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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.
| 69651. |
what is power and describe their formula |
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Answer» The capacity to do work is termed as Energy. The Energy expended to do work in unit time is termed as Power. It is represented as\xa0P.Power Formula\xa0is articulated as,P= E/tP = W/tor,Where,The Energy Consumed to do work\xa0=\xa0EWork done =\xa0W\xa0Time taken=\xa0t\xa0 Formula=work/ time=displacement/time= force.displacement/timePower=velocity.force???? The amount of energy transfer or converted per unit time.Formula=work/time |
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| 69652. |
What is the role of our stomach |
| Answer» Hydrochloric acid plays a major role in the process of digestion. It creates a medium of gastric juice acidic so that the enzyme pepsin digests the protein and kills the bacteria present in them. Hydrochloric acid helps your body to break down, digest, and absorb nutrients such as protein. The hydrochloric acid found in the stomach facilitates the process of digestion by disintegrating complex large food molecules into simpler molecules. The acid activates the pepsinogen enzyme required to digest proteins.When there is no hydrochloric acid in the stomach, the iron absorption process is hindered as iron is essential in the solution for absorption. The stomach is prompted to produce acid when food is consumed for the production of the gastrin hormone. Hence, the acid lowers the pH level in the stomach, switching off the gastrin production which otherwise would lead to hypergastrinemia. | |
| 69653. |
How can we identify partly ionization and complete ionization ??? |
| Answer» Complete ionization :- means that the ions of a element or compound are completely lost in a solution and change into some other structures. Ex ; acid react with water to release h+ ions Partial ionization :- means that some ions of element or compound are lost in the solution. Ex | |
| 69654. |
☆Production of Plaster of Paris? |
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Answer» Gypsum is heated so water from it get evaporated and only some amount of water will be present so it becomes p.o.p On heating gypsum at 373 Kelvin, it losses water molecules and becomes calcium sulphate hemihydrate this is called plaster of Paris. Doctor used as plaster for supporting fractured bones in the right position .Plaster of paris is a white powder and on mixing with water, it changes to gypsum once again hard solid mass. Gypsum is heated upto 100 degree Celsius and water is added to it and it forms P.O.P. |
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| 69655. |
Explain the gypsum |
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Answer» Hello Gypsum is a compound we get this compound by the heat of plaster of Paris and 1 whole 1 upon 2 H2O it gives caso4 multiply 2 H2OThis is the formula of gypsum: CaSO4 .2H2O. Reaction is :CaSO4.1/2H2O+1 ---1/1 H2O ---------- CaSO4 . 2H2O Thanks? Gypsum is calcium sulphate dihydrate. The chemical formula of gypsum is CaSO ·2H O Plaster of Paris is prepared by heating gypsum to a temperature of 373K.When gypsum is heated to a temperature of 373k ,It loses three-Fourths of its water of crystallisation and forms Plaster of Paris. Properties 1)It is a white powder. 2)It has a very remarkable property of setting into a hard mass on wetting with water. P.O.P. should be stored in a moisture proof container. |
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| 69656. |
Activity 1.5 |
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Answer» Heating of ferrous sulphate What is the activity |
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| 69657. |
Make a investigatory project on chemical reaction and equation |
| Answer» | |
| 69658. |
Show how co2 is necessary for plants ?? |
| Answer» Aim:\xa0To show that carbon dioxide is necessary for photosynthesis\xa0Procedure:\tTake a plant with destarched leaves.\tInsert one of its leaves in a conical flask containing potassium hydroxide.\tLeave the plant in sunlight.\tAfter a few hours, test the particular leaf and some other leaf of the same plant for the presence of starch.Observation:\xa0The leaf which was inserted in the conical flask stains brown, and the other leaf which is exposed to sunlight turns blue-black.Inference:Potassium hydroxide in the flask absorbs carbon dioxide; thus, due to the absence of CO2, the leaf fails to produce starch which proves that carbon dioxide is necessary for photosynthesis. | |
| 69659. |
Define:- exothermic and exothermic reaction. Give example of each. |
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Answer» The type of reaction in which energy is evolved is called exothermic reaction. Example - respiration The type of reaction in which energy is supplied is called endothermic reaction. Example - Photosynthesis IT IS A REACTION IN WHICH HEAT IS RELEASED BY REACTANT EXAMPLES RESPIRATION REACTION Thank yogita Endothermic ReactionsThe endothermic process is a term that describes a reaction where the system absorbs the energy from its surrounding in the form of heat. Few examples of endothermic process is photosynthesis, evaporating liquids, melting ice, dry ice, alkanes cracking, thermal decomposition, ammonium chloride in water and much more.Exothermic ReactionsThe exothermic reaction is the opposite of an endothermic reaction. It releases energy by light or heat to its surrounding. Few examples are neutralization, burning a substance, reactions of fuels, deposition of dry ice, respiration, solution of sulfuric acid into water and much more. |
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| 69660. |
How is the small intestine designed to absorb digestive food??? |
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Answer» The inner walls of the small intestine contains millions of small projections, having finger like structure called villi that increases the inner surface space for the digestion of food ??? The inner surface of small intestine has million of tiny , finger like projection is called villi The presence of villi gives inner wall of the small intestine a very large surface area And the large inner surface area of small intestine helps in the rapid absorption of the digestive food The inner lining of the small intestine has numerous villi which increase the surface area for absorption. The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body. |
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| 69661. |
Why fish is not survive in warm water, but survive in cold water |
| Answer» Many, but not all, fish kills in the summer result from low concentrations of\xa0dissolved oxygen\xa0in the water. Fish, like all other complex life forms, need oxygen to survive. They get theirs in the form of oxygen gas dissolved in the water. That\'s why it\'s important to have an aeration device, a bubbler, in your home aquarium.Warm water holds less dissolved oxygen than cold water, so summer is the time when fish can have a hard time getting enough oxygen. Other organisms use oxygen, too, including the algae that grow in the summer and bacteria that degrade organic matter. During the day, the algae produce oxygen through photosynthesis, but at night, when photosynthesis stops, they and other organisms keep respiring, using up oxygen. | |
| 69662. |
Definition of reproduction |
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Answer» Reproduction is the process in which the offspring produces it\'s baby or new organism of the same species. The production of new organism from the existing organism of the same species is called reproduction.Reproduction is essential for the survival of species on this earth. The process of reproduction ensure continuity of life on earth. Reproduction give rise to more organism with the same basic characteristics as their parents.Types of ReproductionThere are two main methods of reproduction in living.\tasexual reproduction.\tSexual reproduction. |
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| 69663. |
What is the function of cytoplasm and mitrocondria during Respiration |
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Answer» There is no any function of cytoplasm in respiration Mitochondria\xa0have an important\xa0role\xa0in cellular\xa0respiration\xa0through the production of ATP, using chemical energy found in glucose and other nutrients.\xa0Mitochondria\xa0are also responsible for generating clusters of iron and sulfur, which are important cofactors of many enzymes. |
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| 69664. |
Note of chapter 2 in short |
| Answer» https://byjus.com/cbse-notes/cbse-class-10-science-notes-chapter-2-acids-bases-and-salts/ | |
| 69665. |
What is glycolysis ??? |
| Answer» Glycolysis is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH and water. The process takes place in the cytosol of the cell cytoplasm, in the presence or absence of oxygen.Glycolysis is the primary step of cellular respiration. In the absence of oxygen, the cells take small amounts of ATP through the process of\xa0fermentation. | |
| 69666. |
Explain the process of hemodialysis |
| Answer» In case of kidney failure, accumulation of poisonous wastes takes place in the kidneys, which can be fatal. In such cases, hemodialysis is employed. It is a method for removing waste products such as potassium and urea, as well as free water from the blood\xa0in case of\xa0renal failure.In hemodialysis, the patient\'s blood is pumped through the blood compartment of a dialyzer, exposing it to a semipermeable membrane. During this passage, the waste products from the blood pass into the dialysing fluid by diffusion. The purified blood is then returned via the circuit back to the body. Here, ultrafiltration occurs by increasing the hydrostatic pressure across the dialyzer membrane. This\xa0is done by applying a negative pressure to the dialysate compartment of the dialyzer. This pressure gradient causes water and dissolved solutes to move from blood to dialysate, and allows removal of several litres of excess fluid during a typical 3 to 5 hour treatment. This is similar to the function of kidney, but it is different since there is no reabsorption involved | |
| 69667. |
Function of pseudopodia |
| Answer» Pseudopods have two main functions: (1) locomotion and (2) capture of prey or engulfing of food. For instance, amoeba can crawl by extending the cytoplasm and the contraction of the filaments. The pseudopodbulge outward from the edge of the cell to pull in the entire organism as it goes forward. | |
| 69668. |
Explain heart in our body |
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Answer» Yar Yogita you are geneus,if you don\'t mind can you please tell your percentage of last year The heart is an organ that pumps blood throughout the body. Human circulatory system is responsible for the transport of materials inside the human body. The organs of the circulatory system are heart, arteries, veins and capillaries. It comprises four chambers:\tAtria (upper chambers)\tVentricles (lower chambers)Layers of heartThe wall of the heart is made up of three layers:\tEpicardium-\xa0This is a protective layer made of connective tissues.\tMyocardium-\xa0This layer forms the heart muscles.\tEndocardium-\xa0This is the innermost layer and protects the valves and the heart. |
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| 69669. |
What is different between *q* and *Q*? |
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Answer» No difference both are same but use Q as it is given in NCERT Both are same |
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| 69670. |
why water does not show acidic character as it has hydrogen |
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Answer» As per the latest definition of acid, the substance which ionises in aqueous solution is called acid... But water does not ionises into its constituents die to which it does not show acidic character. ..HOPE IT WAS HELPFUL FOR YOU BUDDY... acids do not show acidic behaviour in the absence of water because the dissociations of hydrogen ions form in acid occurs in the presence of water only it is the hydrogen ions that are responsible for the acidic behaviour |
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| 69671. |
How to study well ??? |
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Answer» Study daily Just sit at the time when ur mind is fresh and is able to concentrate on the studies.....Hope it will help u.........?? Study daily Just sit at the time when ur mind is fresh and is able to concentrate on the studies.....Hope it will help? u.........?? Icrease concentration and avoid all attractive things such as mobile.......? Study every subject daily Study seriously for half hour u will find topics interesting will sit for more ... |
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| 69672. |
What is an electric circuit ? Explain with the help of a diagram |
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Answer» Bhai diagram kese dikhaau??? The electric circuit is a closed loop in which electrical components form a network for flowing the electrons. It has a point of source such as a battery from where the electrons start to flow whereas the point where electrons leave the electrical circuit is called the return.A simple circuit consists of the power source, conductors, switch and load.\tCell or battery : It is the power source.\tLoad : A bulb that lights when the circuit is closed. It is also termed as the resistor.\tConductors (Wire): One end of the wire is connected the load to the power source and the other end of the wire connects the power source back to the load.\tSwitch: A switch can be used to open or close a circuit |
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| 69673. |
Questions of nutrition part |
| Answer» Question answer | |
| 69674. |
Measurements of electric current |
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Answer» H Electric Current is the rate of flow of electrons in a conductor. The SI Unit of electric current is the Ampere.The\xa0magnitude of electric current\xa0is measured in\xa0coulombs per second.\xa0The\xa0SI unit of electric current\xa0is Ampere and\xa0is denoted by the letter A. Ampere is defined as one coulomb of charge moving past a point in one second. If there are 6.241 x 1018\xa0electrons flowing through our frame in one second then the electrical current flowing through it is ‘One Ampere.’ Ampere and the instrument that is used is ammeter Answer please |
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| 69675. |
Explain light travel in straight in line with example |
| Answer» Life without light would have been pretty dull. Light travels at a speed of 186,000 miles per second.\xa0You must have observed that in your house that whenever a beam of light enters a dark room through a tiny hole in the window, the lightwave always travels in a straight line.Let us carry out a small activity to show that lightwave travels along a straight line. Take three CD’s and align them together. Align them in such a way that all the CD’s line in a straight line. Now take a candle and place it at the other end. Do make sure that the tip of the candle and the holes of the CD’s all lie in the straight line. Ensure that the height of the CD’s and the tip of the candle are same. Observe the flame of the candle. We are able to see the flame of the candle because the light wave travels through the holes and reaches our eye.Now if suppose we displace the center of the CD’s we observe that we are not able to see the flame of the candle. Why does that happen? This is because the light gets blocked. If the light could have the ability to take a curve and travel, we could have seen the lightwave. But since light travels in a straight line, we were unable to see the flame of the candle when the CD is displaced. This proves that light travels along a straight lineIn the above picture, we can clearly see that light coming through the holes in the window travel along a straight\xa0line | |
| 69676. |
What do you mean by double fertilization plants |
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Answer» Thanks Double fertilization : It occurs when one male nucleus fertilizes (fuses) with egg cell to form zygote cell and other male nucleus fuses (fertilizes) with two polar nuclei to cause triple fusion. As these two types of fertilizations take place at the same time in the ovule of the plant, it is known as double fertilization.After fertilization:(i) Ovary develops into fruit.(ii) Ovules develop into seeds. |
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| 69677. |
Is control and coordination chapter was deleted for board exam 2020- 2021 |
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Answer» Yes it had deleted for 2020-21 Yes Yes Yes Yes |
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| 69678. |
What is is molten liquid? |
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Answer» Molten liquid is the liquid which has been converted from solid into liquid form at high temperature (this liquid is denser than the liquid like watet kerosene) such molten liquids areIron moten form Means पिघला हुआ To get an object that was solid rock once turns into liquid |
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| 69679. |
What did mendel propose |
| Answer» Mendel proposed the law of inheritance of traits from the first generation to the next generation. Law of inheritance is made up of three laws: Law of segregation, law of independent assortment and law of dominance. | |
| 69680. |
Is rusting of iron double displacement of reaction? |
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Answer» No No it is not No yar When iron reacts with air, it forms iron oxide (rust)4Fe + 3O2\xa0→ 2Fe2O3In this reaction, oxygen is added to iron, thus, iron is oxidized. Here oxygen is oxidizing agent. No |
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| 69681. |
Name any app on which I can give free online test of each chapter |
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Answer» My cbse guide U can give online tests on this app... Byju and extra marks Except this app My CBSE Guide |
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| 69682. |
Guys don\'t ask silly question ❓ plz |
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Answer» No need to ask y this site is,for studies so we should ask the question s that are absolutely understandable by others Absolutely right Why |
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| 69683. |
Can a human be change through operation if a person is having coloure blindness? |
| Answer» No | |
| 69684. |
In magnetic effects of current which topics are get deleted |
| Answer» Considering the loss of classroom teaching time due to the Covid-19 pandemic and lockdown, CBSE reduced the syllabus of classes 9 to 12 with the help of suggestions from NCERT.The CBSE syllabus has been rationalized keeping intact the learning outcomes so that the core concepts of students can be retained.Deleted syllabus of CBSE Class 10 Science | |
| 69685. |
Decomposition electricity reaction example |
| Answer» \tAn electrolytic decomposition reaction is a type of decomposition reaction in which the activation energy for decomposition. Example of electrolytic decomposition reaction\tDissociation of water:2H2O→ 2H2\xa0+ O2\t\t | |
| 69686. |
Why do stars twinkling but not planets? |
| Answer» The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction occurs in a medium of gradually changing refractive index. Since the atmosphere bends starlight towards the normal, the apparent position of the star is slightly different from its actual position. The star appears slightly higher (above) than its actual position when viewed near the horizon.Further, this apparent position of the star is not stationary, but keeps on changing slightly, since the physical conditions of the earth’s atmosphere are not stationary. Since the stars are very distant, they are approximate point-sized sources of light. As the path of rays of light coming from the star goes on varying slightly, the apparent position of the star fluctuates and the amount of starlight entering the eye flickers i.e., the star sometimes appears brighter, and at some other time, fainter, which is the twinkling effect.The planets are much closer to the earth, and are thus seen as extended sources. If we consider a planet as a collection of a large number of point-sized sources of light, the total variation in the amount of light entering our eye from all the individual point-sized sources will average out to zero, thereby nullifying the twinkling effect. | |
| 69687. |
Explain photosynthesis and gas liberated at the end of the process |
| Answer» Photosynthesis definition states that the process exclusively takes place in the chloroplasts through photosynthetic pigments such as chlorophyll a, chlorophyll\xa0b, carotene and xanthophyll. All green plants and a few other autotrophic organisms utilize\xa0photosynthesis to synthesize nutrients by using carbon dioxide, water and sunlight. The by-product of the photosynthesis process is oxygen. | |
| 69688. |
First and second chaper ke notes? |
| Answer» 1st chapter is chemical reactions and equation and the notes of this chapter is the notes having many chemical equations. 2nd chapter is acid- base The notes of this chapter are the notes having defination and detailed information about the acids and bases and some common salts | |
| 69689. |
How rainbow form? |
| Answer» 3 processes are responsible for the formation of a rainbow ?1) dispersion2) total internal reflection3) refraction | |
| 69690. |
Life processs |
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Answer» Yes this is the chapter of class 10 biology Download revision notes for Life Processes class 10 Notes and score high in exams. These are the Life Processes 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.Click on the given link :https://mycbseguide.com/blog/life-processes-class-10-notes-science/#:~:text=CBSE%20Class%2010%20Science%20Revision,maintenance%20are%20called%20life%20process. |
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| 69691. |
What is precipitate and precipitation? |
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Answer» \tA precipitation reaction is a reaction in which an insoluble salt is formed. It is formed by the combination of two solutions that contain soluble salts.\tThe insoluble salt that emerges out from the solution is termed to be precipitate.\tFor example, the precipitate Silver Chloride is formed when Aqueous silver nitrate (AgNO3) is added to a solution containing potassium chloride (KCl). Precipitation : the process of formation of solid from a solution and precipitate: this solid which is formed is called precipitate.thank you ☺️ |
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| 69692. |
What is the means of abdomen |
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Answer» Belly the part of the body of a vertebrate containing the digestive and reproductive organs; the belly. Abdomen is present in stomach |
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| 69693. |
Fats are emulsifed by______? |
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Answer» Bile juice Lipids Bile salts |
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| 69694. |
Protein in the food digested by________? |
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Answer» Pepsin in stomach and then further digestion takes place in small intestine by trypsin Trypsin |
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| 69695. |
Oxygen liberated during photosynthesis by green plant comes from______? |
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Answer» Water By splitting the H2O in H2 and O2 The\xa0oxygen liberated during photosynthesis by green plants come from\xa0splitting (hydrolysis) of water molecule. |
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| 69696. |
Displacement reaction is which type of reaction ,exothermic or endothermic?? |
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Answer» Exothermic Exothermic Exothermic |
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| 69697. |
The first enzyme to mix with the food in the digestive system is________? |
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Answer» Salivary amylase Digestion process starts from the mouth where salivary glands are present. Salivary glands produces amlyoses .So amylase is the first enzyme to mix with food. The saliva secreted by the salivary glands in mouth contains this enzyme that breaks down starch. First enzyme that digests food in alimentary canal is amylase. Digestion of food starts in the mouth itself when salivary amylase hydrolyzes the starch in the ingested food particle. It is present in mouth and is secreted by salivary glands. It acts on starch. Saliva |
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| 69698. |
The food synthesised by the plant is stored as________? |
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Answer» The food synthesised by the plants is stored as starch. It is also called as amylum. The starch is the polymeric carbohydrate which consists of a large number of glucose units. starch Starch.?? Starch |
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| 69699. |
The gastric juice contains which acid? |
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Answer» HCl Hydrochloric acid Bile Hydrochloric acid ,mucus,pesinogen |
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| 69700. |
The fiirst enzyme to mix with the food in the digestive system? |
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Answer» Salivary Amylase Salivary amylase What is human What is xylem |
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