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MCQOPTIONS
This section includes 2658 Mcqs, each offering curated multiple-choice questions to sharpen your UPSC IAS Exam knowledge and support exam preparation. Choose a topic below to get started.
| 851. |
The concept of sea floor spreading was first propounded by |
| A. | F.B. Taylor |
| B. | Harry Hess |
| C. | Lowthian Green |
| D. | A. Holmes |
| Answer» C. Lowthian Green | |
| 852. |
Which one of the following ocean tides is caused by biological factors? |
| A. | Neap tide |
| B. | Red tide |
| C. | Apogean tide |
| D. | Perigean tide |
| Answer» C. Apogean tide | |
| 853. |
Tsunamis are mainly produced by |
| A. | Subaerial earthquakes |
| B. | Submarine earthquakes |
| C. | Cyclones |
| D. | Tides |
| Answer» C. Cyclones | |
| 854. |
Which one of the following is different from others? |
| A. | Canary current |
| B. | Mozambique current |
| C. | Oyashio current |
| D. | Falkland current |
| Answer» C. Oyashio current | |
| 855. |
Which one of the following seas is the shallowest? |
| A. | Baltic |
| B. | Azov |
| C. | Yellow |
| D. | North |
| Answer» C. Yellow | |
| 856. |
Which of the following factors influence ocean currents? 1. Rotation of the Earth 2. Air pressure and wind 3. Ocean water density 4. Revolution of the Earth Select the correct answer using the codes given below |
| A. | 1 and 2 |
| B. | 1, 2 and 3 |
| C. | 1 and 4 |
| D. | 2, 3 and 4 |
| Answer» C. 1 and 4 | |
| 857. |
Consider the following countries 1. Denmark 2. Japan 3. Russian Federation 4. United Kingdom 5. United States of America Which of the above are the members of the 'Arctic Council'? |
| A. | ?1, 2 and 3??????? |
| B. | ?2, 3 and 4 |
| C. | ?1, 4 and 5?????? ? |
| D. | ?1, 3 and 5 |
| Answer» E. | |
| 858. |
Consider the following statements. 1. Exclusive economic zone extends to a distance of 200 nautical miles. 2. High seas can be used only by the concerned nation. Which of the above statements is/are correct? |
| A. | ?1 only????? |
| B. | ?2 only |
| C. | ?Both 1 and 2???? ??????????? |
| D. | ?Neither 1 nor 2 |
| Answer» B. ?2 only | |
| 859. |
Consider the following statements with regard to ocean deposits: 1. Organic deposits originate in the ocean itself. 2. Blue mud is the most widely spread of all the muds. 3. Calcareous deposits consist of remains of those animals which have high proportion of lime. Which of the above statements are correct? |
| A. | ?1 and 2 only???? |
| B. | ?2 and 3 only |
| C. | ?2 and 3 only???? |
| D. | ?1, 2 and 3 |
| Answer» E. | |
| 860. |
Which of the following is the correct sequence of deposits on the continental shelf from coast to deeper sea? |
| A. | ?Gravel, sand, sandy mud, mud |
| B. | ?Sand, gravel, sandy mud, mud |
| C. | ?Sandy mud, mud, sand, gravel |
| D. | ?Mud, sandy mud, gravel, sand |
| Answer» B. ?Sand, gravel, sandy mud, mud | |
| 861. |
Which of the following pairs are not correctly matched? 1. Blue Mud : Temgenous Deposits 2. Globigermic Ooze : Siliceous Deposits 3. Diatom Ooze : Calcareous Deposits 4. Red clay : Inorganic Deposits Code: |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 3 and 4 |
| D. | 1 and 2 |
| Answer» E. | |
| 862. |
Which of the following pairs are not correctly matched?????? ??????????????????????????????? 1. Blue Mud Temgenous Deposits?? 2. Globigermic Ooze Siliceous Deposits???? 3. Diatom Ooze Calcareous Deposits?? 4. Red clay Inorganic Deposits |
| A. | ?1 and 2 |
| B. | ?2 and 3 |
| C. | ?3 and 4 |
| D. | ?1 and 2 |
| Answer» E. | |
| 863. |
The largest coral reef in the world is found near the coast of which of the following countries |
| A. | Australia |
| B. | Cuba |
| C. | Ghana |
| D. | Philippines |
| Answer» B. Cuba | |
| 864. |
The largest coral reef in the world is found near ?the coast of which of the following countries???? |
| A. | ?Australia |
| B. | ?Cuba |
| C. | ?Ghana |
| D. | ?Philippines |
| Answer» B. ?Cuba | |
| 865. |
Which of the following pairs are correctly matched? Table I (Theory of origin of coral reefs) Table II (Propounders) 1. Subsidence Theory Darwin 2. Standstill Theory Dana 3. Glacial Theory Daly Code: |
| A. | 1 and 2 only |
| B. | 2 and 3 only |
| C. | 1 and 3 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 866. |
Which of the following pairs are correctly matched? Table I????????????? Table II (Theory of origin of coral reefs) (Propounders) 1. Subsidence Theory?? Darwin 2. Standstill Theory???? Dana 3. Glacial Theory?????? Daly |
| A. | ?1 and 2 only |
| B. | ?2 and 3 only |
| C. | ?1 and 3 only |
| D. | ?1, 2 and 3 |
| Answer» D. ?1, 2 and 3 | |
| 867. |
Which of the following have coral reefs? 1. Andaman and Nicobar Islands 2. Gulf of Kachch 3. Gulf of Mannar 4. Sunderban Select the correct answer using the codes given below |
| A. | ?1, 2 and 3 only?? |
| B. | ?2 and 4 only |
| C. | ?1,3 and 4 only?? ??????????? |
| D. | ?1, 2, 3 and 4 |
| Answer» B. ?2 and 4 only | |
| 868. |
Consider in following statements regarding continental slope. 1. It is an area of steep slope between continental shelf and deep sea plain 2. It is a part of the continental margin covered by the ocean water. 3. Continental slopes may have deep sea fan at its base. Which of the above statements is/are correct? |
| A. | ?1 only |
| B. | ?2 only |
| C. | ?3 only |
| D. | ?1, 2 and 3 |
| Answer» E. | |
| 869. |
Consider the following factors. 1. Temperature between \[{{18}^{o}}C\] and \[{{20}^{o}}C\] 2. Upwelling of cold water 3. Salinity above \[{{40}^{o}}\] %o 4. Turbidity 5. Fresh water 6. Submarine Plate forms Which of the above factors are not suitable for the growth of corals? |
| A. | 1, 2, 3 and 4 |
| B. | 3, 4, 5 and 6 |
| C. | 2, 3, 4 and 5 |
| D. | 1,3, 5 and 6 |
| Answer» D. 1,3, 5 and 6 | |
| 870. |
?????????????????????????????????????????????????? ??????????????????????????????? Consider the following factors. 1. Temperature between \[{{18}^{o}}C\] and \[{{20}^{o}}C\] 2. Upwelling of cold water 3. Salinity above \[{{40}^{o}}\] %o 4. Turbidity 5. Fresh water 6. Submarine Plate forms Which of the above factors are not suitable for the growth of corals? |
| A. | ?1, 2, 3 and 4???? ??????????? |
| B. | ?3, 4, 5 and 6 |
| C. | ?2, 3, 4 and 5?? |
| D. | ?1, 3, 5 and 6 |
| Answer» D. ?1, 3, 5 and 6 | |
| 871. |
Which of the following countries suffered maximum loss of life by the tsunami in the Indian Ocean on 26th December 2004. |
| A. | ?India?????????? ???????????????? |
| B. | ?Sri Lanka |
| C. | ?Indonesia????? |
| D. | ?Thailand |
| Answer» D. ?Thailand | |
| 872. |
Consider the following statements 1. Pacific is the most vulnerable ocean with respect to tsunamis. 2. India has developed a perfect tsunami warning system in the Indian Ocean. Which of the above statements is/are correct? |
| A. | ?1 only?????????? ?????????????? |
| B. | ?2 only |
| C. | ?Both 1 and 2??? |
| D. | ?Neither 1 nor 2 |
| Answer» D. ?Neither 1 nor 2 | |
| 873. |
Consider the following statements: 1. Tsunamis have very short wave length and high amplitude in the deep sea. 2. As the tsunamis reach the coast, their wave length increases and amplitude decreases. Which of the above statements is/are correct? |
| A. | ?1 only ???????????????????????? |
| B. | ?2 only |
| C. | ?Both 1 and 2???? ??????????? |
| D. | ?Neither 1 nor 2 |
| Answer» E. | |
| 874. |
Which of the following is not the major cause of tsunamis in the ocean? |
| A. | ?Earthquakes???? |
| B. | ?Volcanoes |
| C. | ?Landslides?????? ? |
| D. | ?Cyclones |
| Answer» E. | |
| 875. |
Consider the following oceans 1. Pacific Ocean 2. Atlantic Ocean 3. Indian Ocean Which of the following is the correct descending order with respect to the percentage of area covered by continental shelves to the total area in individual oceans? |
| A. | ?1, 2, 3 |
| B. | ?2, 1, 3 |
| C. | ?1, 3, 2 |
| D. | 3, 2, 1 |
| Answer» C. ?1, 3, 2 | |
| 876. |
Consider the following statements: 1. Moon is more effective than the sun for generating tides on the earth. 2. Spring tides are produced by the combined gravitational pull of moon and sun when moon, sun and earth are in the same line. 3. Each day a tide is experienced at the same time Which of the above statements is/are correct? |
| A. | ?1 only?????????? ?????????????? |
| B. | ?1 and 2 only |
| C. | ?2 and 3 only???? |
| D. | ?1,2 and 3 |
| Answer» C. ?2 and 3 only???? | |
| 877. |
Which is the correct sequence in descending order of tidal range in the Pacific Ocean? |
| A. | ?Cape Horn, Yokohama, Honolulu, That |
| B. | ?Yokohama, Honolulu, That, Cape Horn |
| C. | ?Honolulu, That, Cope Horn, Yokohama |
| D. | ?That, Cape Horn, Yokohama, Honolulu |
| Answer» B. ?Yokohama, Honolulu, That, Cape Horn | |
| 878. |
Match List I with List II and find out the correct answer by using the codes given below List I (Theory of Tidal Oragins) List II (Scholar) A. Equilibrium Theory 1. Laplace B. Dynamic Theory 2. William Whewell C. Progressive wave 3. Newton Theory D. Stationary wave 4. R.A. Harris Theory |
| A. | A-1 B-3 C-2 D-4 |
| B. | A-3 B-1 C-2 D-4 |
| C. | A-2 B-4 C-3 D-1 |
| D. | A-4 B-2 C-1 D-3 |
| Answer» C. A-2 B-4 C-3 D-1 | |
| 879. |
Match List I with List II and find out the correct answer by using the codes given below List I????????????????????? List II (Theory of Tidal Oragins) (Scholar)??? A. Equilibrium Theory?? 1. Laplace??? B. Dynamic Theory??????? 2. William Whewell?? C. Progressive wave 3. Newton Theory??? D. Stationary wave 4. R.A. Harris Theory ? |
| A. | ?A-1 ???? B-3?????? C-2?????? D-4 |
| B. | ?A-3????? B-1?????? C-2?????? D-4 |
| C. | A-2?????? B-4?????? C-3?????? D-1 |
| D. | A-4?????? B-2?????? C-1?????? D-3 |
| Answer» C. A-2?????? B-4?????? C-3?????? D-1 | |
| 880. |
The duirnal tides occur in 1. Gulf of Tonkins and Thailand 2. Java Sea 3. Bismark and Solomon Sea N and E island' of New Guinea 4. Along much of the Pacific coast |
| A. | ?Only 1 is incorrect |
| B. | ?1 and 2 are incorrect |
| C. | ?3 and 4 are incorrect |
| D. | ?Only 4 is incorrect |
| Answer» E. | |
| 881. |
Consider the following statements 1. Saragossa Sea is a 'gyre' of calm and motionless sea. 2. Saragossa Sea is surrounded by warm currents on all sides. 3. Saragossa Sea has higher salinity than the neighboring sea. 4. Saragossa Sea is not fit for navigation. Which of the above statements are correct? |
| A. | ?1, 2 and 3 only?? ?????????? |
| B. | ?2, 3 and 4 only |
| C. | ?1, 2 and 4 only?? ?????????? |
| D. | ?1, 3 and 4 only |
| Answer» E. | |
| 882. |
Imager Current is a branch of |
| A. | ?Canaries current |
| B. | ?Labrador current |
| C. | ?North Atlantic current |
| D. | ?Beguele current |
| Answer» D. ?Beguele current | |
| 883. |
Consider the following statements 1. Ocean currents have great effect on the temperature of the ocean water. 2. Ocean currents are deeply influenced by local winds. 3. Labrador Current sinks down the below the Gulf Stream and flows as a sub-surface current. 4. Ocean currents are not affected by Carioles force. Which of the above statements are correct? |
| A. | ?1 and 2 only???? |
| B. | ?1 and 3 only |
| C. | ?3 and 4 only???? |
| D. | ?2 and 4 only |
| Answer» C. ?3 and 4 only???? | |
| 884. |
Consider the following statements regarding continental shelves: 1. They can extend up to a depth of 100 fathoms. 2. They extend between coast and continental slope. 3. They cover more than 10 per cent of the sea surface area. 4. Maximum width of the continental shelf is found in the Atlantic Ocean. Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 2 and 3 only |
| C. | 1,2 and 3 only |
| D. | 1, 2, 3 and 4 |
| Answer» B. 2 and 3 only | |
| 885. |
Match List I with List II and find out the correct answer by using the codes given below: (Current) (Origin) A. Labrador current 1. Baffin Bay B. North-East Monsoon Drift 2. Strait of Malacca C. Kurile current 3. Okhotsk Sea D. North Atlantic Equatorial Current 4. West coast of Africa |
| A. | A-3 B-4 C-1 D-2 |
| B. | A-2 B-1 C-4 D-3 |
| C. | A-1 B-2 C-3 D-4 |
| D. | A-4 B-3 C-2 D-1 |
| Answer» D. A-4 B-3 C-2 D-1 | |
| 886. |
Match List I with List II and find out the correct answer by using the codes given below: (Current)?????????? (Origin) A. Labrador current 1. Baffin Bay B. North-East Monsoon Drift????? 2. Strait of Malacca C. Kurile current?? 3. Okhotsk Sea D. North Atlantic Equatorial Current?? 4. West coast of Africa |
| A. | A-3 ????? B-4?????? C-1?????? D-2 |
| B. | A-2?????? B-1?????? C-4?????? D-3 |
| C. | A-1?????? B-2?????? C-3?????? D-4 |
| D. | A-4?????? B-3?????? C-2?????? D-1 |
| Answer» D. A-4?????? B-3?????? C-2?????? D-1 | |
| 887. |
The important fishing grounds of the world are found in the regions where |
| A. | ?Warm and cold atmospheric currents meet. |
| B. | ?Rivers drain out large amounts of fresh water into the sea. |
| C. | ?Warm and cold oceanic currents meet. |
| D. | ?Continental shelf is undulating. |
| Answer» D. ?Continental shelf is undulating. | |
| 888. |
Match List I with List II and find out the correct answer using the codes given below: List I (Current) List II (Location) A. Benguela Current 1. East coast of South America B. Falkland current 2. West coast of Africa C. Kuroshio current 3. East court of Japan D. Gulf Stream 4. East coast of U.S.A. |
| A. | A-1 B-2 C-4 D-3 |
| B. | A-2 B-1 C-3 D-4 |
| C. | A-4 B-3 C-2 D-1 |
| D. | A-3 B-4 C-1 D-2 |
| Answer» C. A-4 B-3 C-2 D-1 | |
| 889. |
Which one of the following factors is responsible for change in the regular direction of ocean currents in the North Indian Ocean? |
| A. | ?Indian Ocean is 'half an ocean'. |
| B. | ?Indian Ocean has monsoon drift. |
| C. | ?Indian Ocean has greater variation in salinity. |
| D. | ?Indian Ocean is a land- locked ocean. |
| Answer» C. ?Indian Ocean has greater variation in salinity. | |
| 890. |
Consider the following statements. 1. In the Pacific Ocean there is a seasonal march of the Pacific Equatorial currents to the north of equator in summer and to the south of equator in the winter. 2. Axis of the counter equatorial current remains at the equator throughout the year. Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» B. 2 only | |
| 891. |
Consider the following statements. y 2. Axis of the counter equatorial current remains at the equator throughout the year. Which of the above statements is/are correct? |
| A. | ?1 only??????? |
| B. | ?2 only |
| C. | ?Both 1 and 2???? ??????????? |
| D. | ?Neither 1 nor 2 |
| Answer» B. ?2 only | |
| 892. |
Which of the following currents is also known as the Humboldt Current? |
| A. | ?California Current ???????? |
| B. | ?Labrador Current |
| C. | ?Peru Current???? |
| D. | ?Kuroshio Current |
| Answer» D. ?Kuroshio Current | |
| 893. |
Consider the following statements: 1. Ocean currents are the slow-surface movements of water in the ocean. 2. Ocean currents assist in maintaining the Earth's heat balance. 3. Ocean currents are set in motion primarily by prevailing winds. 4. Ocean currents are affected by the configuration of the ocean. Which of these statements are correct? |
| A. | ?1 and 2 only???? |
| B. | ?2, 3 and 4 only |
| C. | ?1, 3 and 4 only?? ?????????? |
| D. | ?1, 2, 3 and 4 |
| Answer» C. ?1, 3 and 4 only?? ?????????? | |
| 894. |
Which of the following factors of ocean current formation is specific to the North Indian Ocean? |
| A. | ?Salinity difference ???????? |
| B. | ?Shape of coasts |
| C. | ?Evaporation???? |
| D. | ?Change of seasons |
| Answer» E. | |
| 895. |
Match list I with list II and find out the correct answer using the code given below:????????? List I???????????????? List II????????????? A. Wave crest????? 1. Lowest part of the wave B. Wave trough??? 2. Highest part of the wave C. Wave length???? 3. Distance between a trough and its neighboring crust D. Wave height???? 4. Distance between two consecutive crests? or? troughs |
| A. | A-1 ?????????????? B-4????? C-2?????? D-3 |
| B. | A-2??????????????? B-1????? C-4?????? D-3 |
| C. | A-4??????????????? B-2????? C-3?????? D-1 |
| D. | A-3??????????????? B-1????? C-4?????? D-2 |
| Answer» C. A-4??????????????? B-2????? C-3?????? D-1 | |
| 896. |
Match list I with list II and find out the correct answer using the code given below: List I List II A. Wave crest 1. Lowest part of the wave B. Wave trough 2. Highest part of the wave C. Wave length 3. Distance between a trough and its neighboring crust D. Wave height 4. Distance between two consecutive crests or troughs |
| A. | A-1 B-4 C-2 D-3 |
| B. | A-2 B-1 C-4 D-3 |
| C. | A-4 B-2 C-3 D-1 |
| D. | A-3 B-1 C-4 D-2 |
| Answer» C. A-4 B-2 C-3 D-1 | |
| 897. |
Consider the following 1. The annual range of temperature is greater in the Pacific Ocean than that in the Atlantic Ocean. 2. The annual range of temperature is greater in the Northern Hemisphere than that in the Southern Hemisphere. Correct statements |
| A. | ?1 only?????????? ?????????????? |
| B. | ?2 only |
| C. | ?Both 1 and 2???? ??????????? |
| D. | ?Neither 1 nor 2 |
| Answer» C. ?Both 1 and 2???? ??????????? | |
| 898. |
Consider the following statements: 1. Saline water freezes slowly as compared to fresh water. 2. There is a positive correlation between salinity and density of sea water. 3. Boiling point of water decreases with increase in salinity 4. Salinity of sea water is inversely proportional to evaporation. Which of the above statements are correct? |
| A. | ?1 and 2?? |
| B. | ?2 and 3 |
| C. | ?3 and 4???????? ?? ??????????? |
| D. | ?1 and 4 |
| Answer» B. ?2 and 3 | |
| 899. |
Consider the following statements: 1. The temperature of the ocean water falls with increasing depth but at no depth point, the temperature falls below freezing point. 2. The temperature of the ocean water is almost the same at the sea surface in the Indian Ocean and Red Sea, but at greater depth temperature in Indian Ocean falls more rapidly than in Red Sea. Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» D. Neither 1 nor 2 | |
| 900. |
??????? Consider the following statements: 1. The temperature of the ocean water falls with increasing depth but at no depth point, the temperature falls below freezing point. 2. The temperature of the ocean water is almost the same at the sea surface in the Indian Ocean and Red Sea, but at greater depth temperature in Indian Ocean falls more rapidly than in Red Sea. Which of the above statements is/are correct? |
| A. | ?1 only?????????? ?????????????? |
| B. | ?2 only |
| C. | ?Both 1 and 2???? |
| D. | ?Neither 1 nor 2 |
| Answer» D. ?Neither 1 nor 2 | |