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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.
| 1051. |
What is meant by excretion ? Explainthe process of formation of urine. |
| Answer» <p>The elimination by an organism of waste products, such as carbon dioxide and urea, resulting from metabolic processes. Higher animals have specific organs of excretion, such as the lungs and kidneys. In plants and many lower organisms, waste is eliminated by diffusion to the outside environment.</p> <p>Urine formation occurs in the kidney in three stages:filtration,reabsorption, andsecretion.</p><p>Filtration</p><p>Stage 1: filtration. Thekidneyis the body's blood filtering system. Blood vessels visit the kidney and enter a special ball of capillaries called theglomerulus. The glomerulus is nestled within a region of the kidney called theBowman's Capsule. This is where filtration occurs. As blood is pushed through the tiny capillaries, the high-pressure forces some things to pass through the capillary walls. The walls act as a sieve or a filter. Hence, it is called filtration.</p><p>Water, sugar, salts, amino acids, nitrogenous wastes, and other tiny things enter the kidney as a substance called thefiltrate. Cells and large blood proteins that cannot fit through remain in the blood vessels. The filtrate entering the kidney is like pre-pre-urine.</p><p>Reabsorption</p><p>Stage 2: reabsorption. The filtrate enters the kidney in the proximal tubule. This region of the kidney is special because many things can be removed from the filtrate. These valuable things are recollected, or reabsorbed, by the body.</p><p>Glucose, certain salts, vitamins, hormones, and amino acids are restored to the body and will not be included in urine. Sometimes, if the body has too much of something then the extra sugar or salt will stay in the filtrate. For example, diabetics with high levels of blood glucose may have glucose in their urine since it cannot all be reabsorbed. The filtrate after reabsorption is like pre-urine</p><p>Secretion</p><p>Stage 3: secretion. The filtrate then passes through a really neat structure called theLoop of Henlewhere it gains and loses water and salt. As it leaves the Loop of Henle, it enters thedistal tubule, where secretion occurs.</p> | |
| 1052. |
D. CHOOSE THE CORRECT ANSWER1. During a physical change(a) energy is evolved(c) colour, shape or state are changed(b) new substance is formed(d) light is produced |
| Answer» <p>my answer is = (a). what is right and.?</p> <p>Option ( C ) is correct answer. Please like me. </p> <p>Option C is correct answer</p> <p>Thanks for your like I also like you</p> <p>c is the answer of the following</p> <p>option c is the correct answer of the given question</p> <p>option (c) is the right answer</p> <p>option C is the correct answer </p> | |
| 1053. |
Jud ,ate.hatrdhet ie lÇb2ees |
| Answer» <p>Synthetic fibers are fibers made by humans with chemical synthesis, as opposed to natural fibers that humans get from living organisms with little or no chemical changes. They are the result of extensive research by scientists to improve on naturally occurring animal fibers and plant fibers.</p> <p>Specialty synthetic fibers include:</p><p>Rayon (1894) artificial silk.</p><p>Vinyon (1939)</p><p>Saran (1941)</p><p>Spandex (1959)</p><p>Vinalon (1939)</p><p>Aramids (1961) - known as Nomex, Kevlar and Twaron.</p><p>Modal (1960's)</p><p>Dyneema/Spectra (1979)</p> <p>on a field 55m long and 22m wide square shaped mattresses have to be spread out.find out the minimum number of same size mattresses that would be need to cover field</p> | |
| 1054. |
what is velocit |
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| 1055. |
write configuration of sodium |
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| 1056. |
(ii) Mention any two uses of acids. |
| Answer» <p>There are numerous uses for acids. Acids are often used to remove rust and other corrosion from metals in a process known as pickling. They may be used as an electrolyte in a wet cell battery, such as sulfuric acid in a car battery. Strong acids, sulfuric acid in particular, are widely used in mineral processing.</p> <p>Thanks dear</p> | |
| 1057. |
11.An element with configuration 1s2 2s22p6 3s23ps is(A) trivalent(B) tetravalent(C) pentavalent(D) both A & C |
| Answer» <p>There must be also15protonsin the element's nucleus. And thus ifZ=15, the element must bephosphorus. it is a pentavalent compound</p> | |
| 1058. |
9 The frequency of a source of sound is 100 Hz. How mandoes it vibřate in a minute? |
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| 1059. |
1. The experimental curve obtained when the rate of a reaction is plotted against time, appeared paraliel to tetime axis after sometime in a reaction. This indicates that(A) the reaction is stopped(C) concentration of the reactant is negligible(B) equilibrium is established(D) the reaction is complex |
| Answer» <p>this is an indication of equilibrium has established as the no of products and reactants become equal on both sides.</p> | |
| 1060. |
Which are the natural materialsobtained from plants andanimals ? |
| Answer» <p>crops for food obtained from plantsleather from animals Plant and animal fibres. 1) Cotton: Cotton fibre is obtained from the cotton plant. 2) Linen: Linen fabric is obtained from the flax plant. 3) Jute: Jute is a natural fibre that has been used in the textile industry since centuries. 4) Silk: Silk, again, is a natural fibre used in the textile industry since</p> | |
| 1061. |
8 NH _ { 3 } + 3 Cl _ { 2 } \rightarrow |
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| 1062. |
Sounds of Animalsand cres Many species use a variety of sounds for different purposesTick the name of the sounds made by the following animals.to communicate between thhemselves, to frighten their enetallksnortbuzzbleatlaughtrillhowlmoosingsereamhumhumbuzzbellowcuckoogibberbark |
| Answer» <p>Giraffe - bleatDeer - snortEagle - screamRhinocerous - bellowSwan - cry</p> | |
| 1063. |
(b) Punch marked coins were made of:1. silver2. gold3. tin4. ivory |
| Answer» <p>Thecoinsof this periodwere punch-marked coinscalled Puranas, Karshapanas or Pana. Earlycoinsof India (400 BCE – 100 CE)were made of silver and copper, and bore animal and plant symbols on them.</p><p>The answer is option A</p> | |
| 1064. |
Detre Compast pestisidesine |
| Answer» <p>Composting is an aerobic method (meaning that it requires the presence of air) of decomposing organic solid wastes. It can therefore be used to recycle organic material. The process involves decomposition of organic material into a humus-like material, known as compost, which is a good fertilizer for plants.</p><p>Pesticides are substances that are meant to control pests, including weeds.</p> | |
| 1065. |
2.What is condensation ? |
| Answer» <p>Condensation is the process by which water vapor in the air is changed into liquid water.</p> | |
| 1066. |
rmfoExplain the functions of a seed.下21-4007 ©HOTS (Higher Order Thinking Skills)do flowers have brightly coloured petals?what way do the spines of prickly poppy anWhy2.In3 A sapling cannot be considered a herb. Justif |
| Answer» <p>Brightly colored flowers attract different insects to come visit the flower. When insects like bumblebees perch on a flower's petals looking for nectar, pollen gets stuck to their bodies. When insects fly off to another flower, the pollen is transferred to the new flower.</p> <p>thanks</p> | |
| 1067. |
Name four common sources of light. |
| Answer» <p>Natural sources of light include thesun, stars, fire, andelectricityin storms. There are even some animals andplantsthat can create their own light, such as fireflies, jellyfish, andmushrooms. This is called bioluminescence. Artificial light is created by humans.</p> | |
| 1068. |
ou Connectreaton |
| Answer» <p>so,</p><p>1/RP= 1/2 + 1/3 + 1/6</p><p>or</p><p>1/RP=(3 + 2 + 1)/6 = 6/6</p><p>thus, equivalent resistance is parallel is</p><p>RP= 1 ohms</p> <p>This relationship results in a totalresistancethatis lessthan the smallest of the individualresistances. Whenresistors areconnected inparallel, more current flows from the source than would flow for any of them individually, so the totalresistance is lower.</p> | |
| 1069. |
A piece of wire is bent in the shape of an equilateral triangle each of whose sidesmeasures 8.8 cm. This wire is rebent to form a circular ring. What is the diameter ofthe ring ? |
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| 1070. |
1.Why are solar panels used in artificial satellites? |
| Answer» <p>In order to provide energy solar cell panels used in artificial satellites/space stations because the satellites require energyto revolve or to send the information to earth and there is no other way to give energy to theseartificial satellites from earth.Solar energy can easilybe used by these satellites via the sun as the sun will be in its place all the time.</p> | |
| 1071. |
In CID serial (on TV), Abhijeet fires a bullet of mass 100 g with a speed of 100 ms-1 on a softplywood of thickness 4 cm. The bullet emerges with 10% of its initial KE. Find the emergentspeed of the bullet. |
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| 1072. |
e Find out in which states these languages are spoken?Language here it is spoken (State)MalayalamKonkaniMarathiGujaratiKannada |
| Answer» <p>kerela, Goa, Maharashtra,Gujrat, Karnataka</p> <p>kerela,Goa , Maharashtra Gujarat,kannad</p> <p>Karnataka not Kannad</p> <p>Kerala,Goa, Maharashtra, Gujarat, Karnataka</p> | |
| 1073. |
2. First Indian to travel to space is .a) Sunita Singhc) Rakesh Sharmab) AP] Abdul Kalamd) of these |
| Answer» <p>The first Indian travel to space ..Rakesh sharma </p> | |
| 1074. |
Date,Page0)--A.wan e-ă§ä¸prepp?afethito t veritelourot ade aSaa. |
| Answer» <p>At t = t0, g(x, t0) = A sin (x/a) …(1)</p><p> For a wave traveling in the positive x-direction, the general equation is given by- y = f(x/a – t/T) Putting t = –t0 and comparing with equation (1), </p><p>we get ⇒ g(x, 0) = A sin {(x/a) + (t0/T)} ⇒ g(x, t) = A sin {(x/a) + (t0/T) – (t/T)} As T = a/v (a = wave length, v = speed of the wave) ⇒ y = A sin (x/a + t0/(a/v) – t/(a/v)) = A sin (x + v(t0 - t)/a) ⇒ Y = A sin [x – v(t – t0/a)]</p> | |
| 1075. |
) What do you mean by network? |
| Answer» <p>A network, in computing, is a group of two or more devices that can communicate. In practice, a network is comprised of a number of different computer systems connected by physical and/or wireless connections.</p><p> Regardless of scope, all networks allow computers and/or individuals to share information and resources.</p> <p>A network, in computing, is a group of two or more devices that can communicate. In practice, a network is comprised of a number of different computer systems connected by physical and/or wireless connections. ... Regardless of scope, all networks allow computers and/or individuals to share information and resources.</p> | |
| 1076. |
408 |
| Answer» <p>408 is divisible by 4 and 8 is the correct answer of the given question</p> <p>this is funny question </p> <p>what is your question </p> <p>How can I help you ??</p> | |
| 1077. |
Why are coils of electric toasters and electric irons made of an allrather than a pure metal? |
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| 1078. |
A train starting from a railwaystation and moving with uniformacceleration attains a speed40 km h1 in 10 minutes. Find itsacceleration. |
| Answer» <p>thanks</p> | |
| 1079. |
electric iron consumes energy at a rate of 840 W when heating iaAnat the maximum rate and 360 W when the heating is at the minimumThe voltage is 220 V. What are the current and the resistance in eachase |
| Answer» <p>At maximum heating, power is P = 840 W</p><p>We know, P = V^2/R</p><p>=> R = V^2/P</p><p>Working voltage is 220 V</p><p>So, resistance at maximum heating is = 220^2/840 = 57.6 Ω</p><p>The current is found as, I = P/V (since, P = VI)</p><p>So, current at maximum heating is = 840/220 = 3.8 A</p><p>At minimum heating, power is = 360 W</p><p>The resistance at minimum heating will be = 220^2/360 = 134.4 Ω</p><p>The current at minimum heating will be = 360/220 = 1.6 A</p> | |
| 1080. |
a) Kerosene burns with a blue flame in a wick stove but produces a yellow flame when burnt in a lamp. |
| Answer» <p>Partial combustion is due to lack of oxygen for burning. But in wick -stovekerosene burns with blue flame. Because in kerosene wickstovea perforated cylinder is placed around the burning wicks. Through these holes air is supplied continuously hence the keroseneoilvapour burns completely and produces blue flame.</p> | |
| 1081. |
2, Classify the objects or materials given below as opaque, transparent ortranslucent and luminous or non-luminous:Air, water, a piece of rock) a sheet of aluminium, a mirror; a wooden board) aolythene,a CD) smoke, a sheet of plane glass) fog, a piece of red hotiron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paperthe flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet ofcellophane, a wire mesh, kerosene stove, sĂźn, firefly, moon. |
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| 1082. |
ssily theastcent and luminous or non luminous:he objects or materials given below as opaque, transparent osa piece of rock, a sheet of aluminium, a mirror, a wooden boarpolythene, a CD, smoke, a aheet of plane glass, log, a piece of red hotron, an umlbrella, a tishted luorescent tube, a wall. a sheet of corbon paperthe lame of a gas burner, a sheet of cardboard. a lighted toreh, aue stove, sun, ftretly. moon |
| Answer» <p>Nice answer</p> | |
| 1083. |
xample 8.2 The odometer of a car reads2000 km at the start of a trip and2400 km at the end of the trip. If thetrip took 8 h, calculate the averagespeed of the car in km h^-1 and ^-1 |
| Answer» <p>Thanks </p> | |
| 1084. |
1. Themuscles are present between the ribs. |
| Answer» <p>The intercostal muscles are present between the ribs.</p> <p>Intercostal muscles is the right answer.</p> <p>intercostal muscles is the best answer</p> <p>Intercostal muscles is the best answer </p> <p>the inter costal muscles are present between ribs </p> <p>the intercostal muscles are present between the job</p> <p>inter costal muscles is the correct answer of the given question</p> <p>intercostal is correct answer.</p> <p>The INTERCOSTAL muscles are present between the ribs. </p> <p>Intercoastal muscles is correct answer</p> <p>intercoastal muscles are present between the ribs</p> | |
| 1085. |
what are aquatic plants |
| Answer» <p>Aquatic plants are plants that have adapted to living in aquatic environments. They are also referred to as hydrophytes or macrophytes. A macrophyte is an aquatic plant that grows in or near water and is either emergent, submergent, or floating, and includes helophytes.</p> | |
| 1086. |
5. Explain why, aquatic plants have very short and small roots |
| Answer» <p>Theirrootsaresmallersowatercan spread freely and directly into the leaves. ... Example:Waterstarwort submerged inamarshpond.</p> | |
| 1087. |
,00 Plants. â Deer â Llon.Q3. Magnesium liberates Hydrogen gas when reacted with dil. HCI acid,Q4. a) Write one difference between Roasting and Calcination1000Jwhere as Copper cannot. Write chemical equation and give reason forthis chemical reaction.it why? |
| Answer» <p>The position of zinc in the reactivity series is above hydrogen whereas that of copper is below hydrogen. It means that zinc oxidises (loses electrons) more easily than hydrogen whereas copper does not do so. </p><p>So, copper does not displace hydrogen from dilute acids.</p><p>Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)</p><p>Like my answer if you find it useful!</p> | |
| 1088. |
Which property of DNA double helix led Watson and Crick to hypothesissemi-conservative mode of DNA replication? Explain. |
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| 1089. |
81. A boychews 100 g of ice in 5 minute. If latent heat of ice is80 cal/sec, his power is:(a) 56 W(b) 28 W(d) 224 W(c) 112 W |
| Answer» <p>Total energy = 80*100</p><p>cal=80000*4.2 = 336KJ</p><p>Power=336/(5*60) = 112W</p> | |
| 1090. |
A boy chews 100 gof ice in 5 minute. If latent heat of ice is0 cal/sec, his power is:(a) 56 Wc) 112 W(b) 28 W(d) 224 W |
| Answer» <p>total energy =80*100 cal=80000*4.2=336KJ</p><p>power=336/(5*60)=112W</p> <p>complete describe it</p> | |
| 1091. |
tibia |
| Answer» <p>theinnerofthetwobonesoftheleg,thatextendfromthekneetotheankleandarticulatewiththefemurandthetalus;shinbone.</p> | |
| 1092. |
1, Define the term tissue2. How many types od elements together make up the xylem tissue?Name them.3. How are simple tissues diferent from complex tissues in plants?4. Differentlate between parenchyma, collenchyma andsclerenchyma on the basis of their cell wall.What are the functions of the stomata?5. |
| Answer» <p>In biology,tissueis a cellular organizational level between cells and a complete organ. Atissueis an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multipletissues</p><p>Xylemis one of the two types of transporttissuein vascular plants, phloem being the other. The basic function ofxylemis to transport water from roots to shoots and leaves, but it also transports nutrients.</p> | |
| 1093. |
Collenchyma |
| Answer» <p>Collenchyma tissue is composed of elongated cells with irregularly thickened walls. They provide structural support, particularly in growing shoots and leaves. Collenchyma tissue makes up things such as the resilient strands in stalks of celery.</p> | |
| 1094. |
7.Chloroplasts |
| Answer» <p>Chloroplastsareorganelles, specialized compartments, inplantandalgalcells. The main role of chloroplasts is to conductphotosynthesis, where the photosynthetic pigmentchlorophyllcaptures theenergyfromsunlightand converts it and stores it in the energy-storage moleculesATPandNADPHwhile freeingoxygenfrom water. They then use the ATP and NADPH to make organic molecules fromcarbon dioxidein a process known as theCalvin cycle. Chloroplasts carry out a number of other functions, includingfatty acid synthesis, muchamino acidsynthesis, and theimmune responsein plants. The number of chloroplasts per cell varies from one, in unicellular algae, up to 100 in plants likeArabidopsisandwheat.</p> | |
| 1095. |
What do you understand by chloroplasts ? |
| Answer» <p>Chloroplasts areorganelles found in plant cells and eukaryotic algae that conduct photosynthesis.Chloroplastsabsorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant.</p> | |
| 1096. |
Name the regions in which parenchyma tissue is present. |
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| 1097. |
Give two examples of situations in which applied force causes a change inthe shape of an object.2. |
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| 1098. |
Define the following.a. Forceb. Frictional force |
| Answer» <p>a) Force can be defined as a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object. It causes objects to accelerate or add to their overall pressure.</p><p>b) Frictional Force refers to the force generated by two surfaces that contacts and slide against each other. These forces are mainly affected by the surface texture and amount of force impelling them together. The angle and position of the object affect the amount of frictional force.</p> | |
| 1099. |
7. Explain the process of tissue culture |
| Answer» <p>nice thanks</p> | |
| 1100. |
A block of mass m is kept on a horizontal table. If thestatic friction coefficient is μ, find the frictional forceacting on the block. |
| Answer» | |