Description : Thermal pollution is more common near a) Hot water springs b) Coal based power plants c) Tropical regions d) Temperate regions.
Last Answer : b) Coal based power plants
Description : What is the name given to the excessive growth of algae and other primary producers in streams and lakes as a result of an input of soil nutrients? The name begins with the letter "E".
Last Answer : ANSWER: EUTROPHICATION
Description : In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞
Last Answer : (D) ∞
Description : Water blooms are formed by a) Lemna b) Hydrilla c) Water hyacinth d) Planktonic algae.
Last Answer : d) Planktonic algae.
Description : What kind of plant is algae ?
Last Answer : Algae is an autotrophic plant.
Description : Sporocarp is a reproductive structure of (a) Some algae (b) Some aquatic ferns (c) Angiosperms having spores (d) Bryophytes
Last Answer : Ans. ((b))
Description : Golgi apparatus is absent in (a) Higher plants (b) Yeast (c) Bacteria and blue-green algae (d) Liver cells
Last Answer : Ans. ((c))
Description : The pioneers of succession on terrestrial habitats are a. Higher plants b. Lichens c. Mosses d. Algae
Last Answer : b. Lichens
Description : Green house effect is related to a) Increased growth of green algae b) Global warming c) Cultivation of vegetables in house
Last Answer : b) Global warming
Description : Which is the soil formed by wind dust in and around hot deserts? -General Knowledge
Last Answer : The answer is 'Loess soil'
Last Answer : answer:
Description : Which is the soil formed by wind dust in and around hot deserts?
Last Answer : Loess soil
Description : Many blue-green algae occur in thermal springs (hot-water springs). The temperature tolerance of these algae have been attributed to their (a) mitochondrial structure (b) importance of homopolar bonds in their proteins (c) cell wall structure (d) modern cell organization.
Last Answer : (c) cell wall structure
Description : Tanks of the Deccan area are a. Snow-fed b. Perennial c. Constructed near alluvial plains d. Used when streams become torrential
Last Answer : d. Used when streams become torrential
Description : what plants can live in saline soil?
Last Answer : Need Answer
Description : Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure ... & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure
Last Answer : (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure
Description : The factor influencing process of flowerings is: (a) Amount of chlorophyll (b) Soil water (c) Soil pH (d) Photoperiod
Last Answer : Ans. ((d))
Description : Minerals in soil body come from a. Weathering of rocks b. Wind and water c. Rains d. Dead organic remains
Last Answer : a. Weathering of rocks
Description : Spraying of DDT produces pollution of a) Air b) Air and Water c) Air and Soil d) Air, Water and Soil.
Last Answer : d) Air, Water and Soil.
Description : Pudding is done to a) Reduce percolation of water b) Pulverise and levelling soil c) Kill weeds D) All of the above
Last Answer : D) All of the above
Description : The process by which nutrient chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil a) Mulching b) Desertification c) Incineration d) Leaching
Last Answer : d) Leaching
Description : Water logging of soil makes it physiologically dry because- (a) This condition does not allow the capillary force to work b) this condition does not allow oxygen to enter the soil C) both (a) and (b) d) none of these
Last Answer : b) this condition does not allow oxygen to enter the soil
Description : Where are the hot deserts generally found? (1) On the eastern margins of the Tropics (2) On the western margins of the Tropics (3) Nearer the Equator (4) In the middle of the Continents
Last Answer : (2) On the western margins of the Tropics Explanation: The deserts lie in the belt of the trade winds which blow from northeast in the northern hemisphere and southeast in the southern hemisphere. ... west side of continents. Examples are the Thar Desert in Pakistan and the Atacama desert in Chile.
Description : Tundras are – (1) Deciduous forests (2) Tropical rain forests (3) Cold deserts (4) Hot deserts
Last Answer : (3) Cold deserts Explanation: In physical geography, tundra is a biome where the tree growth is hindered by low temperatures and short growing seasons. There are three types of tundra: Arctic ... swamps and bogs even in places that get precipitation typical of deserts of lower and middle latitudes.
Description : Why are the three hot regions of the world-equatorial forests, savannah lands and hot deserts-not found in Europe?
Last Answer : Ans: The three hot regions of the world-equatorial forests, savannah lands and hot deserts-are not found in Europe because Europe is the only inhabited continent situated entirely outside the tropics.
Description : Tundras are (1) Deciduous forests (2) Tropical rain forests (3) Cold deserts (4) Hot deserts
Last Answer : Cold deserts
Description : Where are the hot deserts generally found ? (1) On the eastern margins of the Tropics (2) On the western margins of the Tropics (3) Nearer the Equator (4) In the middle of the Continents
Last Answer : On the western margins of the Tropics
Description : Dust of Snow‘ here means- (a) Balls of snow (b) Pebbles (c) Flakes of snow (d) None of the above
Last Answer : (c) Flakes of snow
Description : In a cup, tea cools from 90°C to 80°C in exactly one minute. It will cool from 70°C to 60°C in (a) less than one minute (b) exactly one minute (c) nearly one minute (d) more than one minute
Last Answer : Ans:(d)
Description : Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is (A) 7 kgf/cm2 and 70 °C (B) 1000 kgf/cm2 and 100°C (C) 7 kgf/cm2 and 700°C (D) 1 kgf/cm2 (gage) and 70°C
Last Answer : (A) 7 kgf/cm2 and 70 °C
Description : The insulation resistance of a DC motor is observed to be 15 MΩ at a temp. of 70°C. what is its value corrected to 40°C. the correction factor for 70°C is 8.0.
Last Answer : Observed resistance at 70°C – 15 MΩ. Temperature correction factor – 8. Rm = kt * Rt kt – correction factor. Rm = 8 * 15 Rt – resistance measured at +°C. Rm = 120 MΩ. Rm – corrected value to 40°C The IR of DC motor corrected to 40°C is 120 MΩ.
Description : A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes. (A) 10 (B) > 10 (C) < 10 (D) Either (B) or (C), depends on the mass of the body
Last Answer : (B) > 10
Description : For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times. (A) 8 (B) 12 (C) 16 (D) 32
Last Answer : (C) 16
Description : or the selection of endospore-forming bacteria, a mixed culture can be heated at A- 80°C for 10 minutes B- 70°C for 10 minutes C- 60°C for 10 minutes D- 90°C for 10 minutes
Last Answer : 80°C for 10 minutes
Description : 40 optimum working temperature for diesel engine is about ∙ 88-90°c ∙ 71-82°c ∙ 60-70°c ∙ 90-100°c
Last Answer : ∙ 88-90°c
Description : ptimum working temperature for petrol engine is about ∙ 88-90°c ∙ 71-82°c ∙ 60-70°c ∙ 90-100°c
Last Answer : ∙ 71-82°c
Description : Soil salinity is measured by: (a) Potometer (b) Porometer (c) Conductivity meter (d) Calorimeter
Description : Insectivorous plants grow in: (a) Nitrogen rich soil (b) Nitrogen deficient soil (c) Potassium deficient soil (d) Carbohydrate rich soil
Description : Seed treatment is done to control— a) Soil-borne disease b) Air-borne disease c) Seed-borne disease d) None of these
Last Answer : c) Seed-borne disease
Description : A low branch with a node is bent down and covered with soil in a) Marcotting b) Layering c)Cutting d) Budding
Last Answer : b) Layering
Description : Mycorrhizae is associated with the following a) Formation of root nodules b) Hyphae penetrating the soil c) Found mostly in lower plants d) Soil erosion
Last Answer : a) Formation of root nodules
Description : Reclamation of saline soil which of the following practice is followed ? — a. Adequate drainage b. By good quality irrigation water c. Leaching of salts below root zone d. All of these
Last Answer : d. All of these
Description : Plants growing in saline soil are called
Last Answer : Plants growing in saline soil are called A. Xerophyte B. Hydrophyte C. Halophyte D. Heliophyte
Description : Identify the soil which ranges from red to brown in colour and saline in nature: (a) Red soil (b) Laterite soil (c) Arid soil (d) Alluvial soil
Last Answer : Identify the soil which ranges from red to brown in colour and saline in nature: (a) Red soil (b) Laterite soil (c) Arid soil (d) Alluvial soil
Description : Which of the plant species can be suggested on saline soil?
Last Answer : Ans. Haloxylon salicornium (II) Biochemistry
Description : The saline – alkali soil is also known as
Last Answer : Ans. Usar
Description : Saline soil is also called as
Last Answer : Ans. Solan chalk and White alkali
Description : Rice varieties suitable for Saline-alkaline soil are
Last Answer : Ans.CSR-10, CSR-13, CSR-27
Description : Rock phosphates are used in— (A) Saline soil (B) Sodic soil (C) Acidic soil (D) Neutral soil
Last Answer : (C) Acidic soil