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. Baking powder contains
(a) NaCl
(b) Na -benzoate
(c) NaHCO3
(d) NaI
S1. Ans.(c)
Sol. Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid.
Most commercially available baking powders are made up of sodium bicarbonate (NaHCO3, also known as baking soda or bicarbonate of soda).
Q2. Deep frying of potato chips lead to generation of carcinogen
(a) Acrylamide
(b) Acefamide
(c) Formamide
(d) Antioxidan
S2. Ans.(a)
Sol. Deep frying of potato chips or any starch rich foodstuffs lead to the formation of carcinogen called Acryl amide.
Q3. Who discovered benzene?
(a) Hal Anger
(b) Michael Faraday
(c) Bruce Ames
(d) Nicolas Appert
S3. Ans.(b)
Sol. Benzene was first discovered by the English scientist Michael Faraday in 1825 in illuminating gas.
Q4. Which of the following gases emitted from automobile exhaust is poisonous?
(a) Carbon monoxide
(b) Carbon dioxide
(c) Hydrocarbons
(d) Sulphur dioxide
S4. Ans.(a)
Sol.CO is found in fumes produced any time you burn fuel in cars or trucks, small engines, stoves, lanterns, grills, fireplaces, gas ranges, or furnaces. CO can build up indoors and poison people and animals who breathe it. Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. It is toxic to hemoglobic animals when encountered in concentrations above about 35 ppm.
Q5. DNA, the full form of which is …………. Is a molecule that carries most of the genetic instructions used in growth of all living organisms.
(a) duonucleic acid
(b) deoxyribo nucleic acid
(c) detoxified nucleic acid
(d) dinucleic acid
S5. Ans.(b)
Sol.Deoxyribonucleic acid or DNA is a molecule that contains the instructions an organism needs to develop, live and reproduce.
Q6. Organic acids used in food preservation include
(a) Sulphuric acid
(b) Boric acid
(c) Hydrochloric acid
(d) Sorbic acid
S6. Ans.(d)
Sol. Sorbic acid, or 2,4-hexadienoic acid, is a natural organic compound used as a food preservative.
Other major organic acids used as food preservatives include:
Benzoic acid, Acetic acid, Propionic acids, Citric acid, Formic acid, Lactic acid.
Thus, Option (d) is correct.
Q7. Protein is essential to
(a) Maintain proper fluid regulation
(b) Add fiber to the diet
(c) Provide instant energy
(d) All of the above
S7. Ans.(a)
Sol. Protein is essential to maintain proper fluid regulation in body.
Protein is a nutrient needed by the human body for growth and maintenance.
Aside from water, proteins are the most abundant kind of molecules in the body.
Additionally, protein is needed to form blood cells.
Q8. Which showns the properties of an element in general?
(a) Atomic number
(b) Atomic weight
(c) Molecular weight
(d) Equivalent weight
S8. Ans.(a)
Sol. Each element has a specific set of chemical properties as a consequence of the number of electrons present in the neutral atom, which is the atomic number. The number of electrons in each element’s electron shells is the primary factor in determining its chemical bonding behaviour. Hence, it is the atomic number alone that determines the chemical properties of an element.
Q9. Surface tension in a liquid is due to:
(a) Electrical force between molecules
(b) Cohesive force between molecules
(c) Adhesive force between molecules
(d) Gravitational force between molecules
S9. Ans.(b)
Sol. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface do not have other like molecules on all sides of them and consequently they cohere more strongly to those directly associated with them on the surface. This forms a surface “film” which makes it more difficult to move an object through the surface than to move it when it is completely submersed.
Q10. Which one of the following is a rich source of Vitamin A?
(a) Potato tuber
(b) Carrot root
(c) Onion bulb
(d) Maize grains
S10. Ans.(b)
Sol. Carrots are an excellent source of vitamin A (in the form of carotenoids). In addition, they are a very good source of biotin, vitamin K, dietary fiber, molybdenum, potassium, vitamin B_6, and vitamin C.
Q11. BCG vaccine is given to protect from which of the following?
(a) Jaundice
(b) Anaemia
(c) Tuberculosis
(d) Polio
S11. Ans.(c)
Sol.
The BCG vaccine is the only TB vaccine currently available. The BCG Vaccine is normally given to children, and is not normally given to adults.
Q12. Parallel venation is found in _____ .
(a) plants which are monocots
(b) plants which have a dicot stem
(c) plants with leaves similar to Tulsi
(d) plants with tap roots
S12. Ans.(a)
Sol.
Parallel venation Veins run parallel to one another from the base to the tip of the leaf. This is a characteristic feature of monocot plants.
Q13. The hardest part of the body is ______.
(a) Bones
(b) Tooth Enamel
(c) Skull
(d) Spinal Cord
S13. Ans.(b)
Sol.
Tooth enamel is the hardest and most highly mineralized substance in the human body. It’s a tissue and not a bone.
Q14. The type of crop which is able to fix nitrogen from air is
(a) Wheat
(b) Legumes
(c) Coffee
(d) Rubber
S14. Ans.(b)
Sol. Nitrogen fixation is a chemical process by which molecular nitrogen (N2), with a strong triple covalent bond, in the air is converted into ammonia (NH3)
or related nitrogenous compounds, typically in soil or aquatic systems.
Lagumes are responsible for fixing of Nitrogen from air.
Q15. ‘Athlete’s Foot’ is a disease caused by
(a) Bacteria
(b) Fungus
(c) Protozoan
(d) Nematode
S15.Ans. (b)
Sol. Athlete’s Foot disease is caused by parasitic fungus of genus Trichophyton. Scaling, flaking and itching of affected areas are the symptoms of this disease. This disease transmitted in moist areas where people walk bare foot.
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