MCQOPTIONS
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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 2951. |
Measurement of the rate ofconsumption in unit volume of water over a period of time is done to find out [MP PMT 1996] |
| A. | Biogas generation |
| B. | Biological oxygen demand |
| C. | Biosynthetic pathways |
| D. | Fermentation |
| Answer» C. Biosynthetic pathways | |
| 2952. |
Domestic waste contains [CBSE PMT 1991] |
| A. | Non-biodegradable pollutants |
| B. | Biodegradable pollutants |
| C. | Hydrocarbons |
| D. | None of the above |
| Answer» C. Hydrocarbons | |
| 2953. |
The pollution in city like Delhi may be controlled to great extent [CPMT 1991] |
| A. | By proper sewage and proper exit of chemicals from factories |
| B. | By wide roads and factories away from the city |
| C. | By cleaning city and scanty use of pesticides |
| D. | All of the above |
| Answer» E. | |
| 2954. |
Increase in the percentage of fauna and decrease in flora may be dangerous because it enhances [CPMT 1991] |
| A. | Percentage of |
| B. | Percentage of radioactive fall out |
| C. | Percentage of |
| D. | Persentage of diseases |
| Answer» B. Percentage of radioactive fall out | |
| 2955. |
Today the concentration of green house gases is very high because of [CPMT 1991] |
| A. | Use of refrigerator |
| B. | Increased combustion of oils and coal |
| C. | Deforestation |
| D. | All of the above |
| Answer» E. | |
| 2956. |
What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer [CPMT 1990; 1995; CPMT 1998] |
| A. | Sulphur dioxide |
| B. | Nitrogen oxide and fluorocarbons |
| C. | Carbon dioxide |
| D. | Carbon monoxide |
| Answer» C. Carbon dioxide | |
| 2957. |
The pollutants emitted by jet aeroplanes in outer atmosphere flourocarbons are known as [DPMT 1990; MP PMT 1998; Pb. PMT 1999; MHCET 2001] |
| A. | Smog |
| B. | Photochemical oxidants |
| C. | Aerosols |
| D. | Loess |
| Answer» D. Loess | |
| 2958. |
Ozone layer in upper atmosphere (stratosphere) is destroyed by or which one of the chemicals is responsible for the reduction of ozone content of atmosphere [MP PMT 1990, 2002, 04; BHU 1989, 90; CPMT 1993; KCET 2000; Pb. PMT 2000] |
| A. | Hydrochloric acid |
| B. | Photochemical smog |
| C. | Chlorofluoro carbon (CFC) |
| D. | Sulphur dioxide |
| Answer» D. Sulphur dioxide | |
| 2959. |
The excessive discharge of fertilizers into water bodies results in [MP PMT 1990] |
| A. | Growth of fish |
| B. | Death of hydrophytes |
| C. | Eutrophication |
| D. | Silt |
| Answer» D. Silt | |
| 2960. |
Generally speaking, the atmosphere in big cities is polluted most by [BHU 1990; AMU 1991] |
| A. | Radioactive fall out |
| B. | Household waste |
| C. | Automobile exhaust |
| D. | Pesticide residues |
| Answer» D. Pesticide residues | |
| 2961. |
Which of the following disease is caused or aggravated by pollution [MP PMT 1990] |
| A. | Bronchitis |
| B. | Rheumatism |
| C. | Scurvy |
| D. | Haemophilia |
| Answer» B. Rheumatism | |
| 2962. |
One of the most dangerous radioactive pollutant to Homo sapiens is [MP PMT 1990; CPMT 1990; CBSE PMT 1995] |
| A. | Strontium - 90 |
| B. | Phosphorus - 32 |
| C. | Sulphur - 35 |
| D. | None of the above |
| Answer» B. Phosphorus - 32 | |
| 2963. |
Polluted water can be purified by using [CBSE PMT 1990] |
| A. | Micro-organisms |
| B. | Algae |
| C. | Pesticides |
| D. | Fishes |
| Answer» B. Algae | |
| 2964. |
A pollutant is an agent which causes change in [CPMT 1989] |
| A. | Balance of nature |
| B. | Local flora |
| C. | Geochemical cycles |
| D. | Local fauna |
| Answer» D. Local fauna | |
| 2965. |
Green house effect is due to the presence of [CBSE PMT 1989, 91; CPMT 1998, 99; AIIMS 2000] |
| A. | Ozone layer in the atmosphere |
| B. | Infrared light reaching the earth |
| C. | Moisture layer in the atmosphere |
| D. | layer in the atmosphere |
| Answer» E. | |
| 2966. |
Effect of pollution is first and most marked on [CPMT 1988] |
| A. | Natural flora of a place |
| B. | Natural geochemical cycle |
| C. | Natural gaseous cycle |
| D. | Natural balance of our environment |
| Answer» B. Natural geochemical cycle | |
| 2967. |
Major pollution causing agent is [CPMT 1986] |
| A. | Man |
| B. | Animals |
| C. | Hydrocarbon gases |
| D. | None of the above |
| Answer» B. Animals | |
| 2968. |
Biological treatment of water pollution is done with the help of [CPMT 1986] |
| A. | Phytoplankton |
| B. | Lichens |
| C. | Fungi |
| D. | None of the above |
| Answer» B. Lichens | |
| 2969. |
Thermal pollution of water bodies is due to [DPMT 1986] |
| A. | Discharge of heat (hot water) from power plants |
| B. | Discharge of chemicals from industries |
| C. | Discharge of waste from mining |
| D. | Discharges of agricultural run off |
| Answer» B. Discharge of chemicals from industries | |
| 2970. |
Spraying of D.D.T. on crops produces pollution of [CPMT 1984, 90; MP PMT 1995, 98] |
| A. | Air only |
| B. | Air and soil only |
| C. | Air, soil and water |
| D. | Air and water only |
| Answer» D. Air and water only | |
| 2971. |
Indicator plants which can be used to indicate atmospheric pollution by SO2 are [NCERT 1983; CPMT 1989, 94] |
| A. | Lichens like Usnea |
| B. | Grassland like Deschampsia |
| C. | Moss like Sphagnum |
| D. | Climbers like Cucurbita |
| Answer» B. Grassland like Deschampsia | |
| 2972. |
BOD stands for [AIIMS 1984; Kerala PMT 2004] |
| A. | Biological organism death |
| B. | Biochemical organic matter decay |
| C. | Biotic oxidation demand |
| D. | Biochemical oxygen demand |
| Answer» E. | |
| 2973. |
Some effects of sulphur dioxide and its transformation products on plants include [JIPMER 1983; MP PMT 1998; BHU 1999, 2004] |
| A. | Chlorophyll destruction |
| B. | Plasmolysis |
| C. | Golgi body destruction |
| D. | None of the above |
| Answer» B. Plasmolysis | |
| 2974. |
DDT is a [BHU 1982; DPMT 1984; CBSE PMT 1999; MP PMT 2004; AIIMS 2005] |
| A. | Non-biodegradable pollutant |
| B. | Biodegradable pollutant |
| C. | Antibiotics |
| D. | None of the above |
| Answer» B. Biodegradable pollutant | |
| 2975. |
A pollutant is any substance chemical or other factor that changes |
| A. | Natural geochemical cycles |
| B. | Natural balance of our environment |
| C. | Natural flora of a place |
| D. | The natural wild life of a region |
| Answer» C. Natural flora of a place | |
| 2976. |
Carbon monoxide (CO) is harmful to man because [CPMT 1983] |
| A. | It forms carbolic acid |
| B. | It generates excess |
| C. | It is carcinogenic |
| D. | It competes withfor haemoglobin |
| Answer» E. | |
| 2977. |
One of the following is the chief source of water and soil pollution [NCERT 1983] |
| A. | Agro industry |
| B. | Mining |
| C. | Thermal power stations |
| D. | All of these |
| Answer» E. | |
| 2978. |
In a polluted lake, the index of pollution is [DPMT 1983] |
| A. | BOD and Daphnia |
| B. | DO and Artemisia |
| C. | Presence of frogs |
| D. | Diatoms larvae |
| Answer» B. DO and Artemisia | |
| 2979. |
Smog is a common pollutant in places having [DPMT 1982; CPMT 1996] |
| A. | High temperature |
| B. | Low temperature |
| C. | Excessivein the air |
| D. | Excessive ammonia in the air |
| Answer» C. Excessivein the air | |
| 2980. |
Which of the following is normally not an atmospheric pollutant [CPMT 1981, 84; DPMT 1982, 92; MP PMT 1984, 93; CBSE PMT 1988, 92] |
| A. | Carbon monoxide |
| B. | Carbon dioxide |
| C. | Sulphur dioxide |
| D. | Hydrocarbons |
| Answer» C. Sulphur dioxide | |
| 2981. |
Which of the following is a water polluting factor [CPMT 1980; MP PMT 1986, 2000; BHU 1991] |
| A. | Smoke |
| B. | Industrial waste |
| C. | Detergent |
| D. | Ammonia |
| Answer» C. Detergent | |
| 2982. |
Which is the mostpolluted city |
| A. | Madras |
| B. | Calcutta |
| C. | Delhi |
| D. | Bombay |
| Answer» C. Delhi | |
| 2983. |
The reason of pollution is |
| A. | Population explosion |
| B. | Urbanisation |
| C. | Industrialisation |
| D. | All the above |
| Answer» E. | |
| 2984. |
Problem associated with nuclear power plants is |
| A. | Thermal pollution |
| B. | Emission of hazardous radio-nuclides |
| C. | Disposal of radioactive waste |
| D. | All the above |
| Answer» C. Disposal of radioactive waste | |
| 2985. |
Which of the following intensity of sound becomes a pollutant |
| A. | 40 db |
| B. | 70 db |
| C. | 100 db |
| D. | 200 db |
| Answer» D. 200 db | |
| 2986. |
Leukaemia is caused by |
| A. | Ca-40 |
| B. | Sr-90 |
| C. | Caesium |
| D. | Iodine |
| Answer» C. Caesium | |
| 2987. |
3, 4-benzopyrene causes |
| A. | Leukaemia |
| B. | Cytosilicosis |
| C. | Lung cancer |
| D. | Tuberculosis |
| Answer» D. Tuberculosis | |
| 2988. |
What is EIA |
| A. | Ecology in America |
| B. | Ecological investment and accounts |
| C. | Ecological impact analysis |
| D. | Environmental impact assessment |
| Answer» E. | |
| 2989. |
Non-ionising radiations damaging to DNA are |
| A. | X-rays |
| B. | UV rays |
| C. | Gamma rays |
| D. | Beta rays |
| Answer» C. Gamma rays | |
| 2990. |
Brewery and sugar factory waste alters the quality of a water body by increasing |
| A. | Temperature |
| B. | Turbidity |
| C. | pH |
| D. | COD and BOD |
| Answer» E. | |
| 2991. |
Excessive inhalation of manganese causes |
| A. | Pneumonia |
| B. | Gout |
| C. | Anaemia |
| D. | Diptheria |
| Answer» B. Gout | |
| 2992. |
Which of the following causes outbreak of jaundice |
| A. | Air pollution |
| B. | Water pollution |
| C. | Thermal pollution |
| D. | Soil pollution |
| Answer» C. Thermal pollution | |
| 2993. |
By which method the quantity of organic pollutants in water can be determined |
| A. | By pH measurement |
| B. | By transparency measurement |
| C. | By measuring the change of colour |
| D. | By measuring BOD |
| Answer» E. | |
| 2994. |
Which of the following is a main factor of water pollution |
| A. | Commercial production |
| B. | Windmill |
| C. | Smoke and ammonia |
| D. | Detergents |
| Answer» E. | |
| 2995. |
Eutrophication is caused by |
| A. | Mine effluents |
| B. | Sewage and detergents |
| C. | Petrochemical and fertilizer plant effluents |
| D. | and present in acid rains |
| Answer» C. Petrochemical and fertilizer plant effluents | |
| 2996. |
Photochemical transformation of the automobile exhaust emission in UV wavelength of sunlight results into |
| A. | and |
| B. | and |
| C. | and PAN |
| D. | and |
| Answer» D. and | |
| 2997. |
The common refrigerant chlorofluoro-methane (freon) and \[N{{O}_{2}}\] is a serious pollutant because |
| A. | It lowers atmospheric temperature |
| B. | It prevents cloud condensation |
| C. | It destroys haemoglobin |
| D. | It disrupts layer |
| Answer» E. | |
| 2998. |
In metropolitan cities like Mumbai and Calcutta, the major atmospheric pollutants are |
| A. | Carbon monoxide and oxides of sulphur |
| B. | Hydrocarbons and hot air |
| C. | Pollens and marsh gas |
| D. | Ozone |
| Answer» B. Hydrocarbons and hot air | |
| 2999. |
Accumulation of fluoride in plant leaves causes |
| A. | Chlorosis |
| B. | Stem rot |
| C. | Tip burn |
| D. | None of the above |
| Answer» D. None of the above | |
| 3000. |
The major cause (80%) of air pollution in big cities is due to |
| A. | Transportation by automobiles |
| B. | Industrial activities |
| C. | Use of insecticides |
| D. | Radioactive fallouts |
| Answer» B. Industrial activities | |