InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 1151. |
quusu&hs in detail:1. What are the functions of the human skeletal system2. Name and describe the three main types of jgints founo. what are ormn TT |
| Answer» <p>The adult human skeletal system consists of 206 bones, as well as a network of tendons, ligaments and cartilage that connects them. </p><p>The skeletal system performs vital functions — support,movement, protection,blood cell production,calcium storageandendocrine regulation— that enable us to survive.</p> | |
| 1152. |
Name the disease causes by low intake of iron? |
| Answer» <p>Mineral- IronDeficiency disease- AnaemiaSource of mineral- green leafy vegetables, bananas,cereals,egg,yolk</p> | |
| 1153. |
causes a disease known as6. Proper functioning of our die6. Proper functioning of our digestive system is due to the presence of |
| Answer» <p>proper functioning of our digestive system is due to the presence of.......... in our diet </p> <p>Fiber is a type of carbohydrate, but its primary purpose is to aid in digestive processes. ...</p> | |
| 1154. |
what is formula of rust |
| Answer» <p>Rustconsists of hydrated iron(III) oxides Fe2O3. · nH2O, iron(III) oxide-hydroxide (FeO(OH), Fe(OH)3.</p> <p>There are lots of rusts, which are oxidation products of metals. The common one is that of iron, ferric oxide Fe2O3. As a mineral it is called hematite. As Fe2O3 is formed, it is brittle and it breaks off, exposing deeper atoms of Fe to further oxidation. Contrast that behavior with Al. It oxidizes on its surface to Al2O3, but that "rust", called aluminum oxide or alumina, remains and protects the deeper Al atoms from further oxidation.</p> | |
| 1155. |
Why is glass considered a super cooled liquid? |
| Answer» <p>Glass is an amorphous solids, it has tendency to flow but very slowly. This is the cause that glass is considered as super cooled liquid.</p> | |
| 1156. |
2. What is composting? |
| Answer» <p>Compost is organic matter that has been decomposed in a process called composting. This process recycles various organic materials otherwise regarded as waste products and produces a soil conditioner. Compost is rich in nutrients.</p><p>Composting is a process via which decomposed organic materials is converted into a rich soil known as compost that help plants grow.</p> | |
| 1157. |
1.Slate the law of conservation of mass. |
| Answer» <p>Thelaw of conservation of mass statesthatmassin an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to thelaw of conservation of mass, themassof the products in a chemical reaction must equal themassof the reactants.</p> <p>Thelaw of conservation of mass statesthatmassin an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to thelaw of conservation of mass, themassof the products in a chemical reaction must equal themassof the reactants</p> <p>• The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.• According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.• The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.</p> <p>Thelaw of conservation of mass statesthatmassin an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to thelaw of conservation of mass, themassof the products in a chemical reaction must equal themassof the reactants.</p><p>please like my answer and then I will also like your answer.</p> | |
| 1158. |
paptiatuy misciblo iquids |
| Answer» <p>Themiscibilityof a pair ofliquidsrefers to the degree to which they mix spontaneously. A pair ofpartially miscible liquidsmixes under some conditions but not at others. The phase diagram for a pair ofpartially miscible liquidsand illustrates their behavior as a function of temperature and overall composition.</p> | |
| 1159. |
Q6.A closed vessel contains equal number of molecules of N2 and 02 at a total pressure of 650 mm. If N2 iscompletely removed the pressure wilA) Drop to 650/3C) Remain unchangedB) Drop to 650/2D) Become 650 x 2holo ie 2 minutes It takes 5.65 minutes |
| Answer» <p>option b)Equal no. of molecules means that the no. of moles of both the compounds are equal.</p><p>Hence the mole fraction of each of the component of the mixture is 1/2.</p><p>Partial pressure = 1/2 Total pressure.</p><p>Now since N2 is removed the total pressure would be equal to the partial pressure exerted by the O2 gas and vice versa.</p><p>Therefore, the pressure after the N2 of any gas would be equal to P/2 mm of Hg.</p> | |
| 1160. |
07.What is meant by rarer and denser medium? |
| Answer» <p>Optically denser medium, the medium in which the speed of light is lesser as compared to rarer medium.i.e. water</p><p>Optically rarer medium, the medium in which the speed of light increases compared to denser medium.i.e. Air</p><p>The denser and rarer medium don't depend upon the density of the medium.</p> | |
| 1161. |
Causes of Water Pollution |
| Answer» <p>Water pollutionis caused due to several reasons. Here are the few major causes of water pollution:</p><p>Sewage And Waste Water:Sewage, garbage and liquid waste of households, agricultural landsand factories are discharged into lakes and rivers. These wastes contain harmful chemicals and toxins which make the water poisonous for aquatic animals and plants.</p><p>Dumping:Dumping of solid wastes and litters in water bodies causes huge problems. Litters include glass, plastic, aluminum, styrofoam etc. Different things take different amount of time to degrade in water. They affect aquatic plants and animals.</p><p>Industrial Waste:Industrial waste contains pollutants like asbestos, lead, mercury and petrochemicals which are extremely harmful to both people and environment. Industrial waste is discharged into lakes and rivers by using fresh water making the water contaminated.</p><p>Oil Pollution:Sea water gets polluted due to oil spilled from ships and tankers while traveling. The spilled oil does not dissolve in water and forms a thick sludge polluting the water.</p><p>Acid Rain:Acid rain is pollution of water caused by air pollution. When the acidic particles caused by air pollution in the atmosphere mix with water vapor, it results in acid rain.</p><p>Global Warming:Due to global warming, there is an increase in water temperature. This increase in temperature results in death of aquatic plants and animals. This also results in bleaching of coral reefs in water.</p><p>Eutrophication:Eutrophication is an increased level of nutrients in water bodies. This results in bloom of algae in water. It also depletes the oxygen in water, which negatively affects fish and other aquatic animal population.</p> | |
| 1162. |
ing mass ratio n 1 are interconnected by a light inextensible string that passes over asmooth pulley. If the system is released, then the acceleration of the centre of mass of the system is(A) (n-1) g22n +1n +1(c) -1n +1D)9n-1n-1 |
| Answer» | |
| 1163. |
what is a air pollution |
| Answer» <p>Air pollutionis a mixture of solid particles and gases in theair. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part ofair pollutionin cities. When ozone formsair pollution, it's also called smog. Someair pollutantsare poisonous.</p> | |
| 1164. |
Earthworms breathe through their(a) skin(b) gills(c) lungs(d) stomata |
| Answer» <p>a) skin</p> | |
| 1165. |
\begin{array} { l } { \text { Differentiate between: } } \\ { \text { i. Alluvial soil and Mountain soil } } \\ { \text { ii. Black soil and Laterite soil } } \end{array} |
| Answer» <p>*Alluvial soil is formed due to the deposition of alluvium from the river whereas laterite soil is formed due to leaching in wet and hot areas.</p><p>*Alluvial soil is light grey in colour whereas laterite soil is reddish.</p><p>* Alluvial soil isn,t acidic whereas laterite soil is acidic and coarse.</p><p>*Alluvial soil is found in peninsular region whereas laterite soil is found in areas of western ghats.</p> <p>Aluvial soil is very fertileblack soil has ability to retain water and become sticky when wetlaterite soil os formed by leaching process</p> | |
| 1166. |
clayey and sandy soils |
| Answer» <p>Clayey soil =></p><p>1.The proportion of fine particle is higher.2.Particles are packed tightly.3.It can hold good amount of water.4.Water can not drain quickly.5.It is heavy in weight.6.Less air is trapped between the particles.7.It is rich in humus.</p><p>Sandy soil =></p><p>1.The proportion of large particles is higher.2.Particles are loosely packed.3.Its ability to retain water is low.4.Water can drain quickly.5.It is light in weight.6.More air is trapped between the particles.7.It is not rich in humus.</p> | |
| 1167. |
In quadrilateral ACBD,﹀AC = AD and AB bisects (A(see Fig. 7.16). Show that AABCA ABDWhat can you say about BC and BD?. |
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| 1168. |
Describe sex-linked inheritance with the help of examples. |
| Answer» <p>In mammals, the female is homogametic, with twoXchromosomes (XX), while the male is the heterogameticsex, with oneXand one Y chromosome (XY). Genes on theXor Y chromosome are calledsex-linked.</p> | |
| 1169. |
role of fibre in plants |
| Answer» <p>Theimportance of Fibre.Fibreis made up of the indigestible parts or compounds ofplants, which pass relatively unchanged through our stomach and intestines. The mainrole of fibreis to keep the digestive system healthy. ...Fibreis largely a carbohydrate</p> | |
| 1170. |
Why do we need to store food grains |
| Answer» <p>We need to store food grains because when there is no rainfall food grains won't grow and then we can use these food grains to eat.</p> <p>We need to store grains because it is nece3</p> <p>We need to store food grains because when there is no rainfall then the crops cannot grow without water then we can use those stored food grains to eat </p> | |
| 1171. |
clo2 prepare |
| Answer» <p>Inthe laboratory, ClO2can be prepared by oxidation ofsodium chloritewith chlorine:</p><p>2 NaClO2+ Cl2→ 2 ClO2+ 2 NaCl</p><p>Traditionally, chlorine dioxide fordisinfectionapplications has been made from sodiumchloriteor the sodium chlorite – hypochlorite method:</p><p>2 NaClO2+ 2 HCl + NaOCl → 2 ClO2+ 3 NaCl + H2O</p><p>or the sodium chlorite – hydrochloric acid method:</p><p>5 NaClO2+ 4 HCl → 5 NaCl + 4 ClO2+ 2 H2O</p><p>or the chlorite – sulfuric acid method: 8ClO2−+ 4H2SO4→ 4ClO2+ 2HClO3+ 4SO42−+ 2H2O + 2HCl</p><p>All three sodium chlorite chemistries can produce chlorine dioxide with high chlorite conversion yield, but unlike the other processes the chlorite-sulfuric acid method produces completely chlorine-free chlorine dioxide, although it suffers from the requirement of 25% more chlorite to produce an equivalent amount of chlorine dioxide. Alternatively,hydrogen peroxidemay be efficiently used in small-scale applications</p> | |
| 1172. |
Food chains end with- |
| Answer» <p>starts with the primary source like the sun or hydrothermal vents where producers makefood, continues with consumers or animals who eat thefood, andendswith the top predator..</p> | |
| 1173. |
___________ requires no medium for heat transfer for the processp |
| Answer» <p>Radiation requires no medium for heat transfer for the process</p> | |
| 1174. |
It is the world's highest mountainpeak. It is 8848 mabove sea level.4. Mit werish(Nepal) |
| Answer» <p>Mount Everest, known in Nepali as Sagarmatha and in Tibetan as Chomolungma, is Earth's highest mountain above sea level, located in the Mahalangur Himal sub-range of the Himalayas. The international border between Nepal and China runs across its summit point.</p> | |
| 1175. |
cellExplain construction and working of Photovoltaic |
| Answer» <p>A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.</p><p>It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light.</p><p>Solar cells are the building blocks of photovoltaic modules, otherwise known as solar panels.The operation of a photovoltaic (PV) cell requires 3 basic attributes:</p><p>The absorption of light, generating either electron-hole pairs or excitons.</p><p>The separation of charge carriers of opposite types.</p><p>The separate extraction of those carriers to an external circuit.</p> <p>Construction-It essentially consists of a silicon PN junction diode with a glass window on top surface layer of P material is made extremely thin so, that incident light photon’s may easily reach the PN junction.</p><p>Working of solar cell1) Solar cell works under the principle of photovoltaic effect-when light is incident on ‘P-N’ junction a potential gets developed across the junction, this potential is capable of driving a current through the circuit.</p><p>2) Hence light energy is getting converted to electrical energy.</p><p>3) Here electrons absorbs photons having energy greater than the band gap energy hence they can make transition from the valence band to the conduction band & hence contributes current.</p><p>4) The wavelength of light is given by the relation,Eg=h=hc/λ=1.24</p> | |
| 1176. |
Explain construction and working of Photovoltaic |
| Answer» <p>Construction and working of Solar Cell. It essentially consists of a silicon PN junction diode with a glass window on top surface layer of P material is made extremely thin so, that incident light photon's may easily reach the PN junction. ... In this way free electrons and holes are generated on both sides of the junction ..</p> | |
| 1177. |
Acrosome reaction in sperm is triggere |
| Answer» <p>Ans :- It allows spermatozoa to penetrate the zona pellucida and fuse with the oocyte membrane. Spermatozoa unable to undergo theacrosome reactionwill not fertilize intact oocytes. ... The steroid hormone progesterone has been shown to evoke critical responses inspermcells leading to theacrosome reaction.</p> | |
| 1178. |
16.Balance the following chemical reactiona) HNO3 + Ca(OH)2 â Ca(NO3)2 +H2Ob) Bach +H2SO |
| Answer» <p>Ca(OH)2+2HNo3= Ca(No3)2+2H2O</p><p>BACl2+ H2So4= BASo4+2HCl</p> | |
| 1179. |
explain working of Air conditioner ? |
| Answer» <p>As with all air conditioning systems the principle remains the same whereby the heat is removed from one area and replaced with chilled dry air and the hot air is expelled, normally to the outside atmosphere. As you can see from this typical example of a air conditioning system, the ambient air is drawn over the condensor that can best described as a ‘radiator’ as seen on motor vehicles but instead of water running through the system it contains a refrigerant gas.</p><p>On its journey around the system it has three main stages; the evaporator contains the sub-cooled refrigerant and air blows through its veins to release the chilled dry air into the room, the condenser contains the high temperature gas that once again air is blown through the veins collecting the heat as it passes through and this is then expelled outside.</p> <p>thankyou sir</p> | |
| 1180. |
1. Write the ivalanced chemical equation for the following reactionCalcu: m hydroxide+ ca rbon dioxide → Calcium carbonate+water |
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| 1181. |
Write 10 lines on the usefulness of microor |
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| 1182. |
Vapour Pressure of a liquid |
| Answer» <p>Vapour pressure can be defined as pressure formed by the vapor of the liquid (or solid) over the surface of the liquid. This pressure is formed in a thermodynamic equilibrium state in a closed container at a certain temperature. Liquid’s evaporation rate is identified by the equilibrium vapor pressure. Vapour pressure increases with the temperature. The boiling point of the liquid is the point when the pressure exerted by surrounding equals to the pressure exerted by vapor. In this chapter, we will study more about the Vapour Pressure on liquids and its characteristics.</p> | |
| 1183. |
Explain briefly the examples of physical changes.Give examples of chemical properties. |
| Answer» <p>Some common physicalpropertiesare odor, density, melting point and boiling point, while some commonchemical propertiesare heat of combustion, enthalpy of formation, toxicity, and flammability, each of which will be covered in this lesson</p> <p>Examples of Physical changes: 1. Ice melting involves achangefrom a solid to a liquid and the substances maintain the properties of water because the molecules neverchange. ... Water boiling is aphysical changeas water molecules vibrate faster, they enter the gas phase and become water vapor</p> | |
| 1184. |
Explain that physical changes are mostly reversible but can be also irreversible by giving anexample of each.2. |
| Answer» <p>Ans :- Some physical changes are reversible and some are not.</p><p>If you freeze water, that’s a physical change. It’s still water but it’s changed form from liquid to solid. You can reverse the physical change by letting the solid ice melt, and it returns to liquid.</p><p>If you cut a limb off a tree, that’s a physical change, but it wouldn’t be easy to reverse the change. If you crack a raw egg, that’s a physical change that would not be likely to be reversed.</p> <p>thank you so nice of you</p> | |
| 1185. |
Explain how you can locate the Pole Star with the help of Ursa Major |
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| 1186. |
Explain how you can locate thePole Star with the help of Ursa Major. |
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| 1187. |
1. Explain the difference between physical and chemical changes, giving one example of each. |
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| 1188. |
While looking up at the sky, how can you distinguish between a planet and a star |
| Answer» <p>Planet1.It do not emits their own light.2.It do not twinkle.3.It is made ou of rock.Star1.It emits their own light.2.It is twinkling.3.It is in gaseous form.</p> | |
| 1189. |
F CNG is a superior fuel to petrol. Why? |
| Answer» <p>fuel. It is actually the cleanest of all fossilfuels. ...CNGalso produces 45% less hydrocarbonsthan gasoline. And although natural gas also produces greenhouse gases, it is considerably reduced compared togasolineordiesel</p> <p>Compressed natural gas is a clean-burningfuel. It is actually the cleanest of all fossilfuels. ...CNGalso produces 45% less hydrocarbonsthan gasoline. And although natural gas also produces greenhouse gases, it is considerably reduced compared to gasolineordiesel.</p> | |
| 1190. |
FCNG is a superior fuel to petrol. Why? |
| Answer» | |
| 1191. |
. Explain how waste can be harmful for our health. |
| Answer» <p>Waste when nor properly dumped causes hazardous effects such as green house effects, spreading of carcinogenic substances, polluting soil by making the land barren. </p><p>Overall waste lays negative impact on the environment. It affects the aquatic life when waste is dumped into oceans and other water bodies. </p><p>Nuclear waste pollutes the earth as it emits harmful radiation which is very bad for health. Waste pollutes the environment and it produce harmful effects on the health.</p> | |
| 1192. |
explain why there is no waste in a forest |
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| 1193. |
2.Why do we say that charges are always produced in pairs'? |
| Answer» <p>This is because everything in nature is neutral so when we go to produce current from any neutral object then it produce in pairs.</p><p>Please hit the like button if this helped you</p> | |
| 1194. |
4) 'Wealth from waste,;'explain in your words. |
| Answer» | |
| 1195. |
(c) Health is Wealth |
| Answer» <p>Health is wealth .Is a famous proverb which saying that refers to the health is important to us.if we are not healthy (in state of physical , chemical or biological state),wealth means nothing to us .So our health is a real wealth .we should always try to be healthy.</p> | |
| 1196. |
1.55 x 9.82. 49 x 9.83. 49 x 8.6If the tension in the supporting cable is 48000N then an elevator weighing 40000kg moves upward.acceleration is34.Then the upward1. 1ms22. 1.2ms3. 2.2ms'4. 2.5 ms |
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| 1197. |
what causes an upward pull by which the sap moves against the force of gravity? |
| Answer» <p>It occurs because of transpiration which is the loss of water through the leaves of plant.</p><p> As water is lost it is also pulled up and this pull is called as transpirational pull.</p> | |
| 1198. |
au)An electron beam is acccerated by a patenti diererce 1UO volts. wnatthe wavelength associated with the electron heani?(Mass of electron -9. 1X 10-3ikg, Charge of clectrou- 16 X 10 |
| Answer» <p>Energy acquired by the electron beam after being accelerated by a potential difference of 10000 volts = 10000 eV= 10000 × 1.602 × 10^-19 J( 1eV = 1.602 × 10^-19 J )= 1.602 × 10^-15 JThus, kinetic energy = 1.602 × 10^-15 J1/2 mv^2 = 1.602 × 10^-15 J1/2 × 9.1 × 10^-31 × v^2 = 1.602 × 10^-15 Jv^2 = 0.3521 × 10^16 v^2 = 35.21 × 10^14v = 5.934 × 10^7 ms-1Therefore, λ = h/mvλ = 6.626 × 10^−34/ 9.1 × 10^−31× 5.934 × 10^7λ = 0.1227 ×10^−10 m </p> | |
| 1199. |
Jation that you come acrosuld we purify water before drinking?nswer the following quest |
| Answer» <p>Water purifyingsystems can reduce the risk of medical conditions such as bladder cancer, colon cancer and rectal cancer by removing chlorine and nasty bacteria indrinking water.Drinkingpurewatergenerally protects the body from disease that may damage health</p> | |
| 1200. |
o uld you show that settinExplan why hurningof wood and cutting it into stan diferent types of changes |
| Answer» <p>When we burn wood, it turns into ashes which is a new substance and process is irreversible one, hence is a chemical change. While cutting the wood into small pieces no new substance is formed, hence is a physical change.</p> | |