InterviewSolution
Saved Bookmarks
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.
| 4701. |
14. Why don't birds sitting on an electric wire get a shock? |
| Answer» <p>Electricityflows along the path of least resistance.Birds don'tget shocked when they sit onelectrical wiresbecause they are not good conductors ofelectricity. Their cells and tissues do not offer electrons an easier route than the copper wire they're already traveling along.</p> <p>excellent</p> | |
| 4702. |
Y SHORT ANSWER TYPE QUESTIONS (Answer in About 20-1 What do you mean by the directions of foreign trade of India?(Pb. 2001, 02, 04, 05, 07, 08, 09, 0 (S, |
| Answer» <p>Direction of foreign trade means those countries with which India has trade ties.</p><p>Direction of Indian foreign trade has undergone a considerable change after independence.</p><p>(i) In 1947, U.K. was the main partner in foreign trade with India. India’s exports and imports were 34% and 30% respectively. After independence, India got new trade with USA, Germany, Japan, the OPEC and USSR. It helped India to diversify her industries.</p><p>(ii) India has diversified her exports to match its imports on the eve of independence; UK was the main country for exports. But now USA has become the biggest buyer of Indian goods. Along with UK and USA, Germany and Japan buy Indian goods. OPEC is also main buyers of Indian goods.</p><p>(iii) India has vast requirements of industrialisation. So it purchases from U.K., USA, and USSR and from many other countries.</p> | |
| 4703. |
write short note on electricity ? |
| Answer» <p>ElectricityIt is a type of energy fueled by the transfer of electrons from positive and negative points within a conductor.Electricityis widely used for providing power to buildings,electric devices, and even some automobiles. </p> | |
| 4704. |
12. This system filters wastes from the blood |
| Answer» <p>The organ system that filters blood and removes nitrogenous wastes from the body in the form of urea or uric acid. In humans, the twokidneysare the vital organs of blood filtration.</p> <p>thanks for the answer love u im not trying to freak u out. I was just helping my little brother with this last question again thanks love u for that.</p> <p>The organsystemthatfilters bloodand removes nitrogenouswastesfrom the body in the form of urea or uric acid. In humans, the two kidneys are the vital organs ofbloodfiltration. In humans, other important structures of thesystemare the ureters, the urinary bladder, and the urethra</p> | |
| 4705. |
An α particle and a proton are released from the centre of acyclotron and made to acceleratea Can both be accelerated at the same cyclotron frequency?bWhen they are accelerated in turn, which of the two willhave higher velocity at the exit slit of the dees?What is the basic principle of working of a cyclotron? |
| Answer» <p>Cyclotron works on the principle that a charged particle moving normal to a magneticfieldexperiences magnetic lorentz force due to which the particle moves in a circular path.</p> | |
| 4706. |
vibrational spectrum |
| Answer» <p>The part of a molecular spectrum in which the bands arise from quantized changes in the energy of mutual atomic vibrations within the molecule.</p> | |
| 4707. |
The plant which has both autotrophic and heterotrophic modes of nutrition. |
| Answer» <p>insectivorous plant</p> | |
| 4708. |
Name the modes of transfer ofheat. |
| Answer» <p>There are threemodesofheat transfer: conduction, convection, and radiation. Any energy exchange between bodies occurs through one of thesemodesor a combination of them. Conduction is thetransfer of heatthrough solids or stationery fluids. Convection uses the movement of fluids totransfer heat.</p> | |
| 4709. |
write the names of some items which are available at our home,divide them in two categories lustrous and non lusturous |
| Answer» <p>It is a home based activity, discuss with your parents and find out the object in your home! </p> | |
| 4710. |
92The nucleus resulting from 238U aftersuccessive emission of two a-particles andfour B-particles is(A) 230,92(B) 2303a88(D) 230pu(C) 230th |
| Answer» <p>the correct answer is b</p> <p>Ans is option (B) 230Ra 88</p> <p>Ans is option (B) 230Ra 88</p> <p>the correct option is b</p> <p>b is the correct answer</p> <p>option b is the correct answer</p> | |
| 4711. |
C. LONG ANSWER TYPE QUESTIONSHow does the reproductive phase in women differ from thatin the hody of a female during menstrual1. Name the male and female gametes.in men ? |
| Answer» <p>Male gamates is sperms and female gamates is ovum.Reproductive phase in both females and males begin at puberty. In males, reproductive phase lasts until death but in females, it ends by the age of 50 years. Menstrual cycle/ menstruation mark the commencement of puberty in girls. In a girl, reproductive phase emerges from the age of 10 to 15 when she attains the puberty. When puberty arrives eggs in ovaries starts to mature.</p><p>One of the ovaries releases the matured ovum in every 28 to 30 days. This is called ovulation. The uterus becomes thicker and prepares itself for implantation. If the egg fuses with the sperm it becomes fertilized. The fertilized egg (egg fused with sperm) leads to pregnancy.</p><p>Contrary to this, unfertilized egg leads to shedding of uterus walls and causes bleeding in women. Menstruation is the bleeding phase. Menarche is the first menstrual flow. By the age of 50 years, menstrual cycle stops forever and is marked as menopause. The time interval from one menstrual cycle to another can vary from 28 to 30 days.</p><p></p><p>The sex hormones along with few other hormones are responsible for this phase in women. The variation in these hormones may change the ovulation day. The irregularity in menstrual cycle is also attributed to hormonal imbalances. However, what is interesting to know is how the sex of a child is determined!</p><p>Sex Determination</p><p>In the nucleus of every cell in the human body, we have chromosomes. All the human beings have 23 pairs of chromosomes in the nuclei of their normal body cells.Out of these 23 pairs of chromosomes, one pair of chromosomes is called sex chromosome. The two chromosomes that determine the sex of an offspring or baby are called sex chromosomes.The two sex chromosomes are named X chromosomes and Y chromosomes.</p><p>The gametes are special cells called reproductive cells.The gametes contain only 23 single chromosomes and hence, they have only one of the two sex chromosomes that exist in the normal body cells. In females, all the gametes or all the egg cells contain X chromosomes.</p><p>In males, half of gametes or sperms have X chromosomes and half of gametes or sperm have Y chromosomes. The baby developed from XX chromosome of sex chromosome in the zygote is a girl. And, the baby developed from XYcombination of sex chromosomes in zygote will be a boy.</p> | |
| 4712. |
Two particles A and B initially at rest, move towards each other under their mutual force of attraction. Atthe instant when the speed of A is v and the speed of Biis:-(A) 3v(B) v(C) 1.5v(D) zero |
| Answer» <p>At initial position both A and B are at rest, hence momentum is zero. It is given that no external force is acting on them .So, momentum remains zero. Since mass cannot be zero, therefore velocity is zero.option d</p> | |
| 4713. |
state characteristics of a image formed by a. concave mirror |
| Answer» <p>there are different types of images formed by a concave mirror. one real and enlargedvirtual and diminished. virtual and the same size as of the object</p> | |
| 4714. |
Give the characteristics of image formed by a plane mirror |
| Answer» | |
| 4715. |
what are the three points about virtual image |
| Answer» <p>1.virtual image cannot be caught on a screen.2.virtual image is always erect.3.a virtual image is formed when the rays of light after reflection or refraction appear to meet at a point.</p> | |
| 4716. |
define virtual image |
| Answer» <p>Virtual image :</p><p>If a beam of rays starting from a point source of light, after reflection or refraction, appear to diverge from another point, then the second point is called the virtual image of the first.</p><p>Virtual image cannot be captured on a screen.</p><p>Virtual images are usually erect.</p><p>The image of our face in mirror is a virtual image.</p> <p>thanks</p> | |
| 4717. |
write any three points about virtual image |
| Answer» <p>1. a virtual image cannot be caught on a screen.2. virtual image is formed when the rays of light after reflection or refraction appear to meet at a point.3. 2.The image is always erect.</p> | |
| 4718. |
(e) Find the power of a convex lens which forms a real and inverted innage of magnification-1 ofan object placed at a distance of 20 cm from its optical centre |
| Answer» <p>-1 = v/uv= - × - 20v= 20 cm1/f=1/v-1/uf= 10cmSo focal length= 10 cmPower = 1/ f=10diopter</p> | |
| 4719. |
Write short notes on(a) AIDS; (b) Malaria. |
| Answer» | |
| 4720. |
C. Match the following1. Sputnik2. New moon3. Moorna) phase of moonb) artificial Satellitec) maximum moond) natural Satellite4. Waning gibbous |
| Answer» <p>1. b2. a3. d4. c</p> | |
| 4721. |
animals on the eartn.Look at the pictures of some common insects which we see around us. Namethem2.34. |
| Answer» <p>Bee</p><p>Mosquito</p><p>Butterfly</p><p>Dragonfly</p> <p>thanks</p> | |
| 4722. |
3. A body is moving, as shown in the graph given below,represents the motion asTime(a) backward with uniform velocity(b) forward with uniform velocity(c) backward with non-uniform velocity(d) forward with non-uniform velocity |
| Answer» <p>As the displacement is reducing with time, it means the body is approaching it's starting point ( considering linear motion). the slope of the curve remains constant thus option (a) is most suitable answer</p> | |
| 4723. |
An object of mass m and velocity v has kinetic energy 200 J. Find the nethe mass of the object becomes double and velocity still remains the same.nnt force denends |
| Answer» | |
| 4724. |
Section B22. You are given a potato, sweet potato, pea tendril and spinach. Which two areanalogous structures and why? |
| Answer» <p>Analogous structures have similar functions but are different in their structural</p><p>details and origin. Analogous structures indicate different ancestry. From the</p><p>given plants, potato and sweet potato are analogous structures. They perform</p><p>similar function but have different origins. Potato is a modified stem meant for</p><p>the storage of food. Sweet potato is a modified root also meant for the storage</p><p>of food. Therefore, potato and sweet potato are analogous structures in plants.</p> | |
| 4725. |
above the solution)F-1.Two liquids A and B form an ideal solution. At 300 K, the vapour pressure of a solution containing 1mole of A and 3 moles of B is 550 mm of Hg. At the same temperature, if one mole of B is added to thissolution, the vapour pressure of the solution increases by 10 mm of Hg Determine the vapour pressureof A and B in their pure states |
| Answer» | |
| 4726. |
5. A stone is thrown in a verticalluupward direction with a velocityof5ms'.If the acceleration of thestone during its motion is 10msin the dowrurard direction. whtwill be the height attained by thestone and how much time will ittake to reach there? |
| Answer» | |
| 4727. |
A plant hormone isa) an ion that alters turgor pressureb) a pigment that responds to environmental changesc) an orgaic compound |
| Answer» <p>C is correct </p> <p>c . an organic compound</p> | |
| 4728. |
3. Name five plant hormones and mentionthe hormone involved in cell division. |
| Answer» <p>The plant hormones are as follows,Auxins, cytokinins, gibberellin, abscissic acid, ethylene.Cytokinins is responsible for cell division</p> | |
| 4729. |
Working of Electric Motor , A.C . motor , D.C motor. |
| Answer» <p>thanks you Maina ji</p> | |
| 4730. |
Briefly explain the working principle of a 3 - phase induction motorwith the help of suitablediagrams? |
| Answer» <p>super bro</p> | |
| 4731. |
d) A 3-phase, 4-pole, 50 Hz induction motor is running at 1455 rpm. Find the slip speed and slip? |
| Answer» <p>slip speed = 1500- 1455= 45slip= 1500-1455/1500= 45/1500</p> <p>tq </p> | |
| 4732. |
A motor normally fitted to a domestic vacuum cleaner is. moo(b) Cage Induction(d) Shunt Wound(a) Universal(c) Wound rotorFoctor at ful |
| Answer» <p>A motor normally fitted to a domestic vacuum cleaner is universal motor.</p> | |
| 4733. |
name the extensively coiled structure of alimentary canal. |
| Answer» <p>Ans :- It is small intestine which have highly coiled structure. it helps in digestion as well as absorption</p> | |
| 4734. |
two reasons to justifyla) water at room temperature is a liquid.b) an iron almirah is a solid at roorm temperature |
| Answer» | |
| 4735. |
Figure shows a long wire bent at the middie to fom a right angle. Show that the magnitudes of thethese magnitudes. The wire w and theB-5.magnetic fields at the points Q and R are unequal and find tcircumference of circle are coplaner and w2 is perpendicular to plane of paper. Also find the rato of fieldcircle are coplaner and w is perpendicularto plane of paper. Also find the ratiofieldat Q and R2 |
| Answer» | |
| 4736. |
why do we wear clothes |
| Answer» | |
| 4737. |
8. We prefer to wear light-coloured clothes in summer and dark-coloured clothesin winter |
| Answer» <p>false it should be dark colour cloths because dark colour absorbe more heat</p> <p>Light-colored clothingreflectslightand dark-colored clothingabsorbs it. The more heat that is absorbed the hotter theclothingis and the hotter you are. Furthermore,light-colored clothinglooks softer and cooler.</p> | |
| 4738. |
2. State for each of the following whether it is due to evaporation or condensation(a) Water drops appear on the outer surface of a glass containing cold water(b) Steam rising from wet clothes while they are ironed.(c) Fog appearing on a cold winter morning.(d) Blackboard dries up after wiping it.(e) Steam rising from a hot girdle when water is sprinkled on it. |
| Answer» <p>, </p> | |
| 4739. |
A) Eliminatory organB) Excretory organC) Metabolic organD) Anabolic organ175)The largest excretory organ in our body isA) KidneysB) LiverC) LungsD) Skin6) Sweat glands of skin eliminateA) UreaB) Salt and waterC) SugarD) Both (a) and (b)7)The most important human excretory organs are |
| Answer» <p>kidney is the most important human excretory organ</p> | |
| 4740. |
Is it justifed to prevent tribals from staying in the core area oforestand against the motion in your notebook.rom staying in the core area oft? Discuss the matter in your class and note down the points |
| Answer» <p>no it is not justified to prevent tribal from staying in the core area of the forest as they are not harming any thing there.</p><p>In fact they are helping to keep our environment pollution free by growing trees, plants, etc. They help grow the communities and all they do is to care and nurture the plants. But if u see in another way, most of the times they kill animals for food and rarely depend on the fruits and veggies produced by the plants</p> | |
| 4741. |
U.V lidl dll MHOI. You are given dilute sulphuric acid. What is the effect of it on the follong(b) Blue Litmus (c) Phenolphthalein |
| Answer» <p>blue litmas changed into red</p> | |
| 4742. |
4. Compound Ph-O C-Ph can be prepared by the reaction of(i)(ii)Phenol and benzoic acid in the presence of NaOHPhenol and benzoyl chloride in the presence of pyridinePhenol and benzoyl chloride in the presence of ZnCl,Phenol and benzaldehyde in the presence of palladium(iv)The reagent which does not react with both, acetone and benzaldehyde( Sodium hydrogensulphite(5.Phenyl hydrazineFehling's solutionGrignard reagent(iv6.Cannizaro's reaction is not given byCHOноHCHO(iv) CH,CHOWhich product is formed when the compoundconcentrated aqueous KOH solution?7.CHO is treated withCHO(i KOCH OHii KOC-OK+KOOKiv)С-ОК+OK |
| Answer» <p>Cannizzaro reaction is given by ones which do have an alpha hydrogen.</p><p>hence, option (c) is correct. As fomaldehyde has an alpha hydrogen, it will not undergo cannizzaro</p> | |
| 4743. |
3. A compound 'X' on heating with excess conc.sulphuric acid at 443 K gives an unsaturatedcompound 'Y'. 'X' also reacts with sodiummetal to evolve a colourless gas 'Z'. Identify'X', 'Y' and Z'. Write the equation of thechemical reaction of formation of 'Y' and alsowrite the role of sulphuric acid in thereaction. |
| Answer» <p>X→443Kconc.H2SO4Y ( unsaturated compound)Z is hydrogen (Colourless gas)</p><p>X, Y and Z are alcohol, alkene and hydrogen respectively.</p><p>Suppose X is ethanol,it gives alkene on reacting with conc. H2SO4</p><p>C2H5OH (X)→443Kconc.H2SO4 C2H4(Y)</p><p>2C2H5OH→Na2C2H5O-Na++ H2(Z)</p><p>Role of sulphuric acid: It is used as a dehydrating agent in the above reaction.</p> | |
| 4744. |
****************لن يممن النملSCIENCENote: please do Science Holiday Homework in a separate notebookWORKSHEET :1 TOPIC :-SORTING MATERIALS INTO GROUPS1) Fill in the blanks:1. Materials that have lustre are usually called as -&amp: -2. Three examples of metals are ---3. The gas which can dissolve in water is4. Materials are grouped together on the basis of ____ andin their5. Some metals lose their shine and often look dull because of the action ofproperties.on them.6. Based upon transparency, materials can be grouped asLand- and- -7. A substance which is used in making different objects is called _materials8. The materials which occur in nature are calledmaterials9.. The materials made by man are called _10. The materials which have natural shine on their surface are calledII Name the following:1. Two liquids soluble in water_2. Two liquids insoluble in water_5. Two transparent objectsTwo translucent objectsnaque objects |
| Answer» <p>1.Lusturous2.Silver, gold, and sodium3.dissolution5.reacts with moist and get oxidized </p> <p>1.lusturous2.Gold and silver and sodium3 dissolution4.reacts with moist and get oxidized</p> <p>1- lusturous 2-gold and silver and sodium3-dissolution4-reacts with moist and get oxidized</p> | |
| 4745. |
Cellulose is a carbohydrate but not useful as food for man. Give reason. |
| Answer» <p>Cellulose cannot be digested in the highly developed organisms like humans.plants have a specialized system of digesting cellulose. hence though cellulose is a carbohydrate it not useful as a food material for humans</p> | |
| 4746. |
d131. Cell wall is(a) Nonliving and impermeable(b) Nonliving, rigid and impermeable(c) Living and semispermeabledy Living and selective permeableformation of glyco |
| Answer» <p>option (b) the correct answer. </p> <p>option (b) the correct answer</p> <p>option b is the correct answer of the given question</p> <p>Option b is correct answered</p> <p>option b is the correct answer of the given question</p> <p>option b is the correct answer to this question. </p> <p>b is the answer of the following</p> <p>the correct of the question is ( D) </p> <p>B) is the right answer </p> <p>option d is the correct answer of this question</p> <p>cell wall is Living and selective permeable.option D is the correct answer. </p> <p>option b is the correct one</p> <p> option b is the correct</p> | |
| 4747. |
Q.107 Law of purity of gametes is also known as(1) law of dominance(3) law of independent assortment(2) law of segregation(4) law of incomplete dominance |
| Answer» <p>option 2 that is law of segregation is correct answer</p> | |
| 4748. |
1) What are d-block elements? |
| Answer» <p>The d-block elements are found ingroups3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 of the periodic table; d-block elements are also known as thetransition metals. The d orbital is filled with the electronic shell “n-1.”</p> | |
| 4749. |
OR(a) What will you observe when dilute lydrochloric acid is added to a smull amount of copperoxide n a beaker?Aquecus solution of HCI shows acidic character. But the aqueous solution of glucose fail to doso. Why?(b) |
| Answer» <p>When dilute hydrochloric acid is added to a small amount of copper oxide, an effervescence will be observed i.e a vigorous reaction will take place and the product of the reaction is calcium chloride and water.</p><p>This kind of a reaction is referred to as neutralization reaction.</p><p>The copper oxide is a base and HCl is an acid hence acid-base reaction thus neutralization reaction.</p> | |
| 4750. |
V Write True and False in front of the statement given belowLime water is a solution of calcium carbonate in water1.2.3. Magnesium oxide dissolved in water to form magnesium hydroxide which is acidic inWhen bread goes stale, a physical change takes placenatureDry air can cause rusting of iron.4. |
| Answer» <p>1. True</p><p>2. True</p><p>3. True</p><p>4. False</p> | |