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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.
| 2751. |
what is irrigation ? |
| Answer» <p>Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall</p> <p>Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall.</p> <p>Irrigationis the application of controlled amounts of water to plants at needed intervals.Irrigationhelps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall.</p> <p>Irrigationis the application of controlled amounts of water to plants at needed intervals.It helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall.</p> <p>Irrigation is the application of controlled amount of water to plants at needed intervals.</p> <p>Irrigation is basically the process of watering plants. </p> | |
| 2752. |
Name the planet closest to the Sun. |
| Answer» <p>Mercury is closest to the Sun</p> <p>mercury is the closest planet to the sun</p> | |
| 2753. |
A magnetic instrument used to find directions |
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| 2754. |
1. Why does an athlete breathe faster and deeper thanfinishing the race? |
| Answer» <p>Thank you</p> | |
| 2755. |
Exercises1 Why does an athlete breathe faster and deeper thanhin the race? |
| Answer» <p>When the athlete runs in the race, our body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It seeds us the breakdown of food and more energy is released.</p><p>my answer is correct according </p> <p>When an athelete runs , she needs more oxygen to breathe . Therefore, an athlete breathes faster to get more oxygen</p> | |
| 2756. |
4. a) Explain the working principle of single phase transformer? |
| Answer» <p>Ans:-</p><p>Transformer is electromagnetic static electrical equipment (with no moving parts) which transforms magnetic energy to electrical energy. It consists of a magnetic iron core serving as a magnetic transformer part and transformer cooper winding serving as electrical part. The transformer is high-efficiency equipment, and its losses are very low because there isn’t any mechanical friction inside. Transformers are used in almost all electrical systems from low voltage up to the highest voltage level. It operates only with alternating current (AC), because the direct current (DC) does not create any electromagnetic induction. Depending on the electrical network where the transformer is installed, there are two transformer types, three-phase transformers and single phase transformers. The operation principle of the single-phase transformer is: the AC voltage source injects the AC current through the transformer primary winding.</p><p>The AC current generates the alternating electromagnetic field. The magnetic field lines are moving through iron transformer core and comprise the transformer secondary circuit. Thus the voltage is induced in the secondary winding with the same frequency as the voltage of the primary side. The induced voltage value is determine by Faraday’s Law. </p> <p>l WANT another question </p> <p>THANKS </p> | |
| 2757. |
what is mitochondria?explain with diagram |
| Answer» <p>Mitochondria are known as the powerhouses of the cell. They areorganellesthat act like adigestive systemwhich takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known ascellular respiration. Many of the reactions involved in cellular respiration happen in the mitochondria. Mitochondria are the working organelles that keep the cell full of energy.</p><p>Mitochondria are small organelles floating free throughout the cell. Some cells have several thousand mitochondria while others have none.Muscle cellsneed a lot of energy so they have loads of mitochondria. Neurons (cells that transmit nerve impulses) don’t need as many. If a cell feels it is not getting enough energy to survive, more mitochondria can be created. Sometimes a mitochondria can grow larger or combine with other mitochondria. It all depends on the needs of the cell.</p> <p>Mitochondria structure :</p><p>Mitochondria are shaped perfectly to maximize their productivity. They are made of two membranes. The outer membranecovers the organelle and contains it like a skin. Theinner membranefolds over many times and creates layered structures called cristae. The fluid contained in the mitochondria is called thematrix.</p><p>The folding of the inner membrane increases the surface area inside the organelle. Since many of the chemical reactions happen on the inner membrane, the increased surface area creates more space for reactions to occur. If you have more space to work, you can get more work done. Similar surface area strategies are used by microvilliin your intestines.</p><p>What’s in the matrix? It's not like the movies at all. Mitochondria are special because they have their ownribosomesand DNA floating in the matrix. There are also structures calledgranules which may control concentrations of ions. Cell biologists are still exploring the activity of granules.</p> | |
| 2758. |
Define adolescence |
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| 2759. |
refraction define |
| Answer» <p>Refraction of light is the change in direction of a light ray when it travels from one medium to another.</p> | |
| 2760. |
what is refraction |
| Answer» <p>whenever ray of light goes from one medium to another then it deviate from its original path is callled refrection </p> | |
| 2761. |
Deine |
| Answer» <p>Surface tension is the elastic tendency of a fluid surface which makes it acquire the least surface area possible.</p><p>Factors affecting :</p><p># Viscosity</p><p># The surface tension of a liquid decreases with increase in temperature.</p><p># when charge is given to a soap bubble, its size increases surface tension of liquid decreases due to electrification.</p><p># surface tension decreases when partially soluble impurities either on the surface or dissolved in it. Such as:- soap, detergent, phenol etc. are added in water.</p><p># surface tension increases when highly soluble impurities such as salt is added in water.</p><p># At boiling point surface tension of liquid becomes zero at freezing point it becomes maximum.</p> | |
| 2762. |
How computer is useful to us |
| Answer» <p>Computers are used to control large and small machines which in the past were controlled by humans. They are also in homes, where they are used for things such as listening to music, reading the news and writing. Modern computers are electronic computer hardware.</p> <p> Computers make life easier for human beings in various ways. They allow people to reconnect with friends they haven't seen in decades and to watch television shows that they may have missed during the week. People are even able to complete a college degree or work from home solely depending on computers.</p> <p>Acomputeris amachine that accepts data as input, process that data using programs, and output the processed data. Many computers can store and retrieve information using hard drives. Computers can be connected together to form networks, allowing connected computers to communicate with each other.Modern computers can do billions of calculations per second. Computers do many different jobs whereautomation is useful. Some examples are controllingtraffic lights,vehicle computers, security systems,washing machines and digital televisions.Computers can be designed to do almost anything with information. Computers are used to control large and small machines which in the past were controlled by humans. Most people have used apersonal computer in their home or at work. They are used for things such as listening to music, reading thenews and writing.Modern computers are electroniccomputer hardware. They do mathematicalarithmetic very quickly. They follow the instructions in their software programs. Thesoftware uses the hardware when the user gives it instructions, and gives useful output.Humans control computers withuser interfaces.Input devices includekeyboards,computer mice, buttons, andtouch screens. Some computers can also be controlled with voice commands, hand gestures or even brain signals through electrodes implanted in the brain or along nerves.</p> | |
| 2763. |
functions of carbohydrates and proteins in our body and their products |
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| 2764. |
4. What property of silk makes it so attractive? |
| Answer» <p>Silk is durable fabric has lustre and can be worn in both summer and winter . These property of silk make it attractivesilk threads are triangular prism like structure.They refract the light that falls on them.</p> <p>The lustrous appearance of silk makes it attractive.</p> | |
| 2765. |
SkEnergyCarbohydrates -ProteinVitaminMineralFibre |
| Answer» <p>these are necessary nutrition for our body</p> | |
| 2766. |
8. You are given an iron strip. How will you make it into a magnet?9. How is a compass used to find directions?10. A magnet was brought from different directions towards a toy boat that has34 |
| Answer» <p>This works because the Earth itself has a magnetic field which is similar to that of a bar magnet (seethe picture below). Thecompassneedle aligns with the Earth's magnetic fielddirectionand points north-south.</p> | |
| 2767. |
ATOMIC SYMBOLS |
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| 2768. |
1. By looking at a plant externally can you tell whether a plant is C, or C,? Why andhow? |
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| 2769. |
photosynthesisLet's Answer themName the types of biotic components.Where is chlorophyll present in plants?What foods do the decomposers get?Name one scavenger. |
| Answer» <p>Biotic components are the living things that shape an ecosystem. Examples of biotic components include animals, plants, fungi, and bacteria.</p> | |
| 2770. |
. Crow is an omnivore or a scavenger. Justify |
| Answer» <p>The living organism who eats both plants and animals are known as omnivores.Scavenger is one who eats dead body.Crow is omnivorous animal as well as Scavenger because crow also eat dead bodies of other animals.</p> | |
| 2771. |
Crow is an omnivore or a scavenger. Justify. |
| Answer» <p>Crowisomnivorousanimal as well asScavengerbecausecrowalso eat dead bodies of other animals</p> | |
| 2772. |
Massm is released from point A as shown in figurethen tension in the string at the point B will be-RPMT 2007, 0834.' mg(A) mg(C) 3mg(B) 2mg(D) 4mgller coaster is designed such that riders |
| Answer» <p>the Velocity gained by the mass at point p is</p><p>=> mgl = 1/2*(m)*(v²)=> v = √2gl</p><p>now, force balance at point B, gives </p><p>=> mg -T = mv²/l=> T = mg - (m*2gl/l)=> T = -mg </p><p>so, the value of Tension is mg .</p> | |
| 2773. |
Answer in one word (Type of Change):-Melting of ice isCurding of milk isPollution isSwitching on the fan is |
| Answer» <p>reversible changeirreversible(chemical)changechemical change</p> | |
| 2774. |
. The layer of air around the earth is known as ........ The component of air used by green plants to make their food, is ........ List five activities that are possible due to the presence of air. |
| Answer» <p>1.The layer of air around the earth is known as atmosphere.2. The component of air used by green plants to make their food is CO23. Activities are possible due to presence of air are1. Breathing2. plants life.3. Burning something.4.Winnowing 5.Flying kite</p><p>A ship moving because of sail</p> | |
| 2775. |
ercises1. To walk through a waterlogged area. you usually shorten the length of yourdress by folding it. Can this change be reversed? |
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| 2776. |
what is biological process |
| Answer» <p>Biological processes are the processes vital for a living organism to live. Biological processes are made up of many chemical reactions or other events that are involved in the persistence and transformation of life forms. Examples are Metabolism and homeostasis. </p> | |
| 2777. |
.Two identical slabs, of a given metal, are joined together, in two different ways, as shown in figures(a) and (b). What is the ratio of the resistances of these two combinations? |
| Answer» <p>please send diagram related to the question.</p> | |
| 2778. |
List five activities that are possible due to presence of air. |
| Answer» <p>The activities that are possible due to the presence of air, are:(a) To make a simple firki(b) To make a weather cock(c) To breathe for survival(d) For burning of substance(e) For photosynthesis</p> | |
| 2779. |
Name any five products obtained from petrole |
| Answer» <p>We get several products from petroleum refining major of them are fuels like petrol, diesel and kerosene. Also, other products like paraffins, mineral oil.</p> | |
| 2780. |
6. List five products we get from forests? |
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| 2781. |
G.Name any five products obtained from petroleum. |
| Answer» <p>We get several products from petroleum refining major of them are fuels like petrol, diesel and kerosene. Also, other products like paraffins, mineral oil.</p> | |
| 2782. |
12.13.Ifaplant has tap root, what type ofvenation will be present in its leaves?Name the different parts of a flower from outside to the center. |
| Answer» <p>Plants withreticulatevenation intheir leavesare likely tohave tap roots. For example, a carrot or a rose plant has leaves withreticulate venationandits rootsare calledtap roots. Intap roots, thereisone main rootknown asthe'tap root' that grows straight down fromthestem.</p> | |
| 2783. |
. Write an essdy Tur gName the endocrine glands in our body. Name the hormone secreted by them and their working, |
| Answer» <p>Thyroid gland. It produce thyroxine hormone</p> | |
| 2784. |
what is optical fiber |
| Answer» <p>A thin flexible fibre with a glass core through which light signals can be sent with very little loss of strength.</p> | |
| 2785. |
Long fiber of a neuron |
| Answer» <p>A typicalneuronhas a cell body containing a nucleus and two or morelong fibres. Impulses are carried along one or more of thesefibres, called dendrites, to the cell body; in higher nervous systems, only one fibre, the axon, carries the impulse away from the cell body.</p> | |
| 2786. |
Give reason for your choice.(a) What is the general formula of alkenes? Identify the alkenes from the following:C2H6,C2H4,C3H4,C2H2,C3H6(b) Which of the following can give addition reactions?C2H6,C3H8,C3H6, C2H2,CH4 |
| Answer» <p>a)CnH2n+2 is the general formula for alkaneC2H6b)addition reaction is given by alkeneshence C3H6 will give addition reaction.</p> | |
| 2787. |
Name the hormones secreted by the following endocrine glands and specify onefunction of each:(a) Thyroid (b) Pituitary (c) Pancreas |
| Answer» <p>Thyroid hormones are two hormones produced and released by the thyroid gland, namely triiodothyronine and thyroxine. They are tyrosine-based hormones that are primarily responsible for regulation of metabolism.</p> <p>Hormones Secreted by Anterior Pituitary: Adrenocorticotropic hormone (ACTH) Thyroid Stimulating Hormone (TSH) Follicle Stimulating Hormone (FSH) Lutenizing Hormone (LH) Growth Hormone (GH) Prolactin. Beta-Endorphin.</p> <p> Insulin :Regulates sugar metabolism, maintain blood sugar level.</p><p> Glucagon :Increases blood sugar level.</p> | |
| 2788. |
pteridophytes define |
| Answer» <p>Pteridophytes definationThese plants are the ones that do not have any flowers or seeds. Hence they are also called as Cryptogams. They include ferns and horsetails. In fact, they can be considered as the first terrestrial vascular plants, showing the presence of the vascular tissue, xylem, and phloem. They can be found in mostly in damp and shady places. Most ferns are grown as ornamental plants</p> | |
| 2789. |
__________ is stored as the food synthesized in plants. |
| Answer» <p>starch </p> | |
| 2790. |
what is inheritance in java |
| Answer» <p>Ans :- Inheritanceis a mechanism wherein a new class is derived from an existing class. InJava, classes mayinheritor acquire the properties and methods of other classes. A class derived from another class is called a subclass, whereas the class from which a subclass is derived is called a superclass.</p> | |
| 2791. |
showquestion.31 What is an 'esterification' reaction? Describe an activity toesterification. |
| Answer» <p>Esterification Reaction:</p><p>When an alcohol ( mostly primary) alcohol is treated with carboxylic acid in the presence of H2 SO4 sweet smelling compound is formed which is called ester. The reaction is know asesterificationreaction.</p><p>CH3 COOH + CH3 CH2 COOH ====> CH3COOCH2CH3</p> <p>Easterification: Carboxylic acids -> esters The coversion is carried out using acid and alcohols. This is called the Fischer Esterification.</p><p>C2H5OH + CH3COOH --> CH3COOC2H5 + H2O </p><p>Activity: A few drops of H2So4 is added to ethanol and glacial acetic acid. They are placed in a warm water bath for at least five minutes and the contents are poured into a beaker containing water. Observe the resulting mixture. The odor is sweet and the substance formed is Ethyl acetate. This reaction is called esterification reaction.</p> | |
| 2792. |
litSalhhhak |
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| 2793. |
5.Flowers pollinated byare brightly coloured and scented. |
| Answer» <p>Flowers pollinated by insects are brightly coloured and scented.</p> <p>Answer is insects.In order to attractinsects,insect-pollinated flowersare oftenbrightly coloured, have scent and nectar so that theinsectcomes into theflowerand collects or leaves pollen.</p> | |
| 2794. |
MetallicSolids |
| Answer» <p>Metallic solids are solids composed of metal atoms that are held together by metallic bonds. The constituent units of metallic solids are positive ions. These bonds are like huge molecular orbitals that span across the whole solid. This means the electrons in metallic solids are delocalized.</p> | |
| 2795. |
12. 'Avoid plastics as far as possible. Comment on this advice |
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| 2796. |
Q.1 Copper metal is a(a) Good conductor of heat(b) Highly magnetic material(c) Translucent mat(d) Omamental metal |
| Answer» <p>option aCopperis ametalmade up ofcopperatoms closely packed together. ... The electrons can move freely through themetal. For this reason, they are known as free electrons. They are also known as conduction electrons, because they helpcopperto be agood conductor of heatand electricity.</p> | |
| 2797. |
the face appears magnified when the backside of a polished spoon is held close to it. true/false |
| Answer» <p>True</p> <p>true</p> | |
| 2798. |
8. Why should we worry about the conditions and issues related to forefar from us? |
| Answer» <p>There are various reasons for which we should be vigilant about matters related to forests. (i)A decrease in forest area would lead to an increase in carbon dioxide in air. This will lead to an increase of earth’s temperature. (ii) Soil erosion would occur if there are no forests. (iii)Floods would be more frequent in areas where forest are more.</p> | |
| 2799. |
FrogWebbedfoof |
| Answer» <p>Question you have submitted is incomplete. Please post a complete question.</p> <p>Webbed feetcome in handy for swimming quickly through the water. Crocodiles and alligatorshave webbedbackfeet. ... Similarly, aquaticfrogs, which live in water,have webbed feet, butfrogsthat live on land, such as treefrogs, don'thave webbed feetbecause they don't need them.</p> <p>you are dumb</p> | |
| 2800. |
Project IdeasTO to find out the history of the discovery of photosynthesis and biography of the discoverer of photosynthesis. Paste theinformation in your scrapbook.which denend nn human being for their food requirement. List up some of the |
| Answer» <p>Jan Ingenhousz also contributed to thediscovery of photosynthesis. He was a Dutch chemist, biologist and physiologist who performed important experiments in the late 1770s that proved that plants produce oxygen. ... He noticed that small bubbles were produced by the plants when they were in the sunlight.</p> <p>Jan Ingenhousz is the thediscovery of photosynthesis. He was a Dutch chemist, biologist and physiologist who performed important experiments in the late 1770s that proved that plants produce oxygen. ... He noticed that small bubbles were produced by the plants when they were in the sunlight.</p> <p>jan ingenhousz discover photosynthesis</p> | |