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. Which of the following ocean currents does not belong to Indian Ocean?
(a) Agulhas Current
(b) Mozambique Current
(c) West Australian Ocean Current
(d) Benguela Current
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Q2. Calliper grade is the maturity measurement for (a) Apple
(b) Mango
(c) Banana
(d) Pineapple
Q3. Guava fruit is botanically known as
(a) Drupe
(b) Berry
(c) Sorosis
(d) Pome
Q4. Which of the following is biodegredable plastic?
(a) Poly propylene
(b) LDPE
(c) Polythene
(d) Polyhydroxy butyrate
Q5. What is the common characteristic of the elements of the same group in the periodic table?
(a) Electrons in outer most shell
(b) Total number of electrons
(c) Total number of protons
(d) Atomic weight
Q6.Which one of the following chemicals had been in use till now for making artificial clouds?
(a) Potassium Nitrate
(b) Heavy Water
(c) Sulphur Iodide
(d) Silver Iodide
Q7. Agar-agar is used as
(a)Stabilizer and thickener
(b) Antibiotic
(c)Colouring agent
(d) Nutrient supplement
Q8. ‘Super Rice’ was developed by
(a) M.S. Swaminathan (b) G.S. Khush
(c) N.E. Borlaug
(d) P.K. Gupta
Q9. In high temperature short time method of pasteurization, milk is heated at temperature
(a) 72°C for 15 seconds
(b) 62°C for 15 seconds
(c) 72° C for 30 minutes
(d) 62° C for 30 minutes
Q10. Which one of the following acids is used to detect vanaspati adulteration in pure ghee ?
(a) Concentrated sulphuric acid
(b) Dilute sulphuric acid
(c) Concentrated hydrochloric acid
(d) Dilute hydrochloric acid
Q11. Which among the following are not conjugated proteins ?
(a) Glycoproteins
(b) Scleroproteins
(c) Phosphoproteins
(d) Haemoglobins
Q12. 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
Q13. The reason of mirage is
(a) Interference of light
(b) Diffraction of light
(c) Polarization of light
(d) Total internal reflection of light
Q14. 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
Q15. Which among the following elements has highest Electronegativity?
(a) Gallium
(b) Sodium
(c) Arsenic
(d) Caesium
ANSWER
S1. Ans.(c)
Sol. Vegetables that do not require blanching before drying are onions, green peppers, and mushrooms.
S2. Ans.(c)
Sol.Calliper grade is the maturity measurement for Bananas.
S3. Ans.(b)
Sol.Botanically, the Guava fruit is a berry or capsule.
Guava is a common tropical fruit cultivated in many tropical and subtropical regions.
S4. Ans.(d)
Sol.Biodegradableplastics are plastics that can be decomposed by the action of living organisms, usually microbes, into water, carbon dioxide, and biomass.
Polyhydroxyalkanoates are a class of biodegradable plastic naturally produced by various micro-organisms.
Specific types of PHAs include poly-3-hydroxybutyrate (PHB), polyhydroxyvalerate (PHV) and polyhydroxyhexanoate (PHH).
S5.Ans.(a)
Sol. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements.
S6. Ans.(d)
Sol. Cloud seeding is the process of spreading either dry ice or more commonly silver Iodide into the upper part of clouds to try to stimulate the precipitation process and form rain.
S7. Ans.(a)
Sol.Agar or agar–agar, is a jelly-like substance consisting of polysaccharides.
It is used as Stabilizer and thickener, as the substitute of gelatin.
S8. Ans.(b)
Sol.In 1994, DrKhush developed a new type of “super rice”, which has the potential to increase yields by 25 percent.
DrKhush is one of the global leaders on crop breeding and a major brain behind the development of productive rice varieties and the Green Revolution in plant breeding.
S9. Ans.(a)
Sol. In high temperature short time method of pasteurization, milk is heated at temperature 72°C or 162°F for 15 seconds.
S10. Ans.(c)
Sol.Concentrated hydrochloric acid (HCl) is used to detect vanaspati adulteration in pure ghee.
To do this experiment, Heat a tablespoon of ghee in a test tube, and add an equal amount of concentrated HCl with a pinch of sugar.
Shake well to mix the ingredients.
The appearance of pink or red colour in the lower layer shows the sample is adulterated with rancid ghee like hydrogenated oils orvanaspati ghee.
S11. Ans.(b)
Sol. A conjugatedprotein is a protein that functions in interaction with other (non-polypeptide) chemical groups attached by covalent bonding or weak interactions.
Some examples of conjugated proteins are lipoproteins, glycoproteins, Nucleoproteins, phosphoproteins, hemoproteins (Hemoglobin and myoglobin are examples of ), metalloproteins, phytochromes, cytochromes, opsins, and chromoproteins.
S12. 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.
S13. 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.
S14.Ans.(b)
Sol. Silicon and germanium
S15.Ans.(c)
Sol. Arsenic has highest electronegativity in the given elements.
