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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 3451. |
13. Analloy of copper and zinc contains 45% copper and the rest is zinc. Find the weight ofzinc in 2 kg of the alloy |
| Answer» <p>So we know that 100% of the weight is 2kg, and from the info you gave, we can work out that 55% of that is zinc.</p><p>First of all we need to find out how much 1% is worth and to do that we divide 2kg/100 = 0.02kg</p><p>1% = 0.02kg</p><p>Next we simply times that by 55 to find the total weight of zinc55 x 0.02 = 1.1kg</p><p>and if you need the weight of the copper is 0.9kg</p><p>Like my answer if you find it useful!</p> | |
| 3452. |
define breathing |
| Answer» <p>Ans :- Breathing: The process of respiration, during which air is inhaled into the lungs through the mouth or nose due to muscle contraction and then exhaled due to muscle relaxation.</p> | |
| 3453. |
Breathing and Respiration |
| Answer» <p>Breathing is the physical process where you inhale and exhale air in and out of your lungs. Inhaling brings in air containing Oxygen, which is absorbed and exchanged for Carbon Dioxide. The Carbon Dioxide, now in the air inside your lungs, is expelled when you exhale. The Oxygen is carried in your blood to the cells around your body where respiration takes place. </p><p>Respiration is a chemical reaction where Oxygen is used to breakdown Glucose in order to generate energy which is then used by the cell to function.</p> | |
| 3454. |
(c) Explain the mechanism of breathing in human beings. |
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| 3455. |
Artificialmagnets are made in different shapes such asoeăand |
| Answer» <p>Artificial magnets are made in different shapessuch as barmagnets, horse-shoemagnets, and cylindricalmagnets. (ii) Materials which are attracted towardsmagnetsare called magnetic materials. ... (iv) In olden days, sailors used to find direction by suspending a piece of barmagnet.</p> | |
| 3456. |
(a) Distinguish between natural and artificial magnets. |
| Answer» <p>thanks</p> | |
| 3457. |
(a) Distinguish between natural and artificial magnets, |
| Answer» | |
| 3458. |
them You have only tmer10. Blue litmus paper is dipped in a solution. It remains blue. What is thenature of the solution? Explain. |
| Answer» <p>The solution is basic in nature. If acid was added to blue lithmus paper it would have turned into red lithmus paper </p> | |
| 3459. |
Why acetic acid does not turn blue litmus to red |
| Answer» <p>IT IS A WEAK ACID SINCE FEWER H30+IONS ARE PRESENT. THEREFORE IT DOES NOT TURN BLUE LITMUS PAPER TO RED.</p> | |
| 3460. |
(1) Write about artificial food colours, the substances used in them and theirharmful effects. |
| Answer» <p>Food dyes are chemical substances that were developed to enhance the appearance of food by giving it artificial colour.</p><p>Nowadays, food dyes are made from petroleum.</p><p>They are made in a lab with chemicals derived from petroleum, a crude oil product, which also happens to be used in gasoline, diesel fuel, asphalt, and tar. </p><p>harmful effects:</p><p>Links to Cancerfood poisoning</p> | |
| 3461. |
True or falte :D A reveribl change can be undon2) Mixing and in wala is an Wreversible change3.) when we mix salt at walo, a permanent changecaused.4.) Boiling of parlatoan erreversible change. |
| Answer» <p>truefalsefalsetrue</p> <p>A) Trueb) Falsec) Falsed) True</p> <p>truefalse falsetrue</p> <p>1)TRUE, IT CAN GO TO ITS PRIOR STATE.2) FALSE, SAND AND WATER CAN BE SEPERATED THROUGH SEDIMENTATION.3) TRUE, BECAUSE YOU CANT SEPERATE WATER AND SALT AFTER MIXING.4) TRUE, BECAUSE YOU CANT CHANGE INTO ITS PRIOR POSITION.</p> <p>true false false true</p> <p>true falsefalsetrue ☺😊😊☺</p> | |
| 3462. |
24. The Plant Growth Regulator (PGR), ethylenecomes under the category of |
| Answer» <p>Ethylene can be a promoter or an inhibitor, but is largely a Plant Growth Inhibitor.</p> | |
| 3463. |
c-Morphology and PhylogenyThe classification of plants and animals on the basis of chromosome number, structure and behaviour is(a) Cytotaxonomy(c) Numerical taxonomy(b) Chemotaxonomy(d) Classical taxonomyiral nature of proteins have been used as basis of classification in |
| Answer» <p>cytotaxonomy is the correct answernumerical taxonomy is called phenetics</p> <p>d) classical taxonomy</p> <p>it is actually systematic</p> | |
| 3464. |
Column Aa. Stomatab. XylemYeastd.FishColumn B(i) Gills(11) Alcohol(iii) Transpiration(iv) Transportation of water |
| Answer» <p>stomata-transpirationxylem -transportation of wateryeast - alcoholfish-gills</p> | |
| 3465. |
observations: 1) The pinkishhizobium bacteria are notced undercompound microscope.InferenceRhizobium bacteria present in root of ...plants help to increasethe.... content of pulses by the process of nitrogen fuation. |
| Answer» <p>1) nitrogen fixing2) leguminous, nitrogenous</p> | |
| 3466. |
The process of purifying water by adding chlorine |
| Answer» <p>the process of purifying water by adding chlorine is called chlorination</p> | |
| 3467. |
C. Match the following.Column A1. sauce2. grapesColumn Ba carbohydratesb. roughagec. drying3. nuts and oil4. energy-giving foodd. canning5. remove waste from the body e. fatsclloing in brief |
| Answer» <p>1. d2.c3. e4. a5. b</p> <p>Cheating </p> | |
| 3468. |
2. Fill in the blanks.The blood from the heart is transported to all parts of the body by(ii)(ii)iliv)theHaemoglobin is present in cells.Arteries and veins are joined by a network ofThe rhythmic expansion and contraction of the heart is called(v) The main excretory product in human beings is(vi) Sweat contains water and(vil) Kidneys eliminate the waste materials in the liquid form calledWater reaches great heights in the trees because of suction pullcaused by(viil) |
| Answer» <p>1 arteries2 RBC3 blood vessels4 heart beat5 toxic6 salt7 blood8 vascular tissue</p> | |
| 3469. |
STRESS& STRAINA 20 Kg load is suspended by a wire of crosssection 0.4 mm^2. The stress produced in N/m^2is |
| Answer» | |
| 3470. |
4. Why is transport of materials necessary inExplain. |
| Answer» <p>Transport of materialsisnecessaryin both plants and animals as every cell needs a regular supply of nutrients and oxygen for releasing energy through respiration. The food that we eat is broken down into smaller components to be absorbed by the cells.</p> | |
| 3471. |
Why is transport of materials necessary in a plant |
| Answer» <p>Food in plants istranslocatedby phloem. Sieve tubes, the cells of phloem are living structures. In most animals, blood circulates through heart and blood vessels to reach all parts of body. Bloodflowingthrough the body transports food, nutrients, oxygen, hormones, metabolic waste and carbon dioxide.Transport of materialsisnecessary in living organismsas every cell needs a regular supply of nutrients and oxygen for releasing energy through respiration. The food that we eat is broken down into smaller components to be absorbed by the cells.</p> | |
| 3472. |
Intext QuestionsCalculate the potential of hydrogen electrode in contact with a solutionwhose pH is 10. |
| Answer» | |
| 3473. |
Answer Brierty1. Why is transport of materials necessary in organisms? |
| Answer» <p>Transport of materialsisnecessaryin both plants and animals as every cell needs a regular supply of nutrients and oxygen for releasing energy through respiration. The food that we eat is broken down into smaller components to be absorbed by the cells.</p> | |
| 3474. |
Answer Brieflysewhy iw transport of materials necessary ioxrat least one function of each of the follo(b) Heart |
| Answer» <p>Transport of materials is necessaryin organisms as every cell needs a regular supply of nutrients and oxygen for releasing energy through respiration. The food that we eat is broken down into smaller components to be absorbed by the cells.</p> | |
| 3475. |
41 Why is transport of materials necessary in a plant or in an anima?Explain. |
| Answer» | |
| 3476. |
Fill in the blanks1. Arteries and veins are joined by a network of _____2. The rhythmic contraction and expansion of the heart is called _____ |
| Answer» <p>1. Arteries and veins are joined by a networkof capillaries. 2. The rhythmic Contraction and expansion of the heart is called heart beat</p> | |
| 3477. |
4. Why is transport of materials necessary in a plant or in an animal?Explain. |
| Answer» | |
| 3478. |
4. Why is transport of materials necessary in a plant or inan animal?Explain. |
| Answer» <p>this is very long </p> | |
| 3479. |
Why is transport of materials necessary in a plant or in ĂĽn animalExplain.nn nlatelets in the blood? |
| Answer» | |
| 3480. |
What is actinide contraction? |
| Answer» <p>Actinoid contractionis greater from element to element than lanthanoidcontraction. These 5f orbitals have a poorer shielding effect than 4f orbitals (in lanthanoids). </p><p>Thus, the effective nuclear charge experienced by electrons in valence shells in case ofactinoids is much more that that experienced by lanthanoids.</p> <p>thx bro</p> | |
| 3481. |
kosika kise kahte hai |
| Answer» <p>कोशिका (Cell) सजीवों के शरीर की रचनात्मक और क्रियात्मक इकाई है और प्राय: स्वत: जनन की सामर्थ्य रखती है।</p> | |
| 3482. |
Find the sum:3 9fa) T+ T 10 |
| Answer» | |
| 3483. |
(a) 1 M NaCl fa 74.(b) 1 M KCI a(d)1 M C,H120%(c) 1 M AICI, fa |
| Answer» <p>since, the concentration of the given questions is same. One which will give maximum number of Ions will have maximum of freezing point.since AlCl3 will give 4 ions, it will have maximum freezing point.</p><p>ans is (c) option</p> | |
| 3484. |
67./A spring ofspring constant 5 × 103 N m-1 is stretchedinitially by 5 cm from the unstretched position. Thework required to stretch it further by another 5 cm isIAIIMS-2014](A)(C)6.25 N m18.75 N m(B) 1250 N m(D) 25.00 N ml tling hu machine with |
| Answer» <p>W = 1/2*(k)*((x2)²-(x1)²)</p><p>=> w = 1/2*5000*[100-25]/10⁴ = 75/4 = 18.75 Nm</p><p>option C</p> | |
| 3485. |
is it possible for two objects to occupy the same space simultaneously?(Yes /No |
| Answer» <p>No, it is not possible. The laws of physics say thattwo objects cannotoccupy the samespace atthe same time.</p> | |
| 3486. |
The amount of space occupied by matter |
| Answer» <p>The amount of space that matter occupies is called its volume.</p> <p>incorrect</p> | |
| 3487. |
Give two examples each for the method of separation in dailyuse. |
| Answer» <p>There are many kinds ofseparation techniqueswhich we use in our day to daylife, but we rarely ever notice them such as: Filtration, Centrifuging, Decanting, Fractional Distillation and Sieving. Each of thesemethodshas their own specificusesin ourdaily liveswhich make our chores much easier to carry out.</p> <p>Purpose of Separation of Substances</p><p>There are three main reasons why we need to separate mixtures.They are:</p><p>1) To remove unwanted particles</p><p>Abhelis a mixture of various ingredients like onion, tomato, potato, chillies, etc. Someone who does not like spicy food will remove the chillies to prevent mouth burn. Therefore, separation is necessary to remove the chillies from food.</p><p>Your mother always removes stones from rice before she cooks. Because stones are not wanted. Separation is necessary to remove the stones.</p><p>Also, your mother removes the tea leaves from tea using a strainer. We cannot drink tea with the tea leaves. Hence, they are separated.</p><p>Air also contains dirt and dust.We have hair in our nostrils which separate the dust and dirt particles from the air.</p><p>Did you know that the water we drink comes from rivers and lakes? But it contains impurities and germs. They are not wanted. Thus, Separation is necessary to remove these impurities.</p><p>2) To obtain important substances</p><p>Some substances are more important than others in a mixture.Therefore, these need to be obtained by separation of substances.</p><p>We all love butter. We spread it on a bread and eat it. It is used it for cooking. Butter is prepared from milk.The milk is churned at a high speed which creates a froth up. This froth is actually butter. The oil droplets are collected. Thus butter is separated from milk.</p><p>The air around us has many gases. It has oxygen, nitrogen, carbon dioxide, etc. But air also has dust and impurities. The impurities need to be removed so that important gases can be obtained. Oxygen makes up 21% of air. But only oxygen is required for so many things like respiration, burning, etc.There are cylinders present in hospitals which contain only oxygen. They are for the patients who can not breathe on their own. But how does this oxygen come in the cylinder? It has been separated from the air.This is a very important use of separation of substances. Even nitrogen has many uses. Therefore, it is separated from air.</p><p>Crude oil is raw oil. It is a mixture of many oils. It has petrol, diesel, kerosene, paraffin wax. But it also contains impurities.We all know petrol and diesel are used in vehicles. Vehicles cannot run without them. Thus, they have to be separated from the crude oil.</p> <p>thanks</p> | |
| 3488. |
c)e) a segmel!lo differences betweenuare and a rhombusGive twoanve poly gon and a convex polygnncaii) a concave |
| Answer» <p>square: Has 4 right anglesRhombus: has tow opposite internal angles that are equalsquare: sides are perpendicular to each other where rhombus sides are not perpendicular</p> | |
| 3489. |
What is the criterion forclass(fication of organisms asbelonging to kingdom Monera orProtista? |
| Answer» | |
| 3490. |
Aman is a good boy |
| Answer» <p>please write the full question</p> <p>write full questions</p> | |
| 3491. |
. Three consecutive integers are such that when they are taken in increasing ordermultiplied by 2,3 and 4 respectively,they add up to 74. Find these numbes, |
| Answer» <p>Let these Three consecutive numbers are X, Y, andZ.so Y = X+1, and Z = Y+1 = X+2A/q, 2X+3Y+4Z = 74OR, 2X+3(X+1)+4(X+2) = 74OR, 2X+3X+4X+3+8 = 74OR, 9X = 74-11OR, X = 63/9 = 7Therefore numbers are X = 7, Y = 7+1 =8, and Z = 8+1 = 9</p> | |
| 3492. |
28. An object of size 7em is placed at 27em in front of a concave mirror of focal lengthi Scm. Where is the sharp image formed? Find the size and nature of the image. Alsofind the magnification |
| Answer» <p>We know that, for a concave mirror the focal length will be negative.Therefore,given: u = -27cm f = -18cm h(object size) = 7cm</p><p>( Note that the distance at which you will obtain sharp image will be your "v" i.e. the object distance for that image formation which is required in the question)</p><p>hence,1/v + 1/u = 1/f(mirror formula)1/v + (1/(-27)) = 1/(-18)1/v = 1/27 + 1/-18 ( LCM of 18 and 27 is 54)1/v = 1/(-54)v = -54cmimage distance = -54cmhence, image is formed on the same side.</p><p>now we know,h'/h = -v/u(h' denotes object height)h'/7 = -(-54)/-(27)h' = 7 * (-2)h' = -14cm</p><p>hence, image is inverted (since h' is negative) and it is on the same side of that of the object (since v is negative).</p> | |
| 3493. |
Column IColumn ÎAttractionS NRepulstion |
| Answer» <p>N - N -> Repulsion N - S -> Attraction S - N -> Attraction S - S -> Repulsion </p><p>If you find this answer helpful then like it.</p> | |
| 3494. |
tisplaeenColumn I shows different positions in which one pole of a magnethat of the other. Column Il Indicates the resulting action beeach situation. Fill in he blanks4.between them forColumn 1ColumnAttraction5Kepulstion |
| Answer» | |
| 3495. |
Column I shows different pthat of the other clumn I indicates the resulting action between them for4.ositions in which one pole of a magnet is placed near |
| Answer» | |
| 3496. |
4. Column I shows different positions in which onc polc of a magnet is placed nearthat of the other. Column II indicates the resulting action between then fureach situation. Fill in the blanks.Column IColumn IIAttractionRepulstion |
| Answer» | |
| 3497. |
One should not burst crackers near electric poles |
| Answer» <p>Bursting of crackers near poles can lead to fire which can further result in injuries and death. </p> | |
| 3498. |
Why water pipes burst in colder areas duringwinter season? |
| Answer» <p>Water pipes burstbecause thewaterinside them expands is it gets close to freezing, and this causes an increase in pressure inside thepipe. When the pressure gets too high for thepipeto contain, it ruptures.</p> | |
| 3499. |
0 10 b8 3bived completely onA photon is moving with a velocity of light and emit radiations of wavelength3.6 A. What is mass of the photon? |
| Answer» | |
| 3500. |
Why do cycle tyres sometimes burst on hot summer days? |
| Answer» <p>Air expands in area causing the fully air tighttyreto expand more which eventuallyburststhetyre. In normal condition air molecules are close to each other but when air is heated due to hot climate, air molecules moves far from each other causing air to expand</p><p>please hit like button</p> <p>thanks bro</p> | |