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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Producer gas differs from biogas in havingA. MethaneB. Carbon manoxideC. `CO_(2)`D. Formed by Fementation |
| Answer» Correct Answer - B | |
| 102. |
Give examples of Petro-plants. |
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Answer» ssil fuel (petrol and diesel). These plants belong to plant families such as Apocynaceae, Asclepiadaceae, Euphorbiaceae, Sapotaceae, Urticaceae, Compositae etc. Some plants are as follows:
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| 103. |
A petroleum plant isA. EichhorinaB. BrickelliaC. CausuarinaD. Madhuca |
| Answer» Correct Answer - B | |
| 104. |
Why the efficacy of Biogas is less than Natural gas. |
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Answer» The capacity of Biogas is a little less than natural gas because of 31% of carbon dioxide gas present in Biogas. If the percentage of CO2 is reduced then the calorific value of this gas can be increased. |
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| 105. |
Fuel wood required per person per day isA. 3kgB. 30kgC. 10kgD. 1 kg |
| Answer» Correct Answer - A | |
| 106. |
In Brazil, 90% of cars are running onA. Pure alcoholB. Pure gasolineC. Mixture of alcohol and gasolineD. Diesel |
| Answer» Correct Answer - C | |
| 107. |
Recently government of India has allowed mixidgn of alcohol in petrol.What is amoutn of alcohol permitted for mixing in petrolA. 0.25B. 10-15%C. 0.1D. 0.05 |
| Answer» Correct Answer - D | |
| 108. |
An example of fossil fuel is? (a) Alcohol (b) Gobar Gas (c) Petrol (d) Hydrogen |
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Answer» The answer is (c) Petrol |
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| 109. |
What is Biomass? |
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Answer» The chief source of bioenergy is sunlight. Out of total solar energy reaching earth, only 0.2% is stored in plants in the form of biomass. All the materials formed by photosynthesis form the bio-mass. As all living organism depend for their needs one plant and derive energy directly or indirectly from plants, hence all living organisms and their by-products can be included as biomass. |
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| 110. |
Alcohol for running automobiles isA. Ethyl alcoholB. Methyl alcoholC. Both A and BD. Butyl alcohol |
| Answer» Correct Answer - C | |
| 111. |
Gasohol isA. 90% alcohol + 10% petrolB. 10% alcohol + 90% petrolC. 20% alcohol + 80% petrolD. 100% ethanol |
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Answer» Correct Answer - B Gasohol programme of U.S.A. uses mixture of alcohol (10 - 15%) and petrol (85-90%) |
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| 112. |
Petrol crops are plantsA. Grown near oil fieldsB. Used in refining crude oilC. Whose fossil remains formed crude oilD. From which petrol like fuels can be derived |
| Answer» Correct Answer - D | |
| 113. |
Write the benefits of alcohol as fuel. |
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Answer» Ethanol can be used in auto vehicles. It can be used in pure form or mixed with petrol at 5% or 10% or 25% or 50%. Use of ethanol increases engine energy value and minimises pollution. |
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| 114. |
Gasohol containsA. `50-60% alcohol`B. `10-15% alcohol`C. `30-40% alcohol`D. Tapioca |
| Answer» Correct Answer - B | |
| 115. |
Which is not an energy cropA. TapiocaB. SugarcaneC. CalotripisD. Sugar Beet. |
| Answer» Correct Answer - C | |
| 116. |
The pioneer country in the production of fuel-alcohol isA. Saudi ArabiaB. JapanC. BrazilD. Iran Iraq |
| Answer» Correct Answer - C | |
| 117. |
The country pioneer inn production of fuel alcohol isA. Saudi ArabiaB. JapanC. BarazilD. Iran Iraq |
| Answer» Correct Answer - C | |
| 118. |
Maximum alchol production per hectare of crop is fromA. PatatoB. SugarcaneC. SugarbeetD. Tapioca |
| Answer» Correct Answer - B | |
| 119. |
A nitrogen fixing bacterium that forms a loose assocation with the roots of crop plants is Or Which one of the following micro-organisms is used as a bio fertilizerA. AzotobacterB. Bacillus polymyxaC. ClostridiumD. Azospirillum |
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Answer» Correct Answer - D A bacterium Azospirillum lipoferum forms loose association with roots of maize and some Brazilian grasses which increase the crop yield upto a large extent. |
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| 120. |
Pyrethrin is a common ingredient ofA. Mosquito coilsB. Fly spraysC. Mosquito matsD. All of above |
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Answer» Correct Answer - D Pyrethrin are obtained from the dry inflorescence of Chrysanthemum cinerariifolium. Pyrethrin is also used for sprays, mosquito coils mats and aerosols. |
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| 121. |
Assertion:Charcoal has equal heating power than wood. Reason:Charcoal burns without producing flame or smoke.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If the assertion and reason both are false. |
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Answer» Correct Answer - D Charcoal has twice heating power than wood. The wood is heated and changed to charcoal. Charcoal burns without producing flame or smoke. It is used in medicine, iron and steel industry and for absorbing impurities of air and water. |
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| 122. |
Biofertilizers includeA. Cowdung manure and farmyard wasteB. A quick growing crop ploughed backC. BGA/Anabaena and AzollaD. All the above |
| Answer» Correct Answer - C | |
| 123. |
The bacterium Bacillus thuringiensis is widely used in contemporary biology as Or Thurioside isA. Indicator of water pollutionB. InsecticideC. Agent for production of diary productsD. Source of industrial enzyme |
| Answer» Correct Answer - B | |
| 124. |
Biofuels areA. RenewableB. OrthodoxC. Pollution producingD. Organic wastes |
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Answer» Correct Answer - A Biofuels are biological origin, which is a major source of energy. They are renewable and used properly and efficiently. |
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| 125. |
A good fodderA. Contains high dry matterB. Is free from disease and pestC. Has nutrient without toxicityD. All of these |
| Answer» Correct Answer - D | |
| 126. |
Pyrethrin is extracted fromA. Azadirachta indicaB. Helianthus annusC. Poa indicaD. Chrysanthemum cinerarifolium |
| Answer» Correct Answer - D | |
| 127. |
Crop rotation is carried out forA. Increasing acidity of soilB. Decreasing fertility of soilC. Increasing fertility of soilD. All of above |
| Answer» Correct Answer - C | |
| 128. |
A legume having symbiotic association with two nitrogen fixing bacteria (Rhizobium and Aerospirillum ) isA. Crotalaria junceaB. Sesbania aculeataC. Sesbania rostrataD. Cyamopsis tetragonoloba |
| Answer» Correct Answer - C | |
| 129. |
Assertion:Compost is formed after decay of vegetable matter and organic refuse Reason:Green manure is prepared by ploughing back any green plants into soil.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If the assertion and reason both are false. |
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Answer» Correct Answer - C Compost is a prepared mixture made of rotted vegetable matter and manure. An enriched composited manure is made by dumping all kinds of plant matter including garbage of vegetable markets and other organic refuse in heaps Interspersed by the thin sprinkling of chemical fertilizers like ammonium sulphate, superphosphate, sodium nitrate, lime etc. It requires-6 months for preparation of manure. Green manure is prepared from young, green crop plants by ploughing them back into soil. Usually young leguminous crops are used for green manuring because they also increase the nitrogen fertility of the soil. The plants are slowly converted into manure through the activity of micro organisms. |
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| 130. |
Green manure plants belong toA. CompositaeB. SolanaceaeC. PoaceaeD. Leguminosae |
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Answer» Correct Answer - D Young leguminous crops are used for green manuring because they increase the nitrogen fertility of soil e.g., Crotalaria juncea, Sesbania aculeata, etc. |
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| 131. |
Methanogenic bacteria are not found inA. Rumen of cattleB. Gobar gas plantC. Bottom of water-logged paddy fieldsD. Activated sludge |
| Answer» Correct Answer - D | |
| 132. |
Brown Plant Hopper isA. Nilparavata lugensB. Calliphora erythrophalaC. Helizoverpa armigeraD. Schistocerea gregaria |
| Answer» Correct Answer - A | |
| 133. |
Nitrogen content of urea isA. `26%`B. `56%`C. `46%`D. `36%` |
| Answer» Correct Answer - C | |
| 134. |
Which one is a nonsymbiotic nitrogen fixerA. RhizobiumB. OscillatoriaC. NostacD. Lactobacillus |
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Answer» Correct Answer - C Nostoc is a free living nitrogen-fixing blue green algae probably with the help of heterocysts. Photosynthesis provides the energy for nitrogen fixation. |
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| 135. |
Yield of paddy field can be increased by application ofA. Iron bacteriaB. Nostoc/AnabaenaC. ArchaebacteriaD. Symbiotic bacteria |
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Answer» Correct Answer - B They are the free living nitrogen fixing cyanobacteria and increase nitrogen content of moist soil and water bodies, which can be used in increasing paddy yield. |
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| 136. |
Azolla enriches rice fields with nitrogen due to its association with Or A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla isA. AnabaenaB. NostocC. RhizobiumD. Frankia |
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Answer» Correct Answer - A Azolla pinnata contains symbiont Anabaena in its leaf cavities. It is often inoculated to rice fields for nitrogen fixation. |
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| 137. |
Which of the following plants are used as green manure in crop fields and in sandy soilsA. Dicanthium annulatum and Azolla pinnataB. Crotalaria juncea and Alhagi camelorumC. Calotropis procera and Pitylanthus niruriD. Saccharum munja and Lantana camara |
| Answer» Correct Answer - B | |
| 138. |
Fuel wood isA. Source of petroleum prouductsB. Renewable resource of energyC. Source of biogasD. Source of alcohol |
| Answer» Correct Answer - A | |
| 139. |
Some blue green algae can be used as biofertilizer as they areA. PhotosynthesisB. Surrounded by mucilageC. Growing evergy whereD. Capable of fixing nitrogen |
| Answer» Correct Answer - D | |
| 140. |
The common nitrogen-fixer in paddy fields isA. FrankiaB. RhizobiumC. Azospirillum (B.G.A)D. Oscillatoria |
| Answer» Correct Answer - C | |