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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.
| 45751. |
What is the effect of corrosion of metal |
| Answer» 1) metal become week 2) sometimes color of metal also changes3) metal lost its basic properties | |
| 45752. |
Wgat is refrective index |
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Answer» Refractive Index is the extent of change of direction of light in a given pair of media. The refractive index is a relative value of speed of light in the given pair of media. Thus, to calculate the refractive Index the speed of light in two media is taken. It us the ratio of speed of light in vacuum to speed of light in the given medium |
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| 45753. |
relationship between intensity of light and wavelength |
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Answer» Intensity is inversely proportional to wavelength raise to the power 4 intensity of light is directly proportional to its wavelength |
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| 45754. |
A white powder is used to make cast to support fractured bones |
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Answer» Plaster of Paris the substance used to treat the fractured bones.The chemical name of the powder is known as calcium Sulphate Hemihydrates.\xa0The formula of the Plaster of Paris is2CasO4.1/2 H20 CaS04.1/2 H20 + 11/2 H20 → CaSO4.2H20\xa0 POP plaster of paris caso4.1/2H2O Plaster of paris (P.0.P= |
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| 45755. |
What happens when ethanol reacts with acidified potassium dichromate solution |
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Answer» When ethanol is heated in the presence of acidified potassium dichromate, the orange dichromate is reduced to green solution of Chromium(III) ions. This reaction is an oxidation reaction and acidified potassium dichromate oxidizes ethanol to ethanoic acid.This reaction may as well be used to produce ethanal which is an aldehide only when the product is distilled immediately as it forms. But when distillation is not done, further oxidation takes place to produce ethanoic acid. forms c2h4 +h2o |
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| 45756. |
What is Neurocysticercosis? |
| Answer» Neurocysticercosis is a neurologic parasitic disease caused by the encysted larva of the tapeworm Taenia solium and is the most important parasitic disease of the human central nervous system. | |
| 45757. |
Example of ideal fuels |
| Answer» An ideal fuel is one that on burning does not emit harmful gasses, gives more heat per weight, should burn optimally i.e. neither too fast nor too slow, and many other features.\xa0Natural Gas is as close as you can get to an ideal fuel. It requires minimal processing before use and it has high calorific value. Due to its gaseous state, it mixes with oxygen easily for more efficient combustion. By producing relatively few pollutants, it also helps to reduce emissions that can contribute to the greenhouse effect. | |
| 45758. |
What is the most characteristic feature of Non Biodegradable substance |
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Answer» The non-biodegradable substances do not break down or dissolve for many years. Because of that, they can be recycled and reused. So, instead of throwing wastes in the garbage, it can be dumped in a proper recycling place making it useful for other purposes.Non-biodegradable materials are not easily affected by the natural process as they do not react with and dissolve in the soil easily. Some of these items that are commonly used in day to day lives are plastic products, aluminum cans, bottles, metal scraps, glasses, grocery bags and Styrofoam (polystyrene). These and other non-biodegradable items have to be stored properly after use so that they can be recycled. \tEnzymes which are used in the degradation of the substances are specific in their action and specific enzymes are needed for the breakdown of a particular substrate and that is why all bacteria cannot decompose all kinds of waste.\tThe non-biodegradable substances are acted upon by physical processes like heat and pressure.\tNon-biodegradable substances are inert. |
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| 45759. |
Basal metabolism is controlled by which gland |
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Answer» The thyroid secretes thyroxin. It controls basal metabolic rate (BMR), growth and differentiation of the body. basal metabolism rate is control by thriod glang hormon T3 & T4 I think so ...thyroid gland..but not clear..?? |
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| 45760. |
Activities for chapter acids, bases and salts |
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| 45761. |
What is the SI unit of magnetic field strength ? |
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Answer» Tesla Tesla SI unit and Gauss CGS unit Tesla.. Tesla |
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| 45762. |
Why adernal gland is present on just above the kidneys?? |
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| 45763. |
What do u mean by masterbation? What are its symptoms if some one is masturbating? |
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| 45764. |
Smell of clove oil, onion paste and vanila extract in acid ,base and neutral solution |
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Answer» In acid smell remainsBase smell disappears Olfactory.. |
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| 45765. |
What is an acid? |
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Answer» Acid is sour in taste and turns blue litmus to red Its ok Substance that donate H+ ions in aqeous solution |
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| 45766. |
Name the thin memberane covering lungs in human |
| Answer» Pluera | |
| 45767. |
Give reasons : Use of synthetic detergents causes pollution of water. |
| Answer» Life can be possible only in narrow ph value of 5.4 to 8.2 but when detergents are added in it ph vale inceases too much thats why it became useless and be called polluted. | |
| 45768. |
electricheaterof1000wfor5hoursdaily |
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Answer» E =w/t 5kwh |
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| 45769. |
Which is the most expensive element in this world that costs $1billoon per gram |
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Answer» Francium is the most expensive element in the world Uranium Uranium |
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| 45770. |
What is sewage |
| Answer» The dirty drain water which contains urine, faeces and other household wastes discharged from houses is called sewage | |
| 45771. |
Tell me 2 Nastic movement |
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Answer» Thigmonasty, Photonasty Two nastic movements are -photonasty and thigmonasty The directionless movements of plants caused due to the external variations in the environment are termed as nastic movements.Various types of nastic movements are:i. Seismonsatic movements: The movement of a plant or its part in response to touch or any kind of shock. Example - the folding or drooping of leaves of ‘touch-me-not’ plant.ii. Nyctinastic movements: The movements of plants that occur in response to the presence or absence of light (photonastic movements) or variation in temperature (thermonastic movements). |
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| 45772. |
Balancing the equation S + HNO3 ---> H2SO4 + NO2+ H2O |
| Answer» The linear system is a = cb = 2c + 2eb = d3b = 4c + 2d + e, which yields the solution (1;6;1;6;2).The balanced equation is therefore S + 6HNO3 --> H2SO4 + 6NO2 + 2H2O. | |
| 45773. |
Important question of science life process |
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Answer» Statethe importance of bile juice in the digestion of fats Explain nutrition in ameoba? |
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| 45774. |
Explain the concentration of metals from its ore in detail ? |
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Answer» For details go to Lakhmir or any other reference which you prefer... Read Ncert .... you Will get it in brief there... |
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| 45775. |
Name 2 constituents of baking powder. |
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Answer» Baking soda and mild edible oil (tartaric acid) Baking Soda and Tartaric acid |
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| 45776. |
how image formed in concave mirror |
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Answer» Image is formed in a concave mirror at different regions of the concave mirror depending on where the object is placed Between pole and focus -virtual and erect Beyond focus -real and inverted Real image |
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| 45777. |
What is the process of reproduction in humans |
| Answer» Refer ur NCERT nd if u want in deep then refer lakhmir | |
| 45778. |
Are all plants give out oxygen during day and carbon dioxide during ? Why or why not? |
| Answer» During day time photosynthesis is carried producing oxygen and Carbon dioxide is produced during day time by respiration is used in photosynthesis. At night time, no photosynthesis occurs and hence no oxygen is produced\xa0oxygen from air diffuses into leaves to carry out respiration and carbon dioxide produced by respiration diffuses out into air...... | |
| 45779. |
What is succus entericus |
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Answer» *Its Ots a intestinal juice secreted by small intestine....... |
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| 45780. |
Physical properties of carbon compounds?? |
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Answer» 1. Non conducter of electricity 2.low melting and boiling point3.soluble in organic compounds 1. Non conductor of electricity Tetravalency and catenation |
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| 45781. |
What is the scientific name of yeast |
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Answer» Saccharomyces cerevisias or sugar eating fungus. Saccharomyces cerevisiae Sacheromysis *would Could anyone plz answer it... |
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| 45782. |
The resistance are double . How many current |
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Answer» We know that ,V=IR. Or I=V/R ,when resistance is doubled then I=V/2R It will also double |
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| 45783. |
How does auxin help in geotropism? |
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Answer» When a growing plant detect light a hormone called auxin stimulate at shoot and root tips of a plant. Thus the plant diffuses towards the shady side . Always auxin accumulate ir settled down in the lower or bottom of the plant and in geotropism( movement due to gravity) shows +ve geotropism .................... Because auxins are present where there is no sunlight and it helps in root growth. |
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| 45784. |
Define Functional Group |
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Answer» The atom which replace hydrogen frm long carbon chain and confer specific properties to that hydrocarbon regardless of length of hydrocarbon An atom or a group of atom that become the activity side of molecule |
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| 45785. |
Define molecular phylogony |
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Answer» The study related to genetics ,evolution and of phylogeny (phylogeny is study of pre existing living organisms and their species relation) It is a science of estimating and analyzing evolutionary relationships.. |
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| 45786. |
What is used in photography name the chemical |
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Answer» Silver chloride n silver bromine....?? Silver bromide (AgCl) is used in black white photography. Silver chloride and silver bromide Silver bromide Silverchloride(AgCl)SilverBromide(AgBr) |
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| 45787. |
Why sky appear blue in color |
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Answer» It actually is not blue in colour but in our eyes it appears to be in blue in colour due to all the gases being present in the atmosphere When sunlight passes through the atmosphere the colours started scaterring as sunlight is a white light constituting 7 colors and all different light have different wavelengths so the shorter wavelength start scaterring first and hence it scattered in all the atmosphere and due to the atmosphere we are able to see colours and hence the sky appears blue to us. Because there are fine and tiny particles |
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| 45788. |
Why pea plant has been taken by mendel for explaining the law of independence? |
| Answer» It is self pollinating plant, its life span is short so the nxt generations can b obtained frequently, it can b grown in small field in large number, it has 7 opposite contrasting characters | |
| 45789. |
What is meant by molecular phylogeny? |
| Answer» Molecular phylogeny is the method which is used to understand the evolutionary history between two organisms of same or different species. Under this method the sequence of DNA, RNA, or proteins can be compared to know the evolutionary distance between the organisms. | |
| 45790. |
important diagram of all chapters |
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Answer» HeartNephronNeuronBrainMale and female reproductive part Electric motor and generator Solar cooker From biology |
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| 45791. |
Hiii guys ..... The chapter metal and non metal is coming in boards exam?? |
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Answer» Afcause Yaa Yes. |
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| 45792. |
What do you mean by "Properties of elements are a function of their atomic mass". |
| Answer» This theory gave by the mandleeves ... Its means that the elements rearrange in periodic table of their atomic mass | |
| 45793. |
Why magnetic field lines do not intersect each other?? |
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Answer» They did not cross each other because if they did means that compass needle would show 2 different directions at the same time which is not possible. If magnetic field lines intersect den there will be 2 North poles which is not possible... This is because at the point of intersection we can draw tangent to the lines of the forces .this would mean two or more then two direction of magnetic field intensity at the same point which is not possible If they do so means they have two directions |
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| 45794. |
What is mean by periodicity? |
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Answer» The repetition of elements having same properties after regular intervals is called periodicity Repetition of properties after a certain interval is called periodicity of properties. If elements are arranged in increasing order of their atomic number in the periodic table, then elements repeat its properties after a definite interval.This repetition of properties is known as periodicity of properties. Repetition of the properties of elements after certain interval is known as periodicity. |
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| 45795. |
Explain the cleaning action of soap with micelle |
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Answer» When a soap is dissolved in water many molecules came together and form a group called micelle because their hydrocarbon chain came together and its polar end is projected outward.When a cloth with a spot of oil is dissolved in soap solution .Soap dissolved tiny oil droplets by the hydrogencarbon chain of the micelle.Due to the outer pull of the water these micelles dissolved in water and clothes get washed away Soaps form micelles in water. The oily dirt from clothes get attached to the centre of micelle. The micelles do not come close to each other and get separated due to ion-ion repulsion. The micelles containing oil dirt thus stay in solution as colloid and are easily rinsed away. When we Jerk In the cleansing action, with the help of micelles formation dirt is removed from the cloth when we pour water and apply soap on the cloth then the micelles formation will take place it\'s hydrophilic end will remain in the water and hydrophobic will attach to the dirt. When we Jersey the cloth then the dirt will come out from the cloth and this is called the cleansing action of soap |
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| 45796. |
What is the cause of such dispersion |
| Answer» Dispersion occurs because the refraction of different colors is different. Light of different colours travel with same speed in vacuum. However they travel with different speeds in a refracting medium.Speed of violet colour is least and that of the red colour is the most.Hence the refractive index of the medium is largest for the violet colour and least for the red colour. As a result the refraction or bending of violet colour is the maximum and that of red colour is minimum. This difference in the extent of bending of different colours of light causes dispersion of white light into its constituent colours as they emerge out of prism. | |
| 45797. |
What is heteroatom and what is its significance?? |
| Answer» Hetero atoms are used in organic chemistry, basically all other atom than carbon and hydrogen are known as hetero atoms. The common hetero atoms which are used in Organic chemistry are, O, N, S, P ,X ( Cl, Br, I etc.)These hetero atoms are very useful in synthetic chemistry as they provide a series of compounds which are essential for the life as, in DNA the Nitrogen bases are used to pair and also in all the amino acids, amide group (-CONH2) is found. | |
| 45798. |
Windmill |
| Answer» It is a type of working engine that is used to harness wind energy. It is a non conventional source of energy and can be renewed easily. It has many advantages as it is non polluting. It doesn\'t produce harmful gasses and can be termed as a clean fuel . it doesn\'t contribute to green house effect. | |
| 45799. |
Can you explain me about Biological magnification |
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Answer» Biological magnification is the phenomena in which certain harmful chemicals enter the organisms and become concentrated at higher tropic level as they travel along the food chain. Farmers use pesticides and fertilisers to protect their crops which are washed in thesoil and water. From soil they are absorbed by the plants along with other nutrition and from water they are absorbed by aquatic plants. Since these substances are non-biodegrable they get accumlated in each progressive level. Human beings acquired top level in any food chain so most substances get accumlated in our body. This is known as Biological Magnification. Biological magnification often refers to the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans. Biological magnification is the increasing concentration of chemicals or toxic substance in an organism. It is a phenomenon in which the pesticides or chemicals given to crops r further transferred to organisms. The organism at higher trophic level will have more concentration of chemical in its body. |
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| 45800. |
What is female reproductive system and all function function with a level diagram? |
| Answer» The female reproductive system in human beings is composed of following parts:Uterus: This is pear-shaped hollow muscular organ. Uterus is the place where the embryo gets implanted and develops into a newborn baby. The wall of the uterus provides safety and nutrition to the growing foetus.Fallopian Tubes: One fallopian tube comes out from each side at the top of the uterus. The fallopian tubes end in finger-like structures; called flimbriae. Fertilization happens in the fallopian tube.Ovary: There are two ovaries; one near each fallopian tube. Ovary produces the eggs or the female gametes. All the eggs are produces by the ovary when the female child is still in the womb. One egg matures in each ovulation cycle and is released from the ovary. The egg is caught by the flimbriae and transferred to the fallopian tube.******: The cervix (mouth of the uterus) opens into the ******. ****** is a muscular tube-like organs; which serves as the passage for the sperms and also as the canal during the child birth. | |