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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.
| 50201. |
Write the events occurring photosynthesis |
| Answer» 1) Absorption of light energy by the chlorophyll.2) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen.3) Reduction of CO2 to carbohydrates. | |
| 50202. |
What is washing soda and baking soda write the formula and reaction |
| Answer» Washing soda is sodium carbonate decahydrate. Chemical formula: Na2CO3.10H2OBaking soda is sodium hydrogencarbonate.Sodium hydrogencarbonate is produced on large scale by reacting a cold and concentrated solution of sodium chloride with ammonia and carbon dioxide. | |
| 50203. |
Why soap is not used in hard water |
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Answer» Soap can not be dissolved in hard water .It produces an insoluble substance called scum. Because it produces scum in hard water |
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| 50204. |
What is history furcation write the reaction |
| Answer» This is wrong question it\'s question is what is Esterification write an reaction | |
| 50205. |
What is hydrogenation write the reaction |
| Answer» The addition of hydrogen to an unsaturated hydrocarbon to obtain a saturated hydrocarbon is called hydrogenation. When a vegetable oil (like groundnut oil) is heated with hydrogen in the presence of finely divided nickel as catalyst, then a saturated fat called vegetable ghee (or vanaspati ghee) is formed. This reaction is called hydrogenation of oils. | |
| 50206. |
Write difference between Ketone and aldehyde give only one point |
| Answer» Ketone\'s functional group is C double bond O .Aldehyde\'s functional group is C double bond O single bond H. | |
| 50207. |
Why are Precipitate insoluble in water? |
| Answer» These are insouble so called precipitates.Precipitate is just a name | |
| 50208. |
Reproduction types |
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Answer» Sexual and asexual sexual reproduction and asexual reproduction Sexual abd asexual reproduction |
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| 50209. |
How stomata function as turgor operated valves? |
| Answer» Stomata and guard cells are called turgor operated valves because each stomata consists of a minute pore called stoma surrounded by two guard cells. The stoma acts as a turgor operated valve which closes and opens according to the turgidity of guard cells. | |
| 50210. |
What is homologous series |
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Answer» Homologous series are those molecules with have same molecual formula but each compound differ by a unit In carbon it is CH2For ex CH3-CH2-CH3And CH3-CH2-CH2-CH3 A seies of hydrocarbons in which the succeeding element differs by ch2 group A series of compounds in which the same functional group substitutes for hydrogen in a carbon chain is called a homologous series. |
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| 50211. |
How nationalism developed in india ?? |
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Answer» 1 . Taxes are incresed to maintain the war requirement 2. Village were call upon to suppy soldiers which rages the villagers3. epedemic in 1917-18 and 1919-20 due to acute storage of food There was a boycott of british cloth to promote khadi......through national flag, abolisation of colonial rule, and making poetry and songs to develop a sense of attachment to each other and promote national movement. |
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| 50212. |
Autotropj and hetrotroph |
| Answer» Autotrophic 1) this process is absent. 2) it is present in autoteophs. 3) they are known as producer. 4) in this mode of nutrition ,food Is prepared by organism itself.5) the raw material are required By the organism (autotrophs)Heterotrophic1) it is absent 2) they are known as consumers3) the raw materials are not required4) this process is required for the Conversation of complex molecules Into simpler and more soluble ones5) in this made of nutrition food is Obtained from other organisms (Autotrophs) | |
| 50213. |
Difference between spit rings n slip rings? |
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Answer» Ok..bye ?????? Wlcm ??? No..I\'m not busy ?? Split ring is used to change the direction of current after every half rotation while slip ring is used to make contact between the rotating coil and electric circuit... - Split rings are used in electric motors whereas slip rings are used in generators.- split rings are half circles whose inner side is insulted. They act as a commutator in motors.- slip rings also have insulated inner side but are circles. |
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| 50214. |
Impt questions of chapter 1 |
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Answer» All types of reactions and two-two example of each reaction.Chemical equation balancing Precipitation rxn Types of decomposition rxn wid eg? |
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| 50215. |
Syllabus for pre final 1 |
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| 50216. |
Explain in detail palaeontology evidences and physiological evidences |
| Answer» Evidences of evolution:Some of the important sources which provide evidences for evolution are:(a) Analogous Organs: Organs which performs similar function but are different in structure and origin.Example - wings of a bird and wings of an insect.The presence of analogous organs indicates that even the organisms having organs with different structures can adapt to perform similar functions for their survival under hostile environmental conditions. Thus, the presence of analogous organs in different animals provide evidence for evolution by telling us that though they are not derived from common ancestors, they can still evolve to perform similar functions to survive, flourish and keep on evolving in the prevailing environment.(b) Homologous Organ: Organs which have different functions but similar structure and origin. Example - fore arm of frog, lizard, bird and human.The presence of homologous organs in different animals provides evidence for evolution by telling us that they are derived from the same ancestor who had the \'basic design\' of the organ on which all the homologous organs are based. (c) Fossils: The remains of dead animals or plants that lived in the remote past are known as fossils. The fossils provide evidence of evolution. For example, a fossil bird called Archaeopteryx looks like a bird but it has many features which are found in reptiles. This is because Archaeopteryx has feathered wings like those of birds but teeth and tail like those of reptiles. Therefore, Archaeopteryx is a connecting link between the reptiles and birds and suggests that birds have evolved from reptiles. Thus, fossils provide evidence that the present plants and animals have originated from the previously existing ones through the process of continuous evolution. | |
| 50217. |
Major constituent of biogas |
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Answer» Methan carbon dioxide hydrogen & hydrogen sulphide Methane #75% Methane (75%) Methane.. |
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| 50218. |
Chlorea caused by |
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Answer» severe watery diarrhea..? bactrea Bacterium Vibrio Cholerae.... Bacteria |
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| 50219. |
Limitation of doberain |
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Answer» It also failed to explain the relation between atomic masses of elements and their chemical properties.. The main limitation of Dobereiner\'s classification of elements was that it failed to arrange all the then known elements in the form of traids of elements having similar chemical properties. Dobereiner could identify only 3 traifs from the elements known at that time. So, his classification of elements wasn\'t much successful. |
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| 50220. |
Distinguish between baking soda and baking powder |
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Answer» \tBaking SodaBaking PowderHas only one ingredient – Sodium BicarbonateConsists of many ingredients including Bicarbonates (typically baking soda), and acid salts.Does not contain Monocalcium PhosphateContain Monocalcium Phosphate, which reacts with NaHCO3 when wetted and heated.Reacts immediately with acidsIt does not immediately react when exposed to acids.Short leavening processThe leavening process extended with the help of a second acid.Baking products formed when baking soda is used are not as fluffy when compared to baking powder products, due to shorter reaction duration.Gives fluffier products from baking\t Baking soda is Sodium bicarbonate..Baking soda + tartaric acid ------> Baking powder [email\xa0protected]/* Yes Baking soda is sodium bicarbonate while baking powder is formed when sodium bicarbonate is mixed with any mild edible acid NaHCO3 |
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| 50221. |
SPEED OF LIGHT IN VACCUM? |
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Answer» (&@&@&3*#) 186,282 299,792 kilometers per second Sorry..3 × 108m/s 3 × 10⁸ m/s...... 3.8 × 108 m/s |
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| 50222. |
How many planets were homozygous around how many plants were heterozygous around |
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| 50223. |
What is the function of valves present in between atria and ventricles |
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Answer» Bicapsid valve and tricapsid valve are present to prevent the back flow of blood when blood from atria to ventrical Valve is present between artery and ventricle. To prevent the high pressure of blood. When blood is enter in left artrium then its pressure is high to main the pressure tricuspid valve is present in left artrium. Tricuspid valve is present btn upper chamber atria and lower chambers ventricles. It prevent backward flow of blood from one chamber to the other chambers of the heart... Valves present between atria and ventricles helps to prevent the backflow of blood |
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| 50224. |
What is the newest FORM of iron ore |
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Answer» What is the chemical name of bleaching power Don\'t know |
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| 50225. |
Can anyone exmpain me about ethanol |
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Answer» Ethanol is a carboun compound having chemical formula C2H5OH. It is soluble in water in all proportions. It is also used in medicines. Ethanol is acid which is in the form of ethanoic acid CH3COOH. |
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| 50226. |
What h nephron and its functions |
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Answer» Nephron is the basic functional unit of kidneys that consists of a glomerulus and its associated tubules through which the glomerular filtrate passes before it emerges as urine.Functions of NephronThe primary function of nephron is removing all waste products including the solid wastes, and other excess water from the blood, converting blood into the urine,\xa0reabsorption,\xa0secretion, and excretion of numerous substances.As the blood\xa0passes through the glomerulus with high pressure, the small molecules are moved into the\xa0glomerular capsules and\xa0travel through a winding series of tubules.The cell present in each tube absorbs different molecules excluding the glucose, water, and other beneficial molecules which are called ass the\xa0ultrafiltrate. As the ultrafiltrate molecules travel\xa0down the tubules they become more and more hypertonic, which results in more amount of water to be extracted from the ultrafiltrate before it exits the nephrons.The blood surrounding the nephron travels back into the body through the renal\xa0blood vessels, which are free of toxins and other excess substances. The obtained ultrafiltrate is urine, which travels down via the collecting duct to the bladder, where it will be stored and released through the urethra. Filtration unit of kidney is called nephrons. It\'s filter urea through urine process in body. A large number of filitration units called nephrons their functions are: It will filter the urea ,uric acids from our blood |
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| 50227. |
Symbols and charges for monoatomic ion |
| Answer» A monatomic ion is an ion consisting of exactly one atom. If an ion contains more than one atom, even if these are of the same element, it is called a polyatomic ion. Example - H+ for hydrogen ion, Li+ for lithium ion, Na+ for sodium ion. | |
| 50228. |
Sky appear to be dark insteat blue |
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Answer» Bcoz in space , there is not atmosphere. So, the phenomena of scattering light is not possible. May be?? Clening action of shoap |
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| 50229. |
What is the homologous and function |
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Answer» Structures which have a common basic structure but perform different functions are called homologous structures, e.g., forelimbs of reptiles, amphibians and mammals. Yes, they have common ancestor but variously modified to carry out different activities. Homogenous has similar structure and different functions like mammals they have four limbs as their structure are same and perform different functions like birds, reptiles, etc |
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| 50230. |
How is fragmentation different from regeneration? |
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Answer» \tFragmentationRegenerationOrganisms that are fragmented result in each fragment growing into an individual organismRegeneration occurs when an organism only regrows a lost limb or any other part of the body.A new individual emerges from each fragmentNo new organisms are formedOnly a few organisms can fragment and form new individualsAll organisms exhibit the ability to regenerate to some degreeFragmentation is observed in organisms such as flatworms and spongesExamples of regeneration include regrowing a lost limb, such as the tail of a lizard\t Fragmentation is organism breaks into two or more small pieces each piece gives rise to new organismsRegenration is a single segment of an organisms can give rise to new individuals |
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| 50231. |
What happens to acid or base in water solution |
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Answer» Acids in water solution dissociates H+ ions. Let us consider the reaction between water and hydrochloric acid (HCl). HCl in presence of water produces H+ ion. This ion cannot exist alone and hence combines with water molecules and forms H3O+. The reaction is as follows:HCl + H2O → H3O+ + Cl-Base when dissolved in water produces OH- ion. Let us consider the reaction between water and sodium hydroxide NaOH. NaOH in presence of water produces OH- ion.NaOH + H2O → Na+ + OH- + H2O Acid gives H+ ion in aqueous solution and base dissolves in water to give OH- ion.... They form ions... |
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| 50232. |
Give the chemical test to detect the presence of ethanol and ethanoic |
| Answer» Add sodium hydrogen carbonate to both...The one which gives brisk effervesce due to evolution of carbon dioxide is ethanoic...and in ethanol , there\'s no effect of NaHCO3.. | |
| 50233. |
Different between bio mass and hydro electricity |
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Answer» a) Both Bio-mass and Hydro-Electricity are renewable sources of energy.b) The use of bio-mass by burning causes air pollution but the use of hydroelectricity do not.c) Bio-mass gives heat energy which can be used for cooking and heating whereas hydroelectricity can be used for running all types of electrical appliances.d) Bio-mass energy can be obtained without using any special devices but hydroelectricity can be produced only by establishing hydro-power plants. Hi sorry the answer is ...??..Biomass and hydroelectricity are different in many aspects. Hydroelectricity is generated using the kinetic energy from moving water, while the energy from biomass is generated by decomposition of farm waste. Since biomass is composed of organic compounds so energy from biomass results in air pollution. Hydroelectricity, on the other hand, is pollution free. 10 Science Sources of EnergyNCERT Exercise SolutionWhat are the limitations of extracting energy from:WindAnswer: Large tract of land is required for establishment of wind farms. They can be established only at those places where wind speed is high enough. Initial cost of establishing a wind farm is very high and the cost of maintenance is also high.WavesAnswer: Energy from waves can be harnessed only at selected places; only in coastal areas.TidesAnswer: Energy from tides can be harnessed only at selected places; only in coastal areas. Technologies for harnessing energy from waves and tides are still at experimental stage and hence are less efficient and very costly.PrevSource of EnergyNon-conventional EnergyInText SolutionNCERT SolutionQuizNext A solar water heater cannot be used to get hot water onA sunny dayA cloudy dayA hot dayA windy dayAnswer: (b) A cloudy dayWhich of the following is not an example of a bio-mass energy source?WoodGobar-gasNuclear energyCoalAnswer: (c) Nuclear energyMost of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?Geothermal energyWind energyNuclear energyBio-massAnswer: (c) Nuclear Energy Compare and contrast fossil fuels and the Sun as direct sources of energy.Answer: Sun is the direct source of energy, while fossil fuels are formed because of the solar energy stored in them. When green plants prepare food, they convert the solar energy into chemical energy which is stored in the form of biomass. The same biomass gets transferred to the animals. Thus, the energy in the form of biomass which is stored in fossil fuels has come from the sun.Compare and contrast bio-mass and hydroelectricity as sources of energy.Answer: Biomass and hydroelectricity are different in many aspects. Hydroelectricity is generated using the kinetic energy from moving water, while the energy from biomass is generated by decomposition of farm waste. Since biomass is composed of organic compounds so energy from biomass results in air pollution. Hydroelectricity, on the other hand, is pollution free. |
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| 50234. |
What is heating effect of electric current..?? |
| Answer» When electric current passes through a high resistance wire, the wire becomes hot and produces heat. This is called heating effect of current. | |
| 50235. |
What is solenoid .With digram explain |
| Answer» Solenoid is a coil of many circular turns of insulated copper wire wrapped closely in a cylindrical form acting as a magnet when current is passed through it. | |
| 50236. |
4 main digestive enzymes in human body with their functions |
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Answer» Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. helps to break the complex food particles into simple ones so that these simple particles can be easily absorbed by the blood and thus transported to all the cells of the body. Hey ?salivary amylase- breaks down complex carbohydrates?pepsin-protein digesting enzyme?trypsin- protein digesting?lipase-fats digesting ? |
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| 50237. |
How to score 90%in 10th board |
| Answer» Last 10year solved board paper | |
| 50238. |
Why milkman add baking soda in milk? |
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Answer» It may not get sour due to the presence of lactic acid in it It is done to prevent the formation of lactic acid which spoils the milk So that milk can be prevented from cuddling Baking soda is a base. It is added to fresh milk to prevent the curdling of milk because it neutralise the lactic acid produced in the milk by the action of bacteria. ... This is why the milkman adds baking soda in milk |
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| 50239. |
Which compound maintain permanent hardness of water?? |
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Answer» Okk Washing soda Calcium and magnesium salts maintain hardness of water Baking soda REMOVES parmanent hardness..... Washing soda |
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| 50240. |
If one of the metal present in an alloy in mercury then it is called???? |
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Answer» Amalgam Wrong answer ????? Amalgam Amalgam |
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| 50241. |
The density of water is maximum at a)0 b)100c) 4 d)25 |
| Answer» 4 degree celcius | |
| 50242. |
Potential difference between live wire and neutral wire is.......... |
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Answer» 220v and 50 hz in india well in America 60 hz In India potential difference of live wire is 220V and of neutral wire is 0V Live wire carry current of high voltage as we know that energy never be destroyed neutral wire carry current from appliance 220 V in India |
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| 50243. |
I wamt sciemce experiments photos |
| Answer» | |
| 50244. |
Ch 10 numericals solution |
| Answer» | |
| 50245. |
Tungsten has low or high resistivity?why? |
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Answer» High It has high resistivity because it is an alloy High Low Low resistivity but In bulb we use thin wire so resistance increases hugely It has low resistivity |
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| 50246. |
Name the carrier rocks of diamonds |
| Answer» Kimberlite is an igneous rock, which contains diamonds. | |
| 50247. |
What is capulation |
| Answer» The process of entering of sperms into the vaginal opening of the female during the process of sexual intercourse between the male and female partners is known as copulation..The next step to copulation is fertilization which occurs by the fusion of the male and female gametes..Fertilization only occurs after the process of ovulation.. | |
| 50248. |
why hydrogen displaces lead oxide |
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Answer» IThe enthalpy of formation of H2O is significantly larger than the enthalpy of formation of PbO, so this reaction is exothermic. Reactivity series are not perfect predictors. Results depend on what an element is being reacted with. can charcoal act as a reducing agent |
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| 50249. |
What is the source of oxygen in photosynthesis |
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Answer» Water is the source of oxygen released in photosynthesis. During the light-dependent phase of photosynthesis, photolysis of water occurs which release oxygen. This oxygen gas is released into the atmosphere. Water absorbed by roots |
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| 50250. |
What is charcoal???? |
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Answer» When wood is burn in low oxygen and all the non voltial material is removed from the wood the black solid is left is know. as charcoal When wood is burnt in low oxygen state it forms a dark black solid called charcoal.this,when burnt, does not give much smoke The left over residue when wood is burnt is called as charcoal.It is environmental friendly as it produces less smoke and has a high calirofic value as it emits more heat It is a form of carbon compound |
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