InterviewSolution
Saved Bookmarks
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.
| 3351. |
Define valence of an atom.find out the valiancy of chlorine and magnesium. |
|
Answer» Valence of an atom is defined as the no. Of atom present in their outermost shell.Valency;Chlorine= 2, 8, 7 = 8-7 = 1 Valency of Cl is 1.Magnesium= 2,8,2 So, Valency of Mg is 2. Mm |
|
| 3352. |
What is latent hear |
|
Answer» Hidden heat or the heat which was provided to any matter which gets hidden The hiden heat is known as latent heat Hidden heat applied on an object |
|
| 3353. |
Explain the pure substance |
|
Answer» A substance that has a fixed chemical composition throughout is called pure substance. Such as water air and nitrogen a pure substance does not have to be a single element or compound Pure substance means does substance that contains only one particles ex.water |
|
| 3354. |
define moment of inertia and give formula and physical significance |
|
Answer» The tendency of an object to resist a change in it\'s state of rest or of uniform motion is called inertia The si unit of inertia is kgm Don\'t know |
|
| 3355. |
What will be the effect of Cooling on rate of diffusion |
| Answer» Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the\xa0rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the\xa0rate of diffusion. Solvent density: As the density of a solvent increases, the\xa0rate of diffusiondecreases. | |
| 3356. |
When a carpet is beaten with a stick,dust comes out of it.Explain. |
|
Answer» Because of Newton first law of motion ( when we not beat a stick on a carpet its partical of dust in it is in rest and when we beat a stick on it they come in motion and dust comes out of it ) Because of Newton first law of motion ( when we not beat a stick on a carpet its partical of dust in it is in rest and when we beat a stick on it they come in motion and dust comes out of it ) |
|
| 3357. |
Define kinetic energy derive the formula for kinetic energy |
| Answer» The energy which an object has becavse of its motion is called it\'s kinetic energy and formula to derive is k,e= force ×displacement | |
| 3358. |
Which method used to liquify the gases? |
|
Answer» By applying pressure and by increasing temperature Meaning of compression Compression |
|
| 3359. |
What at room temperature is a liquid |
|
Answer» Mercury meecury Mercury Mercury is the Answer Mercury |
|
| 3360. |
Atomic number of sulfer |
|
Answer» Atomic number of sulfur = 16 16 Which of the following matter ? it\'s suplhur Atomic number of sulphur=16 |
|
| 3361. |
4.Mention the features of all chordates. |
| Answer» Features are:\tHave a notochord\tHave a dorsal nerve cord\tare triploblastic\tare coelomate | |
| 3362. |
I am not able to use the referal code of cbse guide can u help me how to do so |
| Answer» Sar Mumbai mein kya denge | |
| 3363. |
How can we distinguish between a colloidal and a true solution. Explain with the help of diagram |
|
Answer» The answer to given questions are as follows -A1 - True solution is a mixture of homogenous particle which dissolve easily making the solution transparent. Colloidal solution is a mixture of heterogeneous mixture, which don\'t dissolve and hence form translucent or opaque solution.A2 - In smoke, dispersion medium is gas while dispersed phase is solid.In fog, dispersion medium is gas while dispersed phase is liquid.In cloud, dispersion medium is gas while dispersed phase is liquid.A3 - Colloidal solution is a heterogeneous mixture due to presence of different sized particles present in the solution. The solution appears to be homogenous due to very small size of small particles, which is not visible by naked eye.A4 - Colloidal solution from given options is - soap + water mixture and fog. What are the three parts of the western coastal plains? |
|
| 3364. |
How to solve average speed and acceleration |
| Answer» Avg speed = total distance/total time takenAcceleration = change in velocity/ time | |
| 3365. |
Reply plz my questions define democracy |
|
Answer» *Democracy is a form of government in which the ruler are elected by the people . *Democracy is a form of government in which rule over the country of the people,for the people ,by the people. Thnks Democracy is a form of government in which the people have authority to choose their governing legislator..... In a direct democracy, the people directly deliberate and decide on legislation. |
|
| 3366. |
What does SONAR stand for? |
|
Answer» Bangla Bangla |
|
| 3367. |
What are the functions of Nucleus ? |
|
Answer» Nucleus plays an important role in cellular activities like reproduction *it is control centre of cell *it control cell division. |
|
| 3368. |
What happened if a cell become devoid of cell membrane |
| Answer» Without nucleus the cell will lose its control also the cell will not know what to do and there would be no cell division gradually cell may die : i hope it\'s useful to u ? | |
| 3369. |
What is the full form of RNA and what are the importance of RNA |
|
Answer» And what are the importance of RNA full form of RNA is ribo nuclei acid |
|
| 3370. |
Difference between Average speed and Instantaneous speed? ( Answer me friends)?? |
| Answer» Average speed is the distance traveled divided by the time during which the motion occurs. ... Its\xa0speed at a specific instant in time, however, it is instantaneous speed | |
| 3371. |
Difference between the vaporisation and the evaporissation |
|
Answer» Vaporisation can change the state of matter from a solid or liquid to a gas. During\xa0Evaporation the liquid state of matter is turned directly into a gas. ... As for\xa0evaporation , only the top level of water is turned into gas. When\xa0vapourisation occurs, molecules could come from below the surface when the liquid is boiling. When matter directly changes from liquid state to gaseous it uses more energy it is called vaporisation but in the case of evaporisation, liquid changes slwly from the surface of the liquid and it requires less energy to chnges its state to gas. |
|
| 3372. |
What does the path of an objectlook like when it is in uniformmotion? |
|
Answer» Yes? The path of a object is a straight line |
|
| 3373. |
What is Beyond the Matter?? |
|
Answer» Yes it\'s true that every matter is very far from each other but I mean there are more matters which are not senseable to human being but it can exist It can be invisibe and it can made with other basic particles just like Atoms ?? There are two answers to this question: 1. No, matter is not everywhere and, 2. I don\'t know.One of the amazing things that one learns in studying either Particle Physics (the study of REALLY small stuff) or Cosmology (the study of REALLY BIG stuff) is that you realize there is a lot of nothing in the universe. There is a lot of space that really has nothing in it. "Nothing" is sort of a tough and often confusing concept for our little human brains to comprehend. Relative to the size of things in our universe, the space between the things is huge. People are confused because so many popular images and even school science text books often show planets or stars near enough to each other that you can see several at the same time. Other than the moon and the sun, everything else in our universe is so far away that they appear as just points to our naked eyes. |
|
| 3374. |
Difference between animal cell and plant cell and Prokaryotic and eukaryote |
| Answer» Eukaryotic cells are more complex and larger than prokaryotic cells. Animal and plant cells contain many organelles not found in prokaryotic cells. Prokaryotes have no true nucleus as the DNA is not contained within a membrane, but is coiled up in a region of the cytoplasm called the nucleoid. | |
| 3375. |
What are the states of matters? |
|
Answer» There are three common states of matter:\tSolids\xa0– relatively rigid, definite volume and shape. In a\xa0solid, the atoms and molecules are attached to each other.\tLiquids\xa0– definite volume but able to change shape by flowing. In a\xa0liquid, the atoms and molecules are loosely bonded.\tGases\xa0– no definite volume or shape. Solid liquid and gas more 2 are there plasma and bose Einstein The 3 states of matter are solid, liquid and gas. There are 2 more state of matter they are plasma and Bose Einstein condensate SolidLiquidGasPlasmaB.E condercants Solid liquid gaseous |
|
| 3376. |
Onion peel and human check cell therory |
| Answer» Go to the book seller (or borrow) srijan publisher\'s (A Simple study of biology) In that book page no. 59 and 60 are having both the activities (well explained). Well.. here\'s the conclusions for you:-1) In onion peel cells- onion bulb is formed of numerous cells. The cells are plant cells because of the presence of cell wall and large vacuole. 2) In human cheek cells- our bodies is formed of cells. The cells are animal cell as each cell has only a cell membrane and its outer boundary. Cell wall , central prominent vacuole and plastids are absent. ~ Hope it helps ? | |
| 3377. |
To prepare a temporary mount of onion peel cell and study its structures. |
| Answer» Go to the book seller (or burrow )and buy srijan publisher\'s (A Simple study of biology) in that book page no. 59 and 60.. both the activities are given onion peel also and... Human cheek cells also... Well here\'s the conclusions :-1)In onion peel- Onion bulb is format of numerous cells. The cells are plant cells because of the presence of cell wall and large vacuole. 2)In human cheek cells- our body is formed of cells. The cells are animal cells as each cell has only a cell membrane and its outer boundary. Cell wall, central prominent vacuole and plastids are absent. | |
| 3378. |
What is a vector quantity |
|
Answer» 1) They have both magnitude and direction. 2) This quantity must need specify the direction along with the magnitude. 3) Vectors cannot divide each other. The quantity which has magnitude as well as directio A quantity that has both Magnitude and direction. The quantity which has (numerical value) magnitude an direction both , is known as vector quantity. It is a physical quantity having both magnitude as well as direction example velocity displacement |
|
| 3379. |
Convert the temperature to the Kelvin scale 25°C.. |
|
Answer» 25° +273=298 298k hottu Temperature in kelvin =temperature in 0 Celsius +273 so 25 degree Celsius equal to C (25+ 273)k =298k Temperature in kelvin =temperature in 0 Celsius +273 so 25 degree Celsius equal to C (25+ 273)k =298k |
|
| 3380. |
Defferentiate scalars and vectors |
|
Answer» ?????? ???????? :- 1) They have only magnitude not direction. 2) This quantity can be a number and unit. 3) Scalar can divide another scalar. ?????? ???????? :- 1) They have both magnitude and direction. 2) This quantity must need specify the direction along with the magnitude. 3) Vectors cannot divide each other. Scalar quantity are those quantity in which it has only magnitude and vector quantity are those those quantity in which direction and magnitude both involved Scaler quantities are the quantities which have magnitude not direction . Vector quantities are the quantities which have both magnitude and direction . Scaler quantities are the quantities which have only magnitude not direction .Vector quantities are the quantities which have both magnitude and direction . Scalar means that quantity that have only magnitude not a specific directions whereas vector quantity have both magnitude and specific direction.E.g= distance is scalar quantity while displacement is a vector quantity . |
|
| 3381. |
What is the advantage of having deeply folded membrane in mitochondria? |
| Answer» It increases the space for atp generation | |
| 3382. |
Class 9 sample paper |
| Answer» | |
| 3383. |
Air is homogeneous or heterogeneous mixture ? |
|
Answer» Heterogeneous mixture Homogeneous mixture Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances. Salt, sugar, and many other substances dissolve in water to form homogeneous mixtures. Darshan |
|
| 3384. |
Please send notes of the fundamental unit of life |
| Answer» 1. All the living organisms are made up of fundamental unit of life called\xa0“ cell”.2. The cell is a Latin word for\xa0“a little room”.3. The scientist Robert Hooke saw a little room in the cork (the bark of a tree) resembled the structure of a honeycomb. The use of the word “Cell” to describe these units is used till this day in Biology as” Cell Biology”.4. The\xa0Compound Microscope\xa0consist eye piece,objective lens and condenser to observe a cell after putting a drop of Safranin (for plant cell) and methylene blue (for animal cell).5. The scientist\xa0Leeuwenhoek saw free living cells\xa0in the pond water for the first time.(father of microbiology)6. The scientist\xa0Robert Brown discovered the nucleus\xa0in the cell.7. The\xa0cell theory\xa0states that all the plants and animals are composed of cells, it was\xa0proposed by Schleiden and Schwann.8. The\xa0cell theory\xa0was further expanded by Virchow by suggesting that “all cells arise from the pre-existing cells”.9. The cells differ in size, shape, structure (Please refer to Fig. 5.2/5.3: Onion peel/Various cells in Human body, NCERT Book Page-57/58):\xa0Types of cells: Onion cells, Smooth muscle cell, Blood cells, Bone cell, Fat cell, Nerve cell, Ovum, Sperm etc. Each kind of cell performs specific function.10. A single cell may constitute a whole organism as in\xa0Amoeba, Chlamydomonas, Paramecium and Bacteria; these are called as\xa0unicellular organisms. Whereas in multi-cellular organisms (Human beings) division of labor is seen.11. The feature in almost every cell is same: Plasma membrane, nucleus and cytoplasm.12.\xa0Plasma membrane: It is the outermost covering of the cell.It is called as selective permeable membrane (because it prevents movement of some materials).It helps in\xa0diffusion\xa0and osmosisDiffusion: movement of substance from high concentration to low concentration.Eg; exchange of carbon dioxide or oxygen with external environment.Osmosis: it is the passage of water from the region of high water concentration to a region of low water concentration through a selective permeable membrane.a) The cell gains water, if the medium surrounding the cell has a higher water concentration (Hypotonic solution)\xa0than the cell.b) The cell maintains the same water concentration as the cell (Isotonic solution), water crosses the cell membrane in both directions.c) The cell loses water, if the medium has lower water concentration (Hypertonic solution)\xa0than the cell.Note\xa0- The cell drinking is endosmosis;omission of water is called ex-osmosis.13. The cell engulfs food is called endocytosis and ejects solid is called exocytosis. Amoeba acquires food through endocytosis and excretion of solid is called exocytosis.14. The cell wall\xa0is a rigid outer covering composed of cellulose. It provides structural strength to plant cells. When a living cell loses water, there is shrinkage of contents of a cell away from the cell wall. This phenomenon is called as\xa0plasmolysis.\xa0The cell walls permit the cells of plants, fungi and bacteria to withstand very dilute (Hypotonic) external media without bursting.15. The Nucleus: It is a dark colored, spherical or oval, dot-like structure near the center of a cell called Nucleus. The nucleus plays a central role in cellular activities/reproduction. The chromatin material gets organized into chromosomes. The chromosomes containinformation for inheritance of features from parents to next generations in the form of\xa0DNA\xa0(Deoxyribo Nucleic Acid ) and protein molecules. The functional segments of DNA are called genes.16. In some organisms like Bacteria nucleus is not covered by nuclear membrane. Hence it is called as\xa0prokaryote.\xa0(Pro= primitive; karyote = karyon = nucleus.) The organisms with cells having a nuclear membrane are called\xa0eukaryotes.17.\xa0Differences between prokaryotes and eukaryotesProkaryotesEukaryotesSize: generally small (1-10 µm)Size: generally large. (5-500 µm)Nuclear region: Not well defined and not surrounded by a nuclear membrane & known as nucleoids.Nuclear region: Well defined and surrounded by a nuclear membraneChromosome: SingleChromosome: More than one ChromosomeMembrane-bound cell organellesAbsentMembrane-bound cell organellespresentEg- bacteria, blue green algaeEg fungi, plant cell and animal cell.18.\xa0Cell organelles: Every cell has fluid matrix (other than nucleus) is called cytoplasm. The nucleus and cytoplasm is together called as protoplasm. The protoplasm term was coined by Purkinje. It has important cell organelles: Endoplasmic Reticulum (ER), Golgi apparatus, Lysosomes, Mitochondria, Plastids, and vacuoles.19.\xa0Endoplasmic Reticulum (ER):\xa0It is a large network of membrane –bound tubules and vesicles.There are two types of Endoplasmic ReticulumRough Endoplasmic Reticulum (RER) (It looks rough because Ribosome’s are attached to its surface. They are the sites of protein synthesis).Smooth Endoplasmic Reticulum (SER) (It looks smooth because Ribosome’s are not attached to its surface. They are the sites of fat molecules synthesis).1. SER; help in the functioning of enzymes and hormones to carryout biochemical activities.2. SER detoxifies many poisons and drugs from the cell.3. ER serves as channel for the transport of material between various regions of the cytoplasm and the nucleus.4. Proteins and fat molecules produced by ER helps in membrane biogenesis.21.\xa0Lysosomes: They contain membrane-bound sacs with powerful digestive enzymes (enzymes are made by RER) to digest the worn-out cell organelles. When the cell gets damaged, lysosomes may burst and the enzymes digest their own cell, hence called as “Suicidal bags of a cell”. It is a waste disposal system of the cell.22.\xa0Mitochondria: It is covered by a double membrane. Outer membrane is very porous and the inner membrane is deeply folded. These folds create a large surface area for ATP (Adenosine Triphosphate) molecule synthesis. ATP is the energy currency of a cell; hence the Mitochondria are called as Power House of a Cell. Mitochondria have their own DNA and Ribosome’s; therefore they can make their own proteins.23.\xa0Plastids:\xa0They are present only in plant cells. They are of two types.1.\xa0Chromoplasts\xa0(Colored Plastids: Chloroplasts – Green pigmented and useful in Photosynthesis and also contains various other pigments like yellow or orange)2.\xa0Leucoplasts\xa0(White or colorless plastids; stores materials such as oils, proteins, fats etc. ) Plastids are also covered by a double membrane. The matrix is called Stroma, seat for enzymatic actions. Plastids have their own DNA and Ribosome’s; therefore they can make their own proteins.24.\xa0Vacuoles: Storage sacs for solid or liquid contents. They are small in size in animals while plants have large, may occupy 50-90 % of the cell volume. Helps to provide turgidity and rigidity to the cell. Many substances like amino acids, sugars, organi acids and proteins are stored in vacuoles. In Amoeba food vacuole is specialized to play an important role.25.\xa0Cell:\xa0It is the fundamental structural unit of living organisms, helps in respiration, obtaining nutrition and clearing waste material or forming a new protein.Differences between Plant cell and Animal CellANIMAL CELLPLANT CELLCell wall absentCell wall presentPlasma membrane is the outer layer which provides turgidity to the cellCell wall is the outer layer which gives rigidity and turgidity to the cellVacuoles are small in sizeVacuoles are big in sizePlastids are absentPlastids are presentNucleus lies in the centre.Nucleus lies on one side | |
| 3385. |
Write down three basic characteristics of a cell |
|
Answer» Basic characteristics of a cell are as follows:(i) Cell is structural and functional unit of all living beings.(ii) Cells can replicate independently.(iii) Cells perform all the life sustaining activities by themselves 1) Cell are the building blocks of all plants and animals. 2) A cell is capable of independent exist and perform all the basic functions of life. 3) The old and worn out cells are continually replaced by new cells. Cell membrane . Cytoplasm . And DNA Emsmsn |
|
| 3386. |
What produces more serve burns boiling water or steam ? |
| Answer» Steam has more energy than boiling water. It possesses the additional latent heat of vaporization. ... Steam has more energy than boiling water. Therefore, burns produced by steam are more severe than those produced by boiling water. | |
| 3387. |
Show diagramatically, how will you separate two immiscible liquid |
| Answer» Separation of\xa02\xa0Immiscible liquids is done using a separating funnel. The above figure shows a separating funnel clamped to a stand. In this case the mixture to be separated contains oil and water.Immiscible liquids do not mix well and have different densities. When the mixture is left undisturbed, the denser liquid comes to the bottom of the funnel, and the lighter liquid stays on top of it. Now by operating a stopcock carefully, one can transfer the denser liquid (here, water) to the conical flask. The stopcock is closed when water is completely transferred from the tunnel. The separation is done multiple times to ensure complete separation of the two components. Oil remains in the funnel and water is in a conical flask. | |
| 3388. |
Tabulate the differences in the characteristics of states of matter? |
|
Answer» . Matter are very very small in size.matter have space between them.particles of matter are constantly moving.particles of matter attract each other I am not able to tablute so sorry The difference in the characteristics of three states of matter-(i) Shape-\xa0Solid has fixed formliquid has no fixed shapegas has no fixed shape (ii) Volume-Solid has fixed volumethe fluid has fixed volumegas has no fixed volume(iii) Rigidity/fluidity-Solids are rigid and cannot flowfluid can flow and have no any rigiditygas can flow and have no rigidity(iv) Intermolecular force and space-Solids have a high intermolecular force and less spaceliquid has an intermediate intermolecular force and has space more than solidsGas has a very less intermolecular force and has high space Popat |
|
| 3389. |
How do substances like co² and water move in and out of the cell ?Discuss |
| Answer» The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO2 and water is higher in external environment than that inside the cell, CO2 and water moves inside the cell. | |
| 3390. |
Derive a=mv^2/r |
| Answer» Fc\xa0=\xa0m v2\xa0/\xa0rThe net force on an object moving in a circle provides the centripetal force, Fc\xa0=\xa0m v2\xa0/\xa0r, necessary to keep an object moving in a circle. | |
| 3391. |
Diagram of cell |
|
Answer» photos are not able to send her Photos are not able to send here |
|
| 3392. |
Define the sublimation |
|
Answer» Conversion of solid into gas is known as sublimation It is a process in which solid converts into gas upon heating is called sublimationEg:- Napthalene ballNh⁴ cl Akiawbanak |
|
| 3393. |
Define the boiling |
| Answer» When the whole amount of water or any other liquid is heat . | |
| 3394. |
Notes of chapter 1 of class 9 |
|
Answer» See in this app On CBSE guide app Choose subject > Choose chapter > CBSE revision notes Which subject |
|
| 3395. |
Name the type of motion in which a body has uniform speed but not uniform velocity. |
| Answer» | |
| 3396. |
What is the main chapter in science |
|
Answer» Structure of atom Fundamental unit of life Force and pressure |
|
| 3397. |
What is the definition of fusion |
| Answer» Fusion. The phenomenon of change of solid into liquid is termed as\xa0fusion. For instance, melting of ice. | |
| 3398. |
Differentiate between the cheek cells and onion peel cells |
|
Answer» Nice Main difference is Cheek cells are animal cell and Onion peel cell are plant cell other difference are same of animal cell and plant cell Kdjdjjd |
|
| 3399. |
What is tonicity? |
| Answer» Tonicity is a measure of the effective osmotic pressure gradient; the water potential of two solutions separated by a semipermeable cell membrane. In other words, tonicity is the relative concentration of solutes dissolved in solution which determine the direction and extent of diffusion. | |
| 3400. |
Sodium chloride from it\'s solution in water |
|
Answer» Yes Matter |
|