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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.
| 44151. |
Define excretion |
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Answer» ExcretionExcretion is the process of removing harmful metabolic wastes such as urea, uric acid and salts from the body.Excretion in organisms\tUnicellular organisms, like amoeba, remove wastes by simple diffusion from the body surface into the surrounding water.\tLower multi-cellular organisms like flat worms use flame cells while earthworms use nephridia for excretion.\tHigher multi-cellular organisms like fish, frogs, lizards, birds and humans use kidneys for excretion.\xa0Homeostasis is the tendency of the physiological system of higher animals to maintain internal stability of the body. The process of removal of metabolic waste from the body is called excretion |
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| 44152. |
How to find power of the eye lens |
| Answer» 1/focal length | |
| 44153. |
esterification reaction ?Saponification reaction ?Hydrogenation ? |
| Answer» Esterification reaction\xa0The reaction between Acid and an Alcohol to produce ester as the product is called Esterification reaction. During this reaction a molecule of water is eliminated.Ex: CH₃COOH + C₂H₅OH →CH₃COOC₂H₅ + H₂OIn the above reaction Ethanoic acid reacted Ethyl alcohol to form an ester Ethyl Acetate and water molecule.\xa0Saponification:Esters react in the presence of an acid or a base to give back the alcohol and carboxylic acid. This is called saponification reaction. This is reverse reaction of esterification reaction.CH3COOC2H5 + NaOH →\xa0CH3-COOH + CH3-CH2-OH\xa0Hydrogenation Hydrogenation is the process of addition of hydrogen. Unsaturated hydrocarbons are added with hydrogen in the presence of palladium and nickel catalysts to give saturated hydrocarbons.\xa0 | |
| 44154. |
ek baat reproduction chptr hmmarae syllabus m kyu diya h?? |
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Answer» For more information and knowledge Aise hi manmarjian |
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| 44155. |
function performed by testis in human beings |
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Answer» It is the reproductive organ in males and *** hormones producer also it can make testosterone hormone and sperm Produce sperm and testosteron |
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| 44156. |
What happen when lead nitrate is heated..? |
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Answer» 2Pb(NO3)2-----------2PbO+4NO2+O2 Form co2gas |
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| 44157. |
One mark questions pls.. |
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Answer» Chemistry... Bio chem ya physics |
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| 44158. |
different types of concraception?? |
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Answer» Barrier methodSurgical method IUCD method Ofcourse Surgical,Barrier,pillsetc SurgicalBarrier AndSelf- control |
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| 44159. |
Name the floral part of the plant that develop into fruit and seeds |
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Answer» Ovary Ovary |
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| 44160. |
Why don\'t we categorize hydrogen as metalloid but it shows properties of both metal and non metal?? |
| Answer» Thats only assumption thats why hydrogen donot have fix posision in perodic table | |
| 44161. |
What is Genotype & Phinotype |
| Answer» Genotype is the set of genes that carries specific information for a particular trait like character. For example though genes carry the information for height, the actual information of height if the person is tall or short, is due to alleles. Alleles are the variations of genes. There are 2 alleles (1 on each chromosome) present; i.e. we get 1 allele from mother and 1 from father. The 2 alleles from both mother and father might either be the same or different.Phenotype on the contrary is responsible for the outward, physical appearance of the organism. The phenotype includes physical characteristics, behaviours corresponding to such species, structures, organs, reflexes, etc.\xa0 | |
| 44162. |
How can i passed in science |
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Answer» Laughable Hmm himalya jake tapasya kro vats...uparwala sbki sunta h By doing study |
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| 44163. |
why mensuration occurs?? |
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Answer» Because endometrum wall of urter breaks U understood my answer Thik linings of uterus breaks and causes bleeding called menstruation when ovary eggs cant meet with sperm and cant form zygote then after 28 days they get broken...this process is known as mensuration |
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| 44164. |
What is aerobic and anaerobic respiration? |
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Answer» Aerobic is in presence of oxygenAnaerobic is in limited or in absence of oxygen Aerobic means presence of oxygen and anaerobic means absence of oxygen (break down of glucose)? Aerobic respiration present in oxygen in mitrochania |
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| 44165. |
Which chapter is important |
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Answer» Life process,carbon and electricity Carbon and its compound |
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| 44166. |
lemon and curd have which acid |
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Answer» Curd....lactic acid, lemon....citric acid Curd lactic acid Lemon has citric acid and curd has lactic acid Citric |
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| 44167. |
What are indicator and how may type of indicator |
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Answer» Indicator are of many types Example:universal indicator,olfactory,turmeric,red cabbage leaves,blue,red nd phenolphthalien...l think itne kafi h Indicator show the presence of acid and base. It has two types natural indicators and artificial indicators. Which indicators we obtain from nature is known as natural indicators. Which indicators are made by man is known as artificial indicators. There are 3 types of indicator Indicators are substance which show weather the given solution is acidic or basic |
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| 44168. |
Why sky appear blue? |
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Answer» Due to scattering of sunlight. Due to atmospheric refraction stars twinkle Due to scaterrring of sunlight Due to atmospheric refraction |
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| 44169. |
What is the scientific name given to the stalk of ovule? |
| Answer» Pedicel | |
| 44170. |
What is homologous organ |
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Answer» Organs basic structure andborigin are similar but functions are different such organs are called homologous organ the organs having same basic structure but different functions . eg. forelimbs of frogs and humans Organs which have same structures but different functions |
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| 44171. |
Please tell me about important diagram of 10class ncert science book |
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Answer» 100 persent Male reproductive system Diagrams frm chp 8,Chp 10 ray diagramsChp11 eye defectsChp 13 motor n generetor Human heart, female reproductive system,excretory system ,human brain and human eye Digest system |
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| 44172. |
What are the different ways in which metal oxide are reduced to metals |
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Answer» Metal oxide are reduced to metal by using suitable reducing agents such as carbon. By simple heating or in precense of suitable catalyst |
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| 44173. |
is solar cooker is pollution free |
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Answer» yes. Yes Yes,it is pollution free. |
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| 44174. |
Ch3cooh |
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Answer» Acetic acid What do u want to know in this |
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| 44175. |
Why can\'t 2 magnetic field lines intersect? |
| Answer» If they do then at the point of intersection magnetic compass will show two different directions which is not possible | |
| 44176. |
Hydrogen is not a metal , yet it is placed in the activity series of metal. Give reason. |
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Answer» it was considered as a wandering element in mendeleev\'s table as it acts as both metal and nonmetal but since modern periodic table is based on atomic number it is placed with metals( its atomic number being 1) Because it loses ion to form cation It is metal |
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| 44177. |
Device which helps to maintain potential difference across a conductor |
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Answer» Battery. Us satakshi is right it will be a battery or cell Voltmeter. Voltmetre Battery or cell Battery or cell |
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| 44178. |
What is olfactory lobes. |
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Answer» The lobes from where olfactory receptors is work due to gland the smell works through it Lobes which are use for smell or oudar is called olfactory lobes.. Nose |
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| 44179. |
Why urine is produced at copulation |
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Answer» Yes Urine is not produce during copulation that is a thing which is produce os sperm. What |
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| 44180. |
How are alveoli designed to maxmise the exchange of gasses |
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Answer» Aleveoli\'s wall are moistened which help in easy exchange and it\'s wall are well riched provided by bunch of blood capillaries, it\'s walls are very thin. The exchange of gases in alveoli occurs by phenomenon of diffusion....... Hope it will help u ??? The wall of alveoli is delicate and richly supplied with blood capillaries. The really increase the surface area for exchange of gases. They have a balloon like structure that maximize the surface area for exchange of gases The bronchioles is rhe balloon like structure called alveoli.It provide the extensive area for exchange of gases.. Inside lungs the pair of air passage divides into smaller and smaller tubes which finally terminate in balloon like structure called alveloli . These alveoli contain ab extensive network of blood vessels and in this way provide a large surface where the exchange of gasses can take places |
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| 44181. |
Why carbon does not form cation and anion? |
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Answer» Why do you think that i have copied this answer. No element is a cation or an anion. That includes carbon. Some may become ions through chemical reactions. Those most likely to become cations are on the left side of the Periodic Table because they have just one or two valence electrons with a low ionization potential. Carbon is a tetravalent atom. It has to lose or gain four electrons to attain stability. But it is very difficult to lose or gain electrons as it requires a large amount of energy.So, the element carbon shares electrons to achieve stability. As cations and anions are formed only when an atom loses or gains electrons, so carbon doesn\'t form any type of ions It takes a lot of energy..to form -4 cation..plus its highly unstable bcz it shares electron |
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| 44182. |
WHAT is double fertilisation in easy ways |
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Answer» Double fertilization : It occurs when one male nucleus fertilizes (fuses) with egg cell to form zygote cell and other male nucleus fuses (fertilizes) with two polar nuclei to cause triple fusion. As these two types of fertilizations take place at the same time in the ovule of the plant, it is known as double fertilization.After fertilization:(i) Ovary develops into fruit.(ii) Ovules develop into seeds. It is very complex process in plants. It is formed when the female gamatopyte met with two male gamate.. |
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| 44183. |
Write the mechanism by which fishes breathe in the water |
| Answer» Normally fish breath by taking water into their Gills, like lungs, contain many blood vessels with very thing walls i.e. capillaries. As the water passes over the thin walls of the gills dissolved oxygen moves into the blood stream and carbon dioxide is released out into the water.Different fishes use different methods. For example most sharks use a method of breathing called ram ventilation where instead of taking water into their mouths and breathing it out through their gills water passes through the gills as the shark swims through the water. This means the constantly have to keep moving. | |
| 44184. |
How do fossil form layer by layer? |
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Answer» You are in which class Due to long period of time |
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| 44185. |
Why non metals cannot displace hydrogen from the acids? |
| Answer» Metals are usually electron donors, that is, they are electropositive. Hydrogen is also an electron donor in Water molecule to Oxygen atom. Metals with more electropositivity can replace Hydrogen from water like Sodium. So such metals replace Hydrogen in dilute acids and form salts.\xa0Example: 2 Na + 2 HCl ==> 2 Na Cl + H2\xa0Non metals can be electron acceptors or electron donors. If they are electron acceptors, then they are electronegative. They may replace Oxygen or Hydroxide or a Halogen. But they do not replace Hydrogen.\xa0Many non-metals are below Hydrogen in the reactivity series. They are weaker than Hydrogen. So they do not displace Hydrogen from dilute acids. So nonmetals do not react with dilute acids.\xa0 | |
| 44186. |
Plz help how to convert mA to A (miliampere to ampere) |
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Answer» 10 power -3 ko multiply kr dena 1 mA = 1/1000 Hope u can able to convert it Thanks 1mA = 10^-3 |
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| 44187. |
Why only glass prism refractes the light into 7 colours while glass slab not ?give reason? |
| Answer» In Glass slab incident ray and emergent ray are parallel to each other.wheares in prism they are not | |
| 44188. |
Whta is Renie? |
| Answer» Renie means pagal log | |
| 44189. |
What is used as an antacid |
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Answer» Milk of magnesia or Mg(OH)2. Also NaHCO3 or Baking Soda. Nahco3(sodium hydrogen carbonate) Sodiumbicarbonate, sodium hydrogen carbonate nahco3 Sodium bicarbonate |
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| 44190. |
It is an easy question.i know the ans wer but...u tell.in which tissue ATP is used XYLEM or PHLOEM |
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Answer» Phloem Yup Phloem |
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| 44191. |
Why can\'t most multicellular organisms give rise to new organisms through regeneration |
| Answer» Coz it not possible because they have complex body forms | |
| 44192. |
What is royal water???? |
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Answer» Royal water ( aqua regia) , is named so because it can dissolve gold and also Platinum. it is a mixture of nitric acid and hydrochloric acid in the molar 1:3 Mahender it not h2so4 it is hno3 It is also called aqua regia it is made of 3 parts of hcl or 1 part of h2so4 Aqua regia .its mixture of concentrated hcl and concentrated nitric acid in ratio 3:1It can dissolve any substance **regia** Yup u are right Aqua ragia |
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| 44193. |
why magnisium flots on water |
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Answer» Magnesium metal does not react with cold water. it react with hot water to form magnesium hydroxide and hydrogen.Mg + 2H2O → Mg(OH)2 + H2in this reaction a piece of magnesium metal starts floating in water due to the bubbles of hydrogen gas sticking to its surface.\xa0 As hydrogen bubbles gets stick to the surface of mg When mg reacts with water....h2 bubbles are produced which get stick to mg and as result it floats |
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| 44194. |
Define solenoid.Please... |
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Answer» The solenoid is a long cylindrical coil of wire consisting of a large no. of turns bound together very tightly. Solenoid is a coil of a number of turns of insulated copper wire closely wrapped in shape of a cylinder. Solenoid is cylindrical in shape. It\'s structure is like a bar magnet. Np Completing answer given by #itsme ..*.closely wrapped in shape of cylider A solenoid is a coil of many turns of an insulated copper wire closely wrapped in the form of cyinder. A coil with many turns of an insulated cooper wire closely wound in a shape of spring a coil of insulated copper wire with many turns |
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| 44195. |
Is the electrolysis of nacl is known as chlro-alkali process?? |
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Answer» No Can you pls explain proper definition cause sometime i face prob in framing answers? Yes |
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| 44196. |
what happens when silver chloride is exposed to sunlight?Also give the equation. |
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Answer» Silver chloride decomposes into silver and chlorine Silver and chlorine are obtained2AgCl -2Ag + cl2 |
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| 44197. |
Distinguish between 2 types of peripheral nerves based on their origin |
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Answer» Cranial Nerves and spinal Nerves.Cranial nerves arising from the brain and spinal nerves arising from spinal cord. Cranial nerves arises from brain and spinal nerves from spinal cord |
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| 44198. |
What is the significance of peripheral nervous system |
| Answer» Peripheral nervous system constitutes of all nerves.they Help in transfer of information from brain/spinal cord to other parts of body | |
| 44199. |
Which part of the brain maintains posture and equilibrium of the body |
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Answer» Cerebellum Cerebellum in hindbrain Cerebellum Hind brain |
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| 44200. |
How long is small intestine? |
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Answer» 6 to 7 metre 6.9 m 6 m 7metres maybe |
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