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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.
| 43751. |
Define refuction |
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Answer» Fir b to nhi btaya A reaction in which a substance loses oxygen or gains hydrogen is called Reduction reaction. I know mene jaanbuj kr wrong likha hai |
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| 43752. |
What is residual air |
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| 43753. |
What are pyruvates |
| Answer» 3carbon compound +Energy,,,,,,, 2CHOOH³ | |
| 43754. |
What are the differences between respiration and breathing? |
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| Answer» | \tBreathing involves the process of inhaling and exhaling the air in and out of lungs. While breathing, oxygen is inhaled and carbon dioxide is exhaled.Respiration is the process of the breaking down the glucose to produce energy which is used by cells to carry out the cellular function.Breathing takes place in lungs.Respiration takes place in cells.Breathing is a physical voluntary process.Respiration is a chemical involuntary process.No energy is produced during the process.Energy is released in the form of ATP.It is an extracellular process, as it occurs outside cells.It is an intracellular process, as it occurs inside cells.No enzymes are used during the process.A large number of enzymes are used during the process.Breathing takes places through respiratory organs like lungs, nose, etc.Respiration takes place in cells and cell organelles like mitochondria, etc.\t Breathing is just inhaling and exhaling whereas respiration is the combination of glucose with Oxygen to give energy or we can say respiration as a process of breaking down of the food to give us energy | |
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| 43755. |
What is resistance and resistor |
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Answer» A resistor is an electric component with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc..\xa0Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it.\xa0 The obstruction or hinderance caused to the flow of current in a conductor that is known as resistance.The device which is used to provide resistance that devices are known as resistors. |
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| 43756. |
What are the conditions for making images by cancave mirror and canvex mirror |
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| 43757. |
Newton\'s 1,2,and 3 law of motion. Tell in short |
| Answer» \tNewton’s first law of motion states that “A body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it”.\tAccording to Newton’s second law of motion, the net force experienced by a body is directly proportional to the rate of change of momentum of the body.\tAccording to Newton’s third law of motion, for every action, there is an equal and opposite reaction. | |
| 43758. |
Chical formula of bleaching powder |
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Answer» Ca(ClO)₂ CaOcl2...calciumoxychloride |
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| 43759. |
Why do chips manufacturer flush back of chips with gas |
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Answer» Chips are flushed with nitrogen to prevent it from oxidation & rancidity ☺☺ The packet of chips are flushed with only nitrogen gas .This is because nitrogen is a antioxidant. It prevents the chips from being oxidised. If we flush the packets of chips with oxygen,then the chips react with oxygen and becomes rancid and the smell and taste of food change. Chips are flushed back of nitrogen gas to prevent it from rancidity To prevent from becoming rancid. |
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| 43760. |
Why do stars appear to be twinkling? |
| 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. | |
| 43761. |
What is the angle between incidence light ray and reflected light ray while reflection |
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| 43762. |
During which period of the day the stomata open and close |
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Answer» During transpiration the movement of potassium ions in and out of the guard cells causes the opening and closing of stomata. During day time when light falls on the leaves, the starch present in them absorbs the light. Due to this formation of malice acid takes place in the guard cells. The malice acid then dissociates to H+ ions and malate. The H+ ions move out of the guard cells and as a result K+ ions move inside the gaurd cells. Due to this the water potential in the guard cells decreases and water moves inside the guard cells causing them to swell up and become turgid which in turn causes the opening of stomata pores. At night K+ ions move out of them and water potential increases in the guard cells which causes water to move out of the cell and making them shrunk and closing the stomata pores. Stomata opens during night and closed during day. |
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| 43763. |
Is power inversely proportional to resistance and why |
| Answer» As we know electric power is the rate of utilising electricity by the electrical appiance.⇒Power = (Work) /(Time)⇒Electrical work done = vit, Where\xa0v = Voltage,i = electric currentt = time of elctricity consumption.But\xa0Power = Electric work done / TimePower = vit/tPower = vi,But according to Ohm\'s law, v = iR, where R = Resistance.⇒i = v/R⇒Power =\xa0v\xa0× (v/R)⇒Power =\xa0(v2\xa0) /\xa0RIf the voltage i.,e., Potential difference applied between the eneds of the electrical appliance⇒Power = Constant/R⇒Power ∝ 1/ (Resistance)⇒ power is inversely proportianal to resistance it the potential difference is a constant.\xa0 | |
| 43764. |
What is the meaning of antacid |
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Answer» Antacids are mild alkalides. There are used for getting relief from acidity and indigestion and sometimes even headache. When taken orally, it reacts with hy¬drochloric acid present in the stomach and reduces its strength by consuming some of it. Ex : Milk of Magnesia. Antacids are those bases which are used in antacid tablets to get relief from acidity |
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| 43765. |
I did not understand nutrition in human beings |
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| 43766. |
What wrong with the following chemical equations Mg. +. O. = Mgo |
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Answer» Firstly the oxygen is not in a molecular form and secondly the equation is not balanced. It shoul be like- 2Mg + O2 = 2MgO Not balanced Oxygen should be in molecular form |
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| 43767. |
Zinc formula |
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Answer» Zn^+2 Zn Zn? Zn Zn |
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| 43768. |
Its heavy raining |
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Answer» It is not what\'s up not fb you get it I luv rain?.... The dropping of rein drops into the bushes of trees have different feeling No . In kerala the rain is special For what... bathing... Yes iam in out Then go out...in rain... |
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| 43769. |
What do you About Indian Education System ? ,Comment below ? - |
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Answer» I love education and india much, but indian education system is not too bad or not too good for me Everybody hate This system I too ? Its worst..in india we cant opt those subjects individually in which we hv deep interest...!!!... How We can Improve our Educational System any Idea? ? Becoz they r not trying to undertand our intelligence but remebering capacity Very bad ......!!!!.......!!! |
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| 43770. |
What is 1 coloumb C |
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Answer» ??????????????????????????????? ......??... A coulomb is a unit of electric charge that is equal to the amount of charge accumulated in one second by a current of one ampere |
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| 43771. |
Similarities and difference between human beings and amoeba |
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Answer» Amoeba can also take nutriton,they can respirat like humans they can also do their life process like humans And diffrence is that they can\'t walk, talk like us. Human beings r multicellular organisms. Amoeba is unicellularAmoeba has pseudopodia.Humans hasnt.Amoeba engulf food.Human beings chew. |
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| 43772. |
What is double circuit circulation ? |
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| 43773. |
What happen to the colour of the leaf? What is the colour of the solution in starch? |
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| 43774. |
What is the function of liver and gallbladder |
| Answer» (i) The cells of liver secrete bile juice, which helps in emulsification of fats. It also makes the acidic food coming from the stomach alkaline thus, facilitating action of pancreatic enzymes.(ii) Gall bladder stores and concentrates the bile juice produced by the liver. | |
| 43775. |
What is a reducing agent and oxidation agent? |
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Answer» Reducing agent: : If a substance gains oxygen or loses hydrogen during a reaction, it is said to be oxidised and is called a reducing agent.\xa0Oxidising agent: : If a substance gains hydrogen or loses oxygen during a reaction, it is said to be reduced and is called an oxidising agent. Oxidising agent- the agents that supply oxygen to a substance by itself getting reduced..And reducing agent iska opposite hai. |
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| 43776. |
What is thermal decomposition |
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Answer» \tThermal decomposition reaction A thermal decomposition reaction can be defined as a decomposition reaction which is activated by thermal energy. The reaction is generally endothermic as energy is required to break chemical bond in order to separate the constituent elements.\texample of thermal decomposition reaction CaCO3 → CaO + CO2 When heated Calcium Carbonate,decomposes into Calcium Oxide and Carbon Dioxide. This process is employed in the manufacturing of quick lime which is an important component in industries.\t\t A decomposition reaction in which heat is ivloved during reaction |
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| 43777. |
arteries contain always oxygenated blood but pulmonary arteries contain deoxygenated blood why |
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| 43778. |
explain different modes of nutrition |
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Answer» Heterotrophic nutrition is the mode of nutrition in which organisms depend upon other organisms to survive. All animals and non green plants are heterotrophic.Heterotrophic organisms have to acquire and take in all the organic substances they need to survive.[1]All heterotrophs (except blood and gut parasites) have to convert solid food into soluble compounds capable of being absorbed (digestion).Then the soluble products of digestion for the organism are being broken down for the release of energy (respiration). All heterotrophs depend on autotrophs for their nutrition. Heterotrophic plants have only four types.The four main types of heterotrophic nutrition are:Holozoic nutrition: the word holozoic is made from two words- holo= whole and zoikos= animals and literally means animals which eat their food whole. Complex food is taken into a specialist digestive system and broken down into small pieces to be absorbed. This consists of 5 stages, ingestion, digestion, absorption, assimilation and egestion. E.g.: humanSaprobiontic/saprophytic nutrition: Organisms feed on dead organic remains of other organisms.Parasitic nutrition: Organisms obtain food from other living organisms (the host), with the host receiving no benefit from the parasite.When a parasite is present inside the body of the host, it is known as an endoparasite. These parasites suck and feed on the blood of the host. E.g.: tapewormsSymbiotic nutrition:Two organisms live in close association to benefit each other or one of the two benefits the other whilst it itself suffers neither loss but nor does it gain. E.g.: fungi and algae, rizobium and leguminous plants roots. Nutrition is of two types namely, autotrophic and heterotrophic mode of nutrition.Plants exhibit autotrophic mode of nutrition. They prepare their own food by the process of photosynthesis.Animals exhibit heterotrophic mode of nutrition. Heterotrophic mode of nutrition can be categorised into holozoic mode, parasitic mode and saprophytic modes of nutrition.*Holozoic mode of nutrition is the process in which an organism takes in whole food. The food ingested undergoes digestion, absorption and assimilation. e.g. small organisms like amoeba large organisms like human beings.*Parasitic mode of nutrition is the process in which organism derives its nourishment from host organisms either in liquid form or nutrient form. e.g. Taenia solium is the tape worm living in human intestine.*Saprophytic mode of nutrition is the process in which organism derives its nourishment from dead and decaying matter. e.g. Fungi are heterotrophs that acquire their nutrients from dead and decaying matter by absorption. |
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| 43779. |
Explain briefly why ammeter is used in series and voltmeter is used in parallel. |
| Answer» A voltmeter is used to measure the potential difference across two points in a circuit. Since, in parallel connection the voltage in the branches remains same, and also the resistance of the voltmeter is very high due to which a very small current flow through the voltmeter. So, it is connected in parallel to measure the voltage.An ammeter is used to measure the current flowing through a component/circuit. Since, current remains same in series connection and also the resistance of an ammeter is very small due to which it doesn’t affect the current to be measured. So, an ammeter is connected in series to measure current. | |
| 43780. |
Nitrogen form five compounds |
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| 43781. |
A2o3+2b-b2o3+2a,3cso4+2b-b2(so4)+3c,3co+2a-a2o3+3c which elementmost least reaction and type |
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| 43782. |
Tell the valencies of 1st 30 elements? |
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| 43783. |
how are fats digested in our bodies where does th.isprocesstakeplace ..in long way explain it?? |
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Answer» Read the text book line to line And ssrryy .. Please ask Google...if can\'t then tell me.. |
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| 43784. |
Describe the experiment to show that chlorophyll is necessary for photosynthesis? |
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Answer» Result of Iodine test:-Iodine is a purple colored reagent used to test the presence or absence of starch in the leaf conducted for photosynthesis process. In the presence of starch iodine solution will turn into blue-black color and in the absence of starch iodine added to leaf will turn into brown color.In this experimental leaf, the part of the variegated leaf which contain green patches will give a positive test for starch i.e. iodine when added to this part of the leaf will turn into blue-black color. The reason for this is, this part of the experimental leaf containing green patches include chlorophyll and thus prepare starch through photosynthesis. Thus iodine added to this region will turn into blue-back color. But colored patches of variegated leaf doesn\'t include chlorophyll and thus don\'t prepare starch through photosynthesis. So iodine added in this region will change into brown color. Thus this experiment proves chlorophyll is necessary for leaves to prepare starch through photosynthesis. Aim of the experiment:-To prove that chlorophyll pigment in green leaves is necessary for the plants to prepare their carbohydrate (starch) food.Requirements for the experiment:-A well watered variegated leaf plant, beaker, water, Bunsen burner, mentholated spirit or rectified spirit or ethanol, iodine solution, a white porcelain tile. Procedure for the experiments:-A variegated leaf plant is taken for this particular experiment to prove the necessity of chlorophyll for photosynthesis. A variegated leaf is a leaf in which different patches of colors are present in a Croton or Coleus or Geranium plant. The place where green patches are present in the leaf, chlorophyll pigment is present while at the other color patches present in the leaf contain other pigments but not chlorophyll. Before starting the experiment to prove chlorophyll is necessary for photosynthesis an important step has to be carried out is known as De-starching. De-starching is a step in which the starch present in the leaves of the plant will be removed by keeping the variegated leaves plant in a dark room or closed cup-board for about 48 hours. This step is done to ensure that previously synthesized starch in the leaves get consumed up because photosynthesis doesn\'t occur at that time as the plant is kept in dark place.After De-starching step the variegated leaf plant is kept in bright sunlight for about 6 hours. After this one of the variegated leaf is plucked out from the experimental plant. Then Iodine test is conducted for this experimental leaf to find out whether the leaf prepared starch through photosynthesis or not.A variegated leaf plant taken to prove chlorophyll is necessary for photosynthesis Courtesy:-www.larapedia.comSteps to be followed for Iodine test:-The plucked out experimental leaf is immersed in boiling water in the beaker for few minutes so that the cells of the leaf will be killed and at the same time metabolic activities of the leaf cells will be stopped.Now the boiled leaf is taken out from the beaker with the help of a forceps. It is then placed in a test tube containing rectified spirit or ethanol. Then the leaf is boiled in ethanol over a water bath by keeping it in boiling water for about 10 minutes. The leaf dissolves its chlorophyll by boiling it in rectified spirit and then become pale-white.Next the pale-white leaf is removed from the test tube by forceps and then it is washed in under warm water to make it soft.Then this leaf is spread over a white porcelain tile and iodine drops were placed over at different parts of the leaf. |
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| 43785. |
Why hot Water freeze faster than cold water??? |
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Answer» Bhai kaha se copy kr dalaKade sadda maththa bhi use kr liya krOk thanks The Mpemba effect is the observation that warm water freezes more quickly than cold water. The effect has been measured on many occasions with many explanations put forward. One idea is that warm containers make better thermal contact with a refrigerator and so conduct heat more efficiently. Hence the faster freezing. Another is that warm water evaporates rapidly and since this is an endothermic process, it cools the water making it freeze more quickly.None of these explanations are entirely convincing, which is why the true explanation is still up for grabs.Today Xi Zhang at the Nanyang Technological University in Singapore and a few pals provide one. These guys say that the Mpemba paradox is the result of the unique properties of the different bonds that hold water together.What’s so odd about the bonds in water? A single water molecule consists of a relatively large oxygen atom joined to two smaller hydrogen atoms by standard covalent bonds.But put water molecules together and hydrogen bonds also begin to play an important role. These occur when a hydrogen in one molecule comes close the oxygen in another and bonds to it.Hydrogen bonds are weaker than covalent bonds but stronger than the van der Waals forces that geckos use to climb walls.Chemists have long known that they are important. For example, water’s boiling point is much higher than other liquids of similar molecules because hydrogen bonds hold it together.But in recent years, chemists have become increasingly aware of more subtle roles that hydrogen bonds can play. For example, water molecules inside narrow capillaries form into chains held together by hydrogen bonds. This plays an important role in trees and plants where water evaporation across a leaf membrane effectively pulls a chain of water molecules up from the roots.Now Xi and co say hydrogen bonds also explain the Mpemba effect. Their key idea is that hydrogen bonds bring water molecules into close contact and when this happens the natural repulsion between the molecules causes the covalent O-H bonds to stretch and store energy. Then there is the strange Mpemba effect, named after a Tanzanian student who discovered that a hot ice cream mix freezes faster than a cold mix in cookery classes in the early 1960s. ... Another is that warm water evaporates rapidly and since this is an endothermic process, it cools the water making it freeze |
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| 43786. |
Why does light reflect |
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| 43787. |
What is melting point of tungsten? |
| Answer» 3,422°C | |
| 43788. |
From which part of the plant cotton and jute are obtained |
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Answer» Cotton is obtained from fruits of cotton plant and jute is obtained from stem of the jute plant. Cotton=flower |
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| 43789. |
How to score good marks in science board exam |
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Answer» Follow school notes and teacher\'s instructions Go through yur ncert, clear yur concepts...... |
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| 43790. |
Name spores produced by ameoba |
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| 43791. |
1. What is the difference between electric potential and potential difference? |
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Answer» Potential difference is the difference in electric potential energy between two points. It is the amount of work done in moving a unit positive charge from one point to another point in an electric field. This is measured in volt.\xa0An electric potential at a point in an electric field is the work done by the electric field in moving a unit positive charge from infinity to that point.\xa0This is also measured in volt.\xa0 Oo yes Dhama ...Sirf apko he nhi Kabbir ...,etc...sb ko .. electric potential is the potential energy of a unit charge in any electric field. where as electric potential difference is the difference of electric potentials of two different points. it is equal to work done in carrying a unit positive charge from infinity to any point. |
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| 43792. |
why is nutrition considereed asorganic compound bio class 10 |
| Answer» The nutrients that contain carbon in their structural makeup are referred to as organic nutrients, whereas those that do not contain carbon are called inorganic nutrients. Therefore, the organic nutrients are carbohydrates, lipids, proteins and vitamins. These nutrients are important for energy......Or .. you may go to Wikipedia for detailed answer....? | |
| 43793. |
What is biodigrbl |
| Answer» Those resources which can be degrigated after some time when they can be putted in earths surface due to some bacterias,fungus. | |
| 43794. |
Explanation about digestive system for class 10th |
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Answer» Structures And Functions Of The Human Digestive SystemThe digestive tract begins at the lips and ends at the ****. It consists of the mouth, or oral cavity, with its teeth, for grinding the food, and its tongue, which serves to knead food and mix it with saliva; the throat, or pharynx; the esophagus; the stomach; the small intestine, consisting of the duodenum, the jejunum, and the ileum; and the large intestine, consisting of the cecum, a closed-end sac connecting with the ileum, the ascending colon, the transverse colon, the descending colon, and the sigmoid colon, which terminates in the rectum. Glands contributing digestive juices include the salivary glands, the gastric glands in the stomach lining, the pancreas, and the liver and its adjuncts—the gallbladder and bile ducts. All of these organs and glands contribute to the physical and chemical breaking down of ingested food and to the eventual elimination of nondigestible wastes. Human digestive systemThe human digestive system as seen from the front. |
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| 43795. |
Ionic table of atoms |
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| 43796. |
I want answers for ncert activities in chapter2 |
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| 43797. |
What is cropes |
| Answer» A cultivated plant that is grown on a large scale commercially, especially a cereal, fruit, or vegetable. | |
| 43798. |
Respiration is occure in day time as well as night time |
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| 43799. |
how to study science book for board exam |
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| 43800. |
why pulmonary arteries contain deoxygenated blood |
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Answer» Pulmonary artery arises from right ventricle of heart. Right ventricle in turn receives blood from right atrium. Right atrium receives deoxygenated blood from all over the body through superior vena cava, inferior vena cava and coronary sinus.So, pulmonary artery receives deoxygenated blood from right side of heart. This is nature\'s design that this blood enters lungs for unloading of carbondioxide and subsequent loading of oxygen can take place. In humans, it is necessary to keep oxygenated and deoxygenated bloods separate .For this very reason, oxygenated blood is carried by pulmonary veins to other body parts and deoxygenated blood is carried by pulmonary arteries to the lung and is pumped by heart.??? |
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