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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.
| 3201. |
Sorting materials into groups Q1) short define:-1) Hardness2) Lustre3) Colour |
| Answer» <p>Hardnessis a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.</p> <p>Lustre is a thin coating containing unoxidized metal which gives an iridescent glaze to ceramics.</p> <p>Colour is the property possessed by an object of producing different sensations on the eye as a result of the way it reflects or emits light.</p> | |
| 3202. |
Q14. Explain the formation of scum when hard water is treated with the soap? |
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| 3203. |
how does an earthquake occur |
| Answer» <p>earthquake occur due to the disturbances in earth's surface and also due to the movement in the earth's plate</p> | |
| 3204. |
.Define blood.[Refer Q1,P.37]2. Describe composition of bloodRafar 02.P 371 |
| Answer» <p>the red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body.</p> <p>Composition of blood</p><p>Blood is classified as a connective tissue and consists of two main components:</p><p>Plasma, which is a clearextracellularfluid</p><p>Formed elements, which are made up of the blood cells andplatelets</p><p>The formed elements are so named because they are enclosed in a plasma membrane and have a definite structure and shape. All formed elements are cells except for the platelets, which are tiny fragments of bone marrow cells.</p><p>Formed elements are:</p><p>Erythrocytes, also known as red blood cells (RBCs)</p><p>Leukocytes, also known as white blood cells (WBCs)</p><p>Platelets</p> <p>thanks</p> | |
| 3205. |
. Final momentum Initial momentumHence, total momentum in a collision |
| Answer» <p>please specify the question as well</p> | |
| 3206. |
EINSTEIN'S PHOTOELECTRICEQUATION |
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| 3207. |
Who discovered that a wire conveying current was able to deflect a pivoted magneticneedle?(a) Hans Christian Oersted(c) Alessandro Volta(b) Thomas Alva Edison(d) Benjamin Franklin |
| Answer» <p>Discovered on 21 April 1820 by Danish physicistHans Christian Orsted(1777–1851), when he noticed that the needle of a compass next to a wire carrying current turned so that the needle was perpendicular to the wire.option a</p> | |
| 3208. |
How many blood groupup are there? |
| Answer» <p>All humans and many other primates can be typed for the ABO blood group. There arefourprincipal types: A, B, AB, and O. There are two antigens and two antibodies that are mostly responsible for the ABO types. The specific combination of thesefourcomponents determines an individual's type in most cases.</p> | |
| 3209. |
Study of blood groups in human beings |
| Answer» <p>Theblood groupsare ABO and AB. ABOblood groupsystem is important because of the fact that A and B are strongly antigenic and anti A and anti B are naturally occurring antibodies present in the serum of persons lacking the corresponding antigen.</p> | |
| 3210. |
How many blood groups are there? What is their importance? |
| Answer» <p>Within the ABO group, four major categories are divided intoeightcommon blood types: A, B, O, and AB. Over 9.5 million people in the United States (U.S.) are blood donors, and around 5 million patients receive blood each year, according to the Centers for Disease Control and Prevention (CDC).</p> <p> glands make saliva that makes your food moist </p> | |
| 3211. |
o50. Pickles contain more salt,to(A) Improve its colourxIncrease its shelf li(B) Make it tasty(D) Change its texture and taste(C)feX |
| Answer» <p>increase its shelf life</p> <p>make it tasty as option ABC can't be the the answer</p> | |
| 3212. |
what is meant by adolescence |
| Answer» <p>Adolescencerefers to the period of human growth that occurs between childhood and adulthood. Adolescence begins at around age 10 and ends around age 21. Adolescence can be broken into three stages: early adolescence, middle adolescence, and late adolescence. Each stage has its own characteristics.</p> | |
| 3213. |
llalldcUhtainsthegehĂŠticmeterialsforinheritance.4. Describe the ultra structure and functions of mitochondria. |
| Answer» <p>Structure of Mitochondria</p><p>Mitochondria are rod shaped structure found in both animal and plant cells. It is a double membrane bound organelle. It has the outer membrane and the inner membrane. The membranes are made up of phospholipids and proteins.</p><p>The components of mitochondria are as follows:</p><p>Outer membrane</p><p>It is smooth and is composed of equal amounts of phospholipids and proteins.</p><p>It has a large number of special proteins known as the porins.</p><p>The porins are integralmembrane proteins and they allow the movement of molecules that are of 5000 daltons or less in weight to pass through it.</p><p>The outer membrane is freely permeable to nutrient molecules,ions, energy molecules likethe ATP and ADP molecules.</p><p>Inner membrane</p><p>The inner membrane of mitochondria is more complex in structure.</p><p>It is folded into a number of folds many times and is known as the cristae.</p><p>This folding help to increase the surface ares inside the organelle.</p><p>The cristae and the proteins of the inner membrane aids in the production of ATP molecules.</p><p>Various chemical reactions takes place in the inner membrane of the mitochondria.</p><p>Unlike the outermembrane, the inner membrane is strictly permeable, it is permeable only to oxygen, ATP and it also helps in regulating transfer of metabolites across the membrane.</p><p>Intermembrane space</p><p>Itis the space between the outer and inner membrane of the mitochondria, it has the same composition as that of the cell's cytoplasm.</p><p>There is a difference in the protein content in the intermembrane space.</p><p>Matrix</p><p>The matrix of the mitochondria is a complex mixture of proteins and enzymes. These enzymes are important for the synthesis of ATP molecules, mitochondrial ribosomes, tRNAs and mitochondrial DNA.Function of Mitochondria</p><p>Functions of mitochondria depends on the cell type in which they are present.</p><p>The most important function of the mitochondria is to produce energy. The simpler molecules of nutrition are sent to the mitochondria to be processed and to produce charged molecules. These charged molecules combine with oxygen and produce ATP molecules. This process is known as oxidative phosphorylation.</p><p>Mitochondria helpthe cells to maintain proper concentration of calcium ions within the compartments of the cell.</p><p>The mitochondria also helpin building certain parts of blood and hormones like testosterone and estrogen.</p><p>The liver cells mitochondria have enzymes that detoxify ammonia.</p><p>The mitochondria also play important role in the process of apoptosis or programmed cell death. Abnormal death of cells due to the dysfunction of mitochondria can affect the function of organ</p> | |
| 3214. |
Filtration |
| Answer» <p>the action or process of filtering something.</p><p>"small particles are difficult to remove without filtration"</p> | |
| 3215. |
25, Express the temperature of 0 K on the(i) Celsius scale, andFahrenheit scale. |
| Answer» <p>0 K− 273.15 = -273.1 °C</p><p>(0 K− 273.15) × 9/5 + 32 = -459.7 °F</p> | |
| 3216. |
7,6,4,3,5 का मादय होगा65(06(0) 3(d)4 |
| Answer» <p>Answer is B because b that is 5 lirs in the center</p> | |
| 3217. |
1 ampere |
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| 3218. |
constant of the spring is 0. KB, Le0.02 m7) A spring of force constant4 kgłcm is compressed 4 cm from its natural lengthwith the help of block of weight 0.5 kg. Calculate what speed the spring willpush back. (Neglecting friction of the surface). [Answer: 0.112 m/s) |
| Answer» <p>ke=1/2kx^2 equations kinetic energies1/2mv^2=1/2kx^2V=x√k/mv=0.04√0.04/05v=0.112m/s</p> | |
| 3219. |
Q. 1.Why should a magnesium ribbon be cleaned before burning in air?ir n white laver o |
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| 3220. |
Define 1 dioptre power of a lens |
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| 3221. |
Detine arrtheno |
| Answer» <p>In botany and horticulture, parthenocarpy (literally meaning virgin fruit) is the natural or artificially induced production of fruit without fertilization of ovules. The fruit is therefore seedless.</p> | |
| 3222. |
1. Define 1 dioptre of power of a lens |
| Answer» <p>power of our own eyes is 4 dioptre</p> | |
| 3223. |
separation of solid liquid mixture |
| Answer» <p>by filteration separation of solid liquid</p> <p>by filteration separation of solid liquid</p> <p>Filtration is a method for separating an insolublesolidfrom aliquid. When amixtureof sand and water is filtered: the sand stays behind in the filter paper (it becomes the residue ).</p><p>Please Like My Answer.</p> <p>by filtration separation of solid liquid</p> <p>by filtration separation</p> <p>By the process of sedimentation ,decantation and filtration are seprated</p> <p>by filterration separation of solid liquid </p> <p>By the process of sedimentation decantation and filtration are seprated</p> <p>filteration, sedimentation, centrifugation,</p> | |
| 3224. |
hydraulic circuit table |
| Answer» <p>thank you</p> | |
| 3225. |
If the wavelength of the first line of theBalmer series of hydrogen is 6561 Á, thewavelength of the second line of the seriesshould be0.63 |
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| 3226. |
what is sound who it is produce |
| Answer» <p>In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.</p> <p>It turns out that air is able to support not just one wave, but many different waves simultaneously. This means various pure tones can be mixed, and sent through the air at the same time. This is where music, speech, and other “noise” come from.When we draw a sound wave, the wave peaks and valleys are close together or far apart. Sound waves vibrate at different rates or “frequencies” as they move through the air. Frequency is measured in cycles per second, or Hertz, after the German physicist who experimented with sound in the 19th century. The faster an object vibrates, i.e. the higher the frequency, then the higher the pitch of the sound. For example, a tuning fork for A above middle C will vibrate 440 times per second and has a frequency of 440 Hertz.</p> | |
| 3227. |
A uniform string is vibrating with a fundamentalfrequency'f. The new frequency, if radius &lengthboth are doubled would be(a) 2f(b) 3fㄥ(c) |
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| 3228. |
If the length of rod A is 3.254.19+ 0.01 cm then the rod B is longer than rod A by(a) 0.94 0.00 cmQ.5aacka(b) 0.94 +0.01 cmd) 0.94 0.005 cm |
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| 3229. |
hadeu TeionOne circle has a radius of 98 cm and a second concentric circle has a radius of 1 m 26em. How much longer is the circumference of the second circle than that of the first ?5 cm |
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| 3230. |
Time: 45 MinutesA. Tick ( the correct answers.1. We smell things using our(a) eyes(b) nose |
| Answer» <p>1. (b) nose is correct answer, we use nose to sense smell</p> | |
| 3231. |
7 \operatorname { log } \frac { 10 } { 9 } - 2 \operatorname { log } \frac { 25 } { 24 } + 3 \operatorname { log } \frac { 81 } { 80 } = \operatorname { log } 2 |
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| 3232. |
B-1. Rank the following free radicals in increasing order of their stabilily and give appropriate reasonesiv) |
| Answer» <p>free radicals are stabilized by resonance..</p><p>Also stability is 3° > 2°>1° </p><p>so,. iv > ii> iii > i</p> | |
| 3233. |
. Why a transistor, in common emitter mode, can work as an amplifier |
| Answer» <p>TheCommon Emitter Amplifiercircuit has a resistor in itsCollectorcircuit. The current flowing through this resistor produces the voltage output of theamplifier. The Base of thetransistorused in acommon emitter amplifieris biased using two resistors as a potential divider network.</p> | |
| 3234. |
2. Solve:1 21(d) 22118 1815 15 7 7(f)+3(g) 1-311 = |
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| 3235. |
11. For what angle of incidence the lateral shift produced by parallel sided glass siab is minimum |
| Answer» <p>for i = 90° lateral shift is maximum.</p><p>Lateral shift for a slab of t thickness = t x sin(i - r)/cosr</p><p>when i = 90</p><p>LS = t x sin(90 - r) / cos r = t x cos / cos r = t</p><p>L.S becomes equal to thickness t.hence for I=0° it is minimum</p> | |
| 3236. |
Whenever a stream of electrons collides with astream of photons, in this collision, which of thefollowing is not conserved?(a) Linear momentum(b) Total energy(c) No. of photons(d) No. of electrons |
| Answer» <p>When a photon collides with an electron then the effect of it is called Compton scattering where the photons interact with the electron, losing momentum and therefore increase in wavelength.</p><p>option a</p> | |
| 3237. |
swer type questions )Give two uses oeach of concave and a convex mirror. |
| Answer» <p>Uses of concave mirror. </p><p>The concave mirror is a converging mirror , so that it is used for many purposes ,</p><p> It is used as a torch to reflect the light ,</p><p>It is used in the aircraft landing at the airports to guide the aeroplanes , </p><p>It is used in shaving to get an enlarged and erect image of the face .</p><p>Uses of convex mirror</p><p>1. Convex mirrors used inside building : Large offices, stores, and hospitals use convex mirror to let people see around the corner so that they can avoid running into each other and prevent any collision.</p><p>2. Used in sunglasses : One of the most common uses of convex mirror is for making sunglasses. The convex mirror reflects the sunlight away from the person’s eye wearing the sunglass.</p><p>3. Convex mirror used in vehicles: Convex mirrors are widely used as rear view mirrors in automobiles and vehicles because it can diverge light beams and make virtual images.</p> | |
| 3238. |
1. State and explain the laws of reflection. |
| Answer» <p>The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence . ... This type of reflection is called diffuse reflection, and is what enables us to see non-shiny objects.</p> <p>thank you</p> | |
| 3239. |
4) Give two uses of eacha) Concave mirrorb) Convex mirror |
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| 3240. |
1. What happens when a ray of light falls normally (or perpendiculacly) on the surface of a plane mirror2. A ray of light is incident on a plan |
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| 3241. |
23Let v and I be the readings of the voltmeter and the ammeter respectively as shown in the figure LetOlymplad (Stage-1) 20117Ry and RA be their corresponding resistance Therefore,RARv(B) RVV(R-R.)IRA(A)R:Rv |
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| 3242. |
16. The splitting of white light into its component coloursis called02. Scattering of light(2) Total internal reflection(3) Dispersion of light(4) Atmospheric refraction |
| Answer» <p> (b) Dispersion of light</p> <p>(b) dispersion of light</p> | |
| 3243. |
A ray is reflected in turn by two plane mirrors,inclined at right angle with each other. Find theangle between incident and reflected ray. |
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| 3244. |
1. If the reflected ray makes an angle of 60°with the nomal, what angle must the incidentray make with the normal? |
| Answer» <p>it will be also 60 degree</p> <p>60 ° angle will made </p> <p>it will be 60 degree acc. to the law of reflectionincident ray is equal to reflected ray therefore incident ray is 60degree</p> | |
| 3245. |
(a) S19.(a) 115°(b) 95。(c) 125( 100 |
| Answer» <p>Sorry for the inconvenience but we are currently providing solutions for questions posted in English only.</p> | |
| 3246. |
If the angle between the mirror andreflected ray is 230, what is the angleof incidence of the incident ray? |
| Answer» <p>angle of incidence will be 23°</p> <p>angle of incidence will be 23°</p> <p>Angle of incidence is 23 degree because angle of incidence =angle of reflection</p> <p>Angle of reflection also same 23° because according to snell law angle of incident is equal to angle of reflection.</p> <p>it is 23 degree only because angle of incidence=angle of reflection</p> <p>According to our “Laws of reflection”,angle of incidence =angle of reflection.according to the question, the angle of incidence of incident ray is 23 degrees.</p> <p>also it is also 23degree</p> <p>The answer is always 23 </p> <p>The angle of incident ray and reflected ray is equal, so, the answer is 23°</p> <p>angle of incidence is 23 degrees</p> | |
| 3247. |
27. A ray of light falls on the surface of a spherical glasspaper weight making an angle α with the normaland is refracted in the medium at an angle β. Theangle of deviation of the emergent ray from thedirection of the incident ray(b)2(α-β)(c)(α-β)/2 |
| Answer» <p>how</p> | |
| 3248. |
. A particular brand of talcum powder is available in two packs, a plastic can with a squarebase of side 5 cm and of height 14 cm, or one with a circular base of radius 3.5 cm and ofheight 12 cm. Which of them has greater capacity and by how much? |
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| 3249. |
ra. What causes combustion? |
| Answer» <p>Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat.</p><p>Spontaneous combustion is caused by the heating of the material to its autoignition temperature.</p><p>Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel.</p> | |
| 3250. |
\frac{\log \sqrt{27}+\log 8-\log \sqrt{1000}}{\log 1.2} |
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