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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.
| 45151. |
When is there is no flow of current in coil |
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| 45152. |
List the products of combustion of fossil fuels. What are their adverse effects on the environment |
| Answer» SO2, CO2, CO, NO2 and water. Sulphurdioxide and nitrogen dioxide are poisionous gases which causes acid rain and also bronchitis, CO2 is the green house gas which increases the temperature of the earth, CO is poisionous gas which binds the heamoglobin and prevent it from carrying oxygen and cause breathing problems | |
| 45153. |
Some one is online answer my que as soon as possible |
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| 45154. |
thumre Liya brain challenge that Anushka 10 baje soti hi ABI kya thumari atma bat kar Rai hai |
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| 45155. |
happy birthday Sarah ji AAP class me top kare mujhe Aasha hai thanks |
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| 45156. |
happy birthday Sarah |
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| 45157. |
What is the second work of kidney expect filter of blood |
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Answer» re absorption of useful substance like water is answer is right comments please Nephron |
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| 45158. |
I am waiting when its about 12;00 |
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| 45159. |
Hello Aashu ji..Apko mujhse koi kaam tha?? |
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| 45160. |
What is carboxylic acid how we can identify it |
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Answer» Organic compound containing carboxyl group that is - COOH ,read ncert Listen if see cooh like ch3cooh |
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| 45161. |
Achaa Carboxylic acid kya hote hai aur use kase identify karte hai |
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Answer» C3cooh is carbocyliv acid If u see cooh group ot is carboxylic |
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| 45162. |
how to convert alcohol into acid |
| Answer» By oxidation of ethanol in the presence of kMno4 and k2cr2o7 | |
| 45163. |
Endocrine system |
| Answer» First write your question in right way ? | |
| 45164. |
What is saponification reation ? |
| Answer» It is a reaction in which ester is heated in presence of a base (mainly NaOH) to give out ethanol & ethanoic acid, this process is used in making of soap.\xa0NaOH(Sodium Hydroxide)\xa0Example: CH3COOC2H5 ----------------> CH3COOH + C2H5OH\xa0Ethyl Ethanoate Ethanoic acid Ethanol\xa0 | |
| 45165. |
Define substitution reaction |
| Answer» Reaction In which one or more hydrogen atoms of a hydrocarbon are replaced by some other atoms. | |
| 45166. |
What is buffers solution? |
| Answer» Buffer Solution is a water-solvent based solution which consists of a mixture containing a weak acid and the conjugate base of the weak acid, or a weak base and the conjugate acid of the weak base. They resist a change in pH upon dilution or upon the addition of small amounts of acid/alkali to them.The pH of Buffer Solutions shows minimal change upon the addition of a very small quantity of strong acid or strong base. They are therefore used to keep the pH at a constant value. | |
| 45167. |
Why the rate of breathing increases by 20 to 30 times during vigorous exercise? |
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Answer» Breathing rate increases because during vigrous exercise we require a large amount of energy as compaired to before so for this energy we requires a large amount of oxygen which helps in producing energy at higher rate and quickly so our breathing rate increases and we get a required amount of oxygen When we exercise, our breathing rate increases to compensate for the increased need of oxygen that is required for our body to release energy. And we breathe harder and faster because: respiratory muscles are stimulated by sympathetic nerves in order to increase the rate of breathing Saheeda nu naman Jai hind.?? |
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| 45168. |
What is emulfsification |
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Answer» Jai hind???? Breaking down of large fat globules into small and complex globules through bile juice |
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| 45169. |
Energy is needed to life processes |
| Answer» Yes | |
| 45170. |
Name two salt that are used in black and white photography |
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Answer» AgCl nd AgBr is correct Silver bromide and chloride Silver bromide and silver chloride AGBR AND AGCL |
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| 45171. |
What is the function of plecanta |
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Answer» Placenta is a disc shaped tissue in female reproductive system which helps in providing nutrition to the unborn child. Provide nourishment to baby . It is a tissue. Provide food to devloping baby and remove toxic waste of baby |
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| 45172. |
Hormone which is responsible for reabsorption of water in nephron |
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Answer» Thank u Antidiuretic hormone Antidiuretic hormone |
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| 45173. |
How to calculate least count |
| Answer» Last count/total no. Of divison .. | |
| 45174. |
what is fragmentation? |
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Answer» Ncert padh lo....??? It is a mode of asexual reproduction when a organisms simply break down into several parts or framents reproducing a new individual........ |
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| 45175. |
Electric motat |
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Answer» ??? Electric motor is a device which convert electrical energy into mechanical energy |
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| 45176. |
What is e.m.f.? |
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Answer» The amount of energy required to drive a unit positive charge through an external circuit connected to a cell is called electromotive force, or EMF. The cell is called the seat of the EMF. Electromotive force, also called emf, the unit for EMF is joule per coulomb. One joule per coulomb is equal to one volt. Hence, the unit for EMF is the volt. Electro magnetic force hai kya ?? |
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| 45177. |
Why voltmeter is not connected in series ? |
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Answer» A voltmeter is used to measure the potential difference across two point in a circuit. Since, in parallel connection the voltage in the branches remains same, and also the resistance of the voltmeter is very high due to which a very small current flow through the voltmeter. So, it is connected in parallel to measure the voltage.If connected in series the resistance of the circuit will be very high because of the high resistance of the voltmeter. As a result we will not get the correct voltage drop across the circuit. Ye wale question sirf extreme mai count haute hai Ye question. Kabhi bhi board mai ni aayega bhai Voltmeter is connected in parralel |
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| 45178. |
What is the differences between minerals and ores? (Give at least three points) |
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| Answer» | Minerals | Ores | \tAll the naturally occurring substances of metals which are present in the earth’s crust are known as Minerals.Ores are usually used to extract metals economically. A large amount of metals are present.All Minerals are not ores.All ores are minerals.Minerals are native form in which metals exist.Ores are mineral deposits.\t|
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| 45179. |
Why volume of gas is doubled the volume of water |
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Answer» Simple, density = mass/volumeInitially, let mass be M, volume be V, density be D.Initial density D = M/VAfter changing volume, new density D\' = M/2V = (M/V)*(1/2) = D/2.Density halves.A quicker way would be to see how density relates to mass, you see it as inversly proportional to density, so if you triple the volume keeping mass same, density falls to one-third. H2O when split =2 atom of H and 1 atom of O so we get the amoumt gas gas double in one beaker (H2) |
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| 45180. |
Extraction of mercury or any metal |
| Answer» Refer internet ncert is not clear ...?? | |
| 45181. |
What are the benefits of molecular movement? Give the answer in brief points. |
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Answer» Konsi book ka page ....... NCERT OR ANY OTHER REFRESHER Molecular movement maintain the structure of our cells,tissues and body so that it may not be break down due to environmental factors....agar apko aur detail chaiye to life process ka 1st pg khol kar dekh lo..... Question pheli br dekha h |
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| 45182. |
What are typical elements????? |
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Answer» Really hydrogen and helium h ky?? The elements in 3rd period are know as typical elements? ? Hydrogen and heliem Stand near the mirror and ask ur self,according to me its u Hydrogen helium may be |
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| 45183. |
Important questions of chapter 6 |
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Answer» Everything is important.. Read every part and make que |
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| 45184. |
How much marks covered by heridity and evolution chapter? |
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Answer» 9 5-8.... aa skte hain |
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| 45185. |
Name and explain mendels three laws |
| Answer» The three laws given by Mendel are:i. Law of dominance - According to this law, when a cross is made between two homozygous individuals, only one of the two characters of the pair (dominant) appears in the F1 generation. There is the appearance of both the characters in F2 generation.ii. Law of segregation - This law states that the characteristics of an organism are determined by the internal factors which occur in pairs. Only one of a pair of such factors can be present in a single gamete.iii. Law of independent assortment - This law states that in the inheritance of more than one pair of traits in a cross simultaneously, the factors responsible for each pair of traits are distributed independently to the gametes. | |
| 45186. |
Why DNA copying is necessary in reproduction? |
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Answer» DNAs are the carriers of genetic information. For an organism to produce its own kind, it becomes necessary that the offspring get similar DNAs as in parents. DNA replication is the way through which a cell makes additional copies of DNA so that they can be transferred to the offspring. This explains how DNA copying is an essential part of the process of replication. DNA copying is important for reproduction. Additional copies of DNA are made during replication which is necessary for the new cells formed after cell division. DNA replication is responsible for bringing variations. |
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| 45187. |
What are nutrel oxide and which element form |
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Answer» mrunu your answer is wrong H2O have some acidic character Non metals form neutral and acidic oxides.. 1.] These are neutral 2.] These turn litmus paper green because they have a ph of 7 . 3.] Example ...Carbon monoxide (CO) and hydrogen oxide (H2O) nuteral oxides means that they are not acidic or basic they are formed by nitrogen and carbon nitrous oxide and carbon monoxide |
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| 45188. |
Ethyl butane structure |
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Answer» Wrong question Check your question it should be 2ethyl butane |
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| 45189. |
Why the colour of pupil is black???? |
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Answer» Pupil appears black as it is a hole through which light enters our eyes.And here no reflection takes place.............. Because no light reflect there |
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| 45190. |
What is the life support system of foetus? |
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Answer» With the help of placenta Umbical cord emerges from mothers body to the foetus through placenta.....which ve villi n transport minerals to the foetus |
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| 45191. |
What are DNA copying |
| Answer» DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. DNA replication occurs in all living organisms acting as the basis for biological inheritance. | |
| 45192. |
Which metal forms amphotaric oxide |
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Answer» Zinc and aluminium Al2O3 Zn al.... Zinc.... aluminum Al |
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| 45193. |
Plz provide 2017 board exam paper |
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Answer» See in this aap only or search on Google Google it Check it in this app...... |
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| 45194. |
What would be the ratio of chromosome number between an egg and its zygote? |
| Answer» In human beings, the egg cell is haploid while the zygote is diploid in nature. There are 23 chromosomes in an egg cell and 46 chromosomes in a zygote. Therefore, the ratio of chromosome number between an egg and a zygote would be 1:2. | |
| 45195. |
What is geographical isolation Pls answer fast |
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Answer» Geographical isolation means separation of species by physical barriers like water forms, oceans, mountains etc. Geographical isolation just requires single parent. The offspring is just an exact copy of the parent. As there are less chances for variations to oocur, new species are not formed in asexually reproducing individuals undergoing geographic isolation. Actually Mr. Invisible Maine copy nhi kiya maine Google se kuch chapters ke note bana rakhe hai... Jise Maine learn kiya hai anushka you have copied it from Google Geographical isolation is a factor that affect the formation of new species. In this, biological populations of same species gets isolated from each other that obstructs the gene flow. The concentration of chemical or pesticides at every trophic level |
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| 45196. |
Reaction of soap on dirt |
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Answer» \tWhen soap is dissolved in water, its hydrophobic ends attach themselves to dirt and remove it from the cloth.\tFirst, the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of the cluster.\tThese micelles remain suspended in water like particles in a colloidal solution.\tThe various micelles present in water do not come together to form a precipitate as each micelle repels the other because of the ion-ion repulsion.\tThus, the dust particles remain trapped in micelles (which remain suspended) and are easily rinsed away with water.\t\xa0Hence, soap micelles remove dirt by dissolving it in water. Plz scroll down... Maine kl hi ye question answer kiya tha because it is long answer i am not going to type the answer open your ncert book |
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| 45197. |
Give preparation of ethanol |
| Answer» Ethanol is commercially produced using either a wet mill or dry mill process. ... The starch in the flour is converted to ethanol during the fermentation process, creating carbon dioxide and distillers grain. | |
| 45198. |
What are trans isomers ? |
| Answer» Cis trans Isomers.It is under the class of geometric isomers. It exists in alkenes.When two similar or higher priority groups are attached to the carbon on the same side, it is termed as Cis isomers and when it is attached to the opposite side. It is called Trans Isomers.. | |
| 45199. |
What are the ions present in Na2O and MgO compounds????????????? |
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Answer» Thanks whoever has given me this answer.I was confused how will I write the answer. Thanks....... The ions present in Na2O is Na^2+ and O^2- and the ions present in MgO is mg^2+ and O^2- |
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| 45200. |
Tell me the harmon name which controls blood thickness or thiness |
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Answer» Mrunu ANP Is not an hormone it is the therapy given to the polycythemiac patient the blood thickness is not controlled by any hormone vansh had written approximately right answer but polycythemia is not an hormone it is an disease in which our body makes a large amount of red blood cells which causes blood thickness Wrong Polycythemia Atrial natriuretic peptide (ANP) |
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