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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.
| 67801. |
What are the law of refraction |
| Answer» 1 The incident ray, the refracted ray and normal all lie in same plane2 the ratio angle of incident ray and angle of reflected ray is always constant angle i/angle r = constant | |
| 67802. |
What happens when current carrying conductor is placed in a magnetic field |
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Answer» A force is produced in it, According to left hand rule of Fleming Force is produced on current carrying conductor |
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| 67803. |
All contraceptive methods explain please |
| Answer» | |
| 67804. |
What is the importance of sample paper issued by board? |
| Answer» Practice of lots of .......Kis types ke questions aate hai board main pta chalta hai ........ | |
| 67805. |
What is double fertilisation and contraceptive methods |
| Answer» N double fertilization when male gamete enters the Pollen tube it divides into two and one gamete fuses with the egg and other they meet physics with the polar nuclei and the nuclei becomes secondary nucleus this is known as double fertilization .contraceptive methods are those methods which are used for birth of fertility control | |
| 67806. |
What is accomodation of the eye |
| Answer» The ability of eye lens to see both near and distant objects ajust its focal length is called accomodation of eye | |
| 67807. |
What is p.o.p |
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Answer» Its plaster of paris......... Its name is calcium sulphate hemi hydrate. Plaster of precipitate Plaster. of paris, CaSO4.halfH2O It is Plaster of Paris with formula CuSO4.1/2H2O |
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| 67808. |
Why unsaturated hydrocarbon convert into saturated hydrocarbon while it is harmful for health? |
| Answer» It is because Unsaturated Hydrocarbon contain unsaturated Fatty acid which should be choosen for cooking.And Saturated Hydrocarbons contain saturated Fatty acid, which is harmful for health.Vegetable oils used for cooking are long unsaturated hydrocarbons which are healthy. Whereas animal fats such as vanaspati are saturated hydrocarbons and unhealthy for consumption. It can solidify and block the arteries of the heart. | |
| 67809. |
Explain carbondating method |
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Answer» The determination of the age or date of organic matter from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains.The ratio between them changes as radioactive carbon-14 decays and is not replaced by exchange with the atmosphere. In this method isotope of carbon is used which is radioactive(emitts radiations) and this rays are obtained when atoms are broken up. Then this rays are used to identify the age of fossils. |
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| 67810. |
Explain evolution |
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Answer» A slow an gradual change which are brought about in a living organisms with the passage of time when they change into more complex organinsms for simple oraganisms. Evolution: The change in inherited traits in biological population over subsequent generations is called evolution. Scientists have proven that life evolved in the form of simple unicellular organisms on this earth; and all the organisms which are present today have evolved from a common ancestor. The idea of evolution is based on the premise of a common ancestry. Evolution is a scientific theory used by biologists. It explains how living things change over a long time, and how they have come to be the way they are........ |
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| 67811. |
Define term dna |
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Answer» Most organisms contain DNA except some viruses which contain RNA as their genetic material. DNA was discovered by two scientists- Watson and Crick and their model of the structure of DNA are called the Watson and Crick model.The structure of DNA is said to be a double- helical structure with two strands of DNA that are wound around each other. Each strand of DNA is made up of a sequence of nucleotide monomers. Each nucleotide is made up of:\tDeoxyribose sugar\tOne of the four nitrogen bases\tPhosphate group DNA (deoxyribonucleic acid), a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.............. |
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| 67812. |
Advantages of variations in organisms |
| Answer» *It provides basis of evolution.........*it helps to maintain life in adverse conditionhelps in survival of species.........*a variation in organism makes it developed than others......... *it even helps many organisms to survive........ | |
| 67813. |
"Evolution should not be equated with progress"Explain. |
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Answer» Evolution cannot be equated with progress.\t\xa0Evolution is not exactly taking place from lower organisms to higher organisms but it can be related to the fact that higher and complex body forms evolved even when the low and simple forms are still existing. An individual also plays an important role in the evolutionary process. An individual contributes its specific genes into the gene pool of the population during transferring its genetic variations to its offspring.\t\xa0These variations are carried on to successive generations by natural selection.\t\xa0If these genetic variations get accumulated over a period of time, alter the individuals of the subgroup and later give rise to new species. Ncert me diya h.... |
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| 67814. |
Name the material transported by Pulmonary artery and Pulmonary vein? |
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Answer» Pulmonary Artery - Carries impure blood from right ventricle to lungs.Pulmonary Vein - Carries pure blood from lungs to left auricle or atrium Pulmonary artery:-It carries de-oxygenated blood to the lungs.Pulmonary vein:-It carries oxygenated blood to the heart |
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| 67815. |
How does phototropism occur on plants. |
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Answer» Put a germinating seed in the vessel. Seal the top of the vessel. Put it in a cardboard which is open to one side. Allow light from window comes on this plant. After few weeks shoot grows towards light and root bend away from the light. Photo means light that meams movement of plants towards light. It can either be towards light or away from light. In this the specific part of a plant moves in response to light stimulus.... Bhai ye iska answer ncert book me h.... |
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| 67816. |
Why calcium metals after reaction with water starts floating on its surface |
| Answer» The reaction of calcium with water is not so violent. So the heat released is not sufficent for hydrogen to catch fire. Calcium start floating beacause the bubbles of hydrogen gas that form during reaction stick to the surface of the metal and hence calcium floats on water. | |
| 67817. |
Defination of Evolution....give only from NCERT textbook |
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Answer» Evolution is a sequence of gradual changes which takes place in primitive organisms over a million of years A slow and gradual change which are brought about in a living organisms with the passage of time when living organisms change into more complex forms. Ni need now bcoz Aryan has given me answer...lol???? Go through ncert text u will get .? When there is error for dna copying for generation and generation then after many generation a unique offspring will born is called evolution |
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| 67818. |
Why the colour of sky appears blue on the clear day |
| Answer» Our sky contains many small colidal particles like smoke, water droplets,etc. And as we know that particles with short wave length scater blue light this is the reason why the sky appears blue | |
| 67819. |
What is difference between meiosis and meiotis |
| Answer» Osmium | |
| 67820. |
Distinguish between short circuiting and overloading |
| Answer» The difference between short circuiting and overloading is short circuiting means phase wire and neutral wire are short each other unexpectedly. Overloading means increase the current value over rated view. | |
| 67821. |
Defination of Genetic Drift |
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Answer» The change in the frequency of genes due to an accident when the variations give no survival advantage is the notion of genetic drift. Sudden change in the gene frequency by any natural calamity GENETIC DRIFT:-Thr random change in the gene frequecy occuring by chance irrespective of its being benefical and harmful is called Genetic Drift. |
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| 67822. |
How to baby reproduse? |
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Answer» Baby cant reproduce Refer ur NCERT |
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| 67823. |
Machanism of breathing in humans |
| Answer» Inhalation n exhalation...elaborate it | |
| 67824. |
Name the fluid that protects the brain from further shock absorption |
| Answer» Cerebrospinal fluid...... | |
| 67825. |
Why sun appears oval in shape at sunrise and sunset while it appears round at noon???? |
| Answer» At sunrise and sunset, the sun is near the horizon. The rays of light from the upper part and lower part of the periphery of the sun bend unequally on travelling through earth\'s atmosphere. That is why the sun appears oval or flattened at the time of sunrise and sunset.At noon, the sun is overhead. The rays of light from the sun enter earth\'s atmosphere normally. Therefore, they suffer no refraction or bending on passing through earth\'s atmosphere. Hence the sun appears circular at noon. | |
| 67826. |
"A trait may be inherited but, not be expressed " explain the term |
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Answer» Check in oswaal Mendel\'s first law of inheritance... ?? |
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| 67827. |
Name the largest artery in heart |
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Answer» It\'s aorta Aaorta Aorta is the largest artery in human Heart Aorta..?? |
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| 67828. |
Silicon is also tetravalent. But why can\'t it form long chain compounds like carbon???? |
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Answer» because silicon has larger size...hence it can not make as strong bonds as carbon can make due to its smaller size. . Because not a strong covalent compount compare to carbon |
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| 67829. |
By sexual reproduction means |
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Answer» When male gamate fuse with female gamate internally The fusion of male and female gamate kknown as feritlization The male and female gamete fuse internally |
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| 67830. |
anomolies of mendeleev periodic table any five |
| Answer» Explation about istopesFixed position of hydrogen | |
| 67831. |
List the products of combustion of fossil fuels. What are their adverse effects on the environment? |
| Answer» CO2,CO, greenhouse gases etc. They deplet ozone layer. They do harm to our body and lungs.if these are in excess upon air then we can get killed | |
| 67832. |
How can we define rancidity |
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Answer» When oil and fat substances come in the contact of air thry react with oxygen and their smell and taste change. This process called rancidity Chemical decomposition of oils and fats . Spoils food mayerials that makes difficult for consumption Rancidity is a process in which aerial oxidation of fats and oils Undesirable change that takes place in oil containing food items due to the oxidation of fatty acids. |
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| 67833. |
How doea evolution occur ? Describe how fossils give evidences in support of evolution. |
| Answer» ¤natural selection¤genetic driftAre the major factor that determine evolutionFossils trace the evoulutionary relationship of animals million years ago | |
| 67834. |
Why didi Mendel select garden pea plants for his experiments |
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Answer» Life cycle were short, number of generations can be studied, it has 7 pair of contrasting characters,it is easy to grow, it produced large number of seed and it could be easily cross pollinated by removing the stamens. And they were self pollinating. Because they reproduced fastly and had less character for differentiation |
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| 67835. |
Define reflection and refraction and differences between reflection and refraction |
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Answer» Reflection is bouncing of ray of light. The bending of ray of light from 1 medium to another is called refraction. Reflection is the process of bending of ray back from the surface . refraction is the going the ray from one medium to another medium and in this light bends towards the normal. Two difference are made from definition 3)angle i= angle r in reflection but in refraction there is nothing like that. |
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| 67836. |
Functions of all respiratory system?? |
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| 67837. |
What is P.V.C. |
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Answer» The full form P.V.C. is polyvinyl chloride. These are use in i.e. Our Home appliances and in transformation of water through PVC pipe lines etc............ Fast Answered below |
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| 67838. |
What i luimph |
| Answer» a colourless fluid containing white blood cells, which bathes the tissues and drains through the lymphatic system into the bloodstream. | |
| 67839. |
Which is largest gland in human body |
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Answer» Liver is largest gland but it is exocrine gland Liver |
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| 67840. |
what are the advantages and disadvantages of vegetative propagation |
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Answer» Disadvantages Advantages and Disadvantages of Vegetative Propagation are as follows:\tADVANTAGESDISADVANTAGES\t\tFaster and more certain method of propagation.Does not produce new varieties.New individuals produced have exactly identical qualities as their parents. This preserves the characteristics of food and flower crops.Leads to overcrowding around the parent plant.Can be used to reproduce plants that do not have viable seeds.Very little possibility of dispersal.The flowers produced are of superior quality.Certain desirable characteristics present in the fruit can be maintained.\t |
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| 67841. |
What is archeopatrix |
| Answer» Archeopteryx is an organism that lived in past that had the features of both modern birds and dinosaurs\xa0(reptile).It was able to fly.Reptilian features1) had solid/heavy bones2) had jaw with teeth inside3) Had tail with bones inside.Avian (bird) features1) Had feathers2) Had wings3) Had beak\xa0 | |
| 67842. |
when length of a wire is doubled what is change in resistivity |
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Answer» Resistance is directly proportional to length if l is doule so r is four times There would be no change in resistivity of the wire as it does not depend on the length, area of the substance. It depends on the nature of the substance and temp.\xa0 It will become half |
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| 67843. |
How phototropism does occure in plants |
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Answer» Movement of shoot towards light is called phototropism. This movement is caused due to more growth of cells towards the shaded side of shoot as compared to the side of shoot towards light. More growth of cells is due to secretion of auxin towards the shaded side. The directional movement of a plant in response to light is called phototropism. The shoot responds by bending towards light and roots respond by bending away from light.This happens as follows:(i) When sunlight falls straight on the plant, the auxin hormone synthesised at the tip of the stem spreads uniformly down the stem and due to equal concentration of auxin, stem grows straight.(ii) When sunlight fells on only one side of the plant, the auxin diffuses towards the shady side of shoot. The concentration of auxin stimulates the cells to grow longer. Therefore, the stem appears to bend towards the source of light.\xa0 Plants such as sunflower bend towards the side from which more sunlight is coming. |
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| 67844. |
DNA is found in_ |
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Answer» Nucleus of the cell Nucleus of the cell Nucelus not in gene Genes |
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| 67845. |
What is the lowest level of food chain ? |
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Answer» Rhagav bhatia u r absolutely right There can be many answers, depending on what kind of foodchain you are talking about. For ex - for grassland, it is grass; for see, it is phytoplanktons, etc. Grass...... Shayad |
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| 67846. |
Which diagrams are important from biology in the 2019 board exam? |
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Answer» All rays diagram is important .... Brain, neuron, ******, *****, heart, lungs, they are very most important diagrams. Diagram of heart, brain (believe me, it has come in the boards), female reproductive system, flower Each and every pictures that we see in our NCERT science textbook are important.??? |
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| 67847. |
On which things we depand to succes in life? |
| Answer» Reading, playing, learning | |
| 67848. |
What is a power of accomodation |
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Answer» The ability of eye lens to adjust it\'s focal length with the help of ciliary muscle is called power of accommodation. The ability of the eye to focus nearby as well as distant object on the retina by the help of ciliary muscles is called power of accomodation The ability of an eye to focus the distant objects as well as near by objects on retina by changing the focal length of its eye lens is known as power of accomodation Sorry it will be of instead of if The ability if eye lens to see both near and distant object adjust its focal length is called power of accomodation |
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| 67849. |
What is burning splinter |
| Answer» A burning matchstick is called a burning splinter in scientific language | |
| 67850. |
Why gold widely used for making jwellery? |
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Answer» Yogita Ingle you are so talented Gold is used for making jewellery because of the attractiveness of its luster and because of its rarity. It also doesn\'t tarnish and doesn\'t react with air the way a metal like iron does. Gold is malleable, which means it can be beaten into very thin sheets. It\'s also ductile, which means it can be stretched out into thin wire as in the findings of earrings. |
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