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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 6451. |
What\'s evaporation |
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Answer» The change of liquid to vapour state at any temperature below its boiling point is called evaporation. It is a surface phenomenon . (more than the surface area morw the rate of evaporation |
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| 6452. |
Classify the following as physical change or chemical change |
| Answer» We can classify on the basis on their properties. - physical change = reversible change or no new substance formed. - chemical change = irrversible change or new substance formed. | |
| 6453. |
What is the maiter |
| Answer» Everything in this universe is made up of material which scientists have named as "matter". There are three states of matter - solid, liquid and gaseous. The states of matter are inter-convertible and can be converted by changing the temperature or pressure. | |
| 6454. |
Bone cell |
| Answer» Oestocyte | |
| 6455. |
How leguminous crop improved fertility of soil |
| Answer» The leguminous plant expands the soil ripeness due to the Rhizobium bacteria in the root knobs of the plants. | |
| 6456. |
Difference between monocot and dicot plant??????????????????????????? |
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Answer» Monocot: It has only one cotyledon. It is trimerous. It has fibrous root. It has parallel veins on the leaves.Dicot: It has two cotyledons. It is pentamerous. It has tap root. It has reticulated veins on the leaves. Monocots -1posses one cotylendon 2 fibours roots and parallel venation 3 trimerous flower Dicots-1 posses two cotylendons2 tap roots3 reticular venation 4 pentamerous flower It\'s very important for me? |
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| 6457. |
what is definition of commercial unit of electrical energy |
| Answer» Kilowatt - hour is the commercial unit of electrical energy. We have seen that power is the rate of energy consumed or delivered. ... It is (1000 watt) x (3600 seconds) i.e., 3600000 joules = 3.6x106 J. 3.6 x 106 J is defined as 1 kWh. The electric energy used in houses, factories etc. is measured in kilowatt hour. | |
| 6458. |
What is antibiotic ?who discover antibiotic name of first antibiotic and source of antibiotic |
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Answer» Pencilinium was the first antibiotic Alexander Flaming discovered first antibiotioc .? Antibiotics is a medicine which kill s or stop the growth of disease causing micro organisation |
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| 6459. |
What are the difference between the mass of an object and its weight |
| Answer» Difference between mass and weight-:• Mass is the total matter contained in a body while weight is the force with which an object is attracted towards the earth.•SI unit of mass and weight are different.SI unit of mass - Kg (Kilogrammes)SI unit of weight - N (Newton)\xa0• Mass is constant, it won\'t change due to position. While weight isn\'t constant, it will change due to position. Suppose, the object istaken at the center of the earth where gravity is 0, we know that,\xa0W=mgW= m×0W=0Weight will change due to change in position.• Mass can never be zero, while weight can be.• Mass is a scalar quantity , having only a magnitude and no role of direction.• Weight is a vector quantity having a magnitude as well as a direction on its own.• Mass is most probably measured by use of a beam balance while weight is measured by use of a spring balance usually. | |
| 6460. |
What is the melting point of ice? |
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Answer» 0°C Zero (0)°c |
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| 6461. |
Covert 3kg watt into joule |
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Answer» 3000 joule 3000j 1kw -3.6*10 to tge power 6 Therefore 3*3.6*10 to the power 6 Which us equal to 10 .8*10 to the power 6 |
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| 6462. |
Enlist three advantages of classification (class9) |
| Answer» Make easy in reading. Easy in search. Easy in use. | |
| 6463. |
A teacher |
| Answer» | |
| 6464. |
What is diffusion explain with example... |
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Answer» The intermixing of particles of substance is called diffusion. Diffusion is the mixing of substance from hogher concentration to lower concentration |
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| 6465. |
What is the function of centrasome in cell? |
| Answer» Centrosome – It helps in cell division in the animal cell. | |
| 6466. |
List any three properties of basic which a colloidal solution can be recognised |
| Answer» Size of particle of colloids is between 10 to the power minus 5 to 10 to the power minus 7. It not passes beam of light through it. It\'s particle is stable | |
| 6467. |
Evaporation is a surface phenomena but boling is a bulk phenomena why |
| Answer» During evaporation,water of surface area go to atmosphere while during boiling,all water heated and go to atmosphere. | |
| 6468. |
What is evaporation write the different evaporation boling and vaporation |
| Answer» The changing of liquid into gases below its melting point is called evaporation. The changing of liquid into gas at its boiling point is called boiling. | |
| 6469. |
At 100 c out of water and water vapour which will have more energy and why |
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Answer» water vapour Water vapour have more energy because it have extra heat in the form of latent heat absorbed during state change |
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| 6470. |
What do you mean by later heat of fusion and later heat of vaporation |
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Answer» heat energy which is supply to 1 kg of ice to change in liquid at atmospheric pressure is called latent heat of fusion. the heat energy which is supplied to 1 kg of liquid in change gases at atmospheric pressure is called latent heat of vaporization Sorry I type wrong below.,???? 8 to 1 kg of ice in change or to liquid at Latent heat of fusion: solid to liquid change.Example: melting of ice to form water.Latent heat of vaporisation: liquid to gas change. Example: boiling of water to form steam. Latent heat of fusion=Latent heat of fusion is the heat that use to chan 1kg solid into its liquid state . Latent heat of vaporation= latent heat of vaporation is the heat that use to change 1kg liquid into its gaseous state . |
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| 6471. |
What are the dry Ice why the dry Ice storage at high pressure |
| Answer» It is sublimated substance. It can change into gas so it stores at high pressure. | |
| 6472. |
Why circular motion is uniforn |
| Answer» Objects in uniform circular motion have a constant speed but a changing velocity because velocity has a direction and the direction of an object in circular motion is always changing. | |
| 6473. |
What are the characteristics of kingdom monera, protista and fungi |
| Answer» Kingdom monera1. These are unicellular and prokaryotic organisms.2. Some of have cell wall while some do not have.3. These can be autotrophic or hetrotrophic.4. Example mycoplasma, cyanobacteria | |
| 6474. |
What are two breed cow in india |
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Answer» tharparkar and Gir Red sindhi , sahiwal Gir and Red Sindhi. |
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| 6475. |
On what factors does potential energy of an object depends |
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Answer» 1.mass of an object2.gravity acting on same object3.height on which the object is placed Shape , position |
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| 6476. |
What is the observation when dilute h2so4 is added to a mixture of iron and sulphur ? |
| Answer» H2 gas is liberated because sulphuric acid is reacting with a metal. | |
| 6477. |
Ques1 What is difference between Notochord and Nervechord ? |
| Answer» \tNotochord is a long flexible rod-shaped support structure that runs along the back of the animal separating the nervous tissue from the gut.\xa0\tNerve cord is a dorsal tubular cord of nervous tissue above the notochord of a chordate. | |
| 6478. |
What is mean by triploblastic |
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Answer» Organisms having 3germ layer i.e ectoderm,endoderm and mesoderm Having three germinal layer a actoderm, mesoderm and endoderm. 3 germ layer Triploblastic are the animals with 3 chamberd heart |
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| 6479. |
Which group of animal have haemocoel |
| Answer» Molluces and arthropods | |
| 6480. |
What is b.o.d. |
| Answer» Biological oxygen demand is the amount of dissolved oxygen needed by organism to break down organic material present in the given water at certain temprature iver a specific time period. | |
| 6481. |
What is tha SONAR |
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Answer» SONAR- The acronym SONAR stands for Sound Navigation and Ranging.Sonar is a device that uses ultrasonic waves to measure the distance, direction and speed of underwater objects.Principle: It uses the phenomenon of echoes in determining the sea-depth and locating the presence of under-water objects.Working:\xa0i) A strong beam of ultrasonic waves is sent from a transmitter mounted on the ship.ii) The beam is reflected from the seabed and is received by an under-water detector which is also mounted on the ship.iii) The time interval between transmission and reception of the ultrasonic signal is noted SONAR stand for sound navigation and herings |
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| 6482. |
Theory of glass slab |
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Answer» \tRefraction through rectangular glass slab with parallel faces:\tThe refraction takes place at both air-glass interface and glass-air interface has the following characteristics:\t\xa0\tWhen a light ray travels from air to glass, the angle of incidence is greater than angle of refraction as ray bends towards normal.When a light ray travels from glass to air, the angle of refraction (also called angle of emergent in case of glass) is greater than the angle of incidence of glass-air interface as ray of light bends away from the normal.If the angle of incidence is zero, i.e. the incident ray is normal to the interface, the ray of light continues to travel in the same direction after refraction.The angle of emergence and angle of incidence will be equal. Emergent ray is parallel to the incident ray along with original direction but it will be laterally displaced to the left of the incident ray.For the same angle of incidence, lateral displacement is proportional to the thickness of the glass slab.For the same thickness of glass slab, the lateral displacement is proportional to the angle of incidence.\t\tAIMTo trace the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, angle of refraction, angle of emergence and interpret the result.MATERIALS REQUIREDDrawing board, drawing pins, three plane sheets of white paper, a rectangular glass slab, geometry instruments, and sharp pointed pins.THEORYThe refraction takes place at both air-glass interface and glass-air interface of a rectangular glass slab.\tWhen the light ray incident on air-glass interface (DC) obliquely, it bends towards the normal.\tThe refracted ray is incident obliquely on the second parallel surface inside the rectangular glass slab, i. e. glass-air interface (AB) and after refraction, it moves away from the normal.\tThese refractions at both the surfaces obey the laws of refraction (Refer to basic building concept).\tPROCEDURE\tFix a white paper on a drawing board with the help of drawing pins and divide the sheet in two parts by a vertical line.\tPlace a rectangular glass slab in the first part. Draw its boundary. Remove the glass slab and label the boundary as A1, B1, C1, D1\xa0as shown below.\t\tDraw a normal (perpendicular) MN on the side A1B1\xa0at a point O1, slightly away from the centre towards A1\tDraw an oblique line P1Q1\xa0(incident ray) such that ∠P1O1M = 30° (Angle of incidence). Fix two sharp pointed pin P1\xa0and Q1\xa0vertically erected on the line P1O1\xa0at a distance of 4 to 6 cm apart.\tPlace the glass slab again within its boundary. Look at the feet of pins (not their heads) P1\xa0and Q1from the other parallel opposite face of the slab, i.e. from C1D1\xa0along the plane of paper. Fix other two pins R1\xa0and S1\xa0in such a way that R1\xa0, S1\xa0and the image of P1\xa0and Q1\xa0lie on a same straight line.\tRemove the glass slab and all the four pins. Encircle all the prick of the four pins. Join the points R1and S1\xa0within the encircle and produce upto the edge C1D1. Let R1S1\xa0meet C1D1\xa0at O1. This will act as an emergent ray.\tDraw a normal M1N1\xa0at O2. Join O1\xa0and O2. It will represent the path of ray inside the glass slab, i.e. refracted ray.\tMeasure the angle of emergence, i.e. ∠e = ∠N1O1S1\xa0and angle of refraction, i.e. ∠r = ∠NO1O2\tRepeat the experiment by taking the different angles of incidence such as 45° and 60° on the other part of paper and measure the angle of refraction and emergence accordingly and tabulate them.OBSERVATION TABLERESULT\tAt the point of incidence the incident ray, refracted ray and the normal to the air-glass interface, all lie in the plane of paper.\tWithin experimental limits, the angle of emergence and angle of incidence are equal.\tThe emergent ray is parallel to the incident ray.\tEmergent ray is laterally displaced.\tWhen the light ray travels from optically rarer medium (air) to optically denser medium (glass), the angle of refraction is less than the angle of incidence.\tThe refracted angle at the air-glass interface and the incident angle at the glass-air interface are found to be equal.\tFrom the observation table, it is clear that with the increase in angle of incidence, angle of refraction also increases. Refraction through a rectangular glass slab:\xa0Consider a rectangular glass slab PQRS, as shown in figure below. On the face PQ, a ray AB is incident at an angle of incidence i1. It bends towards the normal, on entering the glass slab, and travels along BC inclined at an angle of refraction r1. The refracted ray BC is incident on the face SR at an angle of incidence i2. The emergent ray CD bends away from the normal at an angle of refraction r2.\xa0Now, using Snell’s law, we have\xa0Refraction from air to glass at face PQ,\xa0 ...(1)\xa0where,\xa0na\xa0is the refractive index of sir andng\xa0is the refractive index of glass.\xa0Fig.\xa0Refraction through a glass slab\xa0Using Snell’s law for refraction from glass to air at face SR, we have\xa0But Therefore, ...(2)\xa0Multiplying equations (1) and (2), we get\xa0\xa0\xa0i.e., \xa0Thus, the emergent ray CD is parallel to the incident ray AB, but it has been laterally displaced by a perpendicular distance CN with respect to the incident ray. This lateral shift in the path of light on emerging from a medium with parallel faces is called\xa0lateral displacement.It is found that the lateral displacement is directly proportional to the thickness of the glass slab.\xa0 |
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| 6483. |
Differentiate between squamous, cuboidal and elongated epithelial tissue |
| Answer» \tSquamousCuboidalColumnari. It is made up of thin, flat and irregular-shaped cells. It forms the delicate lining of cavities (mouth, oesophagus, nose, etc.) and blood vessels.ii.\xa0It protects the underlying parts of body from mechanical injury, entry of germs, chemicals and drying. i. It consists of cube-like cells. These are found in kidney tubules, thyroid vesicles and in glands.ii. It helps in absorption, secretion and excretion. It also provides mechanical support.i. It consists of cells which are taller than broader i.e. pillar-like. It forms the lining of stomach, small intestine and colon.ii.\xa0Its main function includes absorption and secretion.\t\xa0 | |
| 6484. |
What is the effect of pressure on boiling point |
| Answer» As Pressure increases,the boiling point of substances increases. | |
| 6485. |
Archimedics principle |
| Answer» When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it.If the weight of the water displaced is less than the weight of the object, the object will sink.Archimedes’ principle has many applications :-\tIt is used in designing ships and submarines.\tLactometers, which are used to determine the purity of a sample of milk\tHydrometers used for determining density | |
| 6486. |
a skier of mass 50 kg stands at a top of a ski jump .He takes off from the top of h 75m calculate PE |
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Answer» Mgh75*50*10=37500 262500j P.E if g=9.8 36750j ( mgh) |
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| 6487. |
Can u name the two organelles we have studied that contain their own genetic material |
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Answer» Mitochondria and plastids Mitochondria and chloroplast are the two organelles that contain therir own genetic material |
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| 6488. |
What is mitochondrion |
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Answer» Mitochondria is called power house ? of the cell becz the oxuy of food molecules occurs in mitochondria and energy is released in the form of ATP. It is the power house of energy cell It is an organelles having oval shaped and its outer membrane is very porous while its inner membrane is deeply foldedIt has its own DNA and protein Mitochondria is also known as the power house of the cell Mitochondria is known as the power house of the cell. |
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| 6489. |
Can be able to drink pure distrilled water |
| Answer» No | |
| 6490. |
mention 2 activitiesunder taken for improvement |
| Answer» Heigher yeild and improved quality of seeds | |
| 6491. |
Drive inverse Square law |
| Answer» | |
| 6492. |
Calculate the molecular mass of CoCo3 and H2So4 |
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Answer» CaCo3=40+12+48=100H2So4=2+32+64=98 H2So4 : 1×2+......... Answer is : chal hat pare |
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| 6493. |
What is density definition,theoritically? |
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Answer» It is defined as mass per volume It is mass/volume Chal bda aya |
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| 6494. |
Who is the first scientost |
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Answer» Acc. to our ch4 Egoldstein is the first scientist who created a model of atom Hello |
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| 6495. |
Why desert cooler cools better on a hot dry day |
| Answer» On a hot and dry day we perspire more it means that more sweat is released from our body and make us feel wet but wearing cotton clothes help us by easily evaporating all our sweat and it takes the heat energy for evaporation from our body thus making us feel cool hope you will like this one | |
| 6496. |
Name the particles which determine mass of atom |
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Answer» No.of protons + No. Of neutrons Protons and neutrons |
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| 6497. |
What is the formula to find acceleration |
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Answer» V² - u²/2s a=v-u\\t Formula to find acceleration is final velocity (v)- initial velocity (u) / time v - u / t v-u/time |
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| 6498. |
Write names of solutions used to stain plant cell and animal cell white making a slide |
| Answer» To dye a plant cell iodine or safrannineTo dye animal cell methyline blue | |
| 6499. |
state 2 differences between leucoplasts and chromo plasts |
| Answer» Chromoplast has different pigments whereas leucoplast contains nonany pigmant | |
| 6500. |
What is ligaments |
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Answer» Ligament is elastic in nature , and connects bone to bone Bundles of tissue are called ligaments. They attach the to each other at the joints . |
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