General Q&A for Class 12 · Page 18
5,215 free answers in General for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
Why should we conserve forests and wildlife?
Conserving forests and wildlife is essential for a variety of reasons, encompassing ecological, economic, social, and ethical considerations. Here are some key reasons why the conservation of forests and wildlife is crucial: Biodiversity Conservation: Forests are home to a vast array of plant and animal species, contributing significantly to global biodiversity. Conservation efforts help preserve this diversity, ensuring the survival of various species and maintaining healthy ecosyste
- GeneralClass 12All
Why should we conserve biodiversity?
Conserving biodiversity is crucial for several reasons, and it has far-reaching implications for the well-being of ecosystems, human societies, and the planet as a whole. Here are some key reasons why biodiversity conservation is important: Ecological Balance: Biodiversity contributes to the stability and resilience of ecosystems. A diverse array of species provides a balance in ecological processes, such as nutrient cycling, pollination, and pest control, which are essential for main
- GeneralClass 12All
Why do ionic compounds have a high melting point?
Ionic compounds typically have high melting points because of the strong electrostatic forces of attraction between the positively and negatively charged ions within the crystal lattice structure. Ionic compounds consist of positively charged ions (cations) and negatively charged ions (anions) that are held together by electrostatic forces known as ionic bonds. Here are the main factors contributing to the high melting points of ionic compounds: Electrostatic Forces: In an ion
- GeneralClass 12All
Why are resources distributed unequally over the earth?
The unequal distribution of resources on Earth is influenced by a combination of geological, geographical, historical, and environmental factors. Here are some key reasons contributing to the uneven distribution of resources: Geological Processes: Earth's geological processes have played a significant role in the distribution of resources. Mineral deposits, for example, are often concentrated in specific geological formations and regions. The result is that certain areas have abundant
- GeneralClass 12All
Why are women employed in low-paid work?
The phenomenon of women being employed in low-paid work is complex and stems from a combination of historical, cultural, social, and economic factors. Several interconnected factors contribute to the gender wage gap and the concentration of women in lower-paid occupations. Here are some key reasons: Occupational Segregation: Women are often concentrated in specific industries and occupations that have traditionally been associated with female workers. These sectors, such as caregiving
- GeneralClass 12All
Why do we get instant energy from glucose?
Glucose is a simple sugar and a primary source of energy for the body. When we consume glucose, it can quickly enter metabolic pathways to produce energy. Here are the reasons why glucose provides relatively instant energy: Quick Breakdown in Glycolysis: Glucose undergoes glycolysis, a series of biochemical reactions that occur in the cytoplasm of cells. During glycolysis, one molecule of glucose is broken down into two molecules of pyruvate, producing a small amount of ATP (adenosine
- GeneralClass 12All
Is it important to increase the area under irrigation why
Increasing the area under irrigation is considered important for several reasons, and it has implications for food security, agricultural productivity, and overall economic development. Here are some key reasons why increasing the area under irrigation is often seen as important: Enhanced Agricultural Productivity: Irrigation provides a consistent and reliable water supply to crops, reducing dependence on rainfall. This ensures that crops receive adequate moisture, especially during d
- GeneralClass 12All
Why is India called a subcontinent?
India is referred to as a subcontinent because of its large size and distinct geographical features that set it apart from the surrounding regions. A subcontinent is a large, relatively self-contained landmass that is part of a larger continent. The Indian subcontinent is a major subdivision of the Asian continent, and it is characterized by several distinguishing features: Geographical Size: The Indian subcontinent is geographically significant due to its considerable size. It encomp
- GeneralClass 12All
Why are mitochondria called the powerhouse of the cell?
Mitochondria are often referred to as the "powerhouse of the cell" due to their central role in energy production. Mitochondria are cellular organelles that carry out aerobic cellular respiration, a process that generates adenosine triphosphate (ATP), the primary energy currency of cells. Several features contribute to the characterization of mitochondria as the powerhouse of the cell: ATP Production: The main function of mitochondria is to produce ATP through aerobic respiration. Dur
- GeneralClass 12All
Why is the issue of sustainability important for development?
The issue of sustainability is crucial for development for several reasons, and it encompasses economic, social, and environmental considerations. Here are some key reasons why sustainability is important for development: Preserving Resources for Future Generations: Sustainable development seeks to meet the needs of the present without compromising the ability of future generations to meet their own needs. This involves responsible use and management of natural resources to ensure the
- GeneralClass 12All
Why is water wet?
The sensation of wetness associated with water is a result of the unique properties of water and its interaction with our sensory perception. Adhesion and Cohesion: Water molecules are polar, with a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom. This polarity results in strong hydrogen bonding between water molecules. The cohesive forces between water molecules cause them to stick together, creating a liquid with high surface tension. A
- GeneralClass 12All
Why is respiration considered an exothermic reaction explain?
Cellular respiration is considered an exothermic reaction because it releases energy in the form of heat. Cellular respiration is the process by which cells break down glucose (or other organic molecules) to produce energy in the form of adenosine triphosphate (ATP). The overall chemical reaction for cellular respiration can be simplified as: C6H12O6+6O2→6CO2+6H2O+energy (ATP) This reaction involves the o
- GeneralClass 12All
what is shifting cultivation what are its disadvantage?
Shifting cultivation, also known as "slash-and-burn agriculture" or "swidden farming," is an agricultural practice that has been used by various indigenous communities in different parts of the world. This method involves clearing a patch of land, usually in a forested area, and cultivating crops for a few years before moving on to a new plot of land. The cleared area is typically burned before planting to release nutrients from the burned vegetation. Here are some key features of shi
- GeneralClass 12All
what do you think a telebook is?
As of my last knowledge update in January 2022, the term "telebook" does not have a widely recognized or established meaning in the English language or in common usage. It is possible that new terms and concepts have emerged since then, or "telebook" could be a specialized or niche term used in a particular context or industry that I am not aware of. If "telebook" is a new term or concept that has emerged after my last update, I recommend checking the latest sources or references in t
- GeneralClass 12All
what are shrubs?
Shrubs are a category of plants characterized by their woody stems or stems that are persistently above ground, in contrast to herbaceous plants, which have non-woody, soft stems. Shrubs are an important and diverse group of plants, and they vary in size, shape, and characteristics. Here are some key features and characteristics of shrubs: Woody Stems: The defining feature of shrubs is their woody, perennial stems. These stems are typically covered in bark and can persist above ground
- GeneralClass 12All
what is the isothermal process?
An isothermal process is a thermodynamic process in which the temperature of a system remains constant throughout the entire process. In other words, during an isothermal process, the system does not experience any change in temperature. This is typically achieved by maintaining the system in thermal equilibrium with its surroundings, which means that heat is added to or removed from the system to counteract any temperature changes caused by the process. Key characteristics and concep
- GeneralClass 12All
what are the characteristics of a political party?
Political parties are organizations that play a crucial role in democratic systems by representing the interests and ideologies of various groups of citizens. They exhibit several key characteristics that distinguish them from other political entities and organizations. Here are some of the main characteristics of political parties: Organized Structure: Political parties have a formal organizational structure that includes leaders, members, and various levels of hierarchy, such as loc
- GeneralClass 12All
what is heating effect of electric current?
The heating effect of electric current, also known as "Joule heating" or "resistive heating," refers to the phenomenon in which electrical energy is converted into heat energy when an electric current passes through a conductor with resistance. This effect is a fundamental principle of electricity and is responsible for the operation of many electrical devices, including electric heaters, toasters, and incandescent light bulbs. Here's how the heating effect of electric current works:<
- GeneralClass 12All
what is zero order reaction?
A zero-order reaction is a type of chemical reaction in which the rate of reaction is independent of the concentration of one or more of the reactants. In a zero-order reaction, the rate of reaction remains constant over time, and it is not influenced by changes in the concentration of the reactants. The general form of a zero-order reaction can be expressed as follows: Rate = k Where: "Rate" is the rate of the reaction (the change in concentration of a reactan
- GeneralClass 12All
what is common ion effect?
The common ion effect is a phenomenon in chemistry that occurs when the addition of an ion already present in a solution affects the solubility or the equilibrium of a sparingly soluble salt. This effect can lead to the reduction in the solubility of the salt and, consequently, the precipitation of the salt from the solution. Here's how the common ion effect works: Sparingly Soluble Salt: Consider a sparingly soluble salt that only partially dissolves in water, creating an equ