Are you preparing for the Odisha Sub-Ordinate Staff Selection Commission (OSSSC) Accountant or Data Entry Operator (DEO) exams? Mastering General Science is crucial for success in these competitive exams. To assist you in your preparation, we’ve compiled a list of the top 20 Science Multiple Choice Questions (MCQs) that commonly appear in these exams. Let’s dive in:
Top 20 General Science MCQS For OSSSC Accountant, DEO 27 March 2024
Q1. Genetic screening is
(a) analysis of DNA to check the presence of a particular gene in a person
(b) analysis of gene in a population
(c) pedigree analysis
(d) screening of infertility in parents
S1.Ans.(a)
Sol. Genetic screening is a process through which analysis of gene is performed to find out defective gene causing a specific disorder in a person.
Q2. Bronze is an alloy of
(a) Copper & Tin
(b) Copper & Zinc
(c) Copper & Iron
(d) Iron & Nickel
S2. Ans.(a)
Sol. Copper, bronze and tin metal is called as mixed metal. It is usually made of 88% copper and 12% tin. It is used in the manufacture of utensils, sculptures and coins.
Q3. Which of the following tests is done to diagnose AIDS?
(a) Amniocentesis
(b) ELISA
(c) Widal test
(d) Typhidot test
S3.Ans (b)
Sol. ELISA (Enzyme linked immunosorbent assay) test is used to detect HIV infection which is the cause of AIDS.
Q4. Hormones produced in one part of the organism reach the distantly located target via
(a) muscles
(b) bone
(c) cartilage
(d) blood
S4.Ans. (d)
Sol. Hormones are poured directly into the blood. Blood helps hormones to reach at their target place.
Q5.Kala-azar disease is caused by ______.
(a) bacteria
(b) protozoa
(c) fungi
(d) viruses
S5.Ans. (b)
Sol. Kala azar, (also known as visceral Leishmaniasis) is caused by protozoa parasite from over 20 Leishmania species. Kala-azar is a disease in which a parasite migrates to the internal organs such as the liver, spleen and bone marrow. Kala azar is also called black fever.
Q6.Which of the following is NOT manmade ecosystem?
(a) Orchards
(b) Home aquarium
(c) Botanical gardens
(d) Grassland
S6.Ans. (d)
Sol. Grassland is not a man made ecosystem. The man made ecosystem is an artificial ecosystem of plants, animals, and people living in an area together with their surroundings. Example–Gardens, Zoo, Orchards, Home aquarium etc.
Q7. The rate of change of momentum of a body equal of the resultant:
(a) energy
(b) power
(c) force
(d) impulse
S7.Ans.(c)
Sol. Newton’s 2nd Law – The rate of Change of momentum always acts in the direction of resultant force acting on a body ⇒ (F = ma) (where m = mass; a = aceeleration)
Q8. If an apple is released from an orbiting spaceship, it will
(a) fall towards the Earth
(b) move at a lower speed
(c) move along with the spaceship at the same speed
(d) move at a higher speed
S8.Ans.(c)
Sol. Due to the lack of gravitional force the apple so released will move by the same speed as the spaceship.
Q9. Which of the following is a vector quantity?
(a) Velocity
(b) Speed
(c) Temperature
(d) Hours
S9.Ans.(a)
Sol. A vector quantity is one which has both magnitude and direction. Velocity has both magnitude and direction so it is a vector quantity.
Q10. One Nanometer is equal to
(a) 10–9 m
(b) 10–6 m
(c) 10–10 m
(d) 10–3 m
S10.Ans.(a)
Sol. One nanometre is 1 × 10–9 m. It is also defined as equal to 10 Ao.
Q11. What is the scientific name of “Crow”?
(a) Corvus splendens
(b) Bison bonasus
(c) Equusasinus
(d) Equusferuscaballus
S11. Ans.(a)
Sol. Corvus splendens is the scientific name of crow.
Q12. Mold inhibitor used in bread is
(a)Sodium / Calcium propionate
(b) Sodium chloride
(c) Calcium carbonate
(d) None of these
S12. Ans.(a)
Sol.Sodium/Calcium propionateis used as Mold inhibitor in bread.
Sodium propionateis used as a food preservative.
It is used primarily as a mold inhibitor in bakery products.
Calcium propionate is also used as a preservative in a wide variety of products, including: bread, other baked goods, processed meat, whey, and other dairy products.
Q13. Prothrombin, responsible for clotting of blood is released by_____.
(a) Small Intestine
(b) Blood Platelets
(c) Large Intestine
(d) Heart
S13. Ans.(b)
Sol.Prothrombin is transformed into thrombin by a clotting factor known as factor X or prothrombinase; thrombin then acts to transform fibrinogen, also present in plasma, into fibrin, which, in combination with platelets from the blood, forms a clot (a process called coagulation).
Q14. Acacia arabica is the scientific name of
(a) Neem
(b) Teak
(c) Babhul
(d) Pomegranate
S14. Ans.(c)
Sol.Vachellianilotica (commonly known as gum arabic tree, babul, thorn mimosa, Egyptian acacia or thorny acacia) is a tree in the family Fabaceae.
Q15.____ was the first person who discovered cells.
(a) Ernest Rutherford
(b) Robert Hooke
(c) Alexander Fleming
(d) Francis Crick
S15.Ans. (b)
Sol. Cell is discovered by Robert Hooke in 1665 and gave the book ‘micrographia’. Cells are the smallest unit of life the foundation of body. Hooke actually saw the dead cell walls of plant cell (cork) as it appeared under microscope. The cell is the basic unit of structure and organization in organisms. All living organisms are composed of one or more cells.
Q16.All green plants and certain blue-green algae which can produce food by photosynthesis are called the ____.
(a) Consumers
(b) Producers
(c) Decomposers
(d) Bacteria
S16. Ans. (b)
Sol. All green plants and certain blue-green algae which can produce food by photosynthesis are called the Producers. Producers also known as autotrophs.
Q17. The commonly used coolant in refrigerators is
(a) Ammonia
(b) Nitrogen
(c) Freon
(d) Oxygen
S17. Ans.(c)
Sol. The commonly used coolant in refrigerators is freon. Chloroflurocarbon (CFC) contains freon which is the chief reason behind ozone depletion.
Q18. Who has a wavelength range of 700 nm to 400 nm?
(a) X-Rays
(b) Visible light
(c) Microwaves
(d) Radio waves
S18.Ans. (b)
Sol. Light is a type of electromagnetic radiation whose wavelength is within the visible range. Light basically form of photon. The wavelength range of visible light is between 400 nm – 700 nm.
Q19.Which among the following compounds has the strongest hydrogen bond?
(a) HI
(b) HCl
(c) HF
(d) HBr
S19. Ans.(c)
Sol. HF compounds has the strongest hydrogen bond.
Q20. Ozone hole is caused by chemicals like _____.
(a) Nitrogen Oxide
(b) Hydrogen Sulphide
(c) Chloro Fluoro Carbon
(d) Carbon Monoxide
S20. Ans.(c)
Sol. The chief ozone-depleting substances include chlorofluorocarbons (CFCs), carbon tetrachloride, hydro chlorofluorocarbons (HCFCs) and methyl chloroform.
