
(a) Sound under Water.
(b) Atmospheric humidity.
(c) Density of liquid.
(d) Elevation of land.
S12.(a)
Sol. Hydroscope- it is used for seeing below the surface of water.
Q13. Which of the following is an example of cantilever beam?
(a) Diving board.
(b) Bridge.
(c) see saw.
(d) common balance.
S13. (a)
Sol. Cantilever beam is anchored or hinged at one end. Diving board is an example of Cantilever beam.
Q14. Fe has 26 protons in its nucleus. What are the number of electrons in fe 2+ ion?
(a) 24.
(b) 26.
(c) 28.
(d) 13.
S14. (a)
Sol. 24. The separation of visible light into it’s different colors is known as dispersion.
Q15. First man to go into space was?
(a) Roald Amundsen.
(b) Reynalt Mayor.
(c) Robert Peary.
(d) Major yuri Gagarin.
S15. (d)
Sol. Yuri Gagarin was the first man to travel into space. He was the Russian Soviet pilot.
