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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.
| 55551. |
What happens when ZnCo3 is heated in the absence of air ? Give the relevant equation? |
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Answer» Wen ZnCo3 is heated in the absence of ocygen it will two products i.e ZnO+Co2 ZnCo3 _ heated _ZnO + CO2 |
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| 55552. |
What is role of reproduction to stable a population of country? |
| Answer» If the reproduction is controlled then there would incease in deaths and decrease in birth resulting which population will not risenat a rapid speed | |
| 55553. |
Chapter 9 Is easy or not |
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Answer» Thank you varun you suggest me Very easy if you study and very hard if you not study and read.I hope my ans is help you.Dr.rachi sharma Prof. |
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| 55554. |
Describe double fertilization in plants. |
| Answer» Double fertilization : It occurs when one male nucleus fertilizes (fuses) with egg cell to form zygote cell and other male nucleus fuses (fertilizes) with two polar nuclei to cause triple fusion. As these two types of fertilizations take place at the same time in the ovule of the plant, it is known as double fertilization.After fertilization:(i) Ovary develops into fruit.(ii) Ovules develop into seeds. | |
| 55555. |
How we learn heridity and evolution |
| Answer» 200 | |
| 55556. |
What is the role of seminal vesicles and prostate galnd |
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Answer» These glands also provide fluidity to the sperms Provide nutrient to sperm Both the glands provide nutrition to sperms ... |
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| 55557. |
What is the principle of reversibility of light |
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| 55558. |
Which lens is used to correct presbyopia? |
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Answer» Both concave n convex lens Both concave and convex lenses Bifocal lens...Its upper part consist of concave lens and lower part consists of convex lens Bifocal lens |
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| 55559. |
What are the types of reaction |
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Answer» 1.combimation 2.dissociation 3.oxidation 4.reduction 5.redox 6.photolytic 7.hydrolysis 8.electrolysis 9.thermal decomposition 10.neutralisation 11.displacement 12.double displacement 13.substitution 1) combination2) decomposition3) displacement4) double displacement5) oxidation6) reduction CombinationDecompositionDisplacementDouble displacementOxidation and reduction Physical and chemical |
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| 55560. |
how to use ncert |
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Answer» So much deficult to us???? Just remember,in ncert there is only one answer but different questions so you have to under stand the question and mug upthe answer Just tead it Just mug it up Read line by line each chapter atleast thrice What ??? Sorry I cannot understand yr question ?? |
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| 55561. |
Difference between heredity and evolution?? ?????? |
| Answer» In very short,\xa0Heredity\xa0is the transfer of characteristics from the parent to its offspring without any modifications.\xa0Evolution\xa0is the modification of characteristics. In very short,\xa0Heredity\xa0is the transfer of characteristics from the parent to its offspring without any modifications. | |
| 55562. |
Only domestic circuit all details |
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| 55563. |
Why saturated carbon compound are less reactivevthan unsaturated carbon compound |
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Answer» Bonds are of 2 types π and sigma .π bonds are weaker as there is no electron belt between thecombining nucleus thus repulsion acts ,unlike sigma bond where electron cloud is present b/w nuclei thus attracting each other . Saturated hydrocarbon has sigma bonds whereas unSaturated hydrocarbons has π and sigma bonds .all atoms want to attain stability ,so unSaturated hydrocarbons breaks their π bonds to form sigma bonds and attain stability...? Because in saturated carbons thier is only single carbon bond whereas in unsaturated carbon compounds thier are multiple bonds present between carbon carbom atom Because unsaturated carbon compounds consist of weak bond and saturated of sigma bond |
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| 55564. |
What is an olfactory indicator? Name two such indicator |
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Answer» Some substances whose odour changes in acidic or basic media. These are called olfactory indicator. Examples vanilla, onion and clove. Olfactory A indecator by whose smell we can identify substance acid or base called as olfacrory indecator Ex.vanilla,clove oil The indicator which sense of smell. Examples are nose ? |
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| 55565. |
What is the basic difference between regeneration and fragmentation? |
| Answer» In fragmentation Breaks up into 2 or more small pieces.In regeneration. Broken parts of the organism groe into separate individual. | |
| 55566. |
Why are magnetic field lines closed curves |
| Answer» Magnetic field lines are closed curves as a magnet always exists as dipole i.e S or N cannot exist independently so closed continuous curve... | |
| 55567. |
Explain fertilization in flowers |
| Answer» First pollan grains falls from anther to stigma or by the agents then from stigma by pollentube it goes into overy there it becomes seed and from there it goes into ovule | |
| 55568. |
Give. Me. Process. Of. Ac. And. Dc. Generator. In. Short. Pleez???? |
| Answer» Refer to ncert for this | |
| 55569. |
Describe homologous series |
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Answer» The series formed by functional groups with gradiation of mass of 14u and formula of CH2 unit with same general formula is called having mass difference 14 gm Series having same general formula Series having diffrence of CH2 group of atoms |
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| 55570. |
What is difference between ketone and aldhyede suffix |
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Answer» Ketone is functional group formed when one O atom displaces two hydrogen atom. While aldehyde is formed when one oxygen atom with one H atom combinly displaces three H atom. Thus ketone formula is -C=O while aldehyde formula is -C=O \'H Ketone is ●CO● and aldehyde is ◆CHO◆ Ketone is also a fuctional group whose formula is co and it loses 2 hydrogen and it makes double bond eg. C3H8 is the formula of propane but C3H6CO IS THE formula of propone. Aldehyde is fuctional group whose formula is CHO or O it makes only one bond. |
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| 55571. |
What. Is. The. Position. Of. Hydrogen. Element |
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Answer» Position of hydrogen in modern periodic table is made separately at the top 1st group 1st Period Nobody knows about |
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| 55572. |
Why carbon for many compound |
| Answer» Carbon have many compund because it is a teravalent tetra means 4 valent means valency and they form covlent bond by sharing of electron | |
| 55573. |
Identify the functional group HCOOH |
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Answer» Functional group name Carboxylic acid COOH Carboxylic acid COOH Carboxylic |
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| 55574. |
Differentiate between ethanol and ethynic group ? |
| Answer» \tEthanolEthanoic acidThe functional group in ethanol is -OH alcohol.And functional group in ethanoic acid is –COOH carboxylic acidIt has sweet odour.It has pungent odour.It does not react with Sodium bicarbonate (NaHCO₃)It reacts with Sodium bicarbonate (NaHCO₃) releasing CO2 gas.It does not change the colour of blue litmus paper..It can change the colour of blue litmus to red.\t | |
| 55575. |
How, when and why human being reoroduce? |
| Answer» To continue their generation | |
| 55576. |
What is chlor alkali process in chemistry |
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Answer» When NaCl and water react with each other to form NaOH ,Hydrogen and Chlorine gas .Or we a can say the process in which chlorine gas is formed When Nacl and water (BRINE) decomposes to form chloride , NaOH ,and H2(HYDROGEN GAS) the process. Is called chlor alkali process. |
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| 55577. |
Iodohexane ka EDS |
| Answer» CH3---CH2---CH2--CH2---CH2---CH3---i you can put two dots in place of every single bon and also make two dots for each hydrogen with its carbon | |
| 55578. |
What is the full form of std? |
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Answer» Subscriber Trunk Dialing STD-Sexually transmitted disease Sexually transmitting disease |
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| 55579. |
How are variation mutations important for organism? |
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| 55580. |
Why we use condom to prevent aids |
| Answer» Because condom help to prevent meet the sperm and ova to fertilizes them | |
| 55581. |
One question moreHow can I make govt. Web designer? Explain briefly |
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| 55582. |
What is fat synthasis |
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| 55583. |
Any friend have mock test of class 10 ,2018-2019.please shar |
| Answer» No yarr i have not | |
| 55584. |
Among first 20 elements of modern periodic table, which are the noble gases????? |
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Answer» All the elements of the 18th group are noble gases Helium, neon, argon . Helium , Neon ,Argon |
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| 55585. |
Explain the working of an electric generator |
| Answer» The electic generator is produce energy with the help of armature | |
| 55586. |
electron dot structure of ethyne |
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Answer» CH triple bond CH Go to google or you tube |
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| 55587. |
Define chemical equations |
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Answer» The representation of a chemical reaction in the form of eq using symbols for reactant and product is known as chemical reaction Don\'t know The representation of a chemical reaction in the form of equation using symbols specidlfied for each reactants and products is called a chemical equation |
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| 55588. |
What can you an individual do to reduce your consumption of the various natural resources |
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| 55589. |
How could the Modern Periodic table remove various anomalies of Mendeleev\'s periodic table? |
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| 55590. |
Name a phenomena on which the work of lens is based |
| Answer» Work of lens is based on refraction of light | |
| 55591. |
Spirogyra reproduce by process of fragmention but why don\'t we |
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Answer» Bcz we humans have special orgams, tissue for reproduction.....nd in spirogyra all the cells have reproducing capability In complex multicellular organisms like humans, specialised cells make up tissues, tissues make up organs, organs make up organ system and finally various organ systems make an organism. Since complex organisms / humans have a high degree of organisation in their body, they can\'t be reproduced from their cut body parts or fragments by the process of regeneration and fragmentation...But just think about that! If your fingers were cut and they become your clone, how would you feel!! Moreover, overpopulation is one more factor. Because we are humam beings we reproduced by sexual reproduction not by fragmention. |
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| 55592. |
Middle reactive element react with water or not give region |
| Answer» Yes middle reactive elements react with water because they are more reactive than hydrogen present in water and their forms oxides on reacting in special conditions | |
| 55593. |
Show an activity :to check pH of tap water and compare it with pH of water in the water body |
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| 55594. |
Both overproduction and underproduction of growth hormone leads to disorder in the body. Explain. |
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Answer» Overproduction causes extreme tallness or giantism and underproduction causes shortness or dwarfness or dwarfism???? Under production causes dwarfism and Overproduction causes giantism |
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| 55595. |
why do we able to smell of an agarbatti? |
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Answer» Because the particles or smell of agarbatti fuses with the particles present in air and travels with air and that\'s the reason that we can smell it from a distance... Defusion of air. |
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| 55596. |
What is placenta ?? And it\'s function |
| Answer» placenta is temporary connection between mother and its foetus. its function is to help in the exchange of nutrients and wastes. | |
| 55597. |
What is SNELL\'S law..??? |
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Answer» Sin I /Sin r = constant Sin i / sin r = 1 So when we cross multiply , then sin i = sin r Wrong. Raunak pandey it is sin i / sin r Basically this law is base on refraction 2law sini/sinr Sini/sinr Second law of refraction Sin i = sin r |
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| 55598. |
Why leaves become yellow in absence of light |
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Answer» 1- in absence of light photosynthesis doesn\'t occur2-plant might be loosing it\'s waste products no photosynthesis take place in absence of light. Pta nhi ? |
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| 55599. |
Where is heart located |
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Answer» Middle of thorax cavity Left side of the chest Left side in our body. Left side |
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| 55600. |
What happens when sodium metal reacts with is dropped in a testtube contains ethanol |
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Answer» C2H5OH+Na=C2H5ONa+H2 Hydrogen gas would be evolved as C2H5OH+Na=C2H5ONa+H2 |
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