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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.
| 49801. |
Most electro positive element from the periodic table ? |
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Answer» Hii Hello ? You should write answer cesium because frencium is radioactive element so we will not write it as answer Francium Hmm..reason..!! May be but its Lithium (Li) Cesium?? |
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| 49802. |
Cbse class 10 science answer sheet of sa 1 of 2015 - 2016 |
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Answer» Teacher ka help le lo bhai....kaha answer sheet dhund rahe ho......... It is available on Google |
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| 49803. |
Experiment carbon dioxide necessary for photosynthesis |
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Answer» Take two healthy potted plants which are nearly the same size. Keep them in a dark room for three days. Now place each plant on separate glass plates. Place a watch-glass containing potassium hydroxide by the side of one of the plants. The potassium hydroxide is used to absorb carbon dioxide. Cover both plants with separate bell-jars. Use vaseline to seal the bottom of the jars to the glass plates so that the set-up is air-tight. Keep the plants in sunlight for about two hours. Pluck a leaf from each plant. Remove the green coloured chlorophyll from the leaves by boiling them in alcohol. Wash the decolourised leaves with water and then pour iodine solution over them. Observe the change in colour of the leaves.We will find that the leaf from the plant (which was inside the bell jar containing potassium hydroxide which absorbed the carbon dioxide), does not turn blue-black on adding iodine solution showing that no starch is present. So we can conclude that the photosynthesis cannot be carried out without carbon dioxide.The leaf from the plant (which was inside the other bell jar without potassium hydroxide and so having carbon dioxide in it) turns blue-black on adding iodine solution showing that starch is present in this leaf. From this observation we conclude that photosynthesis (to make starch) takes place in the presence of carbon dioxide.So this shows that carbon dioxide is necessary for the process of photosynthesis to take place. Co2 is necessary for photosynthesis because it reduces to form glucose Co2 provide carbon to plant that allow the plant to produce glucose. |
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| 49804. |
Editing text |
| Answer» Ask bro.... | |
| 49805. |
State Mendels 3 law |
| Answer» The three laws given by Mendel are:i. Law of dominance - According to this law, when a cross is made between two homozygous individuals, only one of the two characters of the pair (dominant) appears in the F1 generation. There is the appearance of both the characters in F2 generation.ii. Law of segregation - This law states that the characteristics of an organism are determined by the internal factors which occur in pairs. Only one of a pair of such factors can be present in a single gamete.iii. Law of independent assortment - This law states that in the inheritance of more than one pair of traits in a cross simultaneously, the factors responsible for each pair of traits are distributed independently to the gametes. | |
| 49806. |
State mendels 1 and 2 law of inheritance |
| Answer» i. Law of dominance - According to this law, when a cross is made between two homozygous individuals, only one of the two characters of the pair (dominant) appears in the F1 generation. There is the appearance of both the characters in F2 generation.ii. Law of segregation - This law states that the characteristics of an organism are determined by the internal factors which occur in pairs. Only one of a pair of such factors can be present in a single gamete.iii. Law of independent assortment - This law states that in the inheritance of more than one pair of traits in a cross simultaneously, the factors responsible for each pair of traits are distributed independently to the gametes. | |
| 49807. |
How the traits can be inherited |
| Answer» Inherited traits\tTraits controlled by genes\tPassed on from one generation to the nextNatural hair colour, shape of the ear lobe, eye colour and feet shape are examples of Inherited traits | |
| 49808. |
Why is the number of sperms is always more than no of eggs present in females?? |
| Answer» Because not all the sperm gets to the egg(s). To ensure each egg will be ferrtilized there needs to be more sperm then egg(s). And sperms are motile and they have to compete with one another for their existence. In the end only one sperm fuses with the ova . | |
| 49809. |
Anybody tell how to study of science |
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Answer» Take any textbook and read it line to line and then solve latest sample papers. If any question in the sample paper is of a topic which you have not read, search for the topic and read carefully and you are ready to go dear. By reading ncert line by line and understanding it\'s meaning |
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| 49810. |
Why respiration and decomposition processes are considered to be an exothermic processes ? |
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Answer» Because energy is released during these processes... |
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| 49811. |
Function of human heart |
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Answer» To tranfer the blood in the whole body \tIt is a four chambered structure consisting - the right auricle , the left auricle , right ventricle and left ventricle.\tThe Auricles are smaller and placed above the ventricles. Auricles are partitioned by a muscular called septum.\tThe right auricle receives the deoxygenated blood from all parts of the body except the lungs. It pumps this blood into the right ventricle. Then , the right ventricle pumps the deoxygenated blood to the lungs. The left auricle receives oxygenated blood from the lungs through pulmonary veins. It pumps this blood into the left ventricle. The left ventricle pumps the oxygenated blood to the distant organs in the body.\tEach auricle communicates with the ventricle of its side by a pore which is guarded by valves. These valves allow the blood to flow from the auricles to the ventricles but check its return to the auricles. Thus , the heart there is a complete separation of oxygenated and deoxygenated blood. The heart is enclosed in a double membrane called pericardium. It contains fluid which protects the heart from any shock or mechanical injury.\tThe heart collects blood through both the auricles and then distributes it through ventricles. The action of heart includes contraction and relaxation of the auricles and ventricles.\tA contraction of heart is called systole and diastole. The contraction and relaxation occur in an automatic rhythmic fashion. The auricles and ventricles contract alternately. The rhythmic contraction and relaxation of heart is called a heart beat. The function of human heart is to pump blood throughout the body... |
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| 49812. |
What is desperation |
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Answer» That is dispersion not desperation The process of spilitting of white light into its 7 constituent colours is called dispersion of light... |
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| 49813. |
Why is important reproduction for human |
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Answer» For continuing the species on Earth Reproduction ensures continuity of life on earth ex human beings reproduce to give birth to new human and then this process goes on so human can life on this earth |
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| 49814. |
What is Iupac name of acetic acid |
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Answer» Ch3cooh Ethanoic acid. Ch3cooh CH3COOH Second question is mine plzz send me i want that answer emerhency plzzzz Send answer for my question plzz Ehanoic acid |
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| 49815. |
Mono hybrid cross |
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Answer» Monohybrid Cross:\xa0The cross in which just two contrasting characters are studied is called monohybrid cross. Mendel did monohybrid cross for his first experiment. He selected a pair of contrasting characters for that experiment. It is a cross between parents differing in only one trait or in which only one trait is being considered. I had send one question plzzz send me answer for that.... Wt? |
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| 49816. |
Which book perfer to Board Exam For class 10th children |
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Answer» Selfstudy is more important than buying any book Exam idea for science is best S chand for science, golden for english, ncert for sst, rd sharma for mathematics, and at last solbe oswal sample paper S chand is good for science Plz reply to my Question RD Sharma is best for Maths and Arihant for Social Science |
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| 49817. |
Latest sample questions paper |
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| 49818. |
How do acids and bases reacts with each other? |
| Answer» Acid +base gives salt+water | |
| 49819. |
Why respiration is an exothermic process? |
| Answer» An exothermic reaction is a reaction in which energy is liberated out.Respiration is considered as exothermic reaction because energy is released in this process.Glucose combines with oxygen present in our cells to form carbon dioxide and water along with energy.C₆H₁₂O₆ + 6O₂ ----> 6CO₂ + 6H₂O + energy | |
| 49820. |
What are formulas of compounds |
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| 49821. |
What is cyst? briefly? |
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Answer» Cyst is a layer on spores When spores are fall down then this layer protect to absorb the moisture The outer layer of the plamodium is know that cyst |
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| 49822. |
Which pole of a solenoid has been shown in the adjoining figure? |
| Answer» North | |
| 49823. |
The length of wire is doubled. By what factor does the resistance change? |
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Answer» Resistance also become double........ R is directly proportion to l The resistance is directly proportional to the length of wire. So, when the length of wire is doubled, then the resistance also gets doubled. |
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| 49824. |
Explain the nature of covalant bond using the bond formation in CH3Cl ? |
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Answer» Single covalent bond..... Single covalent bond Carbon has four electron in its outermost shell and needs to gain or loss four electrons to attain noble gas configuration. To overcome this, carbon shares each of the four electrons with each of the three hydrogen atoms and one chloride atom. The bond that are formed by sharing electrons are known as covalent bond. |
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| 49825. |
What are the contons under which we can convert a alcohol into carboxylic acid |
| Answer» By- alk. Kmno4 | |
| 49826. |
Why carbon and carbon do not make four bond between them |
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Answer» Carbon and carbon can make 4 covalent bonds between them. Carbon can have 680 other cabon atoms attatched to it. Because carbon has valency of 4 and its difficult to gain or loose 4 electron so he forms bond but with each other they can\'t make 4 bond between them as they requires HYDROCARBON OR A FUNCTIONAL GROUP TO FORM COMPOUNDS |
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| 49827. |
What is illustration |
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| 49828. |
I have a problem "i can\'t memorize the ion\'s chargers" any tips which help"s me out...?? |
| Answer» | |
| 49829. |
Explain the mechanism of cleaning action of soap |
| Answer» The dirt present on cloths is organic and insoluble in water. Therefore it cannot be removed by only washing with water when shops are dissolved in water their hydrophobic end attach themselves to the dirt and remove it from the cloth. Then the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of cluster. These micelles remain suspended in water. Hence the dust particles are easily rinsed away the water. | |
| 49830. |
Why the object is placed in only the principle axis |
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| 49831. |
C chemical reaction of citric acid and potassium permanganate |
| Answer» Colour yellow | |
| 49832. |
Whicj is the highest and lowest metal ,non-metal and metalloid |
| Answer» | |
| 49833. |
What is corpus callosum |
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Answer» It is the largest bundle of nerve fibers that connects the left and right cerebral hemispberes The largest bundle of nerve fibers that connects the left and right cerebral hemispheres.......... It is the largest bundle of nerve fibers that connects the left and right cerebral hemispheres. |
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| 49834. |
What is the direction of conventional current |
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Answer» Positive to negative....... From positive to negative terminal of cell or battery? From positive to negative terminal of a cell... |
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| 49835. |
Marks distribution of science |
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| 49836. |
What are rhe Function of nephron |
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Answer» It is a functional and structural unit of kidney it filters the blood in order to remove the nitrogenous and metabollic waste from our body Nephron is a structural and functional unit of kidney.it filters the blood in order to remove nitrogenous metabolic waste .they also absorb some useful substances such as glucose,amino acid ,minerals and major amount of filterate Nephron help in filtering nitrgenous waste from the blood. |
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| 49837. |
What are plant harmones? Give an example |
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Answer» They are chemical substance which help to grow plants. They are also called phytohormones. Eg. Auxin, ......as mentioned above The function of control and coordination in plants is performed by the chemical substance called plant hormones. For example - Auxins, Gibberellins, Cytokinins and Abscisic acid. Plant harmone are those harmones which coordinate their behaviour with response to the stimulus.They normally respond by growing a part of the plant.Example gibberlin,auxin,cytokinins,absisic acid |
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| 49838. |
Why does stars twinkling |
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Answer» Due to atmospheric refraction... Stars do not really twinkle, they just appear to twinkle when seen from the surface of Earth. The stars twinkle in the night sky because of the effects of our atmosphere. When starlight enters our atmosphere it is affected by winds in the atmosphere and by areas with different temperatures and densities. This causes the light from the star to twinkle when seen from the ground due to atmospheric refraction. Due to atmospheric refraction Due to refraction of light Due to refraction of light through different layers like lithosphere, atmosphere,stratosphere,etc. |
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| 49839. |
Which alkaline earth element is radioactive in nature? |
| Answer» Francium is a earth metal which is highly radioactive; its longest-lived isotope 223Fr has a half-life of only 21 minutes. | |
| 49840. |
Other name of plaster and paris with advantages |
| Answer» Plaster of Paris is prepared by heating gypsum at 373 K. On heating, it loses water molecules and becomes calcium sulphate hemihydrate (CaSO4.1/2 H2O) which is called Plaster of Paris.Plaster of Paris was first widely used in Paris, and it became the center of plaster production. Thus it got its name.9000 years ago houses are made of woods, in order to protect them from fire, a coating of plaster was made on the walls.First, this application of POP was started\xa0in Paris\xa0and it became the center\xa0of plaster production, thus it is known as Plaster of Paris. | |
| 49841. |
No particles can ever move at speed greater than that of light in vaccum.true or false? |
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Answer» True..... True.. |
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| 49842. |
Define heteroatom. |
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Answer» Hello abhinav,aadaya and bestie AND BYE...My class time.... Hi Hii frnds Where is Shreya ?? Hii aadya and abhinav bro ?? Thanku..? Usne nhi bola to maine hi bol diya....?? Ooo...?? My pleasure from her side....?? Thanku...?? A heteroatom is any atom which is not a carbon or hydrogen atom. Example: nitrogen, oxygen etc. |
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| 49843. |
What is the formula for corrosion with copper, iron and silver? |
| Answer» When copper or silver combines with oxygen, the process is known as corrosion or oxidation.\xa0When copper reacts with oxygen, then it produces copper oxide. The chemical equation of this reaction is4Cu + O2 → 2Cu2O, and forms Copper Oxide.Silver objects corrode slowly in the air due to the presence of H2S in the air. The chemical equation of this reaction is 2Ag + O2 → Ag2O.\xa0 | |
| 49844. |
How geothermal energy is reneawable of energy???? |
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Answer» Geothermal energy is a renewable resources because it is produced by the heat of the earth and can be easily renewed Geothermal energy is basically produce from the earth. Temperature below the earth surface is very large compare to other places, It can be happen due to other reason. This heat from earth mantle can be use to produce heat.Cold water is sent through pipes in the heated area of earth mantle and the water gets heated up due to high temperature. Steam produced from this procedure can be use to rotate turbine which can produce electricity. |
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| 49845. |
Whar is synapse |
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Answer» the gap btw 2 neurons Synapse is a little gap between the two consecutive neurons. In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another cell (neural or otherwise). The synapse contains a small gap separating neurons Synapse is a microscopic gap between the pair of two adjacent neuron where the information pass. The gap between two neurons. |
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| 49846. |
CBSE sample paper website |
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Answer» cbse.nic.in Cbse.nic.in |
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| 49847. |
Define: fermentation |
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Answer» It\'s not a fermentation it is fragmentation Am i right because I am not sure Fermentation is the process in which a substance breaks down into a simpler substance. It is a proceed in which simple multicellular organism break down into small pieces on maturing and form a complete organism. |
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| 49848. |
What is the role of H2SO4 in esterification reaction |
| Answer» H2so4 act as a catalyst and dehydrating agent in esterification. | |
| 49849. |
What is catalyst?in brief please? |
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Answer» Catalyst is the substance doesn\'t participate any reaction but increase and decrease the rate of reaction. A substance that makes a chemical rxn happen faster. Catlyst is the substance not participating any rxn but increase the rate of rxn catalyst-A substance that increase the rate of chemical reaction without causing any chemical change ex maganese cobalt nickel the substance in whose presence the rate of chemical reactions but in the reaction without causing any chemical change to it is called catalyst ex cobalt nickel Name two industries based on forest produce |
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| 49850. |
What is nomenclature ????? |
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Answer» A standard and widely accepted system of naming plants and animals is the binomial nomenclature. It involves the naming an organism with the help of two\xa0names, the genus name, and the specific name. the naming of anything |
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