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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.
| 69201. |
What are the solid waste products of plants? |
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Answer» Oxygen 1. Excess water is removed through stomata by transpiration which is the process of removal or evaporation of water.2. Plants also get rid of oxygen, a by - product in the process of photosynthesis and carbon dioxide which is the by - product formed during respiration. The plants get rid of these by stomata present in their leaves.3. Some of the wastes stored in the leaves are removed by the detachment of the leaves itself from the tree.4. Waste are also stored in the cellular vacuoles which do not affect the functioning of cytoplasm because of its outer membrane known as tonoplast.5. Other waste products are stored in resins and gums, especially in old xylem which stops working thereby.The thing is that the plant have many xylem tissues for the transportation of water and old xylem tissues always get replaced by the new ones.6. Terrestrial plants excrete some waste into the soil around them whereas aquatic plants remove the wastes by the process of diffusion. |
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| 69202. |
A glotiss is guarded by epiglottis |
| Answer» The glottis is guarded by epiglottis because it prevents the entry of food in wind pipe. If the food enters wind pipe, then it chokes it, leading to the death of the person. | |
| 69203. |
A tarnished copper vessel begins to shine again when rubbed with lemon. why? |
| Answer» Copper vessel is tarnished due to copper oxide layer formed on its surface .Copper oxide is basic in nature. The green coating on copper vessels is due to the formation of basic copper carbonate formed by the attack of O2, CO2 and moisture of the air on the copper vessel.Lemon is acidic. Thus, on rubbing the tarnished copper vessel with lemon, the basic copper oxide or copper carbonate reacts with the acid (citric acid) present in the lemon to form a salt which is washed away with water | |
| 69204. |
Describe the nutrition in human beings |
| Answer» \tNutrition in human beings takes place through parts like mouth, stomach, small intestine, large intestine, ****\tThe process of nutrition takes place through an\xa0alimentary canal\xa0which is a long tube extending from the mouth to the ****.\tComplex foods should be converted to smaller ones by crushing the food with teeth and by the enzyme\xa0salivary amylase\xa0of saliva secreted by\xa0salivary glands.\tSalivary amylase breaks down starch which is a complex molecule into sugar.\tAs the canal lining is soft so food is made wet to make the passage smooth.\tThe alimentary canal has different parts and the food should be moved in a regulated manner along the digestive tube so the food is processed properly in each part.\tThe canal has muscles that contract rhythmically to push the food forward and this movement of food is called\xa0peristaltic movement\xa0which occurs all along the gut.\tThe food is taken to the stomach through the food pipe or oesophagus from mouth.\tThe muscular wall of stomach mixes the food with more digestive juices secreted by the gastric glands present in the wall of the stomach.\tGastric gland releases\xa0hydrochloric acid, a protein digesting enzyme called as\xa0pepsin,\xa0mucus.\tEnzyme pepsin acts on the food and hydrochloric acid facilitates the action of pepsin.\tMucus protects the inner lining of the stomach from the action of acid under normal conditions.\tFrom stomach acidic food enters small intestine, the longest part of alimentary canal and this is regulated by\xa0sphincter muscle.\tComplete digestion of carbohydrates, protein and fats take place in the small intestine by the secretions of liver and pancreas.\tBile\xa0secreted by liver makes the acidic food alkaline and acts on large globules of fat into smaller globules so that the enzymes can act on easily.\tThe process of breakdown of large fats globules into small globules which increases the efficiency of the pancreatic enzymes is called\tPancreas secrete pancreatic juice which contains enzyme\xa0trypsin\xa0to break for digesting proteins,\xa0lipase\xa0for digesting emulsified fats.\tThe walls of the small intestine contain glands secreting intestinal juice which converts finally complex carbohydrates into glucose, proteins to amino acids and fats into fatty acids and glycerol.\tThe inner wall of small intestine has finger like projections called\xa0villi\xa0which are richly supplied with blood vessels and these take absorbed food to all the cells of the body.\tThe unabsorbed food is sent to the large intestine where more villi absorb water from this undigested material and the rest of the material is excreted from the body by\xa0****.\tThe excretion of waste materials by **** is regulated by the\xa0**** sphincters. | |
| 69205. |
What is Ozone layer?mention its importance. |
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Answer» Thx to both of you ?? The outer layer of the atmosphere , covered by a layer known as Ozone layer ???? Upper layer of our atmosphere is covered by a layer called ozone layer. Ozone protects the Earth from harmful ultraviolet (UV) rays from the Sun.plants can\'t survive in heavy ultra violet radiation. |
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| 69206. |
What is Biodegradable substances? |
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Answer» Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things by composting, aerobic digestion, anaerobic digestion or similar processes Biodegradable substances are organic waste matters that can be broken down into compost or simple organic molecules by biological means. |
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| 69207. |
Mention Ohm\'s law.?? |
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Answer» V=IR Ohm\'s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. |
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| 69208. |
Definition of blood. |
| Answer» It is a fluid which carry oxygen to all part of the body who are u | |
| 69209. |
Advantages of SHG\'s group. |
| Answer» \xa0Self Help Group (SHG) is a group of about 15-20 members who pool their savings together. Following are the advantages of SHG:\tMembers can take loans from the group’s savings themselves on a decided rate of interest. The rate of interest is much lower than the interest that is charged by the informal sources.\tAfter two years of regular savings, the SHG can also take a loan from the bank. Loan is given on the name of the group and creates tremendous opportunities for self-employment of the members.\t\t\tDue to SHG, the poor members are able to avail loan even in the absence of collateral.\t\t\tMany women as the members of SHGs have become economically independent. This has led to women empowerment at the rural levels.\t | |
| 69210. |
What is quantisation of charge? |
| Answer» Quantization of charge means that when we say something has a given charge, we mean that that is how many times the charge of a single electron it has. Because all charges are associated with a whole electron, this is possible. ... So electrons have a a negative charge, negative charge. | |
| 69211. |
Why is the burning of a candle a physical change whereas burning of the candle wax a chemical change |
| Answer» I already give the answer in your last question | |
| 69212. |
What is the difference between burning of a candle and burning of candle wax ? |
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Answer» Burning of candle is a physical changeReason :On heating solid wax changed to liquid .Burning of wax is a chemical changeReason:The wax vapour near to the flame burns and give new substance like CO2 ,heat and light energy. Burning of candle?️is a chemical reaction.And burning of candle wax is a physical change.☺️☺️ |
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| 69213. |
https://www.facebook.com/PKR-Jain-Vatika-Sr-Sec-Day-Boarding-School-1011500848871751/ |
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| 69214. |
Why does the sun appear reddish early in the morning?? |
| Answer» Red colour has a longer wavelength, the red colour is able to reach our eyes after the atmospheric scattering of light. Therefore, the Sun appears reddish early in the morning. | |
| 69215. |
What is the differnce between resistance and resistivity?? |
| Answer» 1.\xa0Resistance is the physical property of a substance because of which it opposes the flow of current i.e. electrons whereas resistivity is the physical property of a particular substance which is having particular dimensions.2.\xa0Resistance is directly proportional to the length and temperature while it is inversely proportional to the cross-sectional area of the material whereas resistivity is only proportional to the nature and temperature of the particular material. | |
| 69216. |
What is contentment zone? |
| Answer» According to the Union Ministry for Health and Family Welfare, containment zones are specific geographic areas where Covid-19 positive cases are found in large numbers. | |
| 69217. |
List two merits of solar cell. |
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Answer» The energy can be used both to generate electricity and heat in the house, either through solar PV or solar thermal. Renewable energy is recovered from the sun, the wind and waves - which in this case is the sun. Solar cells harness the energy from the sun and transform this into usable electricity Solar power is pollution free and causes no greenhouse gases to be emitted after installation. Reduced dependence on foreign oil and fossil fuels. |
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| 69218. |
Why is boigas considered an excellent fuel? |
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Answer» Thx Biogas is considered an ideal fuel for domestic use because: (a) Biogas burns without smoke and hence does not cause air pollution. (b) Biogas has a high calorific value. |
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| 69219. |
State the law of reflection of light ? |
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Answer» There are 2 laws of reflection-1. The incident ray,reflected ray and normal all lie on the same plane at same point.2.Angle of incidence is equal to angle of reflection. Thx to both of you ?? Angle of incident is equal to angle of reflection The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection. |
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| 69220. |
How will I get Ques paper of year 2019-20 |
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Answer» Thanks for answering Jis subject ka chahiye usko click karo do aur ussma previous years paper mai hoga |
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| 69221. |
Name the two elementthat are used in fabricating solar cell? |
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Answer» Silicon and silver Silicon and silver are the two elements that help in fabricating the solar cells , |
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| 69222. |
What is the colour of methyl orange in acidic solution ❓❓? |
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Answer» Welcome Ishika. Ji Thank you Red Thanks Red |
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| 69223. |
What is chemical formula for lime water |
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Answer» Ca(OH)2 Ca(OH)2 |
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| 69224. |
Why do metals behave as reducing agent❓❓ |
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Answer» Ishika do u know rider r u lovers Because metals easily release electrons from their outermost shell to obtain stable octet configuration Abey intro dene ke liye time nii h smja... I am new can everyone introduce their self Hello nice to meet u |
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| 69225. |
What are the uses of caustic soda.? |
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Answer» Please say Now what this romour spreaded completely I just saved u from him i didnt expect this Ishika what is going on SORRY, SORRY, SORRY, SORRY..........?? |
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| 69226. |
Is every double displacement reaction a prexipitation reaction |
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Answer» Because in every double displacement reaction a precipitate is formed Yes I think ues |
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| 69227. |
We all are unknown for each other So plzz request kr rahi ap log se kuvh v mat likha kro..plzzzz? |
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Answer» ?? Affairs setting aa Hey please answer Hey what happened Hey is anything wrong |
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| 69228. |
How is the NaOh obtained? |
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Answer» Thanks... Sodium hydroxide is produced (along with chlorine and hydrogen) via the chloralkali process. This involves the electrolysis of an aqueous solution of sodium chloride. The sodium hydroxide builds up at the cathode, where water is reduced to hydrogen gas and hydroxide ion: 2Na+ + 2H2O + 2e− → H2 + 2NaOH. |
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| 69229. |
What is double displacement reaction ? |
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Answer» Thanks Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions. In double replacement reactions, the positive ions exchange negative ion partners. A double replacement reaction is represented by the general equation.AB + CD → AD + CBIn a double displacement reaction, atoms from two different compounds switch places. The reactants are two compounds and the products are two different compounds. Double displacement reactions can also be called double replacement reactions.Fe2O3\xa0+ 6HCl → 2FeCl3\xa0+ 3H2OMany double displacement reactions occur between ionic compounds that are dissolved in water. |
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| 69230. |
Explain the properties of caustic soda. |
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Answer» Ok by i should leave now.... If he continous i have other idea dont worry Super boy Ye name thk h na... What do u say know |
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| 69231. |
What is the colour of neutral litmus solution |
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Answer» I will keep some girl name And remember u keep any boy name other wise keep my name I mean good Ok...goog idea We will change name |
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| 69232. |
What is an alkali |
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Answer» What We will do the same what he asks But i have an idea I am sorry its all because of me you are a girl i can understand the pain It is a type of base which is soluble in water. |
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| 69233. |
Nutrition brifely notes |
| Answer» xxx | |
| 69234. |
When Zn granules are added to dilute H2SO4 Which of the following reactions take place? |
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Answer» Evolution of hydrogen gas When dilute sulphuric acis is added to zinc granules, then zinc should become white, as it is becoming zinc sulfate, which is also known as "white vitriol." The reason proceeds with the liberation of hydrogen gas and a large amount of heat as below -Zn (s) + H2SO4 (aq) →\xa0ZnSO4(s) + H2(g) (Exothermic reaction) Zn+H2SO4---------> ZnSo4+H2 |
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| 69235. |
What is a diffraction? |
| Answer» Diffraction is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture | |
| 69236. |
Why are s x important |
| Answer» | |
| 69237. |
How can balance the chemical equation |
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Answer» By ABCD method...search on YouTube.. Steps Involved in Balancing a Chemical Equation:Consider the chemical reaction between magnesium and oxygen to understand the steps involved in balancing a chemical equation.Step 1:Let us first write the word equation for this reaction.Magnesium + Oxygen → Magnesium oxide\xa0Step 2:Write the chemical equation for the reaction between magnesium and oxygen.Mg + O2 → MgOStep 3:Count the number of atoms of an element occurring on both L.H.S. and R.H.S. in this equation.Mg + O2 → MgO\tComponentReactantProductMagnesium11Oxygen21\t\xa0This is an unbalanced equation.\xa0Step 4:To balance a chemical equation, first draw boxes around each formula. Do not change anything inside the boxes while balancing the equation.\xa0Choose a reactant or a product which has the maximum number of atoms in it.\xa0In that compound, select the element which has the maximum number of atoms. In this equation we shall select MgO i.e. magnesium oxide and the element oxygen in it.To balance the oxygen atoms, let us multiply magnesium oxide molecule by 2 on the right hand side.\tComponentReactantProductMagnesium11 x 2 = 2Oxygen21 x 2 = 2\t\xa0Step 5:There are two oxygen atoms on either side of the equation but one magnesium atom on the reactant\'s side and two on the product\'s side. Therefore, multiply the magnesium atom by 2 on the left hand side.\xa0\tComponentReactantProductMagnesium1 x 2 = 22Oxygen22\t\xa0Therefore, the number of atoms of each element of reactants = The number of atoms of each element of products.\xa0Step 6: Writing Specific Conditions on the ArrowThe reaction is carried out in the presence of ‘Heat’. On heating, magnesium combines with oxygen present in air to form magnesium oxide.\xa0Step 7: Writing Symbols of Physical States\xa0The various ways in which a chemical equation can be made more informative are : (i) By indicating the physical states of the reactants and products. Example: Solid state is indicated by the symbol (s).(ii) By indicating the heat changes taking place in the reaction. For Example: An exothermic reaction is indicated by writing “+Heat” or “+Heat energy” or “+Energy” on the products side of an equation.(iii) By indicating the “conditions” under which the reaction takes place.Example: Delta stands for heat which is written on the arrow sign in the equation. |
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| 69238. |
Pariodic table |
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Answer» Perodic table is a table of elements that is discovered since today,there are 118 elements in periodic table U want defination |
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| 69239. |
What is the colour of phenolphthalein in soap solution ❔❔? |
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Answer» Pink Thanks?? Pink The colour of phenolphthalein in soap solution is pink.Beacause soap is a base and when synthetic indicator i.e. phenolphthalein is used it remain same in acid but it change in base i.e.pinkHope it helps you! RED |
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| 69240. |
What are neutralization reactions????? |
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Answer» ????? Sosankar keep If u don\'t know so keep quiet ??? It is a chemical reaction in which acid and a base reacts quantitively with each other.☺️ What is neutrization [email\xa0protected] |
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| 69241. |
Which is represented by c |
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Answer» Centre of curvature Centre of curvature C is used to represent the speed of light in air |
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| 69242. |
Define H2SO4 have negative ions |
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Answer» H2SO4 is an acid . So , when we will add it to water it will give H+ ions And acid only produced H+ ions No because H2SO4 is a acid |
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| 69243. |
What is fleece |
| Answer» A fleece is a sheep\'s coat. Or a goat\'s. Or a yak\'s. A person\'s coat can be called a fleece | |
| 69244. |
Make a project on topic acid, bases and salts |
| Answer» | |
| 69245. |
Meaning of MENTAL |
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Answer» Mad, psycho, marl in tulu language Paagal |
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| 69246. |
Identify the substance which undergoes oxidation and reduction:-2Al + 6HCl = 2AlCl³ + H² |
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Answer» Aluminum got oxidized and HCI got reduced HCl oxidizedH Reduction |
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| 69247. |
5 mark question of chemical reactions |
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Answer» Cna u solve this question 1. You are given with(a) Iron Nails(b) CuSO4 solution(c) Bacl2(d) Cu powder(e) Ferrous sulphate crystal(f) Quick lime.Make five reactions that can take place from these materials. |
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| 69248. |
Why is akshat Kumar so pagl |
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Answer» No Do u people know who is j7 max or meghu or jairuban Pagal ka full form :pfor pyaare hoA for acche ho g forgreat ho a for amezing ho l for lovely ho Wo to wahi janta hoga. By the way pagal hona ek kala hai. I am also MENTAL |
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| 69249. |
Why do fishes die when taken out from water |
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Answer» Fishes breathe through gills and in water only. They cannot breathe through gills when they are taken from water. Because they don\'t have lungs or skin for respiration.Fishes have gill which can work only in water. Thx ? Without water, the gills dry and stick to each other, and gas exchange cannot take place. |
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| 69250. |
Which cell that are surround in stomatal pore?? |
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Answer» Thx ??? Guard cell |
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