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InterviewSolution
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.
| 8151. |
What is the condition when the temperature is constant but heat is given continously? |
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Answer» Letent heat of fusion When change of state of a matter take place |
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| 8152. |
What is the S.I. unit of current? |
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Answer» Ampere Ampere Ampere Its ampere |
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| 8153. |
Assertion and reason type questions |
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| 8154. |
Difference between transversal and longitudinal waves |
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Answer» Wave in which the particle mov to and fro about the mean position in the direction of propagation of sound is called longitudinal wave and wave in which the particle vibrate up and down at right angle is called transversal wave Longitudinal Wave -> A wave in which the particles of the median vibrate back & forth in the same direction . In which the wave is moving . . These waves can be produced in all the 3 median that is solid , liquid, GasTransverse wave-> A Wave in which the particles.of median vibrate up&down at right angle to the direction. These waves can be produced only in solids and liquids , but not in Gases \tLongitudinalTransverseThe movement of the medium is of the same direction of the waveThe movement of the medium is perpendicular to the direction of waveIt acts in one dimensionIt acts in two dimensionThe wave cannot be polarized or alignedThe wave can be polarized or alignedThis wave can be produced in any medium such as gas, liquid or solidThis wave can be produced in solid and liquid’s surfaceEarthquake P wave is an exampleEarthquake S wave is an exampleIt is made of refractions and compressionsIt is made of troughs and crests\t |
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| 8155. |
what is virus? |
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Answer» Viruses are non-cellular, microscopic infectious agents that can only replicate inside a host cell. From a biological perspective, viruses cannot be classified either as living organism nor non-living. This is due to the fact that they possess certain defining characteristic features of living organisms and non-living entities. A virus is a biological agent that reproduce inside the cell of living hosts |
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| 8156. |
Define natural resources. Name two types of natural resources |
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Answer» Anything which fulfill our physical needs is called natural resource Type of natural resources are exhaustible and inexhaustible The resources that we get from nature those are natural resources Anything and everything that is available naturally on earth is\xa0a natural resource. We can further divide them into:Biotic & AbioticAny life form that lives within nature is\xa0a Biotic Resource, like humans, animals, plants, etc. In contrast, an abiotic resource is that which is available in nature but has no life; like metals, rocks, and stones. Both biotic and abiotic resources can be renewable or non-renewable.Renewable & Non-renewableRenewable resources are almost all elements of nature which can renew themselves. For e.g. sunlight, wind, water, forests and likewise. While, non-renewable resources, are limited in their quantity. Like fossil fuels and minerals. Though these resources take millions of years to form, they would eventually get over within our lifetime if we use continuously. |
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| 8157. |
What is AMU? |
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Answer» Atomic mass unit AMU is Atomic Mass Unit..... AMU means atomic mass unit .It is used to denote the mass of an atom. But in now days atomic mass is dènote in u which means unified mass. AMU means atomic mass unit. It is used to denote the mass of an atom AMU means atomic mass unit. It denote the mass of atom AMU means atomic mass unit. It is used to denote the mass of an atom |
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| 8158. |
What is the molecular mass of NaNO3 |
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Answer» 85 85 we will add the atomic masses of :-Na+N+O*3so we\'ll get the equation:23+14+16*3=23+14+48=85 85 is the answer |
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| 8159. |
Who is marie Curie |
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Answer» Marie curie is first woman who received the nobel prize 2 times on chemistryin 1911 and physics in 1903 She was the first women who recieve nobel prize in the field of radioactivity Marie curie was the first woman scientist to recieve nobel prize.She contributed in research in the field of radioactivity. |
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| 8160. |
What is the full form of ppm and what it means |
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Answer» Ppm stands for parts per million .It is a way of expressing very dilute concentration of substances Parts per million |
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| 8161. |
Who discovered the gravity |
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Answer» Issac newton Issac newton The Universal Law of gravitation was coined by Sir Issac Newton. |
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| 8162. |
what is the difference between xylem and phloem |
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Answer» Main difference is that Xylem transport water from roots to other part of plant but phloem transport food material from leaves to other part of plant \tXylemPhloemXylem tissues are tubular shaped structure, with the absence of cross walls. This tissue resembles the shape of a star.Phloem tissues are elongated, tubular shaped structures that include thin sieve tubes with walls.Xylem occupies the centre of the vascular bundle.Phloem is located on the outer side of the vascular bundle.Xylem fibres are smaller.Phloem fibres are larger.They are present in leaves, stems, and roots.They are present in leaves, roots, stems but transports and grow in fruits seeds and roots.These tissues move in a Unidirectional. (only in one direction – upward direction)These tissues move in a Bidirectional. (both ways – up and down)They live with hollow dead cells.They live with cytoplasm without the nucleus.The total amount of xylem tissue is more.The total amount of phloem tissue is less.It consists of tracheids, vessel elements, xylem parenchyma, xylem sclerenchyma and xylem fibres.It consists of four elements: sieve tubes, companion cells, phloem fibres, bast fibres, intermediary cells and the phloem parenchyma\t |
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| 8163. |
Compare all the proposed models of an atom given in this chapter |
| Answer» Thomson\'s model of an atom:1. An atom consists of a sphere of positive charge with negatively charged electrons embedded in it.2. The positive and the negative charges in an atom are equal in magnitude due to which an atom is electrically neutral.Rutherford\'s model of an atom:1. There is a positively charged, highly densed centre in an atom called the nucleus. Nearly the whole mass of an atom resides in the nucleus.2.The electrons revolve around the nucleus in circular path.3. The size of the nucleus is very small compared to the size of an atom.Bohr\'s model of an atom:1.An atom is made up of 3 particles electrons, protons and neutrons. Due to the presence of equal number of electrons and protons, atom on the whole is electrically neutral.2. The protons and neutrons are located inside the nucleus due to which nucleus is positively charged.3. The electrons revolve around the nucleus in fixed paths called orbots or shells or energy levels. The energy levels are represented as K,L,M,N or 1,2,3,4,5,.....4. There is a limit to the number of electrons each energy level can hold. It is given by the formula 2n^2 where n is the orbit number .5. Each energy level is associated with fixed amount of energy, the shell nearest to the nucleus having minimum amount of energy and the one farthest having maximum energy.6. There is no change in the energy of electrons as they keeping revolving in the same shell and the atom remains stable.\xa0 | |
| 8164. |
What is difference between the cell wall of plants and fungi |
| Answer» One of the main differences between plants and fungi is that fungi have chitin as a component of their cell walls instead of cellulose. Both chitin and cellulose are comprised of polysaccharide chains. In plants the monomer in this chain is glucose and in fungi it is a modified form of glucose called N-acetylglucosamine. Another contrast between plants and fungi is the presence of chlorophyll in plants and not in fungi. Fungi absorb all the nutrients they need from the soil unlike plants which require chlorophyll to conduct photosynthesis. | |
| 8165. |
Calculate the ratio of the number of molecules in 32g of oxygen and 8g of hydrogen? |
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Answer» 1:4 1:4 |
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| 8166. |
Baking soda of the formula mass |
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Answer» NaHCo3 NaHCO3 The chemical formula of baking powder is NaHCO3.Molecular mass of baking powder (NaHCO3) = 23 + 1 + 12 + 3 X 16= 84g/mole |
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| 8167. |
Baking soda calculate the formula mass |
| Answer» 84g | |
| 8168. |
Suggest some preventive measures against weeds |
| Answer» Use weedicides. Or use rotavators before planting | |
| 8169. |
What is retradation |
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Answer» Neagative accelaration Retardation means negative acceleration. The velocity of a body may increase or decrease .Acceleration takes place when the velocity of a body changes. So when the velocity of a body increase, the acceleration is said to be positive and when the velocity of a body decrease, the acceleration is said to be negative(Retardation).A body is said to be retarded if its velocity is decreasing. Eg: a train is said to be retarded when it slows down on reaching a station,i.e. the velocity decreases.Retardation is acceleration with negative sign. Or negative value of acceleration shows that the velocity of a body is decreasing. Whenever acceleration is negative Negative acceleration |
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| 8170. |
Property of a body by virtue of which it opposes any change in state |
| Answer» Inertia is the property of a body by virtue of which it opposes any agency that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity.\xa0 | |
| 8171. |
Differentiate between pteridophytes and phanerogams |
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Answer» Also pteridopytes have inconspicious reproductive organs ..... Pteridophyta (1) In this group, the plant body is differentiated into roots, stem and leaves.(2) examples are : marsilea, ferns and horse tail. Phanerogams (1) In this group, plants with well differentiate reproductive parts that ultimately make seeds.(2) Seeds are, result of sexual reproduction process. |
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| 8172. |
What is parenchyma, collenchyma, and sclerenchyma? |
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Answer» Parenchyma cells are found in every soft part of the plant, but collenchyma cells are found in specific part of the plant like leaves, stems, and petioles, whereas sclerenchyma cells are found in mature parts of the plants or trees. ... Parenchyma has a thin cell wall of their cells, and are made up of cellulose. Parenchyma cells are the type of living plant cells, which are known for healing and repair mechanism, and food storage. Collenchyma cells are known for providing mechanical support to the plants, by protecting the delicate inner part of the plant. Sclerenchyma cells are the matured dead cells and are found in wooden part or hard stem of the plant. |
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| 8173. |
what do you mean by husbandry |
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Answer» farm animals require proper care and management such shelter feeding breeding and this is calledas the husbandry The branch of agriculture that deals with the feeding,caring and breeding of domestic animal is called animal husbandry.Husbanding means to use a resource carefully & without wastes. |
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| 8174. |
How to transverse wave are produced in water? |
| Answer» When we drope a stone or anything in water then transverse wave are produce in water | |
| 8175. |
Why all the trees grows in upward direction as gravity acts in the downward direction |
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Answer» According to Rajneesh payal, the tree should be grown in downward direction Due to gravitational force Trees grow upward in search of sunlight ? |
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| 8176. |
What is chlorine |
| Answer» Chlorine is a non metal it is liquid it atomicity is 2 it s | |
| 8177. |
Explain is work a scale quantity or not? |
| Answer» Because work has only magnitude no direction W=FxS Where F is force and S is displacement | |
| 8178. |
Define natural resources. Name any two types of natural resources |
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Answer» Resource provided by nature on earth which can be utilised by living organisms to sustain their life are called natural resource 1.Air2.water3.land The resources which are obtained by nature to fulfill human needs are known as natural resource.Air and Water are two natural resources. |
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| 8179. |
Analyse the statement and give a valid reason1DNA is well protected in nucleus |
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| 8180. |
How to classify animalia shortly??? |
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Answer» The different Phylum of the animal kingdom as follows:1. Porifera2. Coelenterate3.platyhelminthes4.Nematoda5.Annelida6.Arthropoda7.Mollusca8.Echinodermata9.protochordata10.vertebrata Animalia has been classified into 10 different subphyla based on their body design or differentiation.The different subphylum of the animal kingdom are as follows:\tPorifera\tCoelenterata (Cnidaria)\tPlatyhelminthes\tNematoda\tAnnelida\tArthropoda\tMollusca\tEchinodermata\tProtochordata\tVertebrata |
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| 8181. |
Flow chart of biology of chapter 5,6,7 |
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| 8182. |
Paperof class 9 |
| Answer» go to cbse.online to get sample question paper on new pattern | |
| 8183. |
Name the main reserver of gaseous carbon and main deposit of biological carbon |
| Answer» The main reservoir of gaseous carbon is in the form of carbon dioxide gas, CO2. Oceans are the main depositors of biological carbon. | |
| 8184. |
What destructive effects do the CFC bring about in the atmosphere |
| Answer» Chlorofluorocarbons have two major effects in the atmosphere.1. Greenhouse effect - Chlorofluorocarbons act as greenhouse gases and are considered major contributors to the greenhouse effect. CFCs have created both unnatural atmospheric cooling and warming.2. Ozone-depletion effect - Chlorofluorocarbons are not destroyed in the lower atmosphere but waft slowly upward toward the stratosphere where they finally break down. Each of the chlorine or bromine atoms released in that breakdown is capable of destroying tens of thousands of ozone (O3) molecules - thus contributing to the thinning of the protective ozone layer. The loss of ozone allowed more UV light to pass through the stratosphere at a sufficient rate to warm the lower troposphere. The UV rays also cause considerable harm to all living organisms on Earth.Even though chlorofluorocarbons emissions are being stopped today, the destruction of the stratospheric ozone layer will still continue, because chlorofluorocarbons already released will move slowly up to the stratosphere and destroy ozone for the next 60 to 100 years. | |
| 8185. |
How are soil solution and suspension differ from each other |
| Answer» Non-homogeneous systems in which solids are dispersed in liquids, are called suspensions. A suspension is a heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium. Particles of a suspension are visible to the naked eye. Soil solution is an example of suspension. | |
| 8186. |
An element Z forms an oxide with formula z2o3. What is its valency and how? Explain |
| Answer» Valency of Z is 3. Because when Z reacts with Oxygen, their valency criss cross each other and after it becomes Z203.For eg: Na2O, for obtaining it. It will be Na-1( valency) O-2(valency)After criss cross it becomes Na2O....I hope u understand | |
| 8187. |
What is the role of cellulose in cell wall |
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Answer» Cell wall is made up of cellulose and it gives hardness to the cell wall. \tCellulose is a complex substance and provides structural strength to plants.\tCellulose provides rigidity to the plant cell and helps it to withstand in dilute medium. It gives hardness to cell wall |
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| 8188. |
What are the factors to make soil and explain them |
| Answer» The outer layer of the earth is formed of soil. So when we fall on the ground, our clothes get dirty because of soil. Its thickness varies from few millimeters to several meters. Soil formation occurs as a result of a gradual breakdown of rocks. Rocks are broken down into finer particles through many processes such as weathering and erosion. The geological components are mixed with organic materials to form soil. This implies that it is a mixture of rocks which are broken into smaller particles and the dead and decayed organic matter along with the little microbes.Plants do not grow in the sand because pure sand is only rock particulate matter and it does not contain the minerals required for the proper growth of plants. Sand can be converted into soil by adding organic matter to it. There are two main components of soil, the rock particles and the organic matter. Soil also has a lifecycle of its own. Formation of soil starts with the disintegration of rocks under certain environmental conditions. | |
| 8189. |
What is solod |
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Answer» It os unbendable and un flexable Matters which have fixed volume and shape is called as solid : example:coal, ice,brick, and it property is (1)solid are heavy particals (2)soild have a fixed volume(3)solid has high density Solid: Matters which have fixed volume and shape are called solids. For example - stone, wood, brick, ice, sugar, salt, coal, etc. All metals are solid except mercury and gallium.Properties of solids\tSolid has fixed volume.\tSolid has fixed shape.\tSolid has high density.\tSolids are heavy.\tSolid does not flow. |
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| 8190. |
What is atomic mass number? |
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Answer» Atomic mass no .=the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes Atomic mass refers to the mass of an atom. It depicts how many times an atom of an element is heavier than one-twelth (1/12th) the mass of one atom of carbon-12 of mass of one carbon atom. The relative atomic masses of all elements have been established with reverence to an atom of carbon-12. It is measured in unit called amu (atomic mass unit). 1/12 of the mass of one atom of carbon is termed as relative atomic mass. It doesnot possess a unit.Mathematically,mass of one atom of an element = atomic mass X (1/12th) of the mass of one atom of carbon.\xa0 |
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| 8191. |
Sir only annual marks add hoga |
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Answer» No Yes bro. |
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| 8192. |
What is the maximum number of electrons which can accommodated in N shell |
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Answer» 2n^2= 2*4^2= 32As the no. of electrons in N shell is 4. So acc. to Bohr and Bury. Can i know how is it How 18 8 |
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| 8193. |
State the conditions that need to be satisfied for work to be done |
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Answer» Work os done when a force produces moion When force act on a body and body is displace When the body get displacement...... |
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| 8194. |
What are called communicable diseases |
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Answer» The simplest answer is :-The disease which can be transferd from one body to anoter body in any form is called communicable disease. Examples are :- common cold and viral fiver. Communicable diseases are the infectious disease which spread from one infected organism to another organism.Examples are cold, viral infection e.t.c Communicable diseases, also known as infectious diseases or transmissible diseases, are illnesses that result from the infection, presence and growth of pathogenic (capable of causing disease) biologic agents in an individual human or other animal host |
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| 8195. |
Define atomic mass . |
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Answer» One atomic mass unit is a mass unit equal to exactly one twelfth the mass of one atom of carbon. \u200b¹⁄₁₂ of the mass of a single carbon-12 atom Atomic is the mass contained in an atom. It the mass of protons and neutrons contained in nucleus of an atom |
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| 8196. |
Define aromic mass |
| Answer» Atomic mass =Number of proton + Number of neutron | |
| 8197. |
A snail covers a distance of 100m in 50 hours calculate the average speed of snail in km/h |
| Answer» Average speed=total dist. Covered ÷ total time takenDis is 100 m = 100÷1000= 0.1=0.1*50=5km/h | |
| 8198. |
Sample paper 1 |
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| 8199. |
Activity 8.8 in chspter 8 physics |
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| 8200. |
What is the difference between rohu and dog fish |
| Answer» Rohu is a species of fish. But there is no dog fish | |