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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.
| 56451. |
Blueprint of science |
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Answer» Science 2018 – NewUnit\tTitle\tWeightage1\tChemical Substances-Nature and Behaviour 25M2\tWorld of Living 23M3\tNatural Phenomena\t12M4\tEffects of Current\t13M5\tNatural Resources\t07MTotal Marks 80MInternal Assessment 80MGrand Total ?M Ouestion kya hi bai |
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| 56452. |
Why element carbon forms a very large number of compounds |
| Answer» Carbon has some really unique properties which help to form such a large number of compounds....\tCatenation- It is the ability of carbon compounds to form long chains, branched chains or rings.\tSmaller nucleus helps it to attract more number of electrons.\tTetravalency- It has got 4 valence electrons..( actually even silicon, lead and all of group 18 elements are tetra valent but carbon is the one with the above properties as well, which give it an edge over the other elements). | |
| 56453. |
Why electromagnetive wave does not require medium to travel how the travelled |
| Answer» Electromagnetic waves do not require a medium to travel through. This means that these waves can travel through solids, liquids, gases, and even space, which is a vacuum and has no matter. Electromagnetic waves include all the different types of waves on the electromagnetic spectrum, such as gamma rays, x-rays, ultraviolet waves, and even visible light.The reason why electromagnetic waves can travel through space is that they naturally keep themselves going. As denoted by the name, electromagnetic waves are both electric fields as well as magnetic fields. Literally, an electromagnetic wave is two waves that are traveling at 90 degrees or a right angle to each other. They are both oscillating together. | |
| 56454. |
What is mean by virtual image , erect image , magnified, diminished , lateral inverted, |
| Answer» Virtual Image: Image which is formed behind the mirror and cannot be obtained on a screen is called virtual image.Erect image : An erect image is an image in which, the up-down reversal is not occurred. That is, the image will be standing like the object.Magnification is the increase in the image size produced by spherical mirrors\xa0Lateral inversion: The phenomenon due to which left-hand side of an object appears as right-hand side of the object and vice versa is called lateral inversion. | |
| 56455. |
Tungsten is used in making filament of bulb give reason |
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Answer» It is because tungsten has a very high melting point (3380 degree celsius) Tungsten is used because it has high melting point The filament of a bulb reaches a very high temperature and tungsten has a very high melting point . Therefore tungsten is used in making filament of bulb |
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| 56456. |
Explain the working of electric motor and genrater |
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| 56457. |
Chemical compounds |
| Answer» What is your question | |
| 56458. |
What is dilequescent |
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Answer» Deliquescent are the salts which shows the property of deliquesce that is absorbing moisture from air and become moist. I don\'t know |
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| 56459. |
What is chain reaction? |
| Answer» A chain reaction refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats. The process may be controlled (nuclear power) or uncontrolled (nuclear weapons). | |
| 56460. |
What is the function of koh |
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| 56461. |
In night twinkiling are smalls |
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| 56462. |
Why stars are twinkling and planets not |
| Answer» Bcoz stars have their own light but planets donot have their own light they reflect the light which was received by the sun rays | |
| 56463. |
Defind solar cell |
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Answer» A device which convert solar power into electric energy a device is converting the solar radiation into electricity. |
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| 56464. |
What is amphotheoric oxide |
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Answer» Amphoteric oxides are the oxides which shows both acidic and basic nature by reacting with both acids and bases. It includes Al2O3 and ZnO.......Acidic nature of ZnO... ZnO +2HCl ---> ZnCl2+H2O.. Basic nature of ZnO .. ZnO + 2 NaOH --> Na2ZnO2+ H2O . Such metal oxides which react with both acid as well as acid to produce salts and water are known as amphotheric oxide. It is a metallic oxide.ti shows the both acidic as well as basic characters. In the strong acidic characters it show basic and in the strong basic characters it shows acidic.Eg:-) al2o3 and cacl2+h2o an amphoteric compound is a molecule or ion that can react both as an acid as well as a base It has both acidic and basic nature like -PbO,ZNO |
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| 56465. |
Why fragmentation cannot take place in higher multicellular organisms |
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| 56466. |
What is meant by amphoteric oxide? |
| Answer» An amphoteric compound is a molecule or ion that can react both as an acid as well as a base. | |
| 56467. |
Why plant reduce gum |
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Answer» Yes , it is a way to remove waste material out the plant body. To remove waste from their body |
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| 56468. |
What is meant by gravitation |
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Answer» A type of force attracted by the earth In physics...gravitation...is the force by which two objects attract each other because they have mass ... |
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| 56469. |
Double circulating blood |
| Answer» The movement of blood through the vessels of the body that is induced by the pumping action of heart and serves to distribute nutrients and oxygen to and remove waste products from all parts of the body..... | |
| 56470. |
Why absecic acid is stress hormone |
| Answer» Abscisic acid is called stress hormones as it induces various responses in plants against stress conditions. It increases the tolerance of plants toward various stresses. It induces the closure of the stomata during water stress. It promotes seed dormancy and ensures seed germination during favourable conditions. | |
| 56471. |
fe+O2+h2o |
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Answer» Fe2O3+H2 Fe2o3 |
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| 56472. |
what is meant by lateral displacement of light |
| Answer» Lateral displacement is the mechanism in which light changes its path when it travells from one medium to the another.If the second medium is thicker/denser from the first one then the light moves towards the normal and if the second medium is lighter/rarer than the first medium then the light ray move away from normal. | |
| 56473. |
Chapter 12 ma important kya ha |
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Answer» Nurmercal based on series and parallel combination Science Which Subject?? |
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| 56474. |
Difune electiric current |
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Answer» The flow of charge in conductor is called electric current Rate if flow of carge is called electric current Bro simple ( rate of flow of charge is called current or electric current), Rate of flowing of electric charge is called electric current .. and u are right bhumika Rate of flow of electric charge |
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| 56475. |
What is thermic reaction ? |
| Answer» The process of igniting Aluminium and Ferric oxide is called thermite reaction. This is an exothermic reaction. Iron obtained in this process is in molten state.Fe₂O₃ (s) + Al (s) →Al₂O₃ + 2 Fe(l) + HeatThermite reaction used for the welding of rails (joining metals) called as thermite welding. | |
| 56476. |
How to solve online sample paper on this app. ...!? |
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| 56477. |
Which is more important acid or base |
| Answer» Both. ..because both are used in basic needs. ...soap which is a base...and lemon or other food items have citric or any other form of acid. ... | |
| 56478. |
What is precipitate and example |
| Answer» A precipitate is an unsoluble substance which is formed mostly during double dispalcement reaction. The reactions in precipitate is formed is called precipitation reaction. Example: Na2SO4 + BaCl2 = NaCl + BaSO4. | |
| 56479. |
State the property used in graphite that it used in making electrodes |
| Answer» Following property used in graphite:\tGraphite is a non metallic conductor of electricity so is cheap,insoluble in water,acids and bases.\tGraphite is non corrosive material Therefore utilised in making electrodes. | |
| 56480. |
Gyuzz we know the nomenclature of carbon molecules the can methene and methyne be formed |
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| 56481. |
How does amoeba engulf the food particles |
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Answer» Amoeba consumes food with the help of pseudopodia . Pseudopodia are temporary finger-like projections of the cell surface, which fuse over the food particle. This results in the formation of a food vacuole. Phagocytes Pseuopodia |
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| 56482. |
.nvf |
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| 56483. |
The respiratory organ the earthworm |
| Answer» Skin | |
| 56484. |
What is goiter |
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Answer» Goiter is a disease caused by deficiency of iodine Goiter is a disease caused by defesiency of iodine A type of disease which can be form by the lack of throxyin hormones in the throat |
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| 56485. |
Why the ponds and lakes not need to clean while an aquarium needs to clean regularly? |
| Answer» An aquarium is an artificial ecosystem and the organisms present in it are selective and maintained in a restricted environment. In the Aquarium the uneaten food as well as the waste generated by the fishes mixes with the water and is left untreated due to the lack of decomposers. The waste materials thus accumulate in the water making it toxic. Hence an aquarium has to be cleaned after regular intervals.\xa0On the other hand, a pond or a lake ecosystem is a natural ecosystem and the types of organism present in it is balanced. The waste produced in this ecosystem serves as the food material for the decomposers and is thus eliminated by them from the water. This ensures a balance in the water body and keeps the water clean and thus does not require physical cleaning.\xa0 | |
| 56486. |
Imp of respiration in day to day life |
| Answer» cellular respiration is important because it provides the energy for living organisms to perform all of the other necessary functions to maintain life. Most single-celled organisms, such as bacteria, do not require much energy and are able to survive on glycolysis and fermentation. | |
| 56487. |
Why do we need control abd coordination system? |
| Answer» Therefore, it is necessary that various organs of the body of an organism work together in a proper manner for proper functioning to a stimulus. In human beings nervous system and endocrine system work together to control and coordination. | |
| 56488. |
State the principal on which a fuse work |
| Answer» Principle- heat given off by electrical energy. If the current is a lot the fuse melt and break the circuit. | |
| 56489. |
An objects 2cm tall is placed in front of convex mir |
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| 56490. |
How do plant reproduction? explain in brief? |
| Answer» By the process of diffusion | |
| 56491. |
Show that gravitational potential at a point of distance r from the mass m is given by,V=-(GM/r) |
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| 56492. |
What is temporal lobe |
| Answer» It is the lobe present in fore brain. It detects the touch, taste, smell, etc. | |
| 56493. |
What are the two property of carbon |
| Answer» 1.Catination2.tetravalency | |
| 56494. |
Why does tHe star twinkle..? |
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Answer» Stars are the point source of light when refraction occurs the light of the star fluctuates and as it is a point source of light it does not accommodate with the refraction of atmosphere so it appears to twinkle. The twikling of a star is due to atmospheric refraction of starlight .The starlight when enters the earth\'s atmosphere it undergoes refaction. |
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| 56495. |
How can i learn hybridization |
| Answer» By searching , cbse notes on any search engines like Google | |
| 56496. |
What is water of crystallization ?some examples. |
| Answer» Crystallization is a natural process which occurs as materials solidify from a liquid, or as they precipitate out of a liquid or gas. This can be caused by a physical change, such as a temperature change, or a chemical change such as acidity. Crystallization is a process directed by the size and shapes of the molecules involved, and their chemical properties. Crystals can be formed out of a single species of atom, different species of ions, or even large molecules like proteins. Some large molecules have a harder time undergoing the crystallization process, because their internal chemistry is not very symmetrical or interacts with itself to avoid crystallization. | |
| 56497. |
What type of lens is used in Solar Furnace and why? |
| Answer» A concave mirror is used in solar furnace because it converges and concentrate the sunlight as it is a converging mirror.Que. is wrong replace lens with mirror because no lens is used for this purpose.? | |
| 56498. |
Uses of chlorine . |
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Answer» Also used in the manufacture of hcl and chloroform It kills bacteria. It is infectious. It is used to treat drinking water and swimming water. |
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| 56499. |
What are the changes observed in females in puberty |
| Answer» There breast size increases and elongate of bones. Hair grow in genetic areas. Menstruation began. | |
| 56500. |
What is pepsin and their function also? |
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Answer» Pepsin is a digestive enzyme which breaks protein & convert them into amino acid. Pepsin is a type of digestive enzyme.which helps to digest food in stomach by the help of HCl acid. |
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