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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.
| 55251. |
Why abscisic acid called as stress hormone? |
| Answer» As it induces various responses in plant against stress conditions , it increases the tolerance of plant towards various stresses | |
| 55252. |
Who many types of fission. |
| Answer» There are two types of fission 1) binary fission 2) multiple fission | |
| 55253. |
What is the three chemical of sodium is make |
| Answer» | |
| 55254. |
What is centifiguration |
| Answer» Rotating any liquid which separate lower denser item upper side ex:separating cream from mik | |
| 55255. |
Virus is living or non living? |
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Answer» There is contradiction about it.Because it show molecular movement only when he attack on any other organism. When they didn\'t find any host they are nonliving but when they get any host they become living Living Both when it is in contact ofany body then it is living and when not then it is non living living |
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| 55256. |
Why all the variations not transferred to the next generation |
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Answer» Due to error in DNA copying variations occur I also want its answer Why all the variations not transferred to the next generation |
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| 55257. |
Newly formed DNA copies may not be identical at times.give reason |
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Answer» Because no bio chemical reactions are absolutely reliable Since copying of DNA is a chemical process and so errors may occur dueto which DNA copies are similar but not identical |
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| 55258. |
why the stars is twinkling but the planets not |
| Answer» It is so because stars are point sized sources and hence undergo appreciable change but planets which are extended sources do not undergo appreciable change. | |
| 55259. |
Name the reaction in which unsatured oil converted into satured fat |
| Answer» Addition reactionVegetable oil (unsaturated) +H2 -> fat or ghee (saturated) | |
| 55260. |
describe the factor on which resistivity of resistant depend. |
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Answer» .1) Length of the conductor Resistance is directly proportional to the length of conductor..2)Area of cross section of the conductor The resistance of a conductor is inversely proportional to the area of cross section..3)Nature of the material..4)Temperature The resistance of metal increase with rise in temperature. Resistance of a conductor directly depends upon Length of the wire LInversely depends upon Area of Cross section of the conductor 1/ANature of material used.Therefore, R=ρ L/ALength of the conductor is double, means you are stretching that given length to double it. As a result, the wire becomes thin due to stretching. So its area of cross section will be halved(Since the volume remains constant). So new resistance RN = ρ 2L/A/2 = 4. ρ.L/A =4RHence the new resistance will become 4 times. Length, area, nature of material , temp. Of conductor |
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| 55261. |
state ohms law give its experiment conclusions and difine resistant its unit and formula |
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Answer» It states that potential difference across the to end of the conductor is directly proportional to the current passing through it.V=IR. Where.,,,,, V is potential differenceI is current R is resistance Ohm\'s law_ it states that if the potentiality of any circuit increases thenthe current will also be increased. V=I. R |
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| 55262. |
define electric current give its formula and unit |
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Answer» Flow of charge per unit time is called electric current.ORRate of flow of charge is called electric current.Its unit is Ampere A or Cs^-1.Mathematically ; it is expressed as ; I =Q/t Electric current is flow of electrons. I=q/t. Ampere Dono |
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| 55263. |
Date sheet of 10 board exam 2018-19 |
| Answer» | |
| 55264. |
Which is the largest bone of our body |
| Answer» Femur (thigh bone) is the largest bone in human body. It is the single longest and strongest bone present in the thigh. Femur, which is also called as Thighbone. This bone forms Hip joint proximally and Knee joint distally. There are two Femur bone in a body. One at each thigh. | |
| 55265. |
What is cleaning action of soap? |
| Answer» \tSoaps are cleansing agents capable of reacting with water and dislodging the unwanted particles from clothes or skin.\t\xa0The molecules of soap are sodium or potassium salts of long chain carboxylic acids.\t A soap molecule has a tadpole-shaped structure.\t At one end (long non-polar end) of the soap molecule is a hydrocarbon chain which is insoluble in water but soluble in oil.\t At the other end (short polar end) of soap molecule, there is a carboxylate ion which is hydrophilic i.e. water soluble but insoluble in oil. | |
| 55266. |
Why magnetic field lines don\'t intersect each other ? |
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Answer» we all know that magnetic field lines are those type of lines which shows the direction in a magnet and we also know that if a point source to intersecting directions therefore there might be there must be two directions from that point which is not possible Because it is not possible to represent two direction at a single point Magnetic field lines don\'t intersect each other because if it overlappes then the compass will show two different reading which is not possible . So , no field lines intersect each other ...... Because if they will intersect the compass needle will point in 2 opp. Directions which is not possible |
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| 55267. |
What is ethanoic acid ? |
| Answer» Ethanoic acid (CH3COOH) belongs to the group of carboxylic acids and is commonly called as acetic acid. It is slightly heavier than water with a density of 1.05 g/cm3. After adding 5-8% of acetic acid in water it becomes vinegar and is mostly used as preservatives in pickles. Acetic acid is the common name for Ethanoic acid. | |
| 55268. |
Importance of double circulation. |
| Answer» Double circulation occurs in animals with four chambered heart. It helps to keep oxygenated blood separated from deoxygenated blood and produce a large amout of energy to maintain their life processes and to keep their body temperature constant. | |
| 55269. |
What is double circulation ? In brief. |
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Answer» In human beings, the blood goes through the heart twice during each cycle i.e. the blood passes through the human heart two times to supply once to the whole body. So, it is called Double Circulation of blood.The double circulation of blood includes:(i) Systematic Circulation(ii) Pulmonary CirculationSystematic Circulation: It supplies oxygenated blood from left auricle to left ventricle, thereby pumped to various body parts. The deoxygenated blood is collected from the various body organs by the veins to pour into vena cava and finally into the right atrium (auricle). Right atrium transfers the blood into the right ventricle.Pulmonary Circulation: The deoxygenated blood is pumped by the right ventricle into the lungs for oxygenation. The oxygenated blood is brought back to left atrium (auricle) of the human heart. From left atrium, the oxygenated blood is pushed into the left ventricle. The left ventricle pumps oxygenated blood into aorta for systematic circulation. A circulatory system in which the blood travels twice through the heart in one complete cycle of the body is called double circulation |
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| 55270. |
Is light move slower in water? |
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Answer» Yes Yet Yes |
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| 55271. |
Which physical property of elements was used by mendeleev for classification ? |
| Answer» Mendleev used the property of metals acc. To their rxn. With hydrogen and oxygen | |
| 55272. |
Define lymph . |
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Answer» Lymph is similar to plasma of blood but its colourless and cointain less proteins . It foows in vessels called lymphatic vessels Lymph is a vessels found in lymphatic tissue it works as similar as of blood vessels in unreached parts by the blood vessels ..... |
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| 55273. |
Why carbon does not |
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Answer» Plz explain ur question a bit more .... ....... |
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| 55274. |
When do you get yellow sooty flame in the burner |
| Answer» When cabon does not burns completely. | |
| 55275. |
Which element has metalloids chemical? |
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Answer» Boron Silicon Germanium |
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| 55276. |
Function of guard cell in stomata |
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Answer» Guard cell is responsible for opening and closing of stomata. Guard cells are kidney beans shaped cells surrounding stomata.Stomata are present on epidermis ,epidermal cells doesn\'t contains chloroplast but guard cells have good amount of chloroplast . Guard cells regulate the opening and closing of stomata to facilitate gas exchange and control transpiration in plants. They help to regulate the rate of transpiration in plants by opening and closing. |
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| 55277. |
Name one organism each having saprophytic., parasitic and holozoic modes of nutrition. |
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Answer» Saprophytic (feast on dead and decaying matter)- agaricus(mushroom)Parasitic (their source of nutrition is an organism i.e host)- taenia solium (tape worm) or cuscuta (amar bel)Holozoic (taking in the complex substances and converting them into simpler forms)- homo sapiens (humans), panthera leo (lion) etc. Solve Fungus cascutta human |
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| 55278. |
explain cool and bond with the help electron. Structure and methane and nitrogen |
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| 55279. |
What is alkaline & alkelen |
| Answer» When an alkali is dissolved in water, the solution formed is known as alkaline solution. They can be formed in the laboratory or via natural processes also like erosion. Alkaline solution is basic in nature so used in the laboratory, industry etc. to make chemical reactions basic or neutral. | |
| 55280. |
Name male and female gonads in human beings. Give their functions .......Ans plz..?☺ |
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Answer» The male gonads are sperm and female gonads are ova. .They help in the sexual reproduction they play an important role in it by carrying the characteristics of the parent body and when they fuse the give rise to an zygote and further it develops into a baby. . Gonads in males are called testes and in females they are clled ovaries |
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| 55281. |
Whaf is variation |
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Answer» Variation means difference in character or traits among the individual of new species Variation means in one word is difference. |
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| 55282. |
What is froath floatation process? |
| Answer» Froath floatation is process which we used to extract the metal from their ore. 1. We take some palm oil and mix it in the tank in tank water and metal with their impurities . 2.continuolsly do circulation of that tank after some froath is absrbed. 3.in froath metal is attracted and their impurities remain in tank . 4.i n this way we extract the matal by the froath flotation method. | |
| 55283. |
write the sequence of events in the production of electricity from nuclear reactor |
| Answer» (i) The controlled fission of uranium-235 in the nuclear reactor produces a lot of heat energy.(ii) Liquid sodium or C02 gas is pumped continuously through the pipes embedded in reactor. Sodium absorbs the heat energy produced in reactor.(iii) The hot sodium is then passed into the coil of heat exchanger containing water. The water absorbs heat from hot sodium and gets converted into steam.(iv) This steam at high pressure is used to rotate the turbine. The shaft of the turbine is connected to the electric generator. When turbine rotates, its shaft also rotates and drives the generator. The generator thus, produces the electricity. | |
| 55284. |
Give a brief account of tissue culture, in plants.... |
| Answer» Tissue culture is the process of culturing single line cells under sterile, controlled conditions, in vitro by exposing them to nutrients, hormones and specific amount of sunlight. There are different steps involved in the tissue culture process.Step 1: Material is selected and sterilized for propagation of cells, in vitro initiating the process of culturing the cells.Step 2: The plant material is re-divided and placed in separate plates with medium rich in plant growth regulators. These growth regulators induce shoot formation. This process can be repeated till the desired number of plants is obtained.Step 3: The hormones which induce the formation of root are introduced into the medium. Now, complete plantlets are formed. These plantlets are transferred from lab into the green house for further growth. | |
| 55285. |
What is mendeevs piriodic law |
| Answer» Mandeleev\'s periodic law= The property of an elements are the periodic function of their atomic masses the repetation of property of elements after definite regular interval is known as periodicity of properties. | |
| 55286. |
Why carbon and its compund are bad conducter of electricty |
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Answer» Because they form covalent bond. And cannot dissociate ions .so do not conduct electricity. Because it is bad release the ammount of ch4 ion |
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| 55287. |
Unit of charge |
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Answer» Coulomb Coulomb coulomb |
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| 55288. |
Write the function of nephron |
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Answer» Function of nephron is to filter urine present in kidney.It occur in 3 steps1-ultrafiltration2-selective re-absorption 3-tubular secretion 1) It is the structural and functional unit of kidneys.2) It is thin walled, has a large surface area and is richly supplied with blood vessels.3) It removes nitrogous wastes from the blood. |
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| 55289. |
Science bii |
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Answer» What is science bii???? Hii What is science bii Hii |
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| 55290. |
What are challenges one faces to protect our environment |
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| 55291. |
Why the temp. of ******* is lower than the normal body |
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Answer» Because doing ******* Because ******* is a .... |
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| 55292. |
exact defenation of ecosystem...?? |
| Answer» | |
| 55293. |
What is evolution and hereidity |
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Answer» Evolution:\xa0The change in inherited traits in biological population over subsequent generations is called evolution.\xa0Heredity:\xa0The passing of traits from the parents to offspring is called heredity. Evolution is the sequence of gradual changes which take place in the primitive organisms over millions of years in which new species are produced Transmission of traits from one generation to next through genes is termed as heredity |
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| 55294. |
What are amploteric oxides? Give examples |
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Answer» The oxide which shows the both acid as well as basic character is called amphoteric oxide. The oxide which show acid and basic character in nature are called amphoteric oxides. Ex ZnO |
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| 55295. |
What is the full form of M.B.B.S? |
| Answer» Medicinae Baccalaureus, Baccalaureus Chirurgiaehe......? | |
| 55296. |
What is a full form of DNA |
| Answer» Deoxyribonucleic acid is the full form of DNA | |
| 55297. |
Why should biodegradable and non biodegradable waste be discarded in two separate dustbins |
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Answer» Because,it easy to know in which dustbin .the product can recycled or biodegradable. Bcoz.....non biodegradable cn\'t be decompose...so they cn be recycled as individual...n biodegradeble cn\'t be recycled.therefore its appropriate to dug them....? So that they can be recycled as it want |
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| 55298. |
Which sample paper is used to make paper in exam?Can you tell me.Please |
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Answer» U like You should go to cbse official site and check sample papers issued by cbse..They will be the best for preparations of exams........? Not confirm, but hope that " u like" is used . |
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| 55299. |
Differentiate between trait and character 5 points |
| Answer» A character is a heritable feature that varies among individuals. An example would be flower color.A trait is a variant for character, such as white or purple colors for flowers.A persons character is made up of multiple traits. Traits are parts of a persons character, i.e. traits such as happy, friendly, humourous can be part of an agreeable character.Character is feature of the organism or external appearance of the organism.Trait is inherited character and it\'s detectable variante.g consider one character as Height of plant, it is external appearance or feature while, tall and dwarf are there trait .Traits are in multiple forms and environmentally determined. | |
| 55300. |
Give a test to distinguish between butter and cooking oil chemically |
| Answer» Butter contains saturated fats. Therefore, it cannot be hydrogenated. On the other hand, oil has unsaturated fats. That is why it can be hydrogenated to saturated fats (solids). | |