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  • Gyaneshwari

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    May 7, 2021 at 2:17 pm in reply to: What happens when metals react with acids?
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    Acid is a corrosive liquid. However when it reacts with some objects or metals it produces some gas.
    Most metals react with acids, but not all. Nevertheless, not all metals react in the same way to acids.

    When an acid reacts with metal, salt and hydrogen gas are produced.

    The general equation that describes the chemical reaction between an acid and metal is :- metal + acid = salt + hydrogen gas.

    Example

    Zinc powder reacts with hydrochloric acid that releasesH<sub>2</sub> gas and zinc chloride.

    Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)

    These reactions are exothermic reactions. The reaction rate depends on the metal used and how high up it is in the reactivity series.

    https://youtu.be/9hBCLoWwcWo

    Hydrogen can be tested in such chemical reactions by the squeaky pop sound it produces when burnt after the metal acid reaction with the help of a candle or any other fire source.

  • Gyaneshwari

    Member
    May 10, 2021 at 2:36 pm in reply to: What are fundamental rights? Explain.
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    Fundamental rights are the basic human rights enshrined in the Constitution of India which are guaranteed to all citizens. These rights are given to each and every individual of the country without discrimination on the basis of race, religion, gender, etc.

    List of Fundamental Rights

    There are six fundamental rights of Indian Constitution along with the constitutional articles related to them are mentioned below:

    Right to Equality (Article 14-18)

    Right to Freedom (Article 19-22)

    Right against Exploitation (Article 23-24)

    Right to Freedom of Religion (Article 25-28)

    Cultural and Educational Rights (Article 29-30)

    Right to Constitutional Remedies (Article 32)

    the fundamental rights in India and briefly described

    1. Right to Equality (Articles 14 – 18)

    Right to equality guarantees equal rights for everyone, irrespective of religion, gender, caste, race or place of birth. It ensures equal employment opportunities in the government and insures against discrimination by the State in matters of employment on the basis of caste, religion, etc. This right also includes the abolition of titles as well as untouchability.

    2. Right to Freedom (Articles 19 – 22)

    Freedom is one of the most important ideals cherished by any democratic society. The Indian Constitution guarantees freedom to citizens. The freedom right includes many rights such as:

    Freedom of speech

    Freedom of expression

    Freedom of assembly without arms

    Freedom of association

    Freedom to practise any profession

    Freedom to reside in any part of the country

    Some of these rights are subject to certain conditions of state security, public morality and decency and friendly relations with foreign countries. This means that the State has the right to impose reasonable restrictions on them.

    3. Right against Exploitation (Articles 23 – 24)

    This right implies the prohibition of traffic in human beings, begar, and other forms of forced labour. It also implies the prohibition of children in factories, etc. The Constitution prohibits the employment of children under 14 years in hazardous conditions.

    4. Right to Freedom of Religion (Articles 25 – 28)

    This indicates the secular nature of Indian polity. There is equal respect given to all religions. There is freedom of conscience, profession, practice and propagation of religion. The State has no official religion. Every person has the right to freely practice his or her faith, establish and maintain religious and charitable institutions.

    5. Cultural and Educational Rights (Articles 29 – 30)

    These rights protect the rights of religious, cultural and linguistic minorities, by facilitating them to preserve their heritage and culture. Educational rights are for ensuring education for everyone without any discrimination.

    6. Right to Constitutional Remedies (32 – 35)

    The Constitution guarantees remedies if citizens’ fundamental rights are violated. The government cannot infringe upon or curb anyone’s rights. When these rights are violated, the aggrieved party can approach the courts.

  • Gyaneshwari

    Member
    May 10, 2021 at 3:13 pm in reply to: What is photosynthesis
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    Photosynthesis is a biological process that converts the raw materials of carbon dioxide and water into glucose and oxygen.Photosynthesis is the process by which green plants can prepare their own food. ‘Photo’ means light and ‘synthesis’ means production or preparation. Therefore, the process of photosynthesis involves preparation of food using light from the Sun.

    The process of photosynthesis is carried out in the leaves of green plants. The raw materials required for photosynthesis are : light (obtained from sunlight), water (obtained from the soil by the roots) and carbon dioxide (from the air). Using these raw materials and in the presence of the green-coloured pigment chlorophyll, plants prepare glucose, which can be burnt to provide energy in all organisms. Another important byproduct of photosynthesis is oxygen, which helps most organisms to sustain.

    It generally occurs in the leaves of green plants and requires light energy in order to make the reaction happen. (It is a photochemical reaction as it requires light and it is endothermic as it absorbs energy)

    Photosynthesis itself occurs in chloroplasts which contain the green pigment known as chlorophyll.

    The equations for this reaction are.

    carbon dioxide + water → glucose + oxygen

    6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

    The glucose produced is then used by the plant in order to allow respiration which releases energy needed for the plant. The glucose can also be stored by the plant as starch or converted into many other useful products.

  • Gyaneshwari

    Member
    May 10, 2021 at 2:49 pm in reply to: How to find rhyming scheme?
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    A rhyme is the repetition of similar sounding syllables, generally at the end of two words. In a poem, the rhyme scheme refers to the pattern of rhyming words found within lines of a poem. While the rhyme scheme specifically refers to the pattern of end rhymes, other types of rhymes, including feminine rhymes and internal rhymes, exist in poetry

    Finding End Rhyme Scheme

    Read the first line of the poem and highlight the last word in your first color.

    Read the second line of the poem to determine whether the last syllable of the line matches — in sound — the first line.

    Highlight the second line in the same color as the first line for a similar sound or highlight in a second color for a different sound.

    Repeat the third step with the next line of the poem.

    Label the matching sounds with the same letter. For example, all sounds matching the first line are labeled “A” while all sounds matching the second sound are labeled “B.”

    Write the rhyme scheme based on the number of different end syllable sounds. ABAB is an example of a common rhyme scheme indicating that the first and third lines end in the same sound while the second and fourth lines end in the same syllable.

    Here are the 8 most common ones used. There are other types as well.

    Alternate rhyme: it rhymes as “ABAB CDCD EFEF GHGH.”

    Ballade: It contains three stanzas with rhyme scheme of “ABABBCBC” followed by “BCBC.”

    Monorhyme: It is a poem in which every line uses the same rhyme scheme.

    Couplet: It contains two line stanzas with “A, A,” rhyme scheme that often appears as “A,A, B,B, C,C and D,D…”

    Triplet: It often repeats like a couplet, uses rhyme scheme of “AAA.”

    Enclosed rhyme: It uses rhyme scheme of “ABBA”

    Keats Odes rhyme scheme: In his famous odes, Keats has used a specific rhyme scheme, which is “ABABCDECDE.”

    Limerick: A poem uses five lines with rhyme scheme of “AABBA.”

    Example:

    Twinkle Twinkle Little Star

    Twinkle, twinkle, little star, (A)

    How I wonder what you are. (A)

    Up above the world so high, (B)

    Like a diamond in the sky. (B)

  • Gyaneshwari

    Member
    May 10, 2021 at 3:04 pm in reply to: Why do pressure decreases as height increases?
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    As altitude/height rises, air pressure drops. In other words, if the indicated altitude is high, the air pressure is low.

    This happens for two reasons. The first reason is gravity. Earth’s gravity pulls air as close to the surface as possible.

    All matter, whether fluid (liquid & gas) of solid, is attracted to the Earth’s center of gravity. The pressure increase with depth in water may be more obvious to your senses, since you will feel the effect of the increase in pressure with depth simply by diving to a depth of a few meters. You can feel things happening in your ears and sinuses, and if you are wearing goggles, you can feel them being pressed into your face. The second reason is density. As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by “thin air.” Thin air exerts less pressure than air at a lower altitude.

    The second reason is density. As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by “thin air.” Thin air exerts less pressure than air at a lower altitude.

    <b style=”font-family: inherit; font-size: inherit;”>High-altitude locations are usually much colder than areas closer to sea level. This is due to the low air pressure. Air expands as it rises, and the fewer gas molecules—including nitrogen, oxygen, and carbon dioxide—have fewer chances to bump into each other.

    The human body reacts to high altitudes. Decreased air pressure means that less oxygen is available for breathing. One normal effect of altitude is shortness of breath, since the lungs have to work harder to deliver oxygen to the bloodstream. It can take days and even weeks for a body to adjust to high altitude and low air pressure.

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