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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.
| 58701. |
How to draw structure s in carbon and compound |
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Answer» by using cnh2n+2,cnh2n,cnh2n-2 See ncert |
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| 58702. |
Name the process of converting vegetable oil tovegetable ghee. |
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Answer» Hydrogenation reaction Hydrogenation of oils |
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| 58703. |
Why does micelle formation take place when soap is added in water |
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Answer» When soap is added in water a cluster is formed such that the hydrophobic ends are away from the water molecules and the hydrophillic ends are towards the water molecules. This process is called micelle formation and the clusters so formed are called micelles. Because soap solution contain hydrophobic tail which stick to oil and grease particle and hydrophillic end. Due to the hydrophobic and hydrophillic end of soap molecules... |
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| 58704. |
Science ke board ka paper easy ayega kya? |
| Answer» U r right Ishita. | |
| 58705. |
Important topics of science please tell |
| Answer» Monohybrid and dihybrid cross, *** determination, double circulation, placenta, 10% law | |
| 58706. |
explain why more variations are observed in the offsprings of sexually reproductive organism |
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Answer» In sexual reproduction, two parents are involved. So, there will be two copies for each trait of which the offspring will inherit the dominant one. Therefore the offspring will be different from both the parents as it will inherit some traits from each parent.This leads to more variations in the sexually reproduced organisms. As 2 parents are involved so both the characteristics would be transferred |
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| 58707. |
Extraction of copper |
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Answer» Copper glance (Cu2S) is roasted in the presence of air. Roasting turns copper glance (ore of copper) into copper (I) oxide. Copper oxide is then heated in the absence of air. This reduces copper (I) oxide into copper metal.2Cu2S + 3O2 → 2Cu2O + 2SO22Cu2O + Cu2S → 6Cu + SO2 Low reactive matal hai toh roasting. Or u want detailed ans so see it in textbook pg 51 |
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| 58708. |
Why did mendellev chose pea plant ? |
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Answer» Your question is wrong....GJ Mendel was the scientist....the answer is ...Pea plant have 7 contrasting traits ...It is easily available ..It can be harvested whole year Short life span,having various contrasting traits,easily available.this answer would be fine for 2 marks and it is of 3 marks u have to explain a bit |
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| 58709. |
Why icecream vendor add common salt to ice.state the reason and give chemical equation. |
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Answer» For our ice cream, salt allows the temperature of the mixture around the ice cream to get colder. Since the ice cream isn’t just water, it needs to be a little below 32°F to freeze. Ice cream vendor add salt in ice because it allow the ice cream to freeze rapidly at lower temperature near about 33°f... |
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| 58710. |
contraceptive method |
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Answer» Barrier method Chemical method Surgical method Barrier method Surgical methodChemical method |
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| 58711. |
How many speciation take place ?explain briefly |
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Answer» When the genes of one population of animals differs enough from other populations of its species, that they cannot interbreed and product viable offspring. This change can take a long time and occurs through different processesFactors that lead to speciation:• Geographical isolation• Natural selection• Genetic drift• Genetic isolation Yes 4 speciation are there . Natural selection genetics drift etc |
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| 58712. |
In spore formation thread-like projection are developed on the bread. Give reason. |
| Answer» Thread-like projections are called hyphae. Clusters of branching hyphae give rise to mycelium. In sexual reproduction, one hyphae touch hyphae of another mycelium to give rise zygospore. Further zygospore develops into sporangium which gives rise to spore. | |
| 58713. |
Name the first scientist who studied the inheritance of traits from one generation to the next? |
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Answer» GEORGE MENDEL Gregor johann mendel Sir Gregor Johnny Mendal.. |
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| 58714. |
What is the functions of the plane mirror in the solar cooker? |
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Answer» A plane mirror in a solar cooker is used to direct all the rays from the sun on the mirror to a particular focus it helps the food to get cooked To trap IR Radiation which are responsible for heating effect. To reflect the sun light on food article and provide heat. To reflect the light rays |
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| 58715. |
List two advantage for organisms to reproduse themselves through spores. |
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Answer» They are covered by the thick wall which protect them until they come in contact with environment and begin to grow Spores are covered by thick wall which ptotects them from the unfavourable condition They are light in weight .Easy to reproduce.It is faster mode pf reproduction |
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| 58716. |
Why is red color selected for changer signal lights |
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Answer» Because it is scattered least by the air particles due to its largest wavelength and can be seen from a large distance by same brightness.. Density and wavelength jyada hai |
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| 58717. |
Why does distelled water nit conduct electricity |
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Answer» Distilled water which is a pure form of water, is neither acidic nor basic in nature. So distilled water does not dissociate into ions. Since, conduction of electricity requires free ions so, distilled water does not conduct electricity. Because distilled water doesn\'t contain ions.. Bcoz it is pure form of water therefore it doesnot conduct any ion hence it dies not conduct electricity |
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| 58718. |
Explain electro refining of copper with the help of experiment? |
| Answer» | |
| 58719. |
define contraception |
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Answer» Thanx for your advice ashutosh Your most welcome I think you will bring 95 in board Bhai tu to wahi puch only all surgeries method barrier method etc Hi mate here is ur answerContraception means birth controlling methods are called contraception methodsSome of the contraceptive methods⭐vasectomy⭐Tubectomy⭐Copper-T⭐Condoms.⭐Diaphram for women⭐spermicides⭐foamicidesThese are the barrier methods to stop pregnancy Any device or chemical or drug which prevents pregnancy is called contraception.Hope it helps:-) |
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| 58720. |
D/B regeneration and fragmentation. |
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Answer» Regeneration: if organism somehow cut or broken into pieces then each piece will developed into new organismExample: planaria and hydra Fragmentation: it break in small pieces upon maturation bd each piece develops into new oneExample:spirogyra FRAGMENTATION:-1: fragmentation occurs in multi-cellular organisms with simple body\xa0organization.2: in fragmentation an organism breaks into pieces and each pieces develops into a new individual .\xa03: no specialized cells are involved in fragmentation .REGENERATION:-1: regeneration occurs in fully\xa0differentiated\xa0multi-cellular organism with complex body organization.2: in regeneration organism breaks into pieces and the pieces may or may not group up in to a new individual .3:\xa0In regeneration,\xa0specialized\xa0cells proliferate and form a mass of cells. The cells\xa0from the mass differentiate to form different cells types and tissues. i hope it helps..............................^_^ |
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| 58721. |
Write the name of the parasite which causes malaria disease? |
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Answer» Mosquito nahi hain kyaaa...??? Plasmodium Plasmodium |
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| 58722. |
Oxygen suppies to brain |
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| 58723. |
State Snell\'s law of refraction |
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Answer» Thanx to all Snell\'s law\xa0(also known as\xa0Snell–Descartes\xa0law\xa0and the\xa0law of refraction) is a formula used to describe the relationship between the angles of incidence and\xa0refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air. The ratio of sin of angle of incidence to the sin of angle of refraction is a constant for the light of a given colour and for the given pair of media. 2nd law of refraction, it says that ratio of sin of angle of incidence to sin of angle of refraction is constant for a given pair of media The Sine of angle of refraction to the Sine of angle of incidence is constant to the given pair of media. |
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| 58724. |
State any three advantages of charcoal over wood |
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Answer» Ok Ashutosh ji fine ?? Are koi nhi chetna ji help krne k bad thanx bolna jayajhai The advantages of using charcoal over wood:1) Charcoal has a low ignition temperature\xa0or kindling point as compared to wood.2) Charcoal produces less smoke than wood.3) Charcoal has a higher calorific value than wood. Thanks chetna ➡️Charcoal has high calorific value than wood .➡️Charcoal is more compact than wood it is easy to transport also. ➡️Charcoal is less polluting than wood it releases less harmful gases. |
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| 58725. |
What is the difference between valence electron and valency of an element discuss with an example |
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Answer» Valency is the electron that the atom or molecule requires to accept or donate to other atom .But valence electrons are the number of electron in the outermost shell.For example Na=(2,8,1) So Valence electron is 1 so Na will donate its 1 e- to complete its octet therefore its valency is 1 whereas S=(2,8,6) here valence electrons are 6 but it needs 2 more to make it 8 and complete octet therefore valency is 2 So valence e-= No.of e- in last shell and Valency = No. Of e- donated or accepted to complete its octet.HOPE IT HELPS:-) Take an element say chlorine atomic no. is 17, and EC will be 2,8,7, here 7 is valence electrons (electrons in the last shell) and 8-7=1 is the valency( electron needed to complete the octet) hope it helps u |
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| 58726. |
ALL THE BEST FOR YOUR TOMORROW SCIENCE EXAM |
| Answer» Thanks and same 2 u | |
| 58727. |
Why nickel is used as catalyst |
| Answer» Because it helps to perform a reaction fast or quickly | |
| 58728. |
Incident ray llel to emergent in glass slab |
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Answer» Yes It will deflect |
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| 58729. |
Please anyone tell me the derivation of ohms law |
| Answer» | |
| 58730. |
Length of neuron |
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Answer» Aprox . 9m Approx near about 1 metre |
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| 58731. |
Why should the students put the leaf peel in the water twice during the whole experiment?? |
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Answer» ? ? ? ? Ye experiment ncert wala hai..kya |
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| 58732. |
bleaching powder other name |
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Answer» Ishit paii y hypochloride kya hota h...???...lagta h chloride hyper ho gyi h..? Calcium hypochoride Calcium oxychloride Calcium oxychloride.. Calcium oxichloride. |
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| 58733. |
List the factors on which the angle of deviation through a prism depends. |
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Answer» If refractive index is more the angle of deviation also will be more It depends on refractive index of prism |
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| 58734. |
What r isomers |
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Answer» The phenomenon of exhibiting different physical and chemical properties even though having same molecular formula is called isomerism and the molecules showing isomerism are called isomers.Isomers are organic compounds which have the same molecular formula but different structural formula.Features of Isomers:1. They have same molecular formula2. They have different structural formula.3. They vary in their chemical properties.4. They have different boiling and melting points. Similar chemical formula different structure. have same chemical formula but different structures Molecules having similar formula but different structures... |
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| 58735. |
The exit of waste material is regulated by which organ in human body. |
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Answer» Patani yha par type kyun ni ho rha...??...par ncert m dekho..pg 100 par last para before dental caries.. **** **** sphincter.. \tThe unabsorbed food is sent into the large intestine where more villi absorb water from this material.\tThe rest of the material is removed from the body via the ****.\tThe exit of this waste material is regulated by the **** sphincter. |
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| 58736. |
difference between chemical properties of metals and non metals |
| Answer» \tMetalsNon-MetalsMetals form basic oxides.Non-metals form acidic oxides or neutral oxidesMetals displace hydrogen from water (or steam).Non-metals do not react with water (or steam)Metals displace hydrogen from dilute acids.Non-metals do not react with dilute acidsMetals form ionic chlorides with chlorine.Non-metals form covalent chlorides with chlorine,Metals usually do not combine with hydrogen. Only a few reactive metals combine with hydrogen to form ionic metal hydrides.Non- metals react with hydrogen to form stable, covalent hydrides.\t | |
| 58737. |
Properties of modern periodic table |
| Answer» properties of elements are periodic function of their atomic number vertical colunms known as group18horizontal rows known as periods 7elements has electronic confrigation | |
| 58738. |
What are the Features in modern periodic table |
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Answer» All the best aap sab ko kal k exam k liye ☺️ ........ Groups & periods |
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| 58739. |
Why the sky is blue. Explain |
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Answer» Thanx preethi The blue colour of the sky is caused by the scattering of sunlight off the molecules of the atmosphere this scattering called rayleigh scattering is more effective at short wavelength therefore the light scattered down to the earth at a large angle with respect to the direction of Sunlight is predominantly in the blue end of the spectrum Shorter wavelength and more scattering capacity |
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| 58740. |
Why advance sunrise and delayed sunset.explain |
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Answer» Due to refraction of light ? due to atmospheric refraction we see sun 2 min before actual sunrise and 2 min after sunset Simple |
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| 58741. |
10% law |
| Answer» Only 10percent of energy entering a particular trophic level of org. is available for transfer to next higher trophic level | |
| 58742. |
Best of luck everyoneAaram se exam dena |
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Answer» Thanxxxx and same to you.....? ya |
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| 58743. |
Detail ester |
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Answer» \tEsters are sweet-smelling substances and used for various purposes like in perfumes and also used as flavouring agents.\tReaction of ester with sodium hydroxide, results in the conversion of ester to alcohol and sodium salt of carboxylic acid. Sweet smelling substance formed by the reaction ethanol and ethanoic acid |
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| 58744. |
What is phone number |
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Answer» Whose A number which contain 10 digits 9695339490 any problem discuse |
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| 58745. |
Can i see class 10 science lab manual pdf 2018-2019 |
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Answer» Yrr google par h Achha lab manual maine theek se nhi pda ??????????????? Practical file nhi bnai kya( sry agar bura lga to) |
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| 58746. |
Experiment to study the scattering of light |
| Answer» Tyndall effect | |
| 58747. |
What is proferative phase during menstrual cycle |
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Answer» \tDuring proliferative phase, the ovum matures and becomes Graafian follicle.\tOestrogen production is increased.\tOestrogen stimulates the thickening of the uterine endometrium to prepare it for the implantation of the embryo in future. No idea |
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| 58748. |
How the use of synthetic detergents causes pollution of water? |
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Answer» Detergents are non biodegradable so are polluting As it is non biodredable |
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| 58749. |
How do regeneration is different from reproduction? |
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Answer» & give their example also In this question define reproduction and regeneration |
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| 58750. |
Sodium high reactive metal |
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Answer» I don\'t know it\'s correct or not If you can tell me the proper question then I can give you the proper answer In reactivity series potassium is highly reactive metal than sodium Tell me the proper question |
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