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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.
| 56251. |
What is molar concentration in ph value |
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| 56252. |
What happens in reflex action? |
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Answer» whose angle which is grater then 180\' Any sudden response taken by spinal cord or any quick response to stimuli |
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| 56253. |
Is magnetic field patterns depend on shape of conductor |
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| 56254. |
What is the full form of DNA ?️ |
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Answer» It\'s full is Deoxy ribo nucleic acid Deoxy_ribo_nucleic acid |
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| 56255. |
Aksjxbxjix |
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Answer» WTF What is this ? |
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| 56256. |
How a sperm and women\'s egg came in contact?? |
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Answer» What is mating bro During mating |
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| 56257. |
What do you mean by power of lens |
| Answer» The ability of a lens to converge or diverge light rays depends on its focal length. It is represented by the letter P. The SI unit of power of a lens is ‘dioptre’. It is denoted by the letter D. If f is expressed in metres, then, power is expressed in dioptres.\xa0Example : A convex lens of short focal length bends the light rays through large angles, by focussing them closer to the optical centre.\xa0Concave lens of very short focal length causes higher divergence than the one with longer focal length. The degree of convergence or divergence of light rays achieved by a lens is expressed in terms of its power. | |
| 56258. |
Why addition reaction occurs only in unsaturated hydrocarbons |
| Answer» \xa0Unsaturated compounds undergo addition reactions because of the presence of pi bond.\xa0The electron charge cloud of the pi bond is placed above and below the plane of the bonding atom.This result in the easy availability of the electrons in the unsaturated compounds compared to the saturated compound where two atoms are bonded by the sigma bond .sigma bond which is formed at the internuclear axis in between the two bonded atom is very strong. Thus pi electrons provide a better site for the attacking species. | |
| 56259. |
How is Budding in unicellular organisms different from Binary fission ? |
| Answer» In case of binary fission, the unicellular organism divides by cell division to give rise to two equal and similar offspring. In case of budding, the organism produces a small bud which gradually grows in size and then separates from the parent. | |
| 56260. |
How many types of asexual reproduction are practiced by a Hydra and what are they? |
| Answer» Hey Anish here\'s your answer ...............Hydra exhibit a form of asexual reproduction called budding. In this form of asexual reproduction, an offspring grows out of the body of the parent. In most instances, the budding is restricted to certain specialized areas. In some other limited cases, buds may come from any number of places on the body of the parent. The offspring typically remain attached to the parent until it is mature........ hope this will surely help you ☺✌✌✌ | |
| 56261. |
Why is conversion of ethanol into ethanoic acid an oxidation reaction?? |
| Answer» The conversion of ethanol to ethanoic acid called an oxidation reactionOxidation: Addition of oxygen is called oxidation.Let\'s see the equation,CH3-CH2-OH\xa0Alkaline KMnO4→ CH3-COOHIn the above equation the number of oxygen atoms in product molecule is greater than the number of oxygen atoms present in reactant molecules.During the conversion of ethanol to ethanoic acid 1 oxygen atom is added to the ethanol to convert ethanoic acid. Addition of oxygen is nothing but oxidation. Hence, the conversion of ethanol to ethanoic acid called an oxidation reaction | |
| 56262. |
Why the sun look like red |
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Answer» During morning or evening the sun appears to be red because during this period the rays have to travel a long distance through horizen and during this rays having less wavelength are scattered like violet blue and rays having long wavelength do not scatters like red which finally enters in our eye and we see sun in red colour during sunset and sunrise.Thanks The sun is look like a red big ball due to the scattering of red light and there are two gases are present in sun ;Hydrogen and Helium. When they are fused, then red or orange will scattered in universe. Because the light which come to us is of longer wavelength hence it appears red or orange |
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| 56263. |
Name the animal which is regenerate fully from its cut body parts |
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Answer» Planaria hydra and planarian |
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| 56264. |
Activity 12.1 not understand in science class 10 |
| Answer» Self study | |
| 56265. |
Plz tell me briefly how to many paragraph to take to write long answer questions |
| Answer» To readin | |
| 56266. |
What is solar constant.? |
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| 56267. |
Why sodium kept immersed in kerosene |
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Answer» 1) Sodium is a vry high reactive metal.2) if it kept in opn it reacts with oxygen and explosive heat reaction occurs.3) this reaction producs a large nmbr of heat and enrgy which may lead to loss...and dmage.4) to prevnt such reaction we kept sodium in kerosine.5) kerosene prevent oxygen to react with sodium. Sodium and potassium are very reactive metals and and combine explosively with air as well as water. Hence, they catch fire if kept in open. Therefore, to prevent accidental fires and accidents, sodium is stored in kerosene oil. |
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| 56268. |
how do we produce hydrogen gas in lab |
| Answer» Laboratory preparation of hydrogen:When granulated zinc is reacted with a dilute hydrochloric acid, hydrogen is obtained. This is the most common procedure of producing hydrogen. We can also prepare hydrogen by reacting zinc with aqueous alkali. The following reaction will make this clear:Zn + 2NaOH → Na2ZnO2 + H2 | |
| 56269. |
Potassium iodide +bromine |
| Answer» They undergo a displacement reaction where a more reactive halogen in this case bromine displaces an iodide from its salt.Br2(l) + 2 KI(aq) → 2 KBr(aq) + I2In this reaction, the solution will have a slight change in color to a different shade of Brown since Bromine and Iodine solution are both in a different shade of brown. | |
| 56270. |
What is the deliquesent nature |
| Answer» Deliquescence, the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. Deliquescence occurs when the vapour pressure of the solution that is formed is less than the partial pressure of water vapour in the air. All soluble salts will deliquesce if the air is sufficiently humid. A substance that absorbs moisture from the air but not necessarily to the point of dissolution is called hygroscopic. | |
| 56271. |
What are importance of varitions |
| Answer» • Niches can change due to reasons beyond the control of the organisms. For example, temperature on earth can go up or down, water levels can vary orthere could be meteorite hits.• If a population of reproducing organisms was suited to a particular niche and the niche was drastically altered, the population could be wiped out.• However, if some variations were to be present in a few individuals in these populations, they would be able to resist the drastic changes there and survive to reproduce further.• Therefore, variation is beneficial for the maintenance of body design features that allow the organism to use a particular niche in the ecosystem.• Variations can be beneficial or harmful to an individual organism but they increase the survival chance of a species over time.• Variation is the raw material for evolution because successful variations suitable for the particular niche are selected by nature.• Reproduction is therefore linked to the stability of the populations of species. | |
| 56272. |
What is acquired trait. |
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Answer» Acquired traits are those traits which acquire after the birth. Like asloss of body parts Acquired traits as the name says are acquired by the individual during its life time. Acquired traits are due to changes in the life style, injury, loss of body parts, disuse of some body parts. These are the traits which occur in the somatic cells. Changes in the somatic cells are not passed on to the offspring belonging to next generation. |
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| 56273. |
How reproduction takes place in plants? |
| Answer» Sexual reproduction in plants produces offsprings by the fusion of gametes resulting in offspring genetically different from the parent whereas Asexual reproduction produces new individuals without a fusion of gametes ,genetically identical to the parent plant and each other ........ hope this will surely help you ☺✌✌✌ | |
| 56274. |
Explain some changes seen in boys during puberty.? |
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Answer» Low pitch soundGrowth of hairBroadening of shouldersHair on face like beard moustache Hairs grow in pubic region.shoulder become broader deepening in voicebroaden of shoulderformation of sperm began in testesgrowth of hair underarm and in genital areas Releases hormone called testestrone and acne , hard voice , beard |
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| 56275. |
What are trophic levels with explanation |
| Answer» The\xa0various levels or steps in a food chain are called trophic levels. They represent the successive stages of nourishment like primary producer, primary consumer, secondary consumer, tertiary consumer etc. The autotrophs are at the first trophic level. | |
| 56276. |
What do you mean by calcination |
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Answer» Okayy.. from where are u Its completely fine ..... your welcome ☺ Thqq Aastha ji The process in which the carbonate ores are oxidised to remove impurities from ore in absence of oxygen to remove carbon dioxide from it\'s carbonate (C03)..... Hope it will help u !!!!! |
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| 56277. |
What is the basic cause behind all fundamental forces |
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| 56278. |
The pH of a coldirnk is 5. What will be action on blue and red litmus solution |
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Answer» According to PH scale .The PH of coldrink 5 it shows the acidic nature of the coldrink so as we know that if blue litmus is dipped in acid then it change blue colour to red colour. Coldrink change blue litmus to red |
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| 56279. |
What types of bond is present in cl2......????? |
| Answer» Single covalent bond | |
| 56280. |
Differentiate between roastiNg and calcination |
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Answer» Calcination-in which ore are converted into its oxides in the absence of oxygen is known as calcination. Roasting-. ". ". ". In the presance of oxygen Roasting*used for sulphide ores*done is presence of airCalcination*used for carbonate ore*done in absence of air |
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| 56281. |
What happen if element x react with metal y to give metal oxide what is element x and y name |
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Answer» X is a metal and Y is a oxygen so this reaction gives us metaloxide. X=metal and Y=oxygen.When metal react"s with oxygen than it form metaloxide. X =CaO and Y=H2O |
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| 56282. |
How the division in chromosome takes place |
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| 56283. |
Explain corrosion and prevention of corrosion |
| Answer» The wasting away of metal with passage of time by formation of their compounds with atmospheric gases is called as corrosion. Its prevention are÷1.By painting and greceing. 2.By alloying i.e.making alloys. | |
| 56284. |
Who was the scientists of light |
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Answer» Romar James clerk |
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| 56285. |
Name one process by which sulphide purified |
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Answer» Roasting process Roasting ☺ Roasting Roasting roasting÷ by roasting sulphide ore are purifide and then reduced by any reducing agent to form pure metal. Roasting |
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| 56286. |
Structure of soap |
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| 56287. |
List any four advantages of water harvesting. |
| Answer» Saved water can be used for drinking. Water can be used for irrigation...Saved water can be used in water scarcity.. | |
| 56288. |
State two changes you can make in your habits to reduce the consumption of electricity or water. |
| Answer» Turn off the electric appliances when not in use... Keep the tapes off while brushing.. Do not use shower while bathing..... | |
| 56289. |
how do acids forms |
| Answer» Acid can be formed naturally as well as artificially in the labs | |
| 56290. |
what is the formulq for hexane |
| Answer» C6H14 Name of this compound is hexane.Structural formula of hexane can also be written as CH3CH2CH2CH2CH2CH3 or CH3 − CH2 − CH2 − CH2 − CH2 − CH3 | |
| 56291. |
What is tidal energy? I need a proper defination |
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Answer» Aditi choudhery u r fb id Thanks The energy which is generated by tides in the ocean.... |
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| 56292. |
Write the process involved in formation of rainbow. |
| Answer» Atmospheric refraction | |
| 56293. |
Differentiate between concave mirror and convex mirror |
| Answer» \tConcave mirrorConvex mirror\t\tIf inner side of spherical mirror is reflecting, it is called as concave mirror.If outer side of the spherical mirror is reflecting, it is called as convex mirror.Concave mirrors form real and inverted images.Convex mirrors form virtual and erect images.The images formed by the concave mirrors are magnified in nature.The images formed by the convex mirrors are diminished in nature.The object in the image formed by the concave mirror look bigger than the original size of the object.The object in the image formed by the convex mirror look smaller than the original size of the object.Concave mirrors form real and inverted images except when the object is between pole and focus.Convex mirrors form virtual and erect images irrespecive of the position of the object.\t | |
| 56294. |
Define reflex arc |
| Answer» The pathway taken by the nerve impulse in reflex action is called reflex arc | |
| 56295. |
What is potential difference and electric potential |
| Answer» The electric potential is defined as the amount of work done to carry a unit charge from one point to another in an electric field and the potential difference is defined as the difference in the electric potential of the two charged bodies . | |
| 56296. |
Define double fertilisation? |
| Answer» Double fertilisation is a complex fertilisation mechanism of flowering plants (angiosperms).This process involoves the joining of a female gametophyte (megagametophyte this is also called the embryo sac) with two male gametes (sperms). | |
| 56297. |
Disadvantage of vegetation propagation |
| Answer» 1. The plants gradually lose their vigour as there is no genetic variation. They are more prone to diseases that are specific to the species. This can result in the destruction of an entire crop.2. Since many plants are produced, it results in overcrowding and lack of nutrients.3. Vegetative propagation becomes a hindrance in the evolution of new cultivators.4. Although the asexually produced plants are precocious in bearing, but these have short life period than the sexually produced ones.5. The size is small in vegetatively produced plants hence the dead wood can fetch little price than the huge seedling trees. | |
| 56298. |
What what are the two theories of light |
| Answer» Wave and particle theory. | |
| 56299. |
How drone are flying in the air explain |
| Answer» A typical unmanned aircraft is made of light composite materials to reduce weight and increase maneuverability. This composite material strength allows military drones to cruise at extremely high altitudes.Drones are equipped with different state of the art technology such as infra-red cameras (military UAV), GPS and laser (military UAV). Drones are controlled by remote control system also sometimes referred to as a ground cockpit.An unmanned aerial vehicle system has two parts, the drone itself and the control system.\xa0The nose of the unmanned aerial vehicle is where all the sensors and navigational systems are present. The rest of the body is full of drone technology systems since there is no need for space to accommodate humans. The engineering materials used to build the drone are highly complex composites which can absorb vibration which decreases the noise produced\xa0and also light weight. | |
| 56300. |
Plz explain meiosis and mytosis |
| Answer» Mitosis or the non reproductive cell division involves division of cell which are not associated with reproduction i.e..,non reproductive cells and meiosis involve division of reproductive cells | |