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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.
| 69701. |
What is the formula for baking powder? |
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Answer» But i asked about baking powder. Why are u telling about baking soda? Ok NAHCO3Baking soda is nothing but sodium bicarbonate, which can be denoted by the chemical formula NaHCO3. Baking soda is basically a salt that comprises a sodium cation which can be represented as Na+ and a bicarbonate anion which can be represented as HCO3–.Baking soda is a white, crystalline solid that has a salty taste. It is quite useful in baking as a leavening agent – a substance that causes foaming, leading to the softening of the mixture. It is also referred to as sodium hydrogen carbonate. |
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| 69702. |
What is the chemical name limstone? |
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Answer» Caco3 CaCO3 Calcium Carbonate is the chemical name for limestone.Limestone is a carbonate sedimentary rock that is often composed of the skeletal fragments of marine organisms such as coral, foraminifera, and molluscs.Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). |
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| 69703. |
A Bulb is rated 40W, 220V.find the current drawn by it when it is Conneted to a 220V supply? |
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Answer» P = 40 wattV = 220 voltP=VII=P/VI=40/220I=0.18 A Ok |
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| 69704. |
Defination of chemical reaction |
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Answer» All are copy paste batch Chemical reaction is a process in which two or more substances react to form a new substance. Reactants and products are included in it. The substances which undergo the reaction on known as Reactants and the new substances which are formed after the reaction or known as products A chemical reaction is a process in which two or more substances react to form some other new substances with a new set of properties. For example, 2AgBr(s) → 2Ag(s) + Br2(s) (silver bromide) (silver) (bromine)#Hope helpful.. a n s w e r :Chemical reactions - The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atoms is known as Chemical Reaction. Chemical reactions-\xa0The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atoms is known as Chemical Reaction. |
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| 69705. |
Why two hormones are produced in females while in Male only one |
| Answer» Male hormones, such as\xa0testosterone, are usually referred to collectively as\xa0androgens. The female hormones consist of two principal groups: the\xa0estrogens\xa0(e.g.,\xa0estradiol) and the progestins (e.g.,\xa0progesterone).Hormones are natural substances produced in the body. They help to relay messages between cells and organs and affect many bodily functions. Everyone has what are considered “male” and “female” *** hormones.Keep reading to learn more about the female *** hormones, how they fluctuate throughout your life, and signs of a hormonal imbalance.Types of female *** hormonesThe two main female *** hormones are estrogen and progesterone. Although testosterone is considered a male hormone, females also produce and need a small amount of this, too.EstrogenEstrogen is the major female hormone. The lion’s share comes from the ovaries, but small amounts are produced in the adrenal glands and fat cells. During pregnancy, the placenta also makes estrogen.Estrogen plays a big role in reproductive and sexual development, including:\tpuberty\tmenstruation\tpregnancy\tmenopauseEstrogen also affects the:\tbrain\tcardiovascular system\thair\tmusculoskeletal system\tskin\turinary tractProgesteroneThe ovaries produce the female *** hormone progesterone after ovulation. During pregnancy, the placenta also produces some.The role of progesterone is to:\tprepare the lining of the uterus for a fertilized egg\tsupport pregnancy\tsuppress estrogen production after ovulationTestosterone\tSmall amounts of testosterone come from the adrenal glands and ovaries. This hormone plays a role in several body functions, including:\tsexual desire\tregulation of the menstrual cycle\tbone and muscle strength | |
| 69706. |
What is the full form of POP. Write its three uses |
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Answer» The full form of POP is Post office protocol Full Form of POP is Plaster of Paris Full from of pop stand for plaster of Paris And their uses are1) making of toys, statues2) it is used to join bone fracture3) plaster of Paris is a building materials that is used as a protective coating on walls and ceiling Plaster of Paris |
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| 69707. |
What is the definition of spherical mirror? |
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Answer» Spherical mirror are two types - concave and convex they are non reflecting Spherical mirror are the part of a sphere glass whose inner or outer side is polished and non reflecting. There are 2 types of spherical mirror - concave and convex mirror. Spherical mirror are the part of a sphere glass whose inner or outer side is polished and non reflecting. There are 2 types of spherical mirror - concave and convex mirror. Spherical mirrors\tMirrors, whose reflecting surfaces are spherical, are called spherical mirrors.\tThe reflecting surface of such mirrors can be considered to form a part of the surface of a sphere.\tA spherical mirror, whose reflecting surface is curved inwards, i.e. faces towards the centre of the sphere, is called a concave mirror. The reflecting surface of a sphere is called a spherical mirror |
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| 69708. |
How to make chemical formulas? |
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Answer» For a chemical formula we have to first write names of elements or compounds which are to be reacted for making formula .First write all elements or compounds which should be used for making formula.Then write their valency at bottom of them .Cross multiply valencies from Elements or compounds .Formula is obtained. By use equation |
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| 69709. |
Definition of ohm\'s law in short way |
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Answer» It states that current flowing between two points in a circuit is directly proportional to the potential difference across these two points where resistance is considered as constant V=ir V=IR |
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| 69710. |
Full process of human reproduction |
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Answer» Reproduction in human beings The male gamete or *** cell is called sperm(it has long tail,motile and can move independently). The female gamete or *** cell is called ovum or egg(It contains water,stored food and nucleus). Fusion of egg and sperm give rise to a single cell called ZYGOTE. The fusion of male gamete with female gamete to form a zygote during sexual reproduction is called fertilisation.The zygote grows and develops to form a new baby .The stage of development between zygote and newly formed baby is called embryo. The fertilisation which occur inside the female body is called internal fertilisation. During internal fertilisation,male put his sperm inside a women body through an organ called *****.These sperms then fertilise the egg inside the woman’s body. The fertilisation which occur outside the female body is called external fertilisation.For Ex:Frogs,Toads,fishes. The male and female animal releases their sperm and egg in water where fertilisation take place by collision between them. Fertilisation 1)Sperms made in testes are introduced into ****** of woman through ***** during mating.Million of sperms are released into the ****** at one time.The sperms are highly active and mobile.The sperm move up through cervix into uterus.From uterus,sperms pass into oviduct. 2)One of the oviduct contain egg released by the ovary during ovulation.Only one sperm fuses with the egg in oviduct to form Zygote.The fertilisation of egg take place in oviduct. 3)The zygote divides rapidly by mitosis as it moves down slowly in oviduct and form a hollow ball of hundred of cells(embryo).The embryo sinks into soft and thick lining of uterus and get embedded in it.The embedding of embryo in the thick lining of uterus is called implantation. 4)After implantation a disc like special tissue develops between uterus wall and embryo or foetus called placenta.The foetus is connected to placenta in mother body through umbilical cord. The exchange of nutrients,oxygen,waste products between embryo and mother take place through the placenta. The time period from fertilisation upto birth of baby is called gestation(9 months) The baby is born as a result of rhythmic contraction of muscles in uterus. Read ncert |
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| 69711. |
What is the equation of oxygen |
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Answer» O2 O2 Co2 The chemical symbol for oxygen is O, but pure oxygen exists as diatomic (“two-atom”)\xa0molecules, represented by the\xa0chemical formula\xa0O2. A molecule of the compound\xa0carbon dioxide\xa0consists of one atom of carbon and two\xa0atoms\xa0of oxygen, so\xa0carbon dioxide\xa0is represented by the\xa0chemical formula\xa0CO2. |
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| 69712. |
What is universe |
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Answer» From my view, Universe is a huge bag of many solutions and reactions such as due to reaction there are billions of gases and stars and planets are formed and many solutions such as clouds, darkness, asteroids, black hole and many many more things consisting which we are able to see and many things which we are not able to see. It is beyond of our thinking. Q. What is the Universe ?A n s w e r. A galaxy is a huge system of billions of stars, and clouds of dust and gases. Millions of such galaxies make up the universe. |
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| 69713. |
In the following g sciatic diagram In place of zinc copper tuning s are taken |
| Answer» \xa0Copper does not react with dilute acids in normal condition because copper lies at lower position in reactivity series and is considered as a noble metal.So, if copper turning is taken in place of zinc granules, no reaction will take place. | |
| 69714. |
Define pepsinogen |
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Answer» Pepsinogen is the inactive form of pepsin secreted by gastric gland in stomach. HCl convert pepsinogen( inactive form) into pepsin(active form) for conversion of protein into peptons in acidic solution. Pepsinogen is a digestive enzyme that helps in the digestion of proteins. Enzyme pepsinogen is converted to pepsin and then the proteins are converted into amino acids. The hydrochloric acid secreted in the stomach activates the pepsinogen enzyme required to digest proteins. |
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| 69715. |
What is pH range and what is pH value? |
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Answer» pH range determined whether the solution is in acidic and basic range in ph paper.Main function of ph paper is to detect the strength or power of the chemicals . Ph value is value which identifies an acid , salt or a base , and the combination of ph values of acid , base or salt us called as ph range Acid - 1-6 Here , range is 1 to 6 and values are 1,2,3,4,5,6Base - More than 7 , range is 7-14 , values are 7,8,9,10,11,12,13,14Salt - 7 Here is no range but value should 7 to have a salt |
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| 69716. |
Differnce detween breathing and respiration |
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Answer» Breathing means inhale and exhale of air.Respiration is a physio biochemical process in which glucose breakdown into energy in the form of ATP Breathing means inhaling oxygen and exhaling carbon dioxide and respiraton is the process of utilising the food materials into simple components to get energy to do work. |
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| 69717. |
Are all Nephrons connected to each other? |
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Answer» Thanks Yes Yes Yes |
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| 69718. |
How many times a solution of pH=3 be diluted to get a solution of pH=6? |
| Answer» In order to change the pH from 3 to 6 you need to dilute the solution by adding water in itAs we can see that we are changing the pH by a factor of 3 that is we are diluting the solution by adding 1000 ml of water or you can say in general terms by diluting the solution 3 times.Therefore in order to make the pH 6 you need to dilute the solution 3 times. | |
| 69719. |
DM me 8830407975 |
| Answer» | |
| 69720. |
What happen when a metal react with another metal in solution form |
| Answer» It will form alloys | |
| 69721. |
Explain transportation of food in plants through phloem. |
| Answer» The\xa0phloem\xa0tissue in\xa0plants\xa0transports\xa0food\xa0materials from the leaves to different parts of the\xa0plant. The\xa0transportation of food\xa0in\xa0phloem\xa0is achieved\xa0by\xa0utilizing energy from ATP. As a result, the osmotic pressure in the tissue increases forcing the water to move\xa0through\xa0it. | |
| 69722. |
1. How many covalent bonds are there in a molecule of ethane, C H? |
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Answer» 4 Seven bonds There are seven bond in ethane one with c-c and another six with C-H. There are six C - H bond in ethane |
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| 69723. |
How can i make notes |
| Answer» Just read the books and mark some important lines which u think that is important and note it down in your notebook with topic and chapter wise. Don\'t forget to make your notes otherwise u will not going to get good marks. | |
| 69724. |
i forget which i have learnt |
| Answer» | |
| 69725. |
Who was Charles Dervin? |
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Answer» Please don\'t ask that\'s type of questions He was o nutritionirst Anupma r u tv actress Charles Darwin was a scientist he gives a theory of evolution |
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| 69726. |
Question of balance equation ch-4 class 10 cbse |
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Answer» Question of balance equation scienca ch - 4 carbon and it\'s compound class 10 cbse Question of balance equation ch-4 cbse class 10 |
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| 69727. |
write the energy, changing during lightning⚡??? |
| Answer» Kinetic energy into heat and light energy. | |
| 69728. |
Differentiate unisexual and bisexual with example |
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Answer» \tUnisexual reproductionBisexual reproductionOrganism posses either male and female organs, are unisexualOrganism posses both male and female organs, are unisexualFlower that contains either Stamen (male *** organ) or pistil (female *** organ).Flower that contains both Stamen (male *** organ) and pistil (female *** organ). In this case reproduction takes place through self pollination and cross pollination\t | Unisexual Flower | Bisexual flower | \t\t\tFlowers which have only one *** organ (either stamen or carpel) are known as unisexual flowers.Flowers which have both *** organs (stamen and carpel) are known as bisexual flowers.Example: flowers of papaya, watermelon.Example : flowers of hibiscus, mustard plants.\t|
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| 69729. |
Why do electron move freely in metal |
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Answer» Because metals have large atoms than non metals Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions. The electrons then move freely throughout the electron sea. |
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| 69730. |
What is electricity ? (concept) and potential difference ? |
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Answer» Electricity is a study of charges . Potential difference is work done required to bring a charge from one point to another . Electricity means to study about current , charge , circuit etc Electricity is a flow of current .and the relationship of voltmeter and ampere from one point to another point |
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| 69731. |
Camical equation |
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Answer» A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulaes, wherein reactants lie in left hand side and the product lie in right hand side. Hope it helps you ? Definition?? |
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| 69732. |
Eno contains baking soda or baking powder |
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Answer» Na2So4 Baking soda Baking soda |
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| 69733. |
Draw a ray diagram in the mirror when m =-1 |
| Answer» Dear Student,Good question, Thanks for asking!!!!Given Concave mirror :1) m=-1it means the image is real inverted and same size as Object.Such image we will obtain when we keep an object on Centre of curvature.2)m=-0.5Image formed will be real , inverted and diminishedSo such image is obtained when we keep the object beyond C.3)m=-3Image formed is real, inverted and magnified.So to obtain this , object must be placed between F and C.4) m=+1.5Image formed is virtual, erect and magnifiedSo object must be placed in between P and F.Please refer the attachments for the ray DiagramHope its Clear!!! | |
| 69734. |
Write the properties of magnet. |
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Answer» \tAttractive Property\xa0– Magnet attracts\xa0ferromagnetic\xa0materials like iron, cobalt, and nickel.\tRepulsive Properties\xa0– Like magnetic poles repel each other and unlike magnetic poles attract each other.\tDirective Property\xa0– A freely suspended magnet always points in a north-south direction. (1)Like\xa0magnetic poles repel each other and unlike magnetic poles attract each other.(2)A freely suspended magnet always points in a north-south direction.(3)Magnet attracts ferromagnetic materials like\xa0iron, cobalt, and nickel. |
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| 69735. |
Differentiate between open and close circuits |
| Answer» \xa0A circuit is said to be closed when every part of it is made of a conductor and on plugging in the key or on being complete, current flows through the circuit.\xa0The key in the closed circuit represented as (.)A circuit is said to be open when no current flows through it. It can happen when the key is not plugged in or when any one of its components is not made of a conductor or when the circuit is broken.\xa0\tThe key in an open circuit represented as ()\xa0\t | |
| 69736. |
Pick the odd one.(A) plants(B) animals(C) rivers(D) paper |
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Answer» Paper Paper ..... is correct answer Paper is the correct answer D Paper |
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| 69737. |
Important notes of life process |
| Answer» Download CBSE class 10th revision notes for Chapter 6 Life Processes in PDF format for free. Download revision notes for Life Processes class 10 Notes and score high in exams. These are the Life Processes class 10 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.Revision Notes\xa0for Class 6 Science\xa0Download as PDF | |
| 69738. |
Why diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans |
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Answer» Because in human beings body cells are not in direct contact of external environment In multicellular organism the body of living is not in direct contact with the surroundings so diffusion is unable to meet the needs of that organism. Human beings are multicellular organisms having a complex body structure. The oxygen requirement in multicellular organisms cannot be met by diffusion because-\xa01) Diffusion is a slow process.\xa02) In multicellular organisms, the\xa0cells are not in direct contact with the outside environment as in unicellular organisms.Therefore, in human beings, there are specialized tissues and organs that help to meet the oxygen requirements of the body. |
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| 69739. |
Explain in detail abot asexual reproduction |
| Answer» Asexual reproduction is a mode of reproduction in which the new offspring arise from a single parent. The offsprings are identical to each other, both physically as well as genetically. They are the exact copies of their parent\xa0cell. Hence, they are ‘clones’. We observe asexual reproduction in both unicellular and multicellular organisms.Features of Asexual Reproduction\tIt involves a single parent\tThere is no gamete\xa0formation\xa0or\xa0fertilization\tThe whole process takes place in a small period of time\tRapid multiplication and\xa0growth\xa0happens\tThere is limited\xa0variation\xa0(genetically similar offsprings) | |
| 69740. |
Which non metal is liquid |
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Answer» Bromine It\'s Bromine Bromine |
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| 69741. |
The sting of wasp is acid or base and how it can be neutralize |
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Answer» Alkaline liquid into the skin.It can be neutralise by vinegar(acetic acid). It is alkaline in nature. It can be neutralised by adding vinegar. |
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| 69742. |
Explain why are there two principal focus in case of spherical lenses |
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Answer» Because they are bispherical lenses, i.e they have two spherical sides (concave or canvex) \xa0lens is made up of two such transparent mirrors , hence when we consider its principle focus both of them are considered. also if the lens has only one focus then a ray diagram is not possible as when the incident ray is at infinity then the light rays cannot converge at the focus of the lens( which is before the lens or on its left side) as the lens undergoes refraction and not reflection. |
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| 69743. |
What is a thermometer |
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Answer» Thermometer is device used for measuring temperature Thermometer is a device that measure temperature Or a temperature gradient Thermometer is a device used to measure temperature. Thermometer is a device which is used to measure temperature. Thermometer is made of a long narrow glass tube; with a bulb at one end. The narrow tube appears as a continuous silver line; because it is filled with mercury. Mercury is a metal which is in liquid state at room temperature and it readily expands or contracts at the slightest change in temperature. Hence, mercury is used in thermometer. |
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| 69744. |
What is infundibulum? |
| Answer» The infundibulum of the heart, or conus arteriosus, is the outflow portion of the right ventricle. | |
| 69745. |
Happy independence day friends |
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Answer» Thank you Thanks Nisha Same to you U 2 ???? Where is use of pronoun |
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| 69746. |
CaO (s)+H2O(l)------>Ca(OH)+Heat is type of reaction |
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Answer» Exothermic reaction The reaction between calcium oxide (CaO) and water (H2O) to form calcium hydroxide Ca(OH)2 is an exothermic combination reaction.This is because: Calcium oxide reacts with water to form slaked lime Ca(OH)2 which means the oxides of calcium combine with molecules of free molecules of O- and H+This reaction generates a lot of heat accompanied with hissing sound and thus is stated to be exothermic. |
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| 69747. |
Different between metals and non metals |
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Answer» \tSerial No.MetalsNon-Metals1Metals are malleable.Non-metals are non-malleable or brittle.2Metals are ductile.Non-metals are non-ductile3Metals are good conductors of heat and electricity.Non-metals are bad conductors of heat and electricity.4Metals are Lustrous and can be polished.Non-metals are non-lustrous and cannot be polished.5Metals are solid at room temperature.Non-metals may be solid, liquid or Gases at room temperature.6The melting and boiling points of metals are generally high.Non-metals have low melting and boiling points as compared to metals.7All metals are strong.Non-metals are not strong.8Generally, metals are hard.Most of Non-metals are soft.9Metals are heavy.Non-metals are light substances.10Metals are sonorous.Non-metals are non-sonorous.11All metals react with oxygen to form metal oxidesAll non-metals react with oxygen to form acidic or neutral oxides.12Metals react with water to produce metal oxide (or metal hydroxide) and hydrogen gas.Non-metals do not react with water.13Metals react with a dilute acid to form a metal salt and hydrogen gas.Non-metals do not react with dilute acids .14All metals react with chlorine to form ionic metal chlorides.Non-metals react with chlorine to form covalent chlorides.15Only a few metals like Na, K, Ca and Mg react with hydrogen to form metal hydrides.Non-metals react with hydrogen to form covalent Hydrides.\t They are good conductor pf heat---metalThey are bad conductor of heat---- non metal |
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| 69748. |
Write the name of two nature of particle |
| Answer» 1.Particle theory pf light2. Wave theory of light | |
| 69749. |
What is particle theory of lighy |
| Answer» In optics, the corpuscular theory of light, arguably set forward by Descartes in 1637, states that light is made up of small discrete particles called "corpuscles" which travel in a straight line with a finite velocity and possess impetus. This was based on an alternate description of atomism of the time period. The\xa0model of light\xa0and the\xa0particle model of light, which together describe the wave-particle\xa0duality in which\xa0light\xa0is understood to possess both wave and\xa0particle\xa0functions. The wave theory and the\xa0particle\xa0theory of\xa0light\xa0were long considered to be at odds with one another. | |
| 69750. |
How many types of nature of light |
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Answer» The emission of free electrons from a metal surface when the light is shone on it, it is called the photoemission or the photoelectric effect. This effect led to the conclusion that light is made up of packets or quantum of energy. Now the question was whether the light quantum theory was indicative of the particle nature of light. Einstein already associated the light quantum with momentum. This strongly supported the particle nature of light and these particles were named\xa0photons. Thus, the\xa0wave-particle duality\xa0of light came into the picture.Photoelectric Emission 2 |
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