General Q&A for Class 12 · Page 23
5,215 free answers in General for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
How many months have 31 days?
There are seven months in a year that have 31 days. These months are: January (31 days) March (31 days) May (31 days) July (31 days) August (31 days) October (31 days) December (31 days) The other months have fewer days: February has 28 days in a common year and 29 days in a leap year. April, June, September, and November each have 30 days. Remember the old rhyme to recall the number of days in each month:
- GeneralClass 12All
How many hearts does an octopus have?
An octopus has three hearts. Two of these hearts are called branchial hearts, and the third is called the systemic heart. Here's a brief explanation of the function of each heart: Two Branchial Hearts: The branchial hearts are responsible for pumping blood through the gills, where oxygen is extracted from water and carbon dioxide is released. Each branchial heart is located near a gill, and they help facilitate the oxygenation of the octopus's blood. One Systemic Heart
- GeneralClass 12All
How many weeks in a month?
The number of weeks in a month is not constant because months vary in length due to the irregular number of days. However, on average: A common year has 12 months with 4 weeks each. This adds up to 48 weeks in a year. A leap year has one extra day in February, making it 29 days instead of 28. In a leap year, the total number of weeks is 52. It's important to note that the number of days in a month can be 28, 30, or 31, except for February in a leap year, which has 29 d
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How many years British ruled India?
The British ruled India for about 200 years, from the mid-18th century to 1947. The period of direct British colonial rule in India is often divided into two main phases: East India Company Rule (1757–1858): The East India Company, a British trading company, gradually expanded its influence in India through a series of wars and treaties. The pivotal moment came with the Battle of Plassey in 1757, after which the East India Company effectively controlled Bengal. Over the
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Who discovered cell and how?
The discovery of the cell is credited to the work of the English scientist Robert Hooke. In 1665, Hooke published a book titled "Micrographia," in which he described his observations through a microscope. In one part of the book, Hooke reported his observations of cork, a material obtained from the bark of an oak tree. In his microscopic observations of cork, Hooke noted small, box-like structures that reminded him of the small rooms or cells that monks inhabited. He termed these stru
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How does chemical coordination take place in animals?
Chemical coordination in animals involves the release of signaling molecules called hormones from endocrine glands. These hormones travel through the bloodstream to target cells or organs, where they exert their effects. The endocrine system, along with the nervous system, plays a crucial role in maintaining homeostasis and coordinating various physiological processes in the body. Here's a general overview of how chemical coordination takes place in animals: Endocrine Glands:</
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How many countries in G-20?
The Group of Twenty (G-20) is an international forum for governments and central bank governors from 19 countries and the European Union. The G-20 member countries are: Argentina Australia Brazil Canada China France Germany India Indonesia Italy Japan Mexico Russia Saudi Arabia South Africa South Korea Turkey United Kingdom United States
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How much water should I drink a day?
The amount of water a person needs to drink each day can vary based on factors such as age, sex, weight, physical activity level, and climate. However, a general guideline recommended by health authorities is the "8x8 rule," which suggests drinking eight 8-ounce glasses of water a day, totaling about 2 liters or half a gallon. Another recommendation comes from the U.S. National Academies of Sciences, Engineering, and Medicine, which suggests a daily water intake, including all beverag
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How many continents?
There are seven continents on Earth. These continents are large landmasses that are separated by oceans. Here is a list of the continents: Africa: The second-largest continent, known for its diverse cultures, wildlife, and geography. Antarctica: The southernmost continent, mostly covered in ice and surrounded by the Southern Ocean. Asia: The largest continent, home to a wide range of cultures, landscapes, and diverse populations. Europe: A continent with a rich
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How are rainbows formed?
Rainbows are formed by the refraction, dispersion, and reflection of sunlight in water droplets in the atmosphere. The process involves the following key steps: Sunlight Entering Raindrops: Rainbows are most commonly observed when sunlight passes through raindrops in the atmosphere. The sunlight is made up of various colors, which we perceive as white light. Refraction of Light: As sunlight enters a raindrop, it undergoes refraction. Refraction is the bending o
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How many types of computer?
Computers come in various types, each designed for specific purposes and tasks. Here are some common types of computers: Personal Computers (PCs): Desktops: Traditional computers with a separate monitor, keyboard, and CPU. Laptops: Portable computers with an integrated screen and keyboard. Servers: Designed to manage network resources and provide services to other computers (e.g., web servers, file servers). Mainframes: Powerful computer
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How many people in India?
As of my last knowledge update in January 2022, India is the second-most populous country in the world. The population of India is estimated to be over 1.3 billion people. However, please note that population figures are subject to change due to factors such as birth rates, death rates, migration, and other demographic factors. For the most current and accurate population information, it is recommended to refer to official sources such as the Census of India or other government public
- GeneralClass 12All
How many cities in India?
As of my last knowledge update in January 2022, India has numerous cities, and the exact count may change over time due to urbanization, administrative changes, and population growth. India has a large number of cities, and the specific count can depend on the criteria used for classification (urban population size, administrative status, etc.). As of 2021, India has more than 4,000 cities and towns. Some of the major metropolitan cities in India include Delhi, Mumbai, Kolkata, Chenna
- GeneralClass 12All
How many rivers in India?
India is crisscrossed by numerous rivers, both large and small, due to its extensive network of water bodies. The exact number of rivers in India can be challenging to determine as it depends on the criteria used for classification and the consideration of tributaries. However, India is home to several major rivers. Some of the most prominent rivers include: Ganges (Ganga): One of the holiest rivers in Hinduism, flowing through northern India. Yamuna: A major tributary of the
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How many colors are in the rainbow?
The colors of the rainbow, traditionally remembered by the acronym "ROYGBIV," represent the sequence of colors that appear when white light is dispersed. The colors of the rainbow, in order, are: **Red Orange Yellow Green Blue Indigo Violet** These seven colors make up the spectrum of visible light. It's important to note that the colors of the rainbow exist on a continuous spectrum, and the division into seven distinct colors is
- GeneralClass 12All
How to calculate mode?
The mode is the value that appears most frequently in a data set. To calculate the mode, follow these steps: For Ungrouped Data: Organize Data: Organize the data in either ascending or descending order. Count Frequencies: Count the frequency (number of occurrences) of each value. Identify Modes: Identify the value(s) with the highest frequency. If there is more than one mode, the data set is multimodal. For Grouped Data:
- GeneralClass 12All
How do earthquakes occur?
Earthquakes occur due to the sudden release of energy in the Earth's crust that creates seismic waves. This release of energy is usually caused by the movement of tectonic plates, which are large pieces of the Earth's lithosphere that float on the semi-fluid asthenosphere beneath them. Here's a step-by-step explanation of how earthquakes occur: Tectonic Plate Movement: The Earth's lithosphere is divided into several large and rigid plates. These plates are in co
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How many square feet in one acre?
One acre is equal to 43,560 square feet. This is a standard unit of measurement for land area in the United States and many other countries that use the imperial system. The acre is commonly used in real estate and agriculture to describe the size of large plots of land.
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How to pronounce enormous?
The word "enormous" is pronounced as /ɪˈnɔːrməs/ in the International Phonetic Alphabet (IPA). Here's a simplified guide to help with the pronunciation: ee-NOR-muhs The stress is on the second syllable, indicated by the capital letters "NOR." The "e" in the first syllable is pronounced as "ee," and the "o" in the second syllable is pronounced as "uh."
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How to pronounce pronunciation?
The word "pronunciation" is pronounced as /prəˌnʌn.siˈeɪ.ʃən/ in the International Phonetic Alphabet (IPA). Here's a simplified guide to help with the pronunciation: pro-nun-see-AY-shun The stress is on the third syllable, indicated by the capital letters "AY." The "u" in "pronunciation" is pronounced as "uh," and the "o" in "pronounce" is pronounced as a short "o" sound.