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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.
| 54901. |
What is the solution called with equal amount of acid and water |
| Answer» Diluted solution | |
| 54902. |
What is function of carbon brish |
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Answer» It function is to pass current in wire of other resistance Circle Its function is to change the direction of current for the continous movement of armature |
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| 54903. |
Explain the three law of mendel\'s |
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Answer» Aur 3sra .law of dominance Law of segration( result ratio 3:1) Law of independent assortment (result ratio 9:3:3:1) |
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| 54904. |
How iffspring came out in human reproduction |
| Answer» | |
| 54905. |
How is urine produced ? |
| Answer» Urine is produced by our nitrogenous waste an d it also contains waste diluted material excreted by body and it is filtered by nephrons present in kudney | |
| 54906. |
Does someone tell me about format of science project file please |
| Answer» | |
| 54907. |
What is gain of electron called? |
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Answer» Anion It is called reduction. The gain of electron is called ions |
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| 54908. |
What is PNG ??? |
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Answer» Portable network graphics is a raster grapics file format that supports loseless data compression . Portable network graphics |
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| 54909. |
Name the chemical tests to detect the presence of ethanol,ethanoic acid, |
| Answer» For presence of ethanol add sodium to it then the gas liberated is hydrogen which burns with a pop soundFor ethanoic acid add sodium carbonate to it the gas liberated is carbon dioxide which turns lime water milky. | |
| 54910. |
Weightage of heredity and evolution |
| Answer» 1. Overproduction of agricultural goods.2. Shortage of loans. | |
| 54911. |
What is fermentation process ? |
| Answer» It converts sugar substrates into alcohol and carbon dioxide. Fermentation process also releases certain amount of energy. Fermentation is the process which involves chemical changes in the organic substrate brought about by microbial enzymes.\xa0 | |
| 54912. |
How mitosis and meiosis takes place during sexual reproduction? |
| Answer» Meiosis take place during gametes formation and mitosis take place after fertilisation | |
| 54913. |
Is h2o dissolbed in water |
| Answer» H2o is the molecular formula of water then how it can be dissolved..it cannot v dissolved. | |
| 54914. |
How heredity be understand |
| Answer» By mendels law | |
| 54915. |
Is h2o is produced during the reaction of c + o2 ? |
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Answer» It is not possible No it is not possible Impossible No |
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| 54916. |
Define tropism?and types |
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Answer» The directional movement of plant in response to external stimulus in which the direction of stumuli is determined by the direction of movemnt of plant part....known as trpoic movement The growth of the plant with respect to external factor that is stimulus...called as tropism..Types are ....1 . Phototropism 2 . Geotropism 3 . Chemotropism 4 . Hydrotropism 5. Thigmotropism. |
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| 54917. |
Why carbon make covalent bound? |
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Answer» Because of self linking property and tetravalency Due to Catenation and Tetravalency Carbon form covalent bond because ..1 is non metal always make covalent bond 2 is it needed 4 more electrons to complete its octate and And thats why it also tetravalent compound Carbon makes covalent bond because carbon can neither loose 4 electrons due to reqirement of lot of energy.....And not gain 4 more electrons due to its atomic structure is very strong and nuclear force acting on it heavily.....And also it is non metal so it forms covalent bond ......Thanks... ??? Carbon makes covalent bond because it is an non metal and non metal always form covalent bond. Because they need 4electrons to form their octave and no body share 4electrons |
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| 54918. |
Human eye diagram is deleted by CBSE |
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Answer» Never The most important diagram is deleted.... Sorry but unbelievable.... Is there any prove Hay MAN this is as much fake as this year bord exam will not conduct....Ok From where you got this news bro.Post that link here . |
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| 54919. |
the process of getting nutrition in amoeba |
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Answer» Anoeta takes this food by PSEUDOPODIA Phagocytosis Holozoic nutrition |
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| 54920. |
How are the sexes of an individual seprated |
| Answer» | |
| 54921. |
propanol structure |
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Answer» Ch3--ch2--ch2oh Sry i have given u the stuctural formula for pentanol Ch3---ch2---ch2---ch2---ch2oh C3H7OH |
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| 54922. |
Who Smallest part of kidney |
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Answer» Nephron Nephron Nephron is the smallest unit of kidney .....?? Nephron Nephron Nephron Nephron |
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| 54923. |
What substances are contained in oral pills used as contraceptives? |
| Answer» Progestins are comonly used in oral pills | |
| 54924. |
What is washing soda basic in nature? |
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Answer» Because it react with base to produce salt and water Abe khud hi answer de raha hai to pooch kyon raha hai Because it releases OH ions |
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| 54925. |
what is Principal axis |
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Answer» PA is the line passing through pole & coc Principal axis is a line joining the pole and centre of curvature It is an imaginary line which passes through \'pole and centre of curvature\'. Is the street carrying share offline |
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| 54926. |
Which mirror is used in solar panal????? |
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Answer» Concave mirror Concave mirror bro Concave mirror Concave Concave mirror Concave mirror |
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| 54927. |
write the structural formula of hex-2-one and hex-3-one. how do they differ? |
| Answer» | |
| 54928. |
Sample paper of 2018 19 |
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Answer» Get it on my CBSE guide Type cbse acedmic on google to get sample paper issued by board |
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| 54929. |
what is the best method to control population ? |
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Answer» Barrier method because it protect us fromSexually transmitted disease and it has no side effect. Example:-Condoms Using contraceptives condom and pills through which sexually transmitted diseases doesn\'t affect...... Loop and copper t Barrier method |
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| 54930. |
What is mean by carbon dioxide |
| Answer» It is one of the compound formed by Carbon and Oxygen. | |
| 54931. |
Describe the sexual reproduction of female and explain |
| Answer» Female reproductive system: This system includes a pair of ovaries, a pair of oviducts, uterus and ****** opening out through urethra.\xa0Eggs, the female gametes develop inside the ovaries. One mature egg is released by either of the ovaries in a month.Ovaries secrete two hormones namely estrogen and progesterone which bring about secondary sexual characters in females.The egg is carried from the ovary to the uterus through a thin oviduct also known as the fallopian tube.The two oviducts combine and open into an elastic bag-like structureknown as the uterus. The uterus opens into ****** through cervix. The uterus helps in the development of the foetus.Copulation: It is the act in which a male reproductive organ enters the female reproductive tract to discharge the male gametes.Fertilisation: It involves the fusion of male and female gametes to give rise to a single cell – zygote. Fertilisation can be external fertilisation or internal fertilisation.Zygote: It is the super cellformed by the fusion of pronuclei of male and female gametes. It divides repeatedly to form an embryo. Embryo gets implanted in the lining of the uterus for further development. | |
| 54932. |
Probable question 2019 |
| Answer» | |
| 54933. |
Plane mirror can make real images . Justify how? |
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Answer» A number of rays when traced from a point object will never converge after getting reflected from a plane mirror thus they will never form the real image. If you happen to relax the condition on object i.e. have a complex object (i.e. a hologram) then it is possible to form a real image after reflection from a mirror. No they form only virtual and erect imageThe image is formed behind the mirror that cannot be caught on screen |
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| 54934. |
Their definition in terms of furnishing of H+ and oH-ions |
| Answer» Acids are those substances which releases hyrogen ions when dissolve in water where as bases are those substances that gives out hydroxide ions when dissolved in watter | |
| 54935. |
WhaeT is rule of pitutary gland |
| Answer» The Pituitary gland, also known as hypophysis, is a pea-sized endocrine gland situated at the base of our brain. It is often referred to as the ‘Master Gland’ because it produces some of the important hormones in the body. It is situated in a bony structure called the Pituitary fossa, just below the hypothalamus, close to the optic nerve. | |
| 54936. |
How double fertilisation takes place in flowers?Explain. |
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Answer» \tThe process of fusion of one male gamete with the egg along with the union of the second male gamete with the two polar nuclei or the secondary nucleus is called double fertilisation.\tOut of the two male gametes, one fuses with the egg to carry out generative fertilisation or syngamy. It gives rise to a diploid zygote or oosphere.\tThe nucleus of the second male gamete fuses with two haploid polar nuclei or diploid secondary nucleus of the central cell to form a triploid primary endosperm nucleus (PEN). The central cell is called primary endosperm cell (PEC). This is called vegetative fertilisation or triple fusion Bad question |
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| 54937. |
What are uses of buckminsterfullerence???? |
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Answer» Make electrode in a cell,to make pencil lead,and other. Buckministerfullerene is the smallest fullerene molecule. A fullerene is a molecule made of only carbon. It has a variety of shapes like spherical, ellipsoid or tubes but they are hollow. In Buckministersfullerene, there are hexagonal and pentagonal rings but none of the pentagonal rings share an edge.Its uses are:-It is used as semi- conductors.It can be used as a molecular filter or a carrier for other molecules.Compressed buckministersfullerene can be used as a cutting tool or hardening agent.Its stability and bonding property makes it a good lubricant.Specially, when fluorine is attached on the exterior which increases the ability of its round shape.It can also be used as a storage for hydrogen atoms.It can also be used to hold and transfer safely radioactive wastes and materials. |
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| 54938. |
Explain Mendel\'s experiment. |
| Answer» He developed the model of heredity that now bears his name by experiments on various charactersitics of pea plants: height (tall vs. Short); seed color (yellow vs. Green); seat coat (smooth vs. wrinkled), etc. The other traits Mendel studied can be substituted for tall and short. | |
| 54939. |
What is the parameter which decides inheritance? |
| Answer» The parameter which decided the inheritance is the GENES or call it DNA which is genetic as well as transforming material. | |
| 54940. |
What is reason carbon form a strong bond |
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Answer» Because they have more catenation. There are four reasons why carbon can form strong bonds with most other elements:-1) Tetravalency :- Carbon has 4 valence electrons in its valence shell therefore it can easily form covalent bonds.2) Isomerism:- Carbon can form compounds which have the same molecular structure but different structural formula.3) Small size:- Carbon has a small atomic radii therefore the nucleus can hold the shared pairs of electrons firmly.4) Catenation:- carbon has a unique ability where it can form strong covalent bonds between atoms of itself. |
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| 54941. |
Melting and boiling point of carbon compound is low. Give reason? |
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Answer» Very high. Because carbon compounds are made of non metals compounds made of non metals are called covalent molecular substances covalent molecular substances have\xa0low melting and a boiling point because they re weak intermolecular forces between the molecules of the compound and needs only a little Thermal energy to separate their particles. |
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| 54942. |
What is a DNA copying and what is need of DNA in reproduction |
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Answer» Chromosomes in the nucleus of a cell contain information for the inheritance features from the parents to next generation in the form of DNA(Deoxyriobo nucleic acid).«So it\'s first importance is that characteristics of the parents are transmitted to the offspring.«DNA is already present in the nucleus of the parent cell. Nucleus is copied by certain biochemical reactions then slight variations come in the to copies of of the DNA molecules. So another importance of DNA copying is that variations are produced which form the basis for evolution. DNA copying is a biological process that occurs in all living organisms and copies their DNA. It is the basis for biological inheritance. It is also called as DNA replications. There can be small inaccuracies in DNA copying which lead to some variations, diseases etc.DNA copying is essential in reproduction because:1)Maintaining the body design that helps an organism to survive in the environment.The DNA is transferred from parents to offspring that makes them similar in many ways.2) To maintain the stability of population of a particular species, DNA copying is important . Because genes are transpar |
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| 54943. |
Why do we take in convex lens image is positive but form real and inverted image |
| Answer» For real it is -ve and for virtual it is +ve | |
| 54944. |
What is the function of petals in a flower |
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Answer» Basically it is provide the protection to flower from the outer environmental effects and also provide colors for the attraction of insects due to pollination. To protect the female part of flower from external injuries |
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| 54945. |
Why do we store silver chloride dark colors water. |
| Answer» Beacause of highly reactive | |
| 54946. |
Where the DNA is present? |
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Answer» In cell→ nucleus → chromosomes DNA is present in our body cells in small quantities In the cells.... In every part of the body |
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| 54947. |
What is nuclear power plant explain with the neat labelled diagram |
| Answer» In a\xa0nuclear power plant, heat energy is generated by a nuclear reaction called as\xa0nuclear fission. Nuclear fission of heavy elements such as Uranium or Thorium is carried out in a special apparatus called as a\xa0nuclear reactor. A large amount of heat energy is generated due to nuclear fission. Rest parts of a nuclear power plant are very similar to conventional\xa0thermal power plants. It is found that fission of only 1 Kg of Uranium produces as much heat energy as that can be produced by 4,500 tons of high grade coal. This considerably reduces the transportation cost of fuel, which is a major\xa0advantage of nuclear power plants. Also, there are large deposits of nuclear fuels available all over the world and, hence, nuclear power plants can ensure continued supply of electrical energy for thousands of years. About 10% of the total electricity of the world is generated in nuclear power plants.How Does A Nuclear Power Plant Work?Heavy elements such as Uranium (U235) or Thorium (Th232) are subjected to nuclear fission reaction in a\xa0nuclear reactor. Due to fission, a\xa0large amount of heat energy is produced which is transferred to the reactor coolant. The coolant may be water, gas or a liquid metal. The heated coolant is made to flow through a heat exchanger where water is converted into high-temperature steam. The generated steam is then allowed to drive a steam turbine. The steam, after doing its work, is converted back into the water and recycled to the heat exchanger. The steam turbine is coupled to an alternator which generates electricity. The generated electrical voltage is then stepped up using a transformer for the purpose of long distance transmission.The image below shows\xa0basic components and layout of a nuclear power station. | |
| 54948. |
Difference between binary and multiple fusion? |
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Answer» Binary Fission :(i) Nucleus divides into two parts.(ii) It occurs during normal conditions.(iii) It gives rise to two individuals.(iv) Cytoplasm divides after each nuclear division.e.g., Amoeba.Multiple Fission :(i) Nucleus divides into many parts.(ii) It takes place during unfavourable conditions (Encysted stage),(iii) It forms many individuals.(iv) Cytoplasm does not divide after every nuciear division.e.g., Plasmodium. Binary fission - when a cell split into two equal half during cell division is called binary fission. Ex- amoeba, bacteria. Multiple fission - when a cell of an organism divides into many daughters cell simultaneously it is called multiple fission. Ex- plasmodium, yeast. Binary fission in which cell divide into two daughter cells and multiple fission in which a single cell divide many daughter cells |
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| 54949. |
Explain the working of khadin system |
| Answer» The khadin system is based on the principle of harvesting rainwater of Farmland and subsequent use of this water saturated land for crop production | |
| 54950. |
define steps of Enrichment of the ore Or Concentratian of the ore |
| Answer» Concentration of ore-1.forth floating method2.electromagnetic separation 3.chemical separation | |