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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.
| 38051. |
Why planets do not twinkle while stars twinkle plzz gave me answer in simple words |
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Answer» Planet are much closer to the earth and are seen as extended sources. And the stars twinkle, due to the refraction of light. Because planets do not have their own light Because planets are near to earth than stars so, there are many point source of light. Therefore when light falling on planets is less other source of light provides it light . Therefore planets don\'t twinkle at all. While due to atmospheric refraction and presence of single point source of light stars twinkle. |
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| 38052. |
How Ethanoic acid is formed |
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Answer» When ethanol is reacted with H2O in presence of H2SO4 When ethanol reacts with nascent oxygen in the presence ok kmno4 |
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| 38053. |
Why sky appears blue? |
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| 38054. |
Why Diamond is good conductor of heat and electricity. |
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Answer» It\'s a good conductor of heat \'cause it has tightly and closely packed atoms which can easily pass heat from ine atom to other. No diamond is not good conductor of electricity because their is not free electron in diamond |
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| 38055. |
Difference between Reflection & Refraction |
| Answer» Reflection is the bouncing back of light when it strikes a smooth surface. Refraction is the bending of light rays when it travels from one medium to another. Generally occurs on shinny surfaces that only allow rebounding of light without permitting penetration through it. | |
| 38056. |
Formula of ester |
| Answer» Hii | |
| 38057. |
What is the difference between plane convex lens and concave convex lens |
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| 38058. |
All races of man have same blood group. Why?? |
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Answer» \u200bBlood group differs from one individual to another. Two or more people in a race can have same blood group, but not all. Determination of human blood group:Human blood group is controlled by alleles. It is determined by the presence or absence of specific antigens and antibodies in the blood. There are four types of blood groups – A, B, AB and O containing either of the two antigens (A and B) and two antibodies (a and b). Given chart may express the presents and absence of antigens and antibodies more clearly. No, not all races of man have same blood group. Two or more people in a race can have same blood group, but not all.Human blood group is controlled by alleles. It is determined by the presence or absence of specific antigens and antibodies in the blood. There are four types of blood groups – A, B, AB and O containing either of the two antigens (A and B) and two antibodies (a and b). Given chart may express the presents and absence of antigens and antibodies more clearly. |
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| 38059. |
What are the methods in which sexually transmitted diseases can be controlled? |
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| 38060. |
What is the general formula of homologous series of alcohol? |
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Answer» each alcohol group differ by CH2 CnH2n+1-OH Name of Serie General chemical formula\tAlkanes CnH2n+2\tAlkenes CnH2n\tAlkynes CnH2n-2\t1-bromoalkanes\t(e.g. of Haloalkanes) CnH2n+1Br\t1-alcohols\t(e.g. of Alcohols) CnH2n+1OH = CnH2n+2O\tAldehydes CnH2nO\tCarboxylic Acids CnH2nO2\tAcid Chlorides CnH2n-1OCl\tAmines CnH2n+1NH2 = CnH2n+3N\tAmides CnH2n-1ONH2 = CnH2n+1ON\tNitriles CnH2n-3Nwhere n represents the number of carbon atoms in the chain. Note that in some cases the minimum value of the number of carbons in the chain (n) is greater than 1 (n>1).For example, ethene (2 carbons) is the smallest alkene and ethanenitrile (2 carbons) is the smallest nitrile. CH2 |
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| 38061. |
What is refracyion |
| Answer» Refraction is the change in direction of wave propagation due to a change in its transmission medium. The phenomenon is explained by the conservation of energy and the conservation of momentum. | |
| 38062. |
Which is the most reactive metal |
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Answer» pottasium (k) Lithium Sodium (Na) |
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| 38063. |
How we can manufacture of ethanol |
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| 38064. |
Name the compound that are exist after burning and also give their effect on environment. |
| Answer» Carbon monoxide gas wich is very harmful | |
| 38065. |
What is chemical reaction take place |
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| 38066. |
Was miller and Urey experiment disapproved later due to theory of biogenesis |
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| 38067. |
What are isomers |
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Answer» By the thats not kholi thats khol liya kr Same molecular formula but different structural formula... |
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| 38068. |
Which book should I buy to get good marks in science? |
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Answer» Meri sister NCERT sabse achi books hoti hai S.chand NCERT also Xam idea -(its the best!!) |
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| 38069. |
What js magnetism |
| Answer» A physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects. | |
| 38070. |
Which are the New elements that are discovered recently |
| Answer» Nihonium and symbol NhMoscovium and symbol McTennessine and symbol TsOganesson and symbol Og. | |
| 38071. |
What do we mean by characteristic |
| Answer» Traits are known as | |
| 38072. |
What is quantam theory and photon. |
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| 38073. |
A woman has only daughters, explain the situation genetically |
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Answer» This means every time sperm containing X chromosome is fertilized with her during mating. The *** of the child is determined at the time of fertilization when male and female gametes fuse to form zygote. The male individual contains one X chromosome and one Y chromosome (XY) and the female individual contains two X chromosomes (XX). Genetically we can prove female have two X chromosomes.If a sperm carrying X chromosome fertilizes an egg then the offspring will be a female child. This is because the offspring will have XX combination of *** chromosomes. If a sperm carrying Y chromosome fertilizes an egg then the offspring will be a male child. This is because the offspring will have XY combination of *** chromosomes. You will find that the *** of the child is determined by the type of sperm that fuses with the ovum at the time of fertilization.Male produces two different kinds of gametes. Half of the gametes having X chromosomes and other half of the gametes having Y chromosomes. Therefore males are heterogametic. Female therefore produces same type of all gametes. So, females are homogametic.If a woman has only daughters, we can understand that every time the male X chromosome only fused with the female X chromosome. And all the offspring with XX combination of *** chromosomes became her daughters. |
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| 38074. |
What are the applications of joules law of heating in our day to day life...?? |
| Answer» 1.working of fuse in our domestic wiring2.filament type electric bulb3.electrical heating appliances like toasters,iron ,water heaters e.t.c | |
| 38075. |
What we used to protect to pragnacy |
| Answer» there are many ways to avoid pregnancy by berier method .conteractipill .surgical method etc | |
| 38076. |
Why heart is called double circulation |
| Answer» Because at first it shows pulmonary circulation and then systemic circulation simultaneously | |
| 38077. |
An element \'X\' belongs to second group of the periodic table. Write the formula of its oxide. |
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Answer» It is xo X2o |
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| 38078. |
Why oil does not dissolved in water? |
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Answer» Thnx tell me what is the means of polar Because water is polar and oil is nonpolar, their molecules are not attracted to each other. The molecules of a polar solvent like water are attracted to other polar molecules, such as those of sugar. In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonp olar solutes.The oil floats because it is lighter than water. When the oil and water are mixed together, the oil will form little balls throughout the solution of water before it floats back to the top. |
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| 38079. |
Diff between alkane alkene and alkyne |
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Answer» In Alkane have single bond and they are saturated hydrocarbon . Alkene have doble bond and unsaturated hydrocarbon . Alkyne have triple bond and they are unsaturated hydrocarbon............???? Alkane have single bond .alkene have double bond nd alkyne have triple bond |
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| 38080. |
What is induced current ?? Different ways to induce currrnt |
| Answer» current induced in a coil due to relative motion of coil and magnet is called induced current.different ways to induce current are:1)relative motion of coil and magnet2)relation motion of two coils of which one behave as electromagnet3)by taking two coil of which one is connected to battery and changing its current or removing.cell from battery current is induced in another coil. | |
| 38081. |
What is the molecular formulae of C6H2O2 |
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Answer» Hex-2,4 diyn-1,6dialStructure :-OHC-C=-C-C=-C-CHO"=-"=tripal bond C6H11COOH |
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| 38082. |
What r chawls? |
| Answer» Crawls are multistructured buildings that contains many one room tenements and one single toilet for entire chawl it usually have poor hygiene and lack sanitation | |
| 38083. |
Why does h2 gas is not produce when metals react with HNO3? |
| Answer» Bcoz nitrogen compound so formed is a strong oxidizing agent and react rapidly to form H2O | |
| 38084. |
What will formed when metal + acid?? |
| Answer» Metal salt and hydrogen gas | |
| 38085. |
How to create a human body |
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| 38086. |
Which of the following fuse should be used for an electric iron of 1 kW\xa0when operated at 220 V? |
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| 38087. |
Name the organism widely used In baking industty |
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Answer» Yeast Yeast.. |
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| 38088. |
Write the method of reproduction about the particular organism |
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| 38089. |
What is the difference between pepsin and muscus |
| Answer» Pepsin digest the protein and mucus protect the stomach from its own secretion of hcl | |
| 38090. |
Chemical equation of copper reacting with carbon dioxide to form coppercarbonate |
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| 38091. |
What is analogs organ? |
| Answer» Organs having same basic structure but diff. function........ | |
| 38092. |
State the importance of chromosonal difference between sparm and eggs of humand |
| Answer» It results in the gender formation of child. | |
| 38093. |
Ways to stop ozone deplation? |
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Answer» Decreasing air pollution By not using things which cause pollutions like poly bags, vehicles, refrigerator , By less use of vehicle because it produces lot of carbon gases Preventing of global warming |
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| 38094. |
What is meant by counducter and insulater |
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Answer» In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. Conductor, which allows electric current to pass through it. Insulator, which does not allow electric current to pass through it... |
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| 38095. |
what type of nutrition occurs in fungi? |
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Answer» saprotrophic nutrition Saprotrophic nutrition |
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| 38096. |
What is meaning of traits. |
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Answer» Characters Quality or characteristics Character |
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| 38097. |
Give chemical eq to show the change that occur when green colures feso4 are heated |
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| 38098. |
Limitations of newland law of octaves?? |
| Answer» Limitations are it only for 60 not more than elemant can be suit in this law and there is no place for isotopes elements | |
| 38099. |
Define electromagnetic save? |
| Answer» Electromagnetic wave are wave which don\'t need any medium like solid ,liquid, and gases | |
| 38100. |
Which type of reaction take place in polymerisation |
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