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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.
| 44301. |
Sodium hydroxide solution mix zinc granules |
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Answer» 2NaOH+Zn = Na2ZnO2 +H2 Sodium zincate is formed |
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| 44302. |
How washing soda is prepared from baking soda ??.. |
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Answer» When baking soda is heated give sodium carbonate , water , and carbon dioxide. That sodium carbonate react with 10 water molecule to give washing soda. Na2co3 + 10h20----> Na2Co3.10H2o |
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| 44303. |
Why use condoms |
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Answer» To reduce polpulation And they are also use control population... Yes |
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| 44304. |
Describe the principle and functions of electric generator and write its component. |
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Answer» It works on the principle of electromagnetic induction........its components are armature,slip ring, Magnets, Principles . Right hand rules ,slip rings , armature |
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| 44305. |
Lab based questions |
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| 44306. |
Functions of CNS, PNS and ANS |
| Answer» | |
| 44307. |
How to 80/80 |
| Answer» | |
| 44308. |
U have an element x which is a yellow Which compound is yellow in colour?? |
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Answer» Yeah its sulphur but how u know? Ferrous sulphate Might be sulphur |
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| 44309. |
Vinegar contains which acid? |
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Answer» Acetic acid Ethanoic acid CH3COOH Ethanoic acid Acetic acid |
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| 44310. |
What lesson did we get from movie"Shawshank redemption" |
| Answer» | |
| 44311. |
Short circuit and overloading |
| Answer» If live wire touches the neutral wire somehow the phenomenon of touching live wire and neutral wire is called shortcircuit when two such wire came in conact of each other then resistance of the circuit is formed is small that a large quantity of current flows through it | |
| 44312. |
Washing soda? |
| Answer» Na2co3.10h2o | |
| 44313. |
What is gene? And how it show a trait. |
| Answer» Samallest unit of DNA | |
| 44314. |
What is halogence |
| Answer» Fluroine cl br I are halogens | |
| 44315. |
Important pratical questions |
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Answer» Labmanual ke viva ques karlena Jo pratical hua hey school meyWahi sy ay ga 23rd ko 1.35 pr bta dunga |
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| 44316. |
define all the terms of chemical reactions and equations |
| Answer» Chemical reaction are the processes in which new substance or compound is formed with new properties.Only rearrangement of atoms take place. And the method of representing chemical equation with the help of symbols and formulae is called chemical equation. | |
| 44317. |
What is a coliform |
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Answer» A group of bacteria found in human intestine. Coliform is a group of bacteria...present in human intestine...whose presence in water indicates contamination by disease causing microorganisms.... Coloform is bactetia presnt in H²0 |
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| 44318. |
Friends care fully chat karo q kiKai log apka name sy id bana ky chat kr rahy hey Careful about this |
| Answer» True.... | |
| 44319. |
Explain slag and gangue... |
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Answer» Rocky and earthy impurities present in ore ia called gangueSlag is a waste material separated from metal during smelting.... Pata nhiTum explain karo |
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| 44320. |
What is monohybrid and dihybrid cross |
| Answer» When only one trait of two organisms of same species is crossed it is known as monohybrid cross.Whereas when the cross is made between two different traits of a species together it is know as dihybrid cross | |
| 44321. |
Why is the colour of the sky blue? |
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Answer» \t\xa0The blue colour of the sky is due to the scattering of the sunlight by the molecules present in the atmosphere.\tThe molecules of air, such as N2\xa0and O2, have sizes smaller than the wavelength of visible light. These\xa0molecules absorb some amount of sunlight and re-emit it, as sunlight passes through the atmosphere.\tBlue light of shorter wavelength is scattered more strongly than red light of longer wavelength. This scattered light contains blue light in a larger proportion and it enters our eyes.\xa0That is why the sky appears blue. Dut to atmospheric refraction |
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| 44322. |
What is the focal length(f) of concave lens .why? |
| Answer» Incomplete question h saayad... Are you asking about it\'s sign convention...?? | |
| 44323. |
why There is a need of classification of elements |
| Answer» For easy understandings about the elements... | |
| 44324. |
Now my turn... I\'m going to ask..What is double refraction...? |
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Answer» Division of a single light ray into 2... When a single beam of lyt splits due to edge of a material and moves in two directions ,then it is |
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| 44325. |
What is the effect of recycling on environment ? |
| Answer» Lot of energy is required for recycling. | |
| 44326. |
write 4 to 5 advantages of disposable paper cups over disposable plastic cups... urgent plz |
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Answer» ok thanku . plz don\'t ans. this question again if i post it again. i want some other points too. Thanku plastic may melt due to heat where as paper will not Dont cause pollution Biodegradable |
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| 44327. |
Define endocrine glands with some examples? |
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Answer» I am not satisfied. Example - pituitary gland, thyroid gland, thymus gland, adrenal gland They are ductless They secrete hormones The secretion are poured into blood |
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| 44328. |
Name the type of gene which decides the appearance of an organism |
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Answer» Same here.. Dominant Q2 |
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| 44329. |
How speciation occurs? |
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Answer» ✔️This speciation phenomenon most commonly occurs through polyploidy, in which an offspring or group of offspring will be produced with twice the normal number of chromosomes.➡️ Explanation: Speciation occurs when two or more populations become so genetically distinct that they no longer interbreed with one another. There are multiple ways this can occur. The natural ways speciation can occur are allopatric, parapatric, and sympatric speciation.➡️ Speciation is the evolutionary process by which populations evolve to become distinct species.➡️ This is called allopatric speciation. There are four types of speciation: allopatric, peripatric, parapatric, and sympatric and artificial. Specition occurz due toGeographical isolationNatural selectionGenetic drift |
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| 44330. |
advantages of nucear energy |
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Answer» Advantages of nuclear energy are :-1) This energy do not cause global warming as it do not release Co22) In this we can generate a lot amount of energy by even small amount of radioactive material 3) In this we do not require to put radioactive again and again. Three advantages of nuclear energy are:1.Tremendous amount of energy produced: nuclear energy produces a large amount of useful energy from a very small amount nuclear fuel (Uranium, Plutonium,Thorium). The Fission of an atom of Uranium produces 10 million times the energy produced the combustion of an atom of carbon from coal.2. Energy supply energy supply: once the nuclear fuel like uranium 235 is loaded into the reactor, the nuclear power plant can go on producing electricity for 2 to 3 years or for a long span of time at a stretch. There is no need for putting in nuclear fuel again and again.3. Pollutant gases: nuclear fuel does not produce pollutant gases like carbon dioxide so it contribute to the greenhouse effect. It also does not produce Sulphur Dioxide so it does not cause acid rain. Large amount of energy can be obtained from small amount of reactor |
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| 44331. |
Hi guys wese lab manual kese krni h??? |
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Answer» Harsi paai itni sari activity kon pdega vo bhi ek din pehle Bas read krlo questions ko...and har activity ka basic cleat hona chaiye... |
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| 44332. |
why double circulation is nessasary in human beings |
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Answer» Bcoz mammals ko jyada oxygen ki jarurat hoti hai to do work aur double circulation se blood jaldi oxygenated hota hai.... Double circulation is necessary in human beings in order to avoid mixing of oxygenated and deoxygenated blood which makes the circulatory system more efficient and helps in maintaining a constant body temperature. Bcoz we need to maintain body temperature... For the purification of blood....?? |
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| 44333. |
Why tarnished copper vessels beign cleaned with lemon or tamarind juice? |
| Answer» Copper reacts with moist carbon dioxide in air to form copper carbonate and as a result, copper vessel loses its shiny brown surface forming a green layer of copper carbonate. The citric acid present in the lemon or tamarind neutralises the basis copper carbonate and dissolves the layer. That is why, tarnished copper vessels are cleaned with lemon or tamarind juice to give the surface of the copper vessel its characteristic lustre. | |
| 44334. |
Give reason why titanium is a strategic metal |
| Answer» Titanium\xa0is called\xa0strategic metal\xa0as it can be used in producing space craft , aircraft and missiles. It is the fourth most abundant\xa0metal\xa0on the earth. Since it is resistant to salt water and acid corrosion it is used in making durable corrosion resistant alloys. | |
| 44335. |
Acidic nature of a substance is due to.................. |
| Answer» Presence of H+ Ions. | |
| 44336. |
Kiccha kya hi |
| Answer» Sudeep | |
| 44337. |
Why ammeter is connected in series?Why voltmeter is connected in parallel? |
| Answer» Ammeter: In series connection, the same current flows through all the components. Ammeter aims at measuring the current flowing through the circuit and hence, it is connected in series: so that the same current that is there in the circuit flows through it and gets measured.Ammeter has a low resistance, because we do not want to change the current that is flowing through the circuit.Voltmeter:\xa0A voltmeter measures voltage change between two points in a circuit. So u have to place the meter probes at these two points, without removing the portion of circuit between the probes (or else you change the circuit). This then, by definition, places the voltmeter in parallel with the section of circuit between the probes.When you place the meter probes at the two points you want to measure, a tiny portion of the current in the circuit will now go thru the meter and give you a reading. We make the voltmeter a very high resistance instrument. So when the current splits into the meter the high resistance allows only a tiny amount of original current to split into the meter | |
| 44338. |
why dry HCl do not react with litmus paper |
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Answer» Bc. it doesn\'t contain H+ions Because H+ ions are nt formd |
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| 44339. |
Transport of food in plant require living tissues and energy. Justify the statement |
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Answer» The food in the leaves is transported to all parts of the plant that\'s why\xa0it needs living tissues and energy\xa0for transportation.The vascular tissue that transports food is called phloem. Phloem is present along with the xylem inside the plant body. Food is transported by phloem at the expense of ATP. as phloem is largely composed of living cells thus,it shows that food transport requires living tissue and energy |
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| 44340. |
How was your maths paper and which set u got |
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Answer» I also get 2nd and it was easy and excellent ? but set 2 k lie time kam pd gya tha 2 It was good and i got 3rd set Set 1 |
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| 44341. |
Give experiment to show ohms law |
| Answer» Procedure :Draw the circuit diagram as shown above.Arrange the apparatus as per the circuit diagram.Clean the ends of the connecting wires with sand paper and make them shiny.Make the connections as per circuit diagram. All connections must be neat and tight. Take care to connect the ammeter and voltmeter with their correct polarity. (+ve to +ve and -ve to -ve).Determine the zero error and least count of the ammeter and voltmeter and record them.Adjust the rheostat to pass a low current.Insert the key K and slide the rheostat contact to see whether the ammeter and voltmeter are showing deflections properly.Adjust the rheostat to get a small deflection in ammeter and voltmeter.Record the readings of the ammeter and voltmeter.Take atleast six sets of readings by adjusting the rheostat gradually.Plot a graph with\xa0Valong x-axis and\xa0Ialong y-axis.The graph will be a straight line which verifies Ohm\'s law.Determine the slope of the V-I graph. The reciprocal of the slope gives resistance of the wire. | |
| 44342. |
Explaine female reproductive system |
| Answer» Hamari to text book laapata hai | |
| 44343. |
Explaine human female reproductive system |
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Answer» Female reproductive system in human beings:\t1. Ovarieso Two ovaries are present in the pelvic cavity, one on each side of the uterus.o Ovaries produce ova which are female gametes.o One ovum is released by one ovary every month.o Ovaries also secrete female hormones, oestrogen and progesterone.o Both the hormones are responsible for the changes in the female body at the time of puberty.2. Oviducts(Fallopian tube)o Two oviducts or fallopian tubes are present. Each close to one ovary.o The end of the oviduct is broad and has many finger-like projections.o When the egg is released by the ovary, it passes down to the uterus through the oviduct.3. Uterus(Womb)o It’s a hollow, pear-shaped, muscular organ.o The inner lining of the uterus called endothelium protects and nourishes the developing embryo.4. ****** (Birth canal)o The uterus opens into the ******.o The ****** is a muscular, narrow tube.5. Vulvao ****** and urethra both open into the vulva. \xa0 \t
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| 44344. |
D/f alveoli and nepron |
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Answer» Alveoli have thin walled ballon like structure,its surface is fine and delicate and nephron have thin walled cup shaped structure attached with thin walled tubule Alveoli is the structural and functional unit of lungs and is involved in respiratory process.Whereas, Nephrons structural and functional unit of kidney and is responsible for urine formation. |
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| 44345. |
Why are valves present in hearts and vein? |
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Answer» R=d War direction Blood donot flow back Please tell |
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| 44346. |
What is the difference between iron 2nd and 3rd |
| Answer» Diff bas itna h ki fe 2nd 2 electrons loose krta h and fe 3rg 3 electrons loose krta h... | |
| 44347. |
What happens to the crystals of washing soda when exposed to air . |
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Answer» It will go under effloresence. Thanx guys vv thanx Washing soda gets converted into soda ash (Na2CO3) due to disapperance of water of crystallisation (.10H2O) They lose their water of crystallization and turns into white powder. Water of crystallization evaporates and crystals change into powder having formula Na2CO3.. |
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| 44348. |
How does an electric fuse work? |
| Answer» An electric fuse is a safety device used to limit the current in an electric circuit. The use of a fuse is to safeguard the electric circuit and the electric appliances connected in the electric circuit from being damaged.\xa0A fuse is a short piece of wire made up of a material of high resistivity and of low melting point, So that it may easily melt due to overheating due to the excessive flow of electric current.The thickness of the fuse wire is different in different fuses depending on the amount of current which is permitted to flow through them. Generally an alloy of tin and lead is used as the material of the fuse wire as it has high resistivity and low melting point.\xa0Usually the fuse wire is a thin wire to be the resistance of the fuse wire is much more than that of the live wire. | |
| 44349. |
Why the danger signal light is red |
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Answer» Among the colours of visible light, red has more wavelength and least scattered. Thus, red colour can easily go through fog or mist or smoke without getting scattered. It can be seen from long distance. So, red colour is used in universal danger signal. The color red has the maximum wavelength among any other color. Because of this it does not gets scattered away like other colours such as blue, violet etc due to particles present in the atmosphere. Hence it is clearly visible even in a foggy weather from a considerable distance. Therefore danger signals are red in color Red light scattered least the atmosphere. Therefore it can travel larger distance with appernceabke intensity.. Because red colour have highest wavelength and it is leastscattered by fog and smoke Because it is danger Bcoz red colour gets scattered the least due to longer wavelength...... so it would be visible even from a longer distance... |
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| 44350. |
What are mettalic oxides |
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Answer» Who is right..? Oxides which are formed when a metal reacts with oxygen are called metallic oxides....they are basic in nature.. |
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