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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.
| 7751. |
What is crystallisation |
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Answer» Crystallisation is a process that separates a pure solid in the form of its crystals from a solution. The crystallisation method is used to purify solids.For example, the salt we get from sea water can have many impurities in it. To remove these impurities, the process of crystallisation is used. It is the process in which pure solid can be seperated into solution from its crystals. |
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| 7752. |
give reason why cricket player lower his hand while catching the ball ? |
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Answer» Because it increases the time and decreases the chances of injuries by lowering the force of the ball. While catching a ball, a\xa0cricket player lowers his hands, because by doing so, he increases the time of catch. That is, the person increases the time to bring about a given change in momentum, and hence rate of change of momentum decreases.Thus, a small force is exerted by ball on the hands.\xa0 |
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| 7753. |
What is the relationship between force applied on a body and the resulting acceleration caused in it |
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Answer» Force =mass×accelerationF=m×a Force = acceleration × massf = m a |
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| 7754. |
A constant force of 15n acts on a body of mass 5kg find the acceleration |
| Answer» F=ma 15= 5×aA=15÷5A=3 | |
| 7755. |
Proof f=ma |
| Answer» Force=mass×velocity | |
| 7756. |
What is syllabus of the dav centerary public school in jind for science half yearly paper |
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| 7757. |
Who is go first to the space |
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Answer» Yuri Alekseyevich Gagarin went to space first and Neil Armstrong was the first man to land on the moon . Yuri gagrin Neil Armstrong. Yuri Alekseyevich Gagarin Nil armstrong What is matter Yuri Gagarin |
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| 7758. |
Who saw the free living cell for the first time? |
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Answer» Leeuwenhoek Robert brown |
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| 7759. |
Define Mariculture and aquaculture |
| Answer» Mariculture is fishing in the sea and getting fish . Aquaculture is growing fish in private ponds with fresh water in land. Both are a type of fishiculture . I hope you understood .??☺️ | |
| 7760. |
What is motion when it travel a distance of 3500 km |
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| 7761. |
Why is AIDS considered to be a syndrome and not a disease |
| Answer» AIDS causing virus HIV that comes into the body via the sexual organs or blood transfusion will spread all over the body through lymph nodes. The virus damages the immune system of the body and due to this the body can no longer fight off many minor infections. Instead, every small disease like cold can become severe pneumonia or minor gut infection can become severe diarrhoea with blood loss. The effect of disease becomes very severe and complex, at times killing the person suffering from AIDS. Hence, there is no specific disease symptom for AIDS but it results in a complex disease. Therefore, it is known as a syndrome. | |
| 7762. |
Solid is more denser than water but why ice float on water |
| Answer» Ice floats in water because while freezing some air particles gets trapped in it, which increases volume and decreases density. | |
| 7763. |
What is the currency of DNA |
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| 7764. |
How to know colourless water is pour |
| Answer» first you bring some colourless liquid place a thermometer in it and start boil note that 100 Celsius if the liquid boil | |
| 7765. |
Write differences between healthy and disease free |
| Answer» (i) Healthy is a state of physical,social and mental well being while disease free is a state of absence of body comfort.(ii) A healthy person can be disease free but a disease free person cannot be a healthy person. | |
| 7766. |
Full form of fmcg |
| Answer» F=forceM=massC=centimetreG=gram | |
| 7767. |
What is the nature of displacement time graph |
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| 7768. |
What is circular path ?What are its example? |
| Answer» Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation. Example - An artificial satellite orbiting the Earth at constant height, a stone which is tied to a rope and is being swung in circles, a car turning through a curve in a race track, an electron moving perpendicular to a uniform magnetic field, and a gear turning inside a mechanism. | |
| 7769. |
What cause gas pressure |
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| 7770. |
Distance travelled =3multiple 1000 |
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| 7771. |
What is covalent radii?? |
| Answer» \tThe covalent radius of an atom is stated as the radius of an atom which is under the covalent bond with another atom(s) of a similar element.\tThe covalent radius of an atom can be determined by measuring bond lengths between pairs of covalently-bonded atoms: if the two atoms are of the same kind, then the covalent radius is simply one half of the bond length.\tWhilst this is straightforward for some molecules such as Cl2 and O2, in other cases, one has to infer the covalent radius by measuring bond distances to atoms whose radii are already known (e.g., a C–X bond, in which the radius of C is known). | |
| 7772. |
A true solutions of common salt is prepared by dissolving |
| Answer» A true solution of common salt is prepared by dissolving sugar and alum separately in water.Hope it helps you??? | |
| 7773. |
Prove f=ma? |
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Answer» Force directly proportional to the rate of change of momentum. F=mv-mu/tF=m(v-u)/t(V-u)/t=aF=ma?? f=m×(v-u/t)(v-u/t)=a (acceleration)so,f=m×af=ma,proved By Newton second law of motion - F=change of momentum /time taken So momentum is m*v Thus, f is proportional to m* v-u/t (v-u/t) is acceleration So f is proportional to m*a , F = kma (K is the value of proportion) =1Hence, f = m*a |
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| 7774. |
What is cold blooded and warm blooded |
| Answer» Cold blooded are those which cant maintain there own body temperature i.e. homeostatis is absentFor eaxmples- Amphibians , piscesWhereas warm blooded organisms can maintaij there internal body temprature,their body temperature doesnt change with the surrounding environment.For example- Aves n mammals | |
| 7775. |
Write a short note on vermicompost |
| Answer» The compost which is prepared by Earthworms which basically hasten the process of decomposition of plants and animals refuse is called Vermi Compost. This compost is rich in nutrients necessary for the soil & didn\'t have much ill effects on soil. | |
| 7776. |
Matter is what |
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Answer» MATTER : It is anything that has mass and occupies space.( In exam it can be of 2 marks question) Anything which has mass ,occupies space and having a density called matter Cbse notes science Anything that occupies space and has mass is called matter Anything that has some mass and space is called matter |
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| 7777. |
D/w echo and reverbration |
| Answer» 1. Echo is a single reflection of a sound wave off a surface. Reverberation is the sound or the pattern created by the superposition of such echoes.2. An echo can be heard only when the distance between the source of sound and the reflecting body is at least 17 m. A reverberation can occur when sound wave is reflected by a nearby wall also.3. An echo is usually clear and can be clearly distinguished. A reverb is not a clear replica of the original sound sample.4. Echo can be used to determine the distance of a reflecting object such as a large building or a mountain, if the ambient temperature is known. Reverberation cannot be utilized for distance measurement applications.5. An echo can be heard both in open and closed spaces. Reverberation is usually experienced in closed spaces with multiple reflecting objects. | |
| 7778. |
What is the differences between homogeneous n heterogeneous in chemistry |
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Answer» A type of mixture whose composition is throughout same by its mass is called Homogeneous Mixture While A mixture whose composition is not throughout same by its mass is called Heterogeneous Mixture Homogeneous:-1) It has uniform composition throughout its mass. 2) The constituents cannot be easily separated. 3) They cannot have physically distinct parts.4) Example of Homogeneous mixture; Sugar solution,Soda water,Soft drinks,air,etc.Heterogeneous:-1) It does not have uniform composition throughout its mass. 2) The constituents can be easily separated.3) They have physically distinct parts. 4) Example of Heterogeneous mixture; Sugar and sand mixture,Milk,Ink,etc. Homogeneous mixture has uniform composition.It has only one phase.It cannot be separated out physically.Homo means \'same\'.Heterogeneous mixture has non uniform composition.There are two or more phases.It can be seperated out physically.Hetero means \'different \' |
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| 7779. |
What do you mean by chordata |
| Answer» Definition of chordate: any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill slits and including the vertebrates, lancelets, and tunicates. | |
| 7780. |
Is jaundice a acute or a chronic disease? |
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Answer» Chronic Jaundice is not a disease, but rather a sign that can occur in many different diseases that affect the liver like hepatitis and liver cancer. The liver usually processes a yellow coloured chemical (bilirubin) as a waste product, but when the liver is damaged, it is unable to do its normal job. The bilirubin then accumulates in the blood and starts to leak out into nearby tissue. Chronic |
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| 7781. |
molecular mass and mole concept |
| Answer» The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance.\xa0It is expressed in atomic mass unit (u).Mole Concept:We know that a dozen is a collect ion of 12 substances, a century is a collection of 100 substances and a gross is a collection of 144 substances. We use the terms dozen, century, gross etc. to express a certain quantity of a substance. Similarly, a mole is a word used to describe a collection of particles i.e. atoms, molecules or ions.1 mole of a substance is equal to its atomic mass or molecular mass expressed in grams. The atomic mass expressed in grams is the gram atomic mass. The molecular mass expressed in grams is the gram molecular mass.For example, The atomic mass of sodium is 23 grams.Therefore, 23 grams of sodium is equal to one mole of sodium atoms.Similarly, the molecular mass of oxygen (O2) = 2 × Atomic mass of oxygen= 2 × 16 = 32 gAvogadro experimentally found that one mole of any substance always contained 6.022 × 1023 particles.This number is called the Avogadro’s number, denoted by N0. | |
| 7782. |
What is tynadall effect |
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Answer» The scattering of light by heterogeneous mixture which can be seen by naked eye Scattering of light by colloidal particles The scattering of light by colliodal particals |
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| 7783. |
Does this app have questions for lab manual? |
| Answer» No | |
| 7784. |
Cotton is solid but it floats on water. Why? |
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Answer» Because it has lesser density than Water Because it has a space between them and it contains very small particles, so that it float on water easily Because of the small pores present on the surface of cotton. The air get filled in this pores making it light weighted. Because ot has small pores on it for the passage of air. |
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| 7785. |
Why do we see water droplets collected on the outer surface of a glass container containing ice? |
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Answer» As we know that water vapours are present in our surroundings. When these water vapour come in the contact of glass. They start to condense because of the coldness of ice. This is the reason why we see water droplets on the outer surface of a glass container containing ice. Because when the warm air come in contact with the outer surface of glass they get cool as their temperature is used by the ice present inside the glass to overcome the force of attraction between their particles. So the warm air converted into the liquid state. Just because of the process of CONDENSATION. |
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| 7786. |
can a body have constant speed but variable velocity |
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Answer» yes a body have a constant speed with variable velocity speed=distance/timevelocity=displacement/timeso displacement can be changed I think yes because speed is a scaler quantity so it doesn\'t varies by change in direction where as velocity is vector in quantity it can varies by change in direction in a body moving with constant speed. |
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| 7787. |
Explain why some of the leaves may get detached from a tree if we vigorously shake it\'s branch |
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Answer» Until and unless we shake branches, the leaves are in state of rest. But when we shake the branch, an unbalanced external force is being applied on the branch. And according to law of inertia, the object remains in its state until and unless an unbalanced external force is applied on it. So, the leaves, not remaining in rest, changes its state to motion and gets detached from the tree. Due to inertia |
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| 7788. |
Chemical name of acetone |
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Answer» C3H6O Acetone consists of three carbon atoms, six hydrogen atoms, and one oxygen atom. It is considered as a ketone since there is a carbonyl group present in it. Thus, the chemical formula for acetone or propanone is written as-\tAcetone Chemical Formula = C3H6O\t |
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| 7789. |
156 c = ---- k |
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Answer» 429k 429.16 k or kelvin is my answer 429.16 k 429.16 Kelvin 429 k |
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| 7790. |
Give three causes of global warming. |
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Answer» 1 Increase in temperature 2 quickly melting of glaciers 3 increase in sea level Led to melting of glaciers. Disturbed precipitation pattern. Rise in sea level |
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| 7791. |
What is the SI unit of mass and weight? and what is the difference between it ?? |
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Answer» Si unit of mass is Weight: It means that the force applied on earth.Mass: It means that the contained matter inside you.Hope it will help you?? Mass kgWeight N SI unit of mass is kg and weight is Newton |
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| 7792. |
Dufferent are animal cell and plant cell |
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Answer» What is motion Thanks \tCharacteristicPlant CellAnimal CellCell shapeHas distinct edges, usually square or rectangular in shape.Is irregular and round in shape.Cell wallPresentAbsentPlasma membranePresentPresentEndoplasmic reticulumPresentPresentNucleusPresent and lies on one side of the cellPresent and lies in the centre of the cellLysosomesPresent but are very rarePresentCentrosomesAbsentPresentGolgi apparatusPresentPresentCytoplasmPresentPresentRibosomePresentPresentPlastidsPresentAbsentRibosomesPresentPresentVacuolesFew large or a single, centrally positioned vacuoleUsually small and numerousCiliaAbsentMost of the animal cells consist of ciliaMitochondriaPresent, but fewer in numberAre present and are numerousEssential nutrientsThe plant cell can synthesize amino acids, vitamins and coenzymesThe animal cell cannot synthesize amino acids, vitamins, and coenzymes\t |
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| 7793. |
Painting of plant cell |
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| 7794. |
If ball is thrown up in the sky,what will happen to its value of g |
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Answer» A=-g is the value Its value will be taken negative as earth\'s gravitational pull is downward |
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| 7795. |
Prove law of conservation of momentum |
| Answer» According to law of conservation of momentum\tWhen two or more bodies acts upon each other their total momentum remains constant provided no external forces are acting\tSo, Momentum is never created or destroyed.\tWhen this law is applied for a collision between two bodies, the total momentum of the colliding bodies before collision is equal to the total momentum after collision. | |
| 7796. |
Who gave the 5 kingdom system of classification |
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Answer» R. H Whittaker R. H Whittaker |
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| 7797. |
Difine energy write it types |
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Answer» Energy is the ability to do work .it is a scalar quantity. It have only magnitude no direction .si unit of energy if Joule Types KineticPotential Electrical Heat And many more Energy is the ability to do work There are two types of energy:\tKinetic energy (working): The energy in motion is known as Kinetic Energy. For example a moving ball, flowing water, etc.\tPotential energy (static): This is the energy stored in an object and is measured by the amount of work done. For example, a pen on a table, water in a lake, etc. |
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| 7798. |
What is text alignment ? |
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| 7799. |
Where do we get our mitochondrial DNA from? |
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Answer» It is right . Do you have any proof that this answer is wrong ? I have my own proof that I learned it from byju\'s. This answer is wrong We get our mitochondrial DNA from our mothers. |
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| 7800. |
What is endoplasmic reticulmn |
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Answer» It is a network of membranes . It is of two types _ smooth ERRough ER Endoplasmic reticulumThe large network of membranous sheets and tubes is called endoplasmic reticulum.They are filled with fluids and carries materials throughout the cell due to which it is also called transport system of the cell.It transports materials between the regions of cytoplasm or between the cytoplasm and nucleus.It also provides a surface for some biochemical activities of cell.It can be classified into two types:\tRER (Rough Endoplasmic Reticulum)\tSER (Smooth Endoplasmic Reticulum) |
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