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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.
| 56851. |
what is electrolysis??? |
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Answer» In chemistry and manufacturing, electrolysis is a technique that uses a direct electric current to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. It is the process of refinning the metal by using electricity. |
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| 56852. |
Electric genrator working |
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Answer» How u put diagram The axle is rotated such that it moves in the clockwise directions that is AB moves up and CD moves down.According to Fleming\'s Right Hand rule, the induced current is setup in the coil along B1 AB→ BC→ CD→ B2. This means that the external current flows from B2 to B1.After half a rotation, arm CD starts moves up and AB moves down.According to Fleming\'s Right Hand rule, the induced current is setup in the coil along B2→ AB→ BC→CD→ B1. This means that the external current flows from B1 to B2.Thus after every half rotation of the coil, the current changes direction. This is called an AC current.AC current(Alternating current) : Changes its direction after equal intervals of time. It is easier to transmit this current over long distances due to lesser loses and hence this is the current that is supplied to our houses from the electricity department. |
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| 56853. |
Hydrogen is soluble in water or not |
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Answer» Yes ofcourse !! 4H2O? Yes it is soluble in water |
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| 56854. |
Why muscle cramps occurs? |
| Answer» Muscle cramp is an involuntary sudden contraction of muscle. Muscle cramps are caused due to over usage of muscle i.e. long run, rapid exercise etc. Cramps are also caused due to dehydration, muscle strain, holding in position for a long time. | |
| 56855. |
Chemical formula of bleaching powder and baking soda |
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Answer» CAOCL2 Chemical formula of Bleaching Powder is CaOCl2 ( calcium oxy chloride) and that of baking soda is NaHCO3 ( sodium hydrogen carbonate). CaOCl2 and NaHCO3 respectively CaoCl2 and Na2Co3.10H2O |
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| 56856. |
Working of solar cell panel |
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Answer» \tSolar cells converts solar energy into electricity.\tSince sun light will not be available during cloudy days, this cell can be used when there is sunlight to store the energy as electricity.\tMultiple solar cells put together form a solar panel and enhances quantity of electricity\tWorks on the principle of \'Photovoltaic effect\'.\tSolar cells are used in calculators, torches, traffic signals, TV and radio relay stations etc we can generate electricity by using it. |
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| 56857. |
Can watermelon can be grown by using vegetative propogation |
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| 56858. |
formula of bracking soda |
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Answer» NaHCo3 NaHCO3 NaHCO3 CaOCl² |
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| 56859. |
What is formullea of work with example |
| Answer» Work is said to be done when a body or object moves with the application of external force.Work = Force × Displacement = F.dNewton meter in termed and Joules and it is the unit of Work.Example. When we kick a football, we are exerting an external force called F, and due to this force (kick), the ball moves to a certain distance. This disposition of ball from position A to B is known as displacement (d). This work is said to be done and can be calculated as w = F.d | |
| 56860. |
Metal are acid or base....??? |
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Answer» Metals are basic in nature as they form basic componds like sodium hydroxide and magnesium hydroxide Acid Yes |
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| 56861. |
What are essential of chemical reaction |
| Answer» The three essentials of chemical reaction are(i) It should contain reactants and products. Reactants should write on the left hand side and products write on the right hand side of the reaction which are separated by an arrow.(ii) And the nature of reactants weather they are present in solid or liquid or gaseous or aqueous state which should be mentioned in brackets. Precipitates indicated with downside arrow and gases are indicated with upside arrow.(iii) It should indicate about the conditions (temperature, pressure and catalyst used) required in the reaction. These conditions should be mentioned on arrow between reactants and products. | |
| 56862. |
should fiber take with hot milk? |
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| 56863. |
Anybody can explain me whole topic "Evolutio"..? |
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| 56864. |
Explain the law of independent assortment with dihybrid Cross |
| Answer» Law of independent assortment: The law states that when two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters.In the dihybrid cross, the phenotypesround yellow; unwrinkled yellow; Round green and wrinkled green appear in the ration of 9 : 3 : 3 : 1Mendel proposed a second set of generalisation that we call Medel\'s law of Independent Assortment.The Punnett square can be effectively used to understand the independent segregation of the two pairs of genes during meiosis. Linkage is the exception of law of independent assortment.The production of eggs and pollen in the F, Rr, Yy plant. Fifty % of the gametes have the gene R and other fifty % have r segragation of 50% R and 50% r is independent from the segragation of 50% of Y and 50% of y. | |
| 56865. |
Why aucxin can use to growths for tree and food |
| Answer» No my fellow auxin help to grow in direction of light. And its also a growth harmone of tree | |
| 56866. |
Principle on which electric motor works?? |
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Answer» The electric motor is a device which converts electrical energy to mechanical energy. There are mainly three types of electric motor. All of these motors work in more or less same principle. Working of electric motor mainly depends upon the interaction of magnetic field with current. hard to explain!!!! |
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| 56867. |
Why the plane mirror not show an image ?sir/maam |
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| 56868. |
Why the tarnish copper vessel shines on applying lemon juice |
| Answer» Sour substance contain acid which on applying dissolve the coating of copper oxide or basic copper carbonate present on the surface of tarnished copper vessels and makes them shiny again.. | |
| 56869. |
Kya Bramhand ki Saktiyo ko Arjit kiya ja sakta hai To Kaise?????? |
| Answer» Nyz Quastion... I think you are curios to think. | |
| 56870. |
What is Ohm\'s low and it\'s formula? |
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Answer» The current passing through a conductor is directly proportional to the potential difference applied across the end of the conductor. Provided physical condition temperature ,length , area of cross section ,material of conductor should remain constant . Formula = V =I.R At constant temperature, potential difference between any two points in an electric circuit is directly proportional to the current flowing through circuit. V=I×R The current flowing through the conductor is directly proportional to the potential difference applied across it at constant temperature ie; V is directly proportional to I R=V/IWhere R is resistance of the conductor..... |
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| 56871. |
Boadimg in carban? |
| Answer» In case of carbon with atomic number 6 there are four electrons in its outermost shell due to which it is termed as tetravalent.\tIt gains or loses four electrons to attain the nearest noble gas configuration.\tCarbon has two possibilities to attain noble gas configuration.(i) One of the possibilities is to attain four electrons and form C4– anion. But it will be difficult for the nucleus to hold four more electrons firmly.(ii) Another possibility is to lose four electrons forming C4+ cation. But this will also be difficult due to the requirement of large energy to lose four electrons from the outermost shell. As a result the atom will contain six protons and two electrons.\tTherefore carbon shares its valence electrons present in its outermost shell with the electrons in the outermost shell of the combining atoms of other elements.\tDue to this sharing of four electrons of carbon with the electrons of other combining atoms, carbon is said to form covalent bonds. For example, carbon shares these electrons with four atoms of hydrogen.\tThe carbon-carbon bond is very strong and hence stable.\tCompounds possessing covalent bonds have strong bonds within the molecule, but intermolecular forces are small leading to low melting and boiling points of these compounds.\tDue to the sharing of electrons no charged particles are formed i.e. no ions are formed due to which covalent compounds are poor conductors of electricity.\xa0 | |
| 56872. |
Why do stars appear to twinkle ? Explain. |
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Answer» Candle light coming from a star enter the earth atmosphere it undergoes refraction due to the different optical densities of air at various altitude the atmosphere is continuously changing the continuously changing atmosphere refracts the light from the stars by different amounts from one moment to the next starlight reaching your eyes increases and decreases continuously due to atmospheric refraction and the stars appear to be Twinkle at night Because due to atmosphere refraction |
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| 56873. |
What is the ratio of F1 generation in monohybrid cross???????? |
| Answer» 3:1 | |
| 56874. |
what is caustic soda ?Give one example |
| Answer» sodium hydroxide is also known as caustic soda. | |
| 56875. |
What is meant by hydrolysis of water in presence of acid |
| Answer» Electrolysis (of acidified water) is a way of splitting up (decomposition) of the compound (water) using electrical energy. The electrical energy comes from a d.c. (direct current) battery or power pack supply. A conducting liquid, containing ions, called the electrolyte (dilute sulfuric acid), must contain the compound (water) that is being broken down. The electricity must flow through electrodes dipped into the electrolyte to complete the electrical circuit with the battery. Electrolysis can only happen when the circuit is complete, and an electrical current (electricity) is flowing, then the products of electrolysing dil. sulfuric acid are released on the electrode surfaces where they can be collected. Electrolysis always involves a flow of electrons in the external wires and electrodes and a flow of ions in the electrolyte and there is always a reduction at the negative cathode electrode (which attracts positive ions, cations) and an oxidation at the positive anode electrode (which attracts negative ions, anions) and it is the ions which are discharged to give the products. | |
| 56876. |
Why is sexually produced offsprings have better chances of survival |
| Answer» Sexual reproduction is considered to be a better mode of reproduction because it creates a hybrid that has more vigor than the parents. It also leads to variations that enable organisms to adapt to the changing or prevailing environment. Variations are introduced during meiosis in sexual reproduction, which is an important tool for evolution. It adds survival value to particular species. | |
| 56877. |
Why is the solar lower box covered with plane mirror |
| Answer» Box type solar cooker so that it will reflect light ray which further pass through a transparent medium(glass) and get converted into infrared ray. The longer infrared rays are not able to pass back out through the glass (transparent) covering and are thus retained inside the box. | |
| 56878. |
Bio mass |
| Answer» The matter which is obtained from living organisms like plant waste ,kitchen waste. | |
| 56879. |
Carbon chapter ko Kese yad kere tips batho |
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Answer» Make notes as well as revise 1-1 topic daily Ulta latak ke Just sit for 1 hour with full concentration and learn Notes bana lo usea learn kar lo so simple |
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| 56880. |
What is Monohybrid cross ? |
| Answer» A monohybrid cross is a mating between two organisms with different variations at one genetic chromosome of interest. | |
| 56881. |
Balance equation: KMnO4+HCL --- Kcl+Mncl2+cl2+H2O |
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Answer» 2 KMnO4+ 16 HCl -----------> 2 KCl + 8 H2O + 5 Cl2 + 2 MnCl2 Plz check your equationI cant be balance Its wrong |
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| 56882. |
What is the mean of photo receptors |
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Answer» They are präsent in ihr eye These are present in our eyes they are sensitive of light Eyes The receptors which are sensitive to light are known as photoreceptors |
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| 56883. |
What is life resources |
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Answer» Life resource is basically a need on which every human being is dependent Like human depend on plant and water And animal depend on plant and water or other animal who\'s life resource is plant And plant depend on sunlight and water Water is the main life resource for all human being The things which are formed by human known as human resources |
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| 56884. |
Mercury is which type of metal |
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Answer» It is a metal which has exception Only when it is in liquid for when it is in room temperature Otherwise it is hard mercury is liquid in state Liquid All metals are solid but exception mercury is a liquid metal Liquid Liquid |
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| 56885. |
Why calcium metal after reaction with water start floating on its surface |
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Answer» Because in water calcium releases bubbles of h2o CaO + H2 gas |
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| 56886. |
Which is the called master gland |
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Answer» Pituitary gland But in some cases the hypothalamus signals the pituitary gland to stimulate hormone production. But pituitary gland is always referred as master gland. It is the main endocrine gland.It is called the master gland because it produces harmones that control other glands. Ankit , pituitary gland in not master gland,because this gland is controlled by hypothalamus . Pituitary gland is the master gland |
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| 56887. |
What is ereflexi |
| Answer» If you mean areflexia, then it is an absence of a reflex and\xa0a sign of possible nerve damage. Areflexia is\xa0a symptom associated with many neurological disorders. | |
| 56888. |
Acidic acid fomula |
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Answer» Acetic acid\'s formula is CH3COOH.... I THINK ITS ACETIC ACID and ITS FORMPULA IS CH3COOH Ch2oooco3 |
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| 56889. |
What is OBEC (sources of energy)? |
| Answer» Acidic acid formula | |
| 56890. |
Plz try to balance the equationC3 H5 N3 O9→ CO2+N2+O2+H20 |
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Answer» 2C3H5N3O9----------> 6CO2 + 3N2+ O2 +5H2O 2C3H5N3O9 6CO2 + 3N2+ O2 +5H2O |
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| 56891. |
Who discovers the PH scale first? |
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Answer» Thanks to all? Soren peder lauritz (sorensen) in 1909 Sorenson Sorenson Sorenson |
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| 56892. |
Define Pleura |
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Answer» It is a covering of lungs protect from external injuries or shock\xa0 the thin serous membrane that covers a lung and lines the chest cavity in mammals |
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| 56893. |
Balance the following equationHNO³+CA(OH)2-CA(NO³)²+H2O |
| Answer» 2HNO3 + Ca (OH)2 - Ca(NO)3 + 2H2O | |
| 56894. |
How to score marks in physics? |
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Answer» S chand book is best ✔YES, DO FOLLOW THE NCERT BOOK thouroghly and I also recommend u to follow the S.CHAND\'s Book for science.And plz regularly practise the physics numericals likewise u do in maths.✔Hope this will help u my frnd!!!?? Want marks then use only ncert book Pratham is correct?. Moreover, the best thing you can do is forgetting about the book and the topics? Do not open the book |
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| 56895. |
Explain the process of urine in humans body |
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Answer» ✔Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body. ... This amount varies according to fluid intake and kidney function.✔Hope this will help u my frnd!!!!?? The process of urine formation is done by the small structures in our kidney all nephrons have a small capillaries called glomerulus and a cup like structure called bowman\'s capsule the artery bring the blood with urine hear where it is possible through the two wheeler part of nephron where all the good elements like glucose amino reabsorbed and the urine Get Collected in the collecting duct |
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| 56896. |
Hormone and gland which is responsible for growing of mustaches and undearm hairs |
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Answer» ovaries- estrogen, progesterone ( female) Testes- testestrone Testestrone is responsible for developing sexual characters and for development of genetical parts |
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| 56897. |
How many type of juice in our body? |
| Answer» 4 type of juce in our body 1digestive juice 2 pancreatic juice 3gastric juice 4 bile juice | |
| 56898. |
What is series connection |
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Answer» a combination in which two or more resistances are joined end to end so that the same current flows through each of them they are said to series combination when series combination of resistances is connected through a battery the same current flows through it Series connection means current flow only one direction it is not a parallel combination . when one circuit is doing stop so all circuit working stop The type of in which devices or resistance is connected in series is known as series connection. In series connections current (i) is constant and voltage is different (v). |
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| 56899. |
Why rainbow looks semi-circular? |
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Answer» because we can see the light rays of primary rainbow which comes at angles of43° to 45°. such rays can come only from a circular belt of rain drops.and rays of secondary rainbow make 52° to 55°. Actually it is not semi circle it is a circle but v can see a half because v live in one himesphere It is is circle because the rain drops which scatter r epual distane from us if u know the rule of formation of rainbow then u can understand my point Due to dispersion of light |
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| 56900. |
what do you mean by crystallisation of water? |
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Answer» thanks It is the fixed number of water molecules present in one formula unit of a salt.Eg:- In water Na2CO3. 10H2O, there is 10 no. of water of crystallisation. |
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