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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
what is the scientific name butterfly |
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Answer» Rhopalocera Rhopalocera The scientific name of butterfly is Rhopalocera. |
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| 802. |
Why we always add acid in water dropwise with continuous stirring? |
| Answer» If we add water in acid or base it may sometimes splash out and causes burns because it is highly exothermic. So to avoid this we add acid or base in water dropwise with constant stirring. | |
| 803. |
HAPPY INDEPENDENCE DAY ???????? |
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Answer» Same to you Happy independence day to you and your family ?????? Same to you ?????? Happy independence day Same to you |
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| 804. |
What is meant by inorganic substances |
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Answer» Which is in organic Inorganic compound or substrance are those compound in whinch they don t have carbon atom Inorganic substances are compounds that do not essentially have carbon atoms in the structure |
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| 805. |
Can anyone explain the concept of DNA copying?? |
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Answer» |
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| 806. |
How are spores produced in sorengium of rhizopus |
| Answer» Rhizopus is the species of a fungus. They reproduce asexually by the formation of the spores. The body of the fungus is composed of the hyphae which develop the sporangium. The sporangium is a swollen structure at the tip of the filaments bearing the spores. The spores are tough and resistant structures which are dispersed by the breaking of the sporangium. When the conditions are favourable, then these spores germinate and develop to form new fungal filaments. | |
| 807. |
DEPLETION OF OZONE LAYER ?? |
| Answer» Ozone layer is formed by the three atoms of oxygen (O3) which is also known as ozone gas that protects our Earth from the harmful Ultraviolet Rays. | |
| 808. |
Write the reaction of dil. HCI with the following a.KOH,b. Mg,c.CaCo3 |
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Answer» Hcl +caCo3--------co2 +H2o+caco3 HCl +Mg ------- mgcl+H² HCl + KOH ---------- kcl²+H²o |
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| 809. |
How is ozone formed in the upper layer of the atmosphere ? |
| Answer» Oxygen molecule splits into atomic oxygen (O) at higher levels of an atmosphere because of higher energy of UV radiations.So,\xa0O2\u200b⟶O+OO2\u200b+O⟶O3\u200b\xa0(Ozone)Damage to the ozone layer is a cause of concern to us as it forms a layer in the atmosphere which protects us from the harmful UV radiation.Damage to ozone layer can cause penetration of UV rays in the earth surface which damages human organs, plants, etc. | |
| 810. |
What is wbc |
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Answer» White blood cells White Blood Cells or Corpuscles which act as the protective wall of our internal body it act as the soldier of our body through which only when the viruses or bacteria enter when they crak this wall. WBC is use to fight with the viruses which came or entered in our body. White blood cells (Leucocytes)Leucocytes are the colourless blood cells. They are colourless because it is devoid of haemoglobin. They are further classified as granulocytes and agranulocytes. WBCs mainly contribute to immunity and defence mechanism White blood cells |
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| 811. |
Write the difference between broccoli and khol rabi |
| Answer» In its uncultivated form,\xa0Brassica oleracea\xa0is known as wild cabbage.\xa0The family includes cabbage, kale, collards, cauliflower, broccoli, kohlrabi, and brussels sprouts, each variety is chosen for certain traits like flower buds, large leaves, and edible stems. Artificial selection is a\xa0process in which humans consciously select for or against particular features in organisms.\xa0Artificial selection has enabled the cultivation of new crops with desirable traits from one single common ancestor. Furthermore, once a plant with the combination of alleles for a desired phenotype is produced, it can be propagated asexually by taking cuttings, grafting and encouraging runners or through layering. By artificial selection, man has produced many crop plants like broccoli, cabbage, cauliflower, kohlrabi etc. from a common wild cabbage species by selective breeding and artificial selection. | |
| 812. |
How do Voltmeter and Ammeter are connected in electric circuit? |
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Answer» Voltmeter in parallel and ammeter in series Ammeter is connected in series in a circuit whereas voltmeter is connected in parallel. VOTLMETER IS CONNECTED IN PARALLEL AND AMMETER IN SERIES |
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| 813. |
Calculate the number of electrons constituting 1 coulomb of charge. |
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Answer» 1e=1.6 ×10^8c 6*10 raise to power 18 electrons... Ans is the correct Gaurav seth We know that the charge on an electron is negative and it is -1.6⨯10-19\xa0coulomb.We need to calculate\xa0the number of electrons constituting one coulomb of charge.e = 1.6 × 10-19\xa0CTotal charge required for 1Coulomb.∴ q = 1C……….(1)The formula to calculate the charge isq = newhereq = chargee = number of electronsn = q/e……….(2)Substituting equation (1) in equation (2) we getn = 1/(1.6 × 10-19)n = 6.25\xa0× 1018\xa0electrons\xa0≅ 6\xa0× 1018\xa0electronsSo 1 Columb of charge contains\xa06\xa0× 1018\xa0electrons. |
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| 814. |
Name the muscle from which entry and exit of food regulated in food canal |
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Answer» Sphinchter muscles Sphinchter muscles Sphincter muscle |
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| 815. |
Where and which form carbohydratestore in animals |
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Answer» Because it was a good day with my dad is so much for the your muscle..... Carbohydrates, in animals is stored in the form of glycogen and it is mainly stored in liver and the muscles. |
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| 816. |
Give me all notes |
| Answer» My cbse guide have all notes in it | |
| 817. |
Plz give me a timetable for class 10. |
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Answer» Sumaila Ali, I am unable to find that khush kaur question box. I wanted a timetable for full day. 6:30 to 7:30 am maths |
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| 818. |
What is the formula of weak acid vinegar |
| Answer» The majority of acids are weak. On average, only about 1 percent of a weak acid solution dissociates in water in a 0.1 mol/L solution. Therefore, the concentration of H+\xa0ions in a weak acid solution is always less than the concentration of the undissociated species, HA. Examples of weak acids include acetic acid (CH3COOH), which is found in vinegar, and oxalic acid (H2C2O4), which is found in some vegetables. | |
| 819. |
Name the acid present in ant and its formula |
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Answer» HCOOH = methanoic acid Ignore HCOOH at the place it is CH2O2 It is formic acid. Formula=HCOOH The acid present in an ant is Methanoic acid and its formula is HCOOH. |
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| 820. |
Name the first discovered organic acid |
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Answer» Wrong ans Citric acid was discovered by an Islamic alchemist, Jabir Ibn Hayyan (also known as Geber), in the 8th century, and crystalline citric acid was first isolated from lemon juice in 1784 by the Swedish chemist Carl Wilhelm Scheele |
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| 821. |
Name the first discovered mineral acid |
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Answer» Mineral acids (those that do not contain carbon) are much stronger. They include sulfuric, nitric, and hydrochloric acids, all of which were described by Geber. In fact, he is credited with the discovery of sulfuric acid. To produce this chemical, he described heating what were called vitriols (certain sulfur-containing compounds) to a high temperature. This heating resulted in a chemical reaction that produced sulfur and an oxygen-containing gas as its byproducts. When the gas was cooled, it would condense with water vapor, forming a liquid that could dissolve metals. This liquid, which Geber called oil of vitriol, consisted of sulfuric acid (H2SO4) dissolved in water. Salman Khan |
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| 822. |
Name the weak acid present in the orange and lemon |
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Answer» Citric acid Citric acid. The acid present in leomon and orange is citric acid |
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| 823. |
What the acid present in guvava and graphes |
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Answer» Tartaric acid Tartaric acid |
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| 824. |
What is the use of sulpheric acid |
| Answer» It is formed through a natural process. When sulphide mineral in the rock oxidizes, sulphuric acid is formed. Sulphuric acid is strongly acidic. Therefore, it is used in cleaning of metals, removal of impurities from oil, manufacturing of chemicals – nitric acid, hydrochloric acid, synthesis of dye, drugs, detergents explosives etc. Below are the four important\xa0uses of sulphuric acid\xa0in various ways:\tSulphuric acid uses at home\tSulphuric acid uses in industry\tSulphuric acid uses drugs\tSulphuric acid on skin | |
| 825. |
Why metals show colour??? |
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Answer» Right Dear ur answer:-It is because the absorption and re-emission of light are dependent on wavelength. Gold and copper have low reflectivity at short wavelengths, and yellow and red are preferentially reflected, as the color here suggests. |
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| 826. |
Please give me time table for 10th board to get good percentge |
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Answer» Ur which year Can I tell Please give me time table for 10th board examination to get a excellent percentage |
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| 827. |
Important notes of chapter 11 in science |
| Answer» | |
| 828. |
How many aluminum atoms would combine with oxygen atoms to form aluminium oxide ? Explain? |
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Answer» 3 atom An aluminium atom (2,8, 3) loses 3 electrons to achieve noble gas configuration of neon gas and forms an aluminium cation (2,8) having three positive chargesAn oxygen atom (2,6) attains noble gas configuration of neon gas after accepting two electrons and forms an oxide anion with two negative charges. As the final compound is electrically neutral, the positive charges in aluminium oxide compound must be balanced by equal number of negative charges. This is possible when 2 aluminium cations (6* charge) combine with 3 oxide anions (6 charge).Thus, the ratio between aluminium cations and oxygen anions to form aluminium oxide is 2:3. This is indicated by the chemical formula 2Al3+ +302- -->Al203. |
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| 829. |
Why should magnesium ribbon be cleaned before burning in air ? |
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Answer» Because magnesium ribbon has a layer of magnesium carbonate It should be cleaned to remove the oxide layer formed on it\'s surface Magnesium ribbon should be cleaned with sandpaper before burning in the air because of the following reasons:\tMagnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.\tTo remove the\xa0Magnesium oxide layer from the ribbon which may prevent or slow down the burning of\tmagnesium ribbon.\tUnwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction. It should be cleaned before burning so that the magnesium oxide formed is free of dust |
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| 830. |
Why is respiration considerd an exothermic reaction ? Explain . |
| Answer» Respiration – The energy required by our body to stay active is provided by the food which we eat. During digestion, food particles are broken down into simpler substances. For example, wheat, rice, potatoes etc all contain carbohydrates. These carbohydrates are broken down into simpler substances called glucose. The glucose on combustion with oxygen gives CO2 gas, H2O and evolves heat. This reaction is called Respiration.C6H12O6 + 6O2 → 6CO2 + 6H2O + energyRespiration is a very special form of burning fuel. It involves the burning of sugar with oxygen within the cells of every living organism, to produce the energy needed for all the reactions of life along with water and carbon dioxide as waste products. Respiration is another exothermic reaction. | |
| 831. |
Does covex mirror shows lateral inversion? If not, then do the Ambulance word is laterally inverted? |
| Answer» Ambulance is usually in a hurry. In order to convey the vehicle in front that it is an ambulance, it is written laterally inverted. When the driver of the vehicle in front reads through the rear-view mirror, the Image of this inscription, through lateral inversion, form a right oriented image. | |
| 832. |
Which among the following metal is less reactive A. na,B. k,C. zn,D.fe |
| Answer» Iron (fe) | |
| 833. |
Herbivore : Goat : Omnivore : ?A) crowB) foxC) tigerD) cow |
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Answer» @Anshika Tyagi Crow wouldn\'t eat plants.... Crow Crow eat both plants and animals so it is a omnivore .And tigre is carnivorous, cow is a herbivore ............ By the way it\'s a very simple question ???....... The animals that eat both plants and animals are called\xa0OMNIVORE.Herbivore : Goat : Omnivore : crow |
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| 834. |
Why do magnetic field lines not intersect each other ? |
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Answer» Thank you Yogita Thank you Anshika They don\'t intersect each other because if they intersect then the compass needle will show 2 different directions...Which is considered impossible.... The two magnetic field lines do not intersect each other because if they do it means at the point of intersecting the compass needle is showing two different directions which are not possible. |
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| 835. |
Snow rule |
| Answer» \xa0Snow rule states that if the current is flowing in an electric circuit from\xa0South to\xa0North directionand magnetic compass is placed\xa0Over the conducting wire, the needle of the compass deflects in the\xa0West direction\xa0The name of the rule is chosen so that to remeber the words :- S for South, N for north, O for over and W for West .These letters are typed in bold letters in above statement.\xa0Purpose of the rule is to find the direction of magnetic field produced by the current carrying conductor.\xa0When current is flowing in the direction of south to north, magnetic field lines are circling around the conductor and the magnetic field directionabove the coductor in the circular line is from east to west. Hence the field lines are such that as if a magnetic north pole is placed in the east. Hence the compass needle placed above the conductor shift towrads west. | |
| 836. |
Why small intestine in herbivores longer than carnivores |
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Answer» Because cellouse don\'t digest easily compared to flesh Small intestine in herbivores longer than carnivores because herbivores eats grass which contains a complex food material called cellulose which they cannot digest easily. So, herbivores has long small intestine And we take small intestine because it is ae site of complete digestion Because type of food.herbivores eat grass and grass is not easy to digest like meat flesh which is eaten by carnivores.simply meat is easy to digest than grass which contains cellulose |
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| 837. |
Wt is law of conservation of mass |
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Answer» LAW OF CONVERSATION MASS:It states that the mass can neither be created nor destroy and it can only be transffered from one matter to another..... It states that mass can nither be created noe be destroyed..... but it can be transferred from one matter to another...... Mas can neither be created nor be destroye it can be transferred into one form to another form Mass can neither be created nor be destroyed. It means the mass of atoms present in reactant side is equal to the mass of atoms present in product side. It states tht the mass can neither be created nor destroyed it can only be transferred to one matter to another |
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| 838. |
Who gave 1st idea that there are 2 types of charges? |
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Answer» Du fay`s Charges Who gave 1st idea that there are 2 types of |
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| 839. |
Why did calcium starts floating when added to water |
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Answer» Its molecules have more intercellular space than water Because calcium have less density then density of water Because calcium have less density then the density of water.? |
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| 840. |
Describe the allotropes of carbon |
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Answer» Diamond and graphite The phenomenon by which an element can exist in more than one physical state is called allotropy.\xa0The allotropes of carbon can be categorized into two:\tAmorphous Carbon Allotropes\tCrystalline Carbon AllotropesCarbon with atomic number 6 and represented by the symbol\xa0‘C’\xa0in the periodic table is one of the most influential elements we see around us. Carbon is one of the elements which shows allotropy. The allotropes of carbon can be either amorphous or crystalline (Diamond, Graphite). |
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| 841. |
Calculate the equivalent resistance between a point A and B of the circuit shown in figure |
| Answer» But where is the figure of the circuit? | |
| 842. |
Co2 is also released during heating of baking soda then why we use the baking powder to evolve co2 |
| Answer» The acid in baking power is in the form of salt so it won\'t react with baking soda until it liquid is not added | |
| 843. |
What is the difference between ph paper and universal indicator.? |
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Answer» pH paper is an indicator that changes according to the substance that it is dipped to, however a universal indicator is a liquid that is dropped into a substance and it makes the substance change according to the pH(acid or base) Both are same No difference Both the terms mean same.The pH paper is know with the other name I.e universal indicator. |
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| 844. |
Name an indicator which indicates the various levels of hydrogen ion concentration. |
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Answer» pH scale pH PH indicator |
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| 845. |
In water crystallization;water molecules are physically attached or chemicall |
| Answer» The water molecules are chemically attached. | |
| 846. |
Jnv |
| Answer» ?? | |
| 847. |
Key point of chapter acid base and salts |
| Answer» Download CBSE class 10th revision notes for Chapter 2 Acids Bases and Salts in PDF format for free. Download revision notes for Acids Bases and Salts class 10 Notes and score high in exams. These are the Acids Bases and Salts class 10 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.https://mycbseguide.com/blog/acids-bases-salts-class-10-notes-science/ | |
| 848. |
What is light?state its important characteristics |
| Answer» Light is a source of energy through which we can see things..by our eyes with the help of light | |
| 849. |
What is cgs unit of power of lens |
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Answer» Cm–¹... The\xa0unit of power of lens\xa0in\xa0C.G.S\xa0system is centimetres-1. Cm-1 Centimetres ki power -1 Centimetres-1 |
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| 850. |
Describe heart in 5 points |
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Answer» The heart performs the following important functions:\tThe primary function of the heart is to pump blood throughout the body.\tIt supplies oxygen and nutrients to the tissues and removes carbon dioxide and wastes from the blood.\tIt also helps to maintain adequate blood pressure throughout the body.The heart functions in the following ways:\tThe arteries receive oxygenated blood from the heart and supply it throughout the body. Whereas, the veins carry the deoxygenated blood from all the body parts to the heart for oxygenation.\tThe right atrium receives blood from the veins and pumps it to the right ventricle.\tThe right ventricle pumps the blood received from the right atrium to the lungs.\tThe left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.\tThe left ventricle pumps the oxygenated blood throughout the body. It pumps oxygenated blood and take deoxygeneted blood |
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