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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
121. Total number of Groups in Modern Periodic Table is:(A) 7(B) 11(D) 15 |
| Answer» <p>18 is the correct answer of the given question</p> <p>18 total number of groups are there in modern periodic table</p> <p>18 is the correct answerby the way in which stndrd do u stdy??</p> <p>18 is the correct answer</p> <p>there are 18 groupsbut 18th group also called 0 group</p> <p>total number of groups in modern periodic table is 18</p> | |
| 652. |
Silver (atomic weight 108 g mol) has a densityofT05 gorn-3. Thenumberofsilver atoms on asurface of area 10 m can be expressed inscientific notation as y x 10. The value of x is122(b) 57 |
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| 653. |
20, Silver (atomic weight = 108 g mon has a densityof 10.5-g. Cm 3 The number of silver atoms on asurface of area 101 m can be expressed inscientific notation as y x 10%. The value of x is(b) 5lo |
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| 654. |
cenduchr and insulatess on the bai olHMesisPante |
| Answer» <p>Conductor: Substances that can conduct electricity easily and offer very low resistance (opposition) to the flow of current is called good conductors. Example: Copper, Iron, Gold, Silver etc.</p><p>Insulator: Substances that offers very very high resistance (opposition) to the flow of current and hardly allows any current to flow through them are called good insulator. Example: oil, air, Bakelite etc.</p> <p>Piz or questions ke answer bhi de to </p> | |
| 655. |
Problem 3.02. A thin prism of 5° angle givesdeviation of 3-20. What is the value of refractiindex of the material of the prism ? |
| Answer» <p>D = ( n – 1 ) A</p><p>3.2 = (n – 1 ) 5</p><p> 0.64= n – 1</p><p>n = 1.64</p> | |
| 656. |
who is rani of gondvan |
| Answer» <p>Rani Durgabati is the right answer.</p> <p>Your correct answer is Rani durgabati</p> <p>rani durgawati is correct</p> <p>Rani Durgabati Is The Right Answer Of Your Question.</p><p>Please Like My Answer And Then I Will Also Like Your Answer.</p> | |
| 657. |
5. What are biospiere ros6. What is species diversity? What is its importantancdiversity ?7. How is biodiversity useful in agriculture?8. How is biodiversity important/used for medicinal ber9. Give any three examples to show how human activi10. Bring out the effects of fragmentation of habitats orn11. What are biodiversity hot spots ? Who introduced thihot spots ?. DIFFERENTIATE BETWEEN:1. In situ Conservation and Ex situ Conservation2. National park and Sanctuary3. National park and Biosphere Reserve |
| Answer» <p>Farmers realize the importance ofbiodiversity, which refers to the variety of plants, animals and microorganisms above and below the soil within an ecosystem. Farms are ecosystems in and of themselves. Each part, from the soil to the animals that live there to the crops themselves, has animportantrole to play.</p> | |
| 658. |
I. (a) The relation between radius of curvature and focallength is(i) f=r111) f=-(ii) f-2r(iv) f=-ă3(b) Ifincident angle is i and refracted angle is r, then theangular deviation will be(i(ii) i -r(iv)..sin isinr(iii)sin rsin i(c) Which formula is wrong among the following?(ii) V = IR5Gin 1-V(iv)R |
| Answer» <p>1)r=2f then f=r/22) option c</p> | |
| 659. |
B-6. Internal forces in a system can change(A) Linear momentum only(B) Kinetic energy only(C) Both kinetic energy and linear momentum(D) Neither the linear momentum nor the kinetic energy of the systemn air wรกth different velocities. While they are in air acce |
| Answer» <p>The work done by the internal forces can increase the kinetic energy of the body.</p> | |
| 660. |
8. Internal forces can change(a) the linear momentum but not the kinetic energy(b) the kinetic energy but not the linear momentum(c) linear momentum as well as kinetie energy(d) neither the linear momentum nor the kinetic energy |
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| 661. |
8. Internal forces can change(a) the linear momentum but not the kinetic energy(b) the kinetic energy but not the linear momentum(c) linear momentum as well as kinetic energy(d)neither the linear momentum nor the kinetic energy9. A hullot laid |
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| 662. |
32. The quantities, which remain conserved in a nuclear reactiorn(A) Total Charge(C) Linear momentum(B) Angular momentum(D) All the above |
| Answer» <p>All of these are conserved during a nuclear reaction.</p> | |
| 663. |
CtionBuddin7. Name two plants which usually reproduce withoseeds |
| Answer» <p>ferns and mosses are the plants which reproduce without seeds. </p> <p>Thank U friend Tanzeeya </p> | |
| 664. |
Name two plants in which one has joined sepals and the other hassepals.13. |
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| 665. |
5.Very short answer type questions.a) Name two plants whose stems are used as food.enare their food. |
| Answer» <p>ther are many plants example ginger,garlic,turmaric,potato</p> <p>Carrot's, betts ,spinach etc.</p> | |
| 666. |
List changes in the body that take place at puberty4. |
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| 667. |
Imagine you are eating something hard likea green guava. What kinds of changes takeplace in it-from the time you bite a pieceand put it in your mouth to when youswallow it? |
| Answer» <p>Firstly i felt an amazing tasteThen after chewing i found pulp and seeds and rich juice and after fully chewing i swallowed</p> <p>When we bite a green guava, we take in a small piece it in mouth. Inside the mouth it starts mixing with the saliva. Then we chew it, it gets mixed with the saliva. Then the process of digestion starts. This saliva mixes with food swallowed easily. </p> | |
| 668. |
Human Digestive SystemActivity 1Description:Divide the human digestive system into various stages.Draw a flowchart depicting various stages of humandigestive system alonwith the organs involved.2. |
| Answer» <p>name three organs involved in the digestive system</p> | |
| 669. |
7.Describe characteristics and uses of coke. |
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| 670. |
What are wasWhat are the uses of acids 7 |
| Answer» <p>often used to remove rust and other corrosion from metals in a process known as pickling. They may be used as an electrolyte in a wet cell battery, such as sulfuricacidin a car battery. Strongacids, sulfuricacidin particular, are widely used in mineral processing</p> | |
| 671. |
1. Why do animals build homes? k |
| Answer» <p>to protect themselves from weather and other wild animal</p> | |
| 672. |
13 TRANSPORT OF SUBSTANCES INPLANTS |
| Answer» <p>By this process, plants synthesize their food in the leaves. For trees, leaves are considered to be food factories. For the process of photosynthesis, raw materials should be transported to the leaves. For transport in plants, they need a transport system to move food, water, and minerals around because for them no heart, no blood, and since these plants do not have a circulatory system, transportation makes up for it.</p><p>Why is Transportation An Essential Process?</p><p>To circulate water, essential nutrients, excretory products and gases within the plants for various purposes, transportation in plants is necessary. In vascular tissues, this transportation in plant takes place. By a suction force, water and minerals are transported to various parts of the plant.</p><p>Vascular tissues are normally conducting tissues. Formation of these tissues can be done by xylem and phloem of a plant. Without the use of pump how water moves up the plant against gravity in tubes made of dead xylem cells can be explained by only transportation process.</p><p>The Process of Transportation</p><p>In plants, there are pipe-like vessels through which water and minerals can enter the plants. These vessels are made up of elongated cells and thick walls. A group of cells forms a tissue which performs a specialized function within the organisms. These areconducting tissues. These conducting tissues are divided into two types which are xylem and phloem.</p><p>Xylem: It is a vascular tissue that spreads from the top to bottom of the plant. For the transport of water molecules, it helps a lot. It also plays a vital role in case of dissolved substances from the root hairs to aerial parts of the plant. It transfers water in one direction.Commonly, xylem occupies the central part of the vascular bundle. It mainly includes different types of cells such as tracheid, vessels, and xylem parenchyma and xylem fibres.</p><p>Phloem: It is also a vascular tissue. In a plant where the necessity of food molecules is there, by the use of phloem transportation process will take place. Some elements are there in the phloem such as sieve elements, phloem parenchyma, fibres and companion cells.</p><p>The transportation process in this tissue is bidirectional. In association with xylem, it forms vascular bundles. The edges of vascular bundles are occupied by phloem.</p> <p>Thank you</p> | |
| 673. |
What is the source of carbon dioxide in air |
| Answer» <p>Respiration by animals and plants and burning of fuel.</p> | |
| 674. |
Carbon dioxide is taken in by plants from air through their: |
| Answer» <p>Stomata in leaves</p> | |
| 675. |
Describe an activity to show that exhaled air contains carbon dioxide. |
| Answer» <p>Take a test tube fill it with freshly prepared lime water take a straw dip it inside lime water and then exhale you will find that the lime water turns its colour to white like milky colour. This shows that the air which we exhale is carbon dioxide .</p> | |
| 676. |
6. Describe an activity to show that exhaled air contains carbon dioxide |
| Answer» <p>Take a test tube fill it with freshly prepared lime water take a straw dip it inside lime water and then exhale you will find that the lime water turns its colour to white like milky colour. This shows that the air which we exhale is carbon dioxide .</p> | |
| 677. |
Describe an activity to show that exhaled air contains catu |
| Answer» <p>(A, B and C refer to the tubes unless specified)</p><p>Close end of B. Breathe in. Air from atmosphere enters through A, passes through limewater and enters your mouth (cannot enter through B because closed).</p><p>Open end of B and close end of A. Breathe out. Exhaled air passes through limewater in test tube B and exits through B.</p><p>Limewater in test tube B (which contained the air you exhaled) turns milky much faster than in test tube A (which contained the air you inhaled).</p> | |
| 678. |
Plants use carbon dioxide from air for photosynthesis. How is the carbon dioxide in airreplaced? |
| Answer» <p>During photosynthesis, cells use carbon dioxide and radiation from the Sun to produce sugar molecules and oxygen. These sugar molecules are converted to more complex molecules such as glucose. The respiration process comes next, in which the cells use oxygen and glucose to synthesize carrier molecules that are rich in energy, such as 'Adenosine triphosphate' or ATP, and carbon dioxide is produced as a waste product. Therefore, the synthesis of glucose and its breakdown by cells are opposing processes. The entire cycle - building and breaking of carbon-based material — from carbon dioxide to complex organic molecules and returning to carbon dioxide — is part of the 'global carbon cycle'.</p> | |
| 679. |
whaf 2# рео] s |
| Answer» <p>Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e.,energyin the process of transfer from one body to another. ... For example, any given body has kineticenergyif it is in motion.</p> <p>hit like if you find it useful</p> | |
| 680. |
Classify the following solids in different categories based on the nature of intermolecular forces operating in them:Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide. |
| Answer» <p>Potassium sulphate, Zinc sulphate – Ionic solid</p><p>Benzene, urea, water, argon, ammonia – Molecular solid</p><p>Tin, rubidium – Metallic solid</p><p>Graphite, silicon carbide – Covalent solids or network solids</p> | |
| 681. |
A jet aeroplane travelling at the speed of 500 km/hrejects its products of combusion at speed of 1500km/hr relative to jet plane. What is the relativevelocity of the latter with respect to an observer onthe ground?(Ans.: 1000 km/hr) |
| Answer» <p>thanks</p> | |
| 682. |
The oz(a) chlorofluoro carbons (CFCs)(c) nitrous oxideone layer is damaging due to increasing emission of(b) sulphur dioxide(d) carbon dioxide |
| Answer» <p>due to chlorofluro carbons the ozone layer is depleting.When ultraviolet light waves (UV) strikeCFC* (CFCl3) molecules in the upper atmosphere, a carbon-chlorine bond breaks, producing a chlorine (Cl) atom. The chlorine atom then reacts with anozone(O3) molecule breaking it apart and so destroying theozone. ... A singleCFCmolecule candestroy100,000ozonemolecules.</p> | |
| 683. |
Describe various methods of Birth Control. |
| Answer» <p>Oral Contraceptives:</p><p>This is a series of pills that a woman takes once each day for a month. At the end of the month, she starts a new package of pills. The pills have hormones much like those a woman's body makes to control her menstrual cycle. They work by keeping the ovaries from releasing eggs or by changing the lining of the uterus or the mucus of the cervix.</p><p>Male Condom:</p><p>It is a sheath of latex that a man can wear over his penis during intercourse. The condom catches the semen that comes out of a man's penis before, during and after he ejaculates. This keeps his sperm from getting into the woman's vagina. Latex condoms also help protect against some infections, including HIV, the virus that causes AIDS.</p><p>Female Condom:</p><p>It is a loose-fitting sheath that fits inside the woman's vagina. It catches the semen that comes out of a man's penis when he ejaculates. It covers the cervix, the opening to the uterus, so sperm can't get through. It also protects against some infections including HIV, the virus that causes AIDS.</p> | |
| 684. |
I.How many oxygen atoms are present in 4 molecules of H3P04? |
| Answer» <p>1 molecule contains 4 atoms of Oxygen hence 4 molecules will have 4*4=16 atoms</p> | |
| 685. |
8. At STP 2 g of helium gas (molar mass = 4)occupies a volume of |
| Answer» <p>Since 1 mole of gas occupies 22.4L at stp, Volume of He: 0.500mol x 22.4 = 11.2L </p> <p>1 mole of any gas at STP occupies a volume of 22.4 litres. Mol.mass of He = 4. = 4g/mol 2g/4g/mol = 0.5 moles. = 0.5 x 22.4L = 11.2 L.</p> <p>1 mol of gas occupies 22.4L at stopvolume of He=0.500mol×22.4L =11.2L</p> | |
| 686. |
ranks,(12-12)A place receives very little rainfall and the temperature is high throughout the year,theclima |
| Answer» <p>A place receives very little rainfall and the temperature is very high throughout the year, the climate is hot and dry. </p><p>It is hot because of the high temperature and it is dry because it receives little rainfall. </p><p>Please hit the like button if this helped you</p> | |
| 687. |
3) Explanthe food cham whicth you have otsenver |
| Answer» <p>The grasshopper eats grass,thefrog eatsthe grasshopper,thesnake eatsthefrog,and the eagle eatsthesnake. There are names to help describe each link ofthe food chain. Animals that eat plants are called primary consumers or herbivores.</p> | |
| 688. |
A rectangular plot is 60 m long and 45 m broad. It has a path of width 2 m all around it on the inside. Find thea of the path and the cost of constructing it at t 125 per m2. |
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| 689. |
1. p-n Junction Diode |
| Answer» <p>ThePN junction diodeis a two terminal device, which is formed when one side of thePN junction diodeis made with p-type and doped with the N-type material. ThePN-junctionis the root for semiconductordiodes.</p> | |
| 690. |
DolineOv |
| Answer» <p>Api bond(π bond) is a covalentbond formed between two neighboring atom's unbonded p-orbitals. ... Double and triplebondsbetween atoms are usually made up of a single sigmabondand one or twopi bonds.Pi bondsare generally denoted by the Greek letterπ, in reference to the p orbital.</p> | |
| 691. |
what is doping |
| Answer» <p>Doping is the process of adding impurities to intrinsic semiconductors to alter their properties. Normally Trivalent and Pentavalent elements are used to dope Silicon and Germanium.</p> | |
| 692. |
16 If one can induce parthenocarpy through the application of growthsubstances, which fruits would you select to induce parthenocarpyand why? |
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| 693. |
A lift is tied with thick iron wire and its mass1000kg. If the maximum acceleration of the lift1.2 ms and the maximum stress of the wire is1.4x 108 Nm2 what should be the minimum diameof the wire?1) 102m 2) 10m 3)10 m4) 0.5 x10 |
| Answer» <p>1) 10^-2 m</p> | |
| 694. |
State generalized uncertainty principleDerive the uncertainty relation betweenposition and momentum operators fromthe principle.2+2-4 |
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| 695. |
Write down the uncertainty relationbetween two pairs of conjugatevariables.2 |
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| 696. |
1. An electron has a speed of500 ms) with uncertainty of 0.02%. What is the uncertainty in locatinglAns. 5-77x104m]its position ? |
| Answer» <p>Speed of the electron = v = 500 m/s.uncertainityin speed is 0.02 %∆v = 0.02 % of 500 m/s=0.02100×500= 0.1 m/sAccording to Heisenberguncertainityprinciple,</p><p>∆x.∆p≥h4πwhere∆x = uncertainity in position∆p = uncertainity in momentumh = Planck's constant = 6.63×10^-34kg m2/sto calculate∆p = m∆vm = mass of electron = 9.1×10^-31kg∆v = uncertainity in speed = 0.1 m/s∆p = m∆v =9.1×10^-31kg×0.1 m/s =9.1×10^-32kg m/s∆x.∆p≥h4π∆x≥h4π1∆p∆x≥6.63×10^−34*4×3.1419.1×10^−32= 5.8×10^-4mUncertainity in position =5.8×10^-4m</p> | |
| 697. |
What isGeography. |
| Answer» <p>Geography is the study of places and the relationships between people and their environments. Geographers explore both the physical properties of Earth's surface and the human societies spread across it. ... Geography seeks to understand where things are found, why they are there, and how they develop and change over time</p> <p>the study of the world’s surface, physical qualities, climate, population, products, etc.</p> <p>the physical arrangement of a place</p> <p>nice</p> <p>the branch which deals with study if earth and its properties</p> | |
| 698. |
14.5When a forward bias is applied to a p-n junct(a) raises the potential barrier.(b) reduces the majority carrier current to z(c) lowers the potential barrier. |
| Answer» <p>c Lowe's the potential barrier</p> | |
| 699. |
what is physiological barrier |
| Answer» <p>Physiologyis the state of human body and mind.Physiological barriersof communication occur due to the physical condition of sender or receiver which might even be physical disabilities. It includes sensory dysfunction and other physical dysfunctions.</p> <p>other definition can u give me plz </p> | |
| 700. |
Define external fertilization. Mention its disadvantages. |
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