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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.
| 1451. |
How are clouds form? |
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| 1452. |
please explain me chapter soil |
| Answer» <p>Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Earth's body of soil is the pedosphere, which has four important functions: it is a medium for plant growth; it is a means of water storage, supply and purification; it is a modifier of Earth's atmosphere; it is a habitat for organisms; all of which, in turn, modify the soil.</p><p>The pedosphere interfaces with the lithosphere, the hydrosphere, the atmosphere, and the biosphere.[1] The term pedolith, used commonly to refer to the soil, translates to ground stone. Soil consists of a solid phase of minerals and organic matter (the soil matrix), as well as a porous phase that holds gases (the soil atmosphere) and water (the soil solution). Accordingly, soils are often treated as a three-state system of solids, liquids, and gases.</p><p>Soil is a product of the influence of climate, relief (elevation, orientation, and slope of terrain), organisms, and its parent materials (original minerals) interacting over time. It continually undergoes development by way of numerous physical, chemical and biological processes, which include weathering with associated erosion. Given its complexity and strong internal connectedness, it is considered an ecosystem by soil ecologists.</p><p>Most soils have a dry bulk density (density of soil taking into account voids when dry) between 1.1 and 1.6 g/cm3, while the soil particle density is much higher, in the range of 2.6 to 2.7 g/cm3.[8] Little of the soil of planet Earth is older than the Pleistocene and none is older than the Cenozoic,[9] although fossilized soils are preserved from as far back as the Archean.</p><p>Soil science has two basic branches of study: edaphology and pedology. Edaphology is concerned with the influence of soils on living things.[11] Pedology is focused on the formation, description (morphology), and classification of soils in their natural environment.[12] In engineering terms, soil is included in the broader concept of regolith, which also includes other loose material that lies above the bedrock, as can be found on the Moon and other celestial objects, as well.[13] Soil is commonly referred to as earth or dirt; technically, the term dirt should be restricted to displaced soil.</p> <p>aap ise thoda hindi me kaha sakte ho</p> <p>I mean samajha sakte ho</p> | |
| 1453. |
A retailer sells a microwave oven for ₹6,400. There is a 25% profit on the cost price. How much did the retailer pay for the microwave oven? |
| Answer» <p>cost price is 5120</p> <p>thankyou</p> | |
| 1454. |
Transmission lines transmit a voltage of V voltto our houses from power stations, then the powerP supplied by them is proportional to(b) V(c) 12(d) y |
| Answer» <p>P=V^2/Rhence the power is directly proportional to V^2</p> | |
| 1455. |
) A tube open at both ends has fundamentalfrequency 'n'. If one end of the tube is dipped inwater to half of its length, what would be itsfundamental frequency? |
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| 1456. |
If $\vec{P}=2 \hat{i}+3 \hat{j}-\hat{k}$ and $\vec{Q}=2 \hat{i}-5 \hat{j}+2 \hat{k}$find $(i) \vec{P+Q}$ (ii) $3 \vec{P}-\vec{2 Q}$ |
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| 1457. |
64Themeanlifeofaradioactivesubstanceis100years. Its half life will be |
| Answer» <p>Half life=mean life*ln2=100*ln2 =69.3 years</p> | |
| 1458. |
82.Latest technique for purification, isolation and separation of organic compound is;1) chromatography 2) steam distillation 3) crystallisation 4)vacuum distillation |
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| 1459. |
What is the principal of fractional distillation |
| Answer» <p>Theprinciple of fractional distillationis that different liquids boil at different temperature. The miscible liquids boil at different temperature and evaporate at different temperature. When the mixture is heated, the liquid with lower boiling point boils and turns into vapours.</p> | |
| 1460. |
change.2. Distillation of petroleum to form petrol is a |
| Answer» <p>It is a chemical change and is irreversible change.</p> | |
| 1461. |
Ä°Shaul thatshan elevaled Vaiheet atines aari angoleal |
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| 1462. |
elements.le names of the ions of the following elements. Also write their representation.(a) Beryllium(b) Sodium(c) Magnesium(d) Calcium(e) Fluorine(f) Phosphorus(g) Sulphur(h) Chlorine |
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| 1463. |
plants, water is transported through? |
| Answer» <p>xylem is used for transport in plants.</p> | |
| 1464. |
(a) Cooking utensils are made of metals. |
| Answer» <p>cooking utensils are made of metals= narrow range</p> <p>metals is the correct answer of the given question</p> <p>Cooking utensils are made up of Metal because metals are good conductor of heat they allow heat to pass through them. </p> <p>True...........................</p> <p>true....................... </p> <p> it is because metals are good conductors of heat snd electricity thats why cooking utensils are made of metals </p> | |
| 1465. |
(4) Copper and brass utensils should be tinned. |
| Answer» <p>Copper and brass utensils should be tinned to prevent rusting. Air and water exposure causes them to form rust.</p><p>Please hit the like button </p> | |
| 1466. |
) Copper and brass utensils should be tinned. |
| Answer» <p>Copper and brass utensils form rust when exposed to water and air. To prevent rusting, these utensils must be tinned. </p><p>Please hit the like button</p> | |
| 1467. |
.7. Why don't we use steel handles in utensils? |
| Answer» <p>Woods and plastics are bad conductors of heat and electricity. When we are cooking, we are basically dealing with heat and moreover if we are using induction ovens and heaters for cooking,we are also dealing with electricity.So just to protect us from heat and shock, cooking utensils use wooden or plastic handles.</p> | |
| 1468. |
5. Tick the correct answer:In cockroaches, air enters the body through) lungs(ii) spiracles(a)(ii) gills(iv) skin |
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| 1469. |
Light enters from air to kerosene having refractive index of 1.47. Whatlight in kerosene, if the speed of light in air is 3x10^5 m/s?is the |
| Answer» <p>R.I.= speed of light in air/speed of light in Medium1.47 = 3×10^8/Speed of light in kerosenespeed of light in kerosene= 3×10^8/1.47speed of light in kerosene= 2.04×10^8m/s</p> | |
| 1470. |
what is the cause of night blindness |
| Answer» <p>Night blindness caused by nearsightedness, cataracts, or vitamin A deficiency is treatable. Corrective lenses, such as eyeglasses or contacts, can improve nearsighted vision both during the day and at night. </p> | |
| 1471. |
2IL OF MIRBANE FOF MuLA |
| Answer» <p>Nitrobenzene is also used to mask unpleasant odors in shoe and floor polishes, leather dressings, paint solvents, and other materials. Redistilled, asoilofmirbane, nitrobenzene had been used as an inexpensive perfume for soaps.</p> | |
| 1472. |
1. If three resistors having resistances 2 S2, 3 2 and 5 S2 are connected in parallel, then will the value of the totalresistance be less than 2 S2, or greater than 2 12 or lie between 2 22 and 5 12 ? Explain.(3) |
| Answer» <p>resistance will less than 2</p> <p>answer will be less than 2 ohm</p> <p>mm cm is the answer correctly </p> | |
| 1473. |
Muscular fatigue is a state of emergency. Why? |
| Answer» <p>Muscle fatigue is a symptom that decreases your muscles' ability to perform over time. It can be associated with a state of exhaustion, often following strenuous activity or exercise.</p> | |
| 1474. |
makesyour fist. Your heart is roughthe size of your fist.What will happen if the blood richoxygen and the blood rich in carbodioxide mix with each other? To avofrom happening, the heart has fothis |
| Answer» <p>In the lung capillaries, the exchange of carbon dioxide and oxygen takes place.The right side of the heart collects carbon di oxide rich blood and after getting into lungs it picks up oxygen and become oxygen rich blood and the left side of the heart collects it and pumps into parts of the body.The one-way valves present in the heart prevents any backward flow of blood, sooxygen rich and carbondioxide rich blood cannot be mixed with each other.ButIf due to any abnormality blood starts flowing the wrong way, the blood gases (oxygen and carbon dioxide) might mix, which can cause serious threat to the body.</p> <p>what is the your name</p> | |
| 1475. |
what is bar graph |
| Answer» <p>Ans :- A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A bar graph shows comparisons among discrete categories.</p> <p>thanks</p> | |
| 1476. |
carbonic acid what is the formula |
| Answer» <p>Carbonic acid is a chemical compound with the chemical formula H2CO3</p> <p>thank u</p> | |
| 1477. |
a. When the gas formed on heatinglimstone is passed through freshlyprepared lime water, the lime waterturns milky |
| Answer» <p>Here is the answer----</p><p>The Gas formed on heating limestone is Carbon dioxide. When this gas is passed through lime water, it forms Calcium Carbonate or limestone which turns milky.</p><p>Reaction for the above is---When Limestone is heated, CaCO₃ --------Heat------- CaO + CO₂.(limestone)</p><p>When Carbon Dioxide is passed through lime water,</p><p> CO₂ + Ca(OH)₂ ------------- CaCO₃↓ + H₂O. (lime water)</p><p>Reason ⇒When Carbon dioxide is passed through Lime water or Calcium Hydroxide, it turns milky due to the formation of the Precipitate of the insolublemilky Calcium Carbonate.</p> | |
| 1478. |
\frac { 7 } { 10 } \text { from } 4 \frac { 1 } { 15 } |
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| 1479. |
Calculate EMS velocity of oxygen at 0°C |
| Answer» <p>The answer for this question is 46140 cm/s</p> <p>Gases consist of atoms or molecules that move at different speeds in random directions. The root mean square velocity (RMS velocity) is a way to find a single velocity value for the particles.The average velocity of gas particles is found using the root mean square velocity formula</p><p>μrms= (3RT/M)½</p><p>whereμrms= root mean square velocity in m/secR= ideal gas constant= 8.3145 (kg·m2/sec2)/K·molT =absolute temperaturein KelvinM = mass of a mole of the gas inkilograms.</p><p>Really, the RMS calculation gives youroot mean square speed, not velocity. This is because velocity is a vector quantity, which hasmagnitude and direction. The RMS calculation only gives the magnitude or speed.</p><p>The temperature must be converted to Kelvin and the molar mass must be found in kg to complete this problem.</p><p>Step 1Find the absolute temperature using the Celsius to Kelvin conversion formula:</p><p>T = °C + 273T = 0 + 273T = 273 K</p><p>Step 2Find molar mass in kg:</p><p>From theperiodic table, molar mass ofoxygen= 16 g/mol.</p><p>Oxygen gas(O2) is comprised of two oxygen atoms bonded together. Therefore:</p><p>molar massof O2= 2 x 16molar mass of O2= 32 g/mol</p><p>Convert this to kg/mol:</p><p>molar mass of O2= 32 g/mol x 1 kg/1000 gmolar mass of O2= 3.2 x 10-2kg/mol</p><p>Step 3- Find μrms</p><p>μrms= (3RT/M)½μrms= [3(8.3145 (kg·m2/sec2)/K·mol)(273 K)/3.2 x 10-2kg/mol]½μrms= (2.128 x 105m2/sec2)½μrms= 461 m/sec</p><p>Answer:</p><p>The average velocity or root mean square velocity of a molecule in a sample of oxygen at 0 °C is 461 m/sec.</p> | |
| 1480. |
A series LCR circuit with R-20 Ω, L 1.5 H and C-35 μF is connectedto a variable-frequency 200 V ac supply. When the frequency of thesupply equals the natural frequency of the circuit, what is the averagepower transferred to the circuit in one complete cycle?7.9 |
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| 1481. |
Find the focal length of a convex mirror whose radius of etrvature is32 cm |
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| 1482. |
10.4 Find the radius of curvature of a convex mirror withfocal length 32 cm. |
| Answer» <p>radius of curvature= 2×focal length = 2×32 cm= 64cm </p> <p>Given,</p><p>focal length= 32 cm</p><p>we know that,</p><p>radius of curvature= 2 × focal length</p><p>radius of curvature= 2 × 32</p><p>radius of curvature= 64 cm</p> <p>64 is the correct answe r</p> | |
| 1483. |
xamName:A2/T1/BGHSubject○Question: PhysicsPhysicssetSection A - Answer the following for 1 Mark(1) Two masses mi 5 kg and m)-12 kg tied to a string. are hanging overnccelerntion of the masses when they are left free to move.1051a light frictionless pulley. What is the |
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| 1484. |
How many set of chromosome |
| Answer» <p>In humans, each cell normally contains23 pairsof chromosomes, for a total of46. Twenty-twoof these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.</p> | |
| 1485. |
Find the equivalent fraction of witha. Denominator 15 b. Numerator-c. Denominator 18 d. Numerator 508 |
| Answer» <p>a) 10/15</p><p>b) 8/12</p><p>c) 12/18</p><p>d) 50/75</p> | |
| 1486. |
z. Write any three ways to reduce food waste. |
| Answer» <p>1. Cook only when needed. 2. Store leftover food to use again</p><p>3. Shop only nessecary items.</p> <p>THANKU</p> | |
| 1487. |
write any three points about real image |
| Answer» <p>1.A real image can be caught on a screen 2. A real image is always inverted 3. A real image is formed when the rays of light after reflection or refraction actually meet at some point </p> | |
| 1488. |
Which pair of gases diffuses with same rate through an orifice) NO, CO(2) CH, 02(3) NO2, CO2 |
| Answer» <p>The answer is Option 4.</p> | |
| 1489. |
1.of SentenmandC. Fill in the blanks.a carbohydrate, gives us instant energy.2. Food with all theis called a balanced diet.3. Fats remainin our body for later use.4. Vitamins and minerals are needed by our body inJativequestquantitymative |
| Answer» <p>protein nutrientsstoredLarge</p> <p>proteinnutrientsstoredlarge</p> | |
| 1490. |
What is Excretion? |
| Answer» <p>The process by which unwanted substances from human body gets eliminated is known as Expression.</p> <p>The process of removing the waste,formed as a reasult of metabolic activities inside the body,is called excreation</p> <p>the process of removing waste substance from the body is called excretion</p> <p>Excretion is the process in which the waste materials from our body gets removed.</p> <p>the process of removing toxic waste in our body is called excretion</p> <p>It is the metabolic process of removal of unwanted and harmful substances from our body</p> <p>excretion is a process from which removal of metabolic waste happens</p> <p>The process of removing of waste material or extra material from our body is called excretion.</p> <p>A process in which waste products have been removed from our body takes place is called excretion.</p> <p>the process of eliminating or expelling waste matter.</p> <p>the process of eliminating or expelling waste materials</p> <p>excretion is the process of removing metabolic waste from living being</p> <p>the process of removing toxic waste from the body is called as excretion</p> <p>excretion is process by which removed the waste productsis called excretion</p> <p>it is a metabolic process of removing waste from body</p> <p>the removal of toxic waste from living organisms</p> <p>The process of removal of wastes from the cells of living organisms is called excretion</p> <p>Excretion is the process in which the waste material of our body reveals in the form of urine,potty or vomiting. </p><p>I hope this answer help u . </p> <p>the process of ercreating waste materials from our body</p> <p>Excretion is the process by which waste material remove from our body ... this is last process of digestion . .</p> | |
| 1491. |
Short Answer Questions Type-I (Answer in one or two sentences)1. In which direction does air exert maximum pressure?2. What causes lightning during a thunderstorm?E |
| Answer» <p>1.Air or any fluid for that matter would exert force (due to pressure) normal to thesurfaceit is in contact with. A fluid can exert force tangent tosurfacein contact only when the fluid is in motion via viscosity. Yes gravity does exert a downward force on air.</p><p>2.Lightningis produced inthunderstormswhen liquid and ice particles above the freezing level collide, and build up large electrical fields in the clouds. ... Thelightningspark can occur between clouds, between the cloud and air, or between the cloud and ground.</p> | |
| 1492. |
cl2]さ(edsedking logt to the both sido |
| Answer» <p>sorry we are currently working on questions posted in english</p> | |
| 1493. |
4. Write differences between friction and gravity |
| Answer» <p>(i) Friction is the force that opposes the sliding motion. Gravity is the natural force exerted between two objects, drawing them toward each other.</p><p>(ii) Gravity always pulls objects. Friction, however, doesn’t pull objects down.</p><p>(iii) Unlike gravity, friction doesn’t rely on a natural force. Instead, friction occurs when something like a machine or individual pulls a sliding object in the opposite direction of another object.</p><p>(iv) Friction always acts parallel to the surface in contact because of the sliding action. Gravity acts perpendicular downwards.</p> | |
| 1494. |
What is excretion. State its significance |
| Answer» <p>Excretionistheprocess by which metabolic wastes and other non-useful materials are eliminated from an organism.Importanceifexcretion.Excretionis an essential process in which waste products are removed fromthebody. Withoutexcretion, waste products build up inthebody and cause serious health issues.</p> | |
| 1495. |
.The emf of a cell is always greater than its terminal voltage. Why? Give reason |
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| 1496. |
Explain how Spirogyra multiplies. |
| Answer» <p>Spirogyracan reproduce both sexually and asexually. In vegetative reproduction, fragmentation takes place, andSpirogyrasimply undergoes the intercalary mitosis to form new filaments.</p><p>Sexual Reproduction is of two types:</p><p>Scalariform conjugation requires association of two different filaments lined side by side either partially or throughout their length. One cell each from opposite lined filaments emits tubular protuberances known as conjugation tubes, which elongate and fuse, to make a passage called the conjugation canal. The cytoplasm of the cell acting as the male travels through this tube and fuses with the female cytoplasm, and the gametes fuse to form a zygospore.</p><p>In lateral conjugation, gametes are formed in a single filament. Two adjoining cells near the common transverse wall give out protuberances known as conjugation tubes, which further form the conjugation canal upon contact. The male cytoplasm migrates through the conjugation canal, fusing with the female. The rest of the process proceeds as in scalariform conjugation.</p> | |
| 1497. |
what is dc current |
| Answer» <p>DC current means direct current which is a constant current .it always flows in one direction</p> <p>DC (direct current) is the unidirectional flow or movement of electric charge carriers stays the same at all times. As an adjective, the term DC is used in reference to voltage whose polarity never reverses.</p> <p>Direct current is the unidirectional flow of an electric charge. A battery is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams</p> <p> DC is the.unidirectional flow or movement of electric charge carrier stay the same at all times</p> <p>DC current means direct current which is a constant current . it always flows in one direction</p> | |
| 1498. |
Write Lewis dot symbols for atoms of the following elements : Mg, Na, B. O, N. BrWrite Lewis symbols for the following atoms and lons: |
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| 1499. |
3. What happens for three reasons - survival, food and security? |
| Answer» <p>Food security is a measure of the availability of food and individuals' accessibility ..... The WHO states that there are three pillars that determine food security: food availability, food</p> | |
| 1500. |
Define Chipko movement.. |
| Answer» <p>The Chipko movement or Chipko Andolan is a movement that practiced the Gandhianmethods of satyagraha and non-violent resistance. This is mainly done through the act of hugging trees to protect them from being cut down. This was first started by Amrita Devi while protesting against a King's men to cut the tree.</p> <p>the chipko movement or chipko andolan is a move ment that practiced the Gandhian methods of satyagraha and non-violent resistance.This is mainly done through the act of hugging trees to protect them from being cut down. This was first started by Amrita Devi while protesting against a king's man to cut the tree</p> <p>chipka movement is a great movement in this moment women and child hug tree to save form cutters </p> | |