Questions and Answers
Which of the following is NOT a use of coke?
What is referred to as 'Black Gold'?
Which of the following statements is incorrect?
Under what conditions are dead plants converted to coal?
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Which of the following is a suggested step for using fossil fuels judiciously?
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What happens when air is passed through red hot coke?
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Which of the following is an exhaustible natural resource?
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What is the primary use of bitumen?
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What will be the effect of sowing wheat in the kharif season for Raghu?
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Why are Indian farmers concerned about the 'Terminator Seed Technology'?
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Which rabi and kharif crop combination will replenish the soil with nitrogen?
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What characteristic of the seeds in Akshat's pots will be affected by the soil amendments?
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Which of the following plants is likely to show poor germination due to kharif conditions?
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What is a direct consequence of waterlogging in kharif season for crops?
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Why might chemical fertilizers not be the best choice for Akshat's pots?
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What type of crop is typically cultivated during the rabi season?
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What is the metal present in the hormone insulin?
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Which non-metal is used in a purple color solution as an antiseptic?
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Which option represents the decreasing order of reactivity of the metals?
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Which type of soil is most conducive for microorganism growth?
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What contributes to the high density of metals?
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What is a recommended precaution for preventing seed insect infestations?
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Which metal will not react completely with dilute sulphuric acid to form a salt and hydrogen gas?
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Which of the following is NOT a measure to increase crop yield?
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Which attributes should be considered while selecting seeds for sowing?
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What property of a metal is used to make musical instruments?
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Which statement about aluminium is incorrect?
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What is the primary role of fertilizers in agriculture?
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What happens in dry soil concerning microorganism growth?
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Which reaction is feasible?
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Which agricultural practice can help control plant diseases?
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Which of the following seed attributes does NOT contribute to successful sowing?
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What is the term for the process in which a substance reacts with oxygen to produce heat?
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Which type of fuel can exist in solid, liquid, or gas forms?
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What is the lowest temperature at which a substance catches fire called?
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What are the three essential requirements for producing fire?
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What happens to a vapor in a fractionating column when it reaches a height with a temperature equal to its boiling point?
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Which of the following substances can easily catch fire with a flame?
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What is the term for the conversion of solid coal into gas?
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What may happen if one of the essential requirements for fire is removed?
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Study Notes
Growth and Multiplication of Microorganisms
- Wet soil facilitates better growth of microorganisms as it holds more air and water, promoting multiplication.
- Dry soil restricts air and water, slowing down microbial growth.
- Loose soil increases microbial activity due to increased aeration and water retention.
- Tight soil hinders growth as it lacks sufficient air and water.
Seed Precautions Against Insects
- Sowing seeds properly prevents insect infestations.
- Healthy plants should be selected for sowing to minimize risk.
- Implement timely inspections of storage to detect any infestations early.
- Spraying chemicals beforehand can provide an additional layer of protection.
Selecting Seeds for Sowing
- Seeds should be clean and healthy, disease-resistant, and freshly stored.
- Bigger seed size is preferable for better growth.
- Selection should consider scientific methods for improved soil fertility and pest control.
- Good quality seeds and awareness of new agricultural technology boost yield.
Role of Fertilizers
- Fertilizers provide specific nutrients essential for rapid crop development.
- They are crucial for the overall health and growth of soil/crops.
Impact of Mistaken Sowing
- Sowing wheat in the kharif season leads to reduced air in the soil due to waterlogging.
- Waterlogging can prevent germination of wheat seeds.
Concerns with Terminator Seed Technology
- Farmers are concerned as Terminator seeds lead to sterile plants that do not produce viable seeds.
Crop Rotation for Nitrogen Replenishment
- Practice crop rotation using legumes to replenish nitrogen in soil.
- Example of suitable rabi and kharif crop combinations includes wheat with legumes like pea or soyabean.
Properties and Uses of Coke
- Coke is a fuel with a low impurity and carbon content, used in steel manufacturing and as a reducing agent.
- It is not used for producing photographic materials.
Fractionating Column in Distillation
- Various fractions are obtained based on their boiling points during the distillation process.
- Vapors condense into liquid at heights matching their boiling points.
Combustion and Flame
- Combustion involves a reaction between a combustible substance and oxygen producing heat.
- Inflammable substances like petrol have low ignition temperatures and can easily catch fire.
- Essential requirements for fire include fuel, air, and heat, any of which can be removed to control fire.
Characteristics of Metals
- Noble metals (e.g., gold, silver) resist reactions with air and water, maintaining their lustre.
- Metals exhibit properties like ductility and malleability, important for applications like musical instruments.
Reactivity of Metals
- The order of reactivity in metals varies; potassium is the most reactive.
- Certain metals (e.g., lead, calcium) do not react completely with dilute sulfuric acid.
Aluminium Characteristics
- Aluminium exhibits unique characteristics: it is malleable, ductile, and primarily forms covalent compounds.
- It is extracted from its ore, bauxite.
Studying That Suits You
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Description
This quiz explores the various factors influencing the growth and multiplication of microorganisms in different soil conditions. Participants will learn about the relationship between soil type and microbial activity, emphasizing the advantages and disadvantages of wet vs. dry soil. Test your understanding of how soil conditions affect microorganism growth!
