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    • Posted by Puchakayala Prasannanjali 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Yogita Ingle 5 years, 3 months ago

    Isotopes are elements with same atomic number but different mass which in this case is 11​Na22 and 11​Na24.

    Isobars are elements with same number of nucleons which in this case are 12​Mg24 and 11​Na24.

    Isotones are elements with same number of neutrons, which in this case are 11​Na24 and 10​Ne23.

     

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    • Posted by Triloki Majhi 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Rohit Das 5 years, 3 months ago

    After setting of industries near water bodies where people's use to do fishing they start feeling I'll because the toxic substances which was released by the industries get mix with water and fish'es use to drink that water which was harmful for there body and after that when they eat that fish they also fell ill due to the toxic substances which was taken by the fish .

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    • Posted by Shubham Saxena ???? 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 4 answers

    Malaika Sharma 5 years, 3 months ago

    Arteries:1.Arteries carry blood away from heart to various organs of the body. 2.Arteries have thick walls. 3.Valves are absent. Veins:1.Veins collect the blood from different organs and bring it back to the heart. 2.Veins have thin walls. 3.Valves are present.

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    Shubham Saxena ???? 5 years, 3 months ago

    ,, [define the electric circuit ]. ???? What are you saying I don't understand .

    1Thank You

    Preeti Vyapari 5 years, 3 months ago

    Defina the electric circuit

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    Shubham Saxena ???? 5 years, 3 months ago

    I know answer but can you explain . Please

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    • Posted by Lavesh Sahu 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 3 answers

    Sahil Kumar 5 years, 3 months ago

    By hit and trial method

    1Thank You

    Shubham Saxena ???? 5 years, 3 months ago

    I hope you understand.

    1Thank You

    Shubham Saxena ???? 5 years, 3 months ago

    Identify each element found in the equation. The number of atoms of each type of atom must be the same on each side of the equation once it has been balance. What is the net charge on each side of the equation? The net charge must be the same on each side of the equation once it has been balanced. If possible, start with an element found in one compound on each side of the equation. Change the coefficients (the numbers in front of the compound or molecule) so that the number of atoms of the element is the same on each side of the equation. Remember, to balance an equation, you change the coefficients, not the subscripts in the formulas. Once you have balanced one element, do the same thing with another element. Proceed until all elements have been balanced. It's easiest to leave elements found in pure form for last. Check your work to make certain the charge on both sides of the equation is also balanced. Thank you.....

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    • Posted by Diksha Joshi 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Yogita Ingle 5 years, 3 months ago

    The principle of the electric motor is based on the fact that a current carrying conductor produces a magnetic field around it. A current carrying conductor placed perpendicular to magnetic field experiences a force.

    1Thank You

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    • Posted by Ankit Kumar 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Yogita Ingle 5 years, 3 months ago

    The mode of nutrition in Amoeba is holozoic.

    <a data-download-href="https://ask.learncbse.in/uploads/db3785/1bdc443fbba9bc4dcefbbbe4769321e896e88baf" href="https://ask.learncbse.in/uploads/db3785/original/2X/1/1bdc443fbba9bc4dcefbbbe4769321e896e88baf.jpg" title="image.jpg"></a>

    The various steps involved in the process of nutrition are:
    Ingestion:     Amoeba ingests food with the help of its finger-like extensions, called pseudopodia. When a food particle approaches Amoeba, it forms pseudopodia around it and forms a food vacuole inside the Amoeba.
    Digestion: Various enzymes from the cytoplasm enter into the food vacuole and break them down into simple soluble molecules.
    Absorption: The simple soluble food is absorbed by cytoplasm of Amoeba from food vacuoles through the process of diffusion.
    Assimilation: Amoeba cell obtains energy from the absorbed food through respiration. This energy is utilised by Amoeba for its growth and repair of the body.
    Egestion: When a considerable amount of undigested food gets collected inside Amoeba, its cell membrane ruptures and throws out the undigested food.

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    Dipak Gavande 5 years, 3 months ago

    Gallo

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    • Posted by Gunjan Gupta 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 0 answers
    ANSWER

    • Posted by Abc Xyz 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

    Horticulture is an important part of agriculture with many important crops being vegetatively propagated. The objectives of this work were to discuss some of the most important characteristics of vegetatively propagated crops and the breeding strategies to develop and propagate new cultivars. Vegetative propagation enables to fix favorable combinations of important traits, very specific chemical compositions, superior genetic variance interactions and high levels of heterozygosity. Breeding new cultivars involve few possibilities of genetic recombination by sexual reproduction and many generations of selection and vegetative propagation. Marker assisted selection should be useful for genotyping and selecting complementary parents for crossing and for identifying superior genotypes at early stages of selection. The tissue culture technique enables to get disease free stock plants and to maximize its multiplication rate, having an important role in yield and quality of these crops.

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    • Posted by Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 5 answers

    Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

    This question is not of mathematics... but anyways I understood it thanks for your help?

    1Thank You

    Shubham Saxena ???? 5 years, 3 months ago

    Your welcome,, and if you haven't understood so you can watch videos of mathematics and ask your doubt from your mathematics teacher.

    2Thank You

    Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

    ok thanx for your help I understood the answer

    1Thank You

    Priya ✧*｡٩(๑˙╰╯˙๑)و✧*｡ 5 years, 3 months ago

    I have one doubt

    2Thank You

    Shubham Saxena ???? 5 years, 3 months ago

    Magnetic field at center due to one ring is B. Hence, due to n ring is B, B=nB1​ where n=500turns. B1​=2rμ0​I​ where I=current through ring, r=radius of ring. B=500×2×π×10−24π×10−7×5​=5×10−2=0.05T

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    • Posted by Maahi ......♾ 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Vaibhav Bajpayee 5 years, 3 months ago

    Hxx

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    Shubham Saxena ???? 5 years, 3 months ago

    Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc is more reactive than iron, so it oxidises in preference to the iron object. Thank you.

    2Thank You

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    • Posted by Maahi ......♾ 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Shubham Saxena ???? 5 years, 3 months ago

    Minerals are those substance that occur naturally in the earth's crust whereas those minerals which have high percentage of a particular metal and from which metal can be extracted profitably are called ores. Hence , All ores are called minerals. ... Therefore all minerals are not ores.

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    • Posted by Roushan Kumar 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Shubham Saxena ???? 5 years, 3 months ago

    No, not quite. Dissolving something in water does not break the chemical bonds of the molecule*. You still have NaClNaCl molecules floating about. That would leave you with elemental sodium and elemental chlorine, and those two fellows are a bit like drunk bikers. Mixing sodium, chlorine and water will produce all sorts of things like sodium hypochorite (NaClONaClO, best known as bleach), sodium hydroxide (NaOHNaOH - caustic soda) and some lesser-known chlorine compounds. Many are rather dangerous, and I don't think we would have survived as a lifeform if a bit of salt on our food turned into bleach (which destroys DNA) after a Perrier chaser.

    3Thank You

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    • Posted by Shubham Saxena ???? 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Prashant Tiwari 5 years, 3 months ago

    Atp is build in humans after breaking of co2 (6 molecule) into energy + co2 + h2o and after that process energy + other sources given from blood such as phosphate , calcium and other mineral mix together and store in mitochondria as aform of atp

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    • Posted by Riya Yadav 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 4 answers

    Dhanraj Sath 5 years, 3 months ago

    What is condom

    0Thank You

    Akhya Sahay 5 years, 3 months ago

    Movements of goods in all the countries of tge world

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    Prashant Tiwari 5 years, 3 months ago

    Globalization refers to a trade in one country to other

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    Meghna Thapar 5 years, 3 months ago

    Globalization means the speedup of movements and exchanges (of human beings, goods, and services, capital, technologies or cultural practices) all over the planet. One of the effects of globalization is that it promotes and increases interactions between different regions and populations around the globe. Globalization is the word used to describe the growing interdependence of the world's economies, cultures, and populations, brought about by cross-border trade in goods and services, technology, and flows of investment, people, and information.

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    • Posted by Siva Nesan 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 5 answers

    Akshika Agrvanshi 5 years, 3 months ago

    Ohm

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    Prashant Tiwari 5 years, 3 months ago

    Ohm / m2

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    Yogita Ingle 5 years, 3 months ago

    Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. The SI unit of resistivity is Ohm.meter. Resistivity increases linearly with temperature. 

    0Thank You

    Ekta Singh 5 years, 3 months ago

    Ohm meter

    1Thank You

    Siva Nesan 5 years, 3 months ago

    Joule

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    • Posted by Taniya 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 5 answers

    Akhya Sahay 5 years, 3 months ago

    S chand

    1Thank You

    Prashant Tiwari 5 years, 3 months ago

    NCERT, xamidea , s chand

    1Thank You

    सरिफ विद्यार्थी 5 years, 3 months ago

    S Chand

    1Thank You

    Mohammed_ Umar 5 years, 3 months ago

    Xamidea

    1Thank You

    Om Pandey 5 years, 3 months ago

    S chand

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    • Posted by Pragna Pragna 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Meghna Thapar 5 years, 3 months ago

    Factors that lead to speciation include genetic drift, natural selection, geographical isolation, mutation. Geographical isolation is not a major factor in the speciation of a self-pollinating plant species as pollination occurs between the reproductive organs of the same flower. No, geographical isolation is not a major factor in the formation of new species of self-pollinated plants. This is because self-pollinated plants receive pollen grains from the same flower or another flower on the same plant and its distance from other plants hardly affects its reproduction.

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    • Posted by Niharika Raj 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Niharika Raj 5 years, 3 months ago

    Thanks but I want point wise answer

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    Meghna Thapar 5 years, 3 months ago

    Genetic variationis advantageous to a population because it enables some individuals to adapt to the environment while maintaining the survival of the population. Genetic variation creates a larger pool of traits in a species so that given a novel environment, at least someone would have the trait needed to survive. Variation allows some individuals within a population to adapt to the changing environment. Because natural selection acts directly only on phenotypes, more genetic variation within a population usually enables more phenotypic variation.

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    • Posted by Shubham Saxena ???? 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Shubham Saxena ???? 5 years, 3 months ago

    Thanks

    0Thank You

    Meghna Thapar 5 years, 3 months ago

    The process of photosynthesis takes place in the green leaves of a plant. The carbon dioxide gas required for making food is taken by the plant leaves from the air which enters the leaves through tiny pores called stomata. Water required for making food is taken from the soil which is transported to the leaves from the soil through the roots and the stem. The sunlight provides energy required to carry out the chemical reactions involved in the preparation of food. The green pigment called chlorophyll absorbs sunlight energy.

    The photosynthesis takes place in three steps:
    (i) Absorption of sunlight energy by chlorophyll.
    (ii) Conversion of light energy into chemical energy and splitting of water into hydrogen and oxygen by light energy.
    (iii) Reduction of carbon dioxide by hydrogen to form carbohydrates like glucose by utilising the chemical energy.

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    • Posted by Akash Kumar 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 0 answers
    ANSWER

    • Posted by Charu Gupta 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Yogita Ingle 5 years, 3 months ago

    A chemical equation gives a lot of information viz.,

    1. It tells the names of the reactants and products.
    2. It tells the relative number of molecules of reactants and products.
    3. It tells the relative number of moles of reactants and the products.
    4. It tells the relative weights of reactants and the products.
    5. It tells the relative volumes of reacting gases and those of products formed in case of gaseous reactants. For example, the chemical equation.

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    • Posted by Adarsh Awasthi 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Adarsh Awasthi 5 years, 3 months ago

    ??Thanks

    0Thank You

    Sona Choudhary 5 years, 3 months ago

    The halogens (/ˈhælədʒən, ˈheɪ-, -loʊ-, -ˌdʒɛn/[1][2][3]) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117, tennessine (Ts), may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17. Halogens Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson chalcogens ← → noble gases IUPAC group number 17 Name by element fluorine group Trivial name halogens CAS group number (US, pattern A-B-A) VIIA old IUPAC number (Europe, pattern A-B) VIIB ↓ Period 2 Image: Liquid fluorine at cryogenic temperatures Fluorine (F) 9 Halogen 3 Image: Chlorine gas Chlorine (Cl) 17 Halogen 4 Image: Liquid bromine Bromine (Br) 35 Halogen 5 Image: Iodine crystal Iodine (I) 53 Halogen 6 Astatine (At) 85 Halogen 7 Tennessine (Ts) 117 Halogen Legend primordial element element from decay Atomic number color: black=solid, green=liquid, red=gas vte The name "halogen" means "salt-producing". When halogens react with metals, they produce a wide range of salts, including calcium fluoride, sodium chloride (common table salt), silver bromide and potassium iodide. The group of halogens is the only periodic table group that contains elements in three of the main states of matter at standard temperature and pressure. All of the halogens form acids when bonded to hydrogen. Most halogens are typically produced from minerals or salts. The middle halogens—chlorine, bromine, and iodine—are often used as disinfectants. Organobromides are the most important class of flame retardants, while elemental halogens are dangerous and can be lethally toxic

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    • Posted by T Neeraj 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Satyam Lodhi Rajput 5 years, 3 months ago

    Used in making chalks

    2Thank You

    Yogita Ingle 5 years, 3 months ago

    Plaster of Paris is prepared by heating gypsum at 373 K. On heating, it loses water molecules and becomes calcium sulphate hemihydrate (CaSO4.1/2 H2O) which is called Plaster of Paris.

     

    Plaster of Paris is used in hospitals for setting fractured bones in the right position to ensure correct healing.

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    • Posted by Mohd. Faiz 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Yogita Ingle 5 years, 3 months ago

    In females, only one egg is released from a single ovary every month. Every month, the uterus prepares itself to receive the embryo in case fertilization occurs. But if fertilization fails to occur, the uterine wall is breaks, so that it can be prepared for the ovary which will be released in the following month. Hence, to discard the unwanted uterine endometrial lining and the egg which is not fertilized, menstruation occurs in human females in a cycle of 28 days.

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    • Posted by Harsh Rathour 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Yogita Ingle 5 years, 3 months ago

    In the human being, the chromosomal mechanism of *** determination is of XX-XY type. In human the nucleus of each cell contains 46 chromosomes or 23 pairs of chromosomes of body characters) and 1 pair is of *** chromosomes (responsible for determination of ***).

    1. In the female, two homomorphic *** chromosomes are XX.

    2. In the male, two heteromorphic *** chromosomes are XY. 

    3. The genotypes of female and male is

    Female : 46 Chromosomes = 44 Autosomes + XX *** chromosomes

    Male : 46 Chromosomes = 44 Autosomes + XY *** chromosomes

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    • Posted by Utkarsh Sharma 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 3 answers

    Farooq Ganderbali 5 years, 3 months ago

    a liquid present in r eye

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    Palak ? 5 years, 3 months ago

    Concentrated hydrochloric acid and sulphuric acid

    0Thank You

    Palak ? 5 years, 3 months ago

    It is a mixture of

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    • Posted by Taniya 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Satyam Lodhi Rajput 5 years, 3 months ago

    ,scattering of light through a collidal solution

    1Thank You

    Kamna Tiwary 5 years, 3 months ago

    When the light gets scattered by the colloidal particles due to which the path of light ray becomes visible.

    1Thank You

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    • Posted by Shipra Mishra 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 3 answers

    Satyam Lodhi Rajput 5 years, 3 months ago

    Increase in nuclear charge

    2Thank You

    Abinash Dahal 5 years, 3 months ago

    Aqueous solutions of an acid conduct electricity Because there is concentration of H+ ions and the movement of this ions helps for the flow of electrical current through the solution Hence it conduct electricity..

    3Thank You

    Abhinav Singh 5 years, 3 months ago

    Acids undergo dissociation in aqueous solution to form H+ ions. When electricity is passed through an aqueous solution of an acid, the H+ ions reach the cathode and each H+ ion picks up one electron from the cathode to form H2 gas. Because of this reaction, an aqueous solution of acid conducts electricity.

    5Thank You

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    • Posted by Shubham Saxena ???? 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Shubham Saxena ???? 5 years, 3 months ago

    Thanks

    0Thank You

    Yogita Ingle 5 years, 3 months ago

    The process of photosynthesis occurs in two stages:

    Light-dependent reaction or light reaction:

    • Photosynthesis begins with the light reaction which is carried out only during the day in the presence of sunlight. In plants, the light-dependent reaction takes place in the thylakoid membranes of chloroplasts.
    • The Grana, membrane-bound sacs like structures present inside the thylakoid functions by gathering light and is called photosystems.
    • These photosystems have large complexes of pigment and proteins molecules present within the plant cells, which play the primary role during the process of light reactions of photosynthesis.

    The chemical equation in the light reaction of photosynthesis can be reduced to:

    2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATP

     

    Light independent reaction or dark reaction

    • Dark reaction is also called carbon-fixing reaction.
    • It is a light-independent process in which sugar molecules are formed from the water and carbon dioxide molecules.
    • The dark reaction occurs in the stroma of the chloroplast where they utilize the NADPH and ATP products of the light reaction.
    • 3CO2 + 6 NADPH + 5H2O + 9ATP → G3P + 2H+ + 6 NADP+ + 9 ADP + 8 Pi

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    • Posted by Roushan Kumar 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 1 answers

    Meghna Thapar 5 years, 1 month ago

    During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Photosynthesis is the process plants and some algae use to convert light energy to chemical energy stored as sugar within chloroplasts -- the energy factories found in plant cells. ... Chloroplasts are full of chlorophyll, a green pigment key to photosynthesis, which helps the plant absorb light.

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