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InterviewSolution
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.
| 59551. |
Explain the mechanism of opening and closing of stomata |
| Answer» During day guard cells become turgid due to osmosis and the stomata opens up. While at night the guard cells become flaccid due to osmosis and the stomata closes | |
| 59552. |
Describe the process of gaseous exchange in fiber ? |
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Answer» Ye bio ka hai ky can\'t understand the question |
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| 59553. |
Name the substance whose resistanc almost remain unchange by increase of temperature |
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Answer» Thanks There can be many substances whose resistance remains almost unchanged by increase of temperature. Materials such as wood and air can be the ones, which has a high electric resistance and it changes rarely with the increase in temperature. Apart from this there are some metal alloys whose resistance remains almost unchanged Any insulator material like wood etc. They have very high resistance and that rarely changes with increase in temperature. ... |
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| 59554. |
Draw the structure of neurones |
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| 59555. |
Formula of oxalic acid |
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Answer» C2H2O4 C2H2O4 C2h2o4 |
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| 59556. |
What is enzyme !? |
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Answer» Enzymes are catalysts which help in the digestion of fats, proteins ,carbohydrates etc. They are biocatalyst which help us to faster the digestion Enzymes are help to digestion |
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| 59557. |
What are the two main function of pancreas? |
| Answer» The main function of the pancreas is to secrete pancreatic enzymes such as trypsin which helps in breakdown of protein into amino acid the second one is pancreatic amylase breaks down starch into glucose and the third one is lipase it breaks down oils and fat into fatty acid and glycerol | |
| 59558. |
What is electric genreter |
| Answer» In electricity generation, a generator is a device that converts motive power (mechanical energy) into electrical power for use in an external circuit. | |
| 59559. |
What is the largest organ which is present in our body. |
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Answer» Liver Livet The Largest internal organ is liver which is present in our body. The largest external organ is skin which is also present in our body |
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| 59560. |
Compound like alcohol and glucose do not show acidic behaviour although they contain hydrogen |
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Answer» Compounds like alcohol and Glucose donot dissociates in water to produce hydrogen ions . That is why , they donot show acidic behaviour although they contain hydrogen . HCl, {tex}HNO_3{/tex}, etc., ionise in the aqueous solution to produce {tex}H^+{/tex} ions. Hence, they show acidic character. Compounds like {tex}C_2H_5OH{/tex} and glucose do not ionise in the aqueous solution to give {tex}H^+{/tex}ions, i.e., hydrogen present in them is non-ionisable. Hence, they do not show acidic character. |
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| 59561. |
Write the result/observations of all the activities in life processes and control and cordination |
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| 59562. |
Why do humans die |
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Answer» Bai jo is duniya m aaya h usse jana to hhhh .to that\'s why human die .....???? Bye |
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| 59563. |
What is exothermic reaction?give example |
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Answer» This reaction are release heat.Cao+H2o:Ca(OH)+2H20 The reaction in which heat is released is called exothermic reactionExothermic reaction is generally combination reactionExample:-burning of fossil fuelsCH4+O2:-CO2+H2O+HEAT The reaction in which heat is evolved is called an exothermic reactionCaO+H2O==>Ca(OH) 2+heat called* Reactions which take place with the evolution of heat ( increase of temperature ) are caled exothermic reactions. For example, burning of natural gas:- CH4(g)+2O2(g)→CO2(g)+2H2O(g)+Heat |
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| 59564. |
When a sports man run he often gets cramps on muscles. Why? |
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Answer» Muscle cramps occur when a muscle doesn\'t relax after contraction.It sometimes causes pain in muscles.It is generally caused by electrolytic imbalance.Sodium ions lack when we exercise and a build up of lactate acid also starts when a muscle generally tightens and shortens.This leads to muscle cramps. Because lack of oxygen |
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| 59565. |
Why respiration is exothermic reaction??? |
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Answer» For the sustenance of life we require energy. We obtain this energy from our food. In the process of digestion, food molecules get converted into simpler substances such as, glucose. Then glucose combine with oxygen and provide energy to our body. The whole process is known as respiration. As because, energy is released during the process of respiration, so it is considered an exothermic reaction. For example,C6H12O6 + 6O2→ 6CO2 + 6H2O + energy Respiration is exothermic as it produce energy in form of ATP by breaking glucose with help of oxygen. |
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| 59566. |
What is light what is nature of light |
| Answer» Light is a form of energy by which one is enabled to see through reflection.The nature of light is electromagnetive and spectrum.Light is also a transverse wave that can be seen by human or living beings. | |
| 59567. |
What is chlor-alkali process and explain it |
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Answer» The electrolysis of a concentrated solution of sodium chloride is known as chlor-alkali process\xa0because of the products formed -\xa0chlor for chlorine and alkali for sodium hydroxide.\xa0The\xa0chlor-alkali process\xa0is an industrial\xa0process\xa0for the electrolysis of NaCl and\xa0is used to produce\xa0chlorine\xa0and sodium hydroxide (lye/caustic soda), which are commodity chemicals. Thank u |
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| 59568. |
Why balance are important |
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| 59569. |
Mention any two factors on which the resistance of a cylindrical conductor depends. |
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Answer» Resistance R of a conductor depends upon length and area A of conductor. It has been experimentally confirmed that:R ∝ l, the lenth of the wireR ∝ {tex}\\frac1A{/tex}, where A is the area cross-section of the wireCombining above, we have: R ∝\xa0{tex}\\frac lA{/tex} or R = {tex}\\rho \\frac1A{/tex}where{tex}\\rho{/tex} is a constant called specific resistance or electric resistivity of the material of the conductor.If l = 1, A = 1, {tex}\\rho{/tex} = R.i.e. specific resistance (or electric resistivity) of a conductor is the resistance of a wire of unit length and a unit area cross-section. It may be defined as:Specific resistance of a conductor is the resistance of unit cube of the conductor.Unit of {tex}\\rho{/tex} :{tex}\\rho=\\;\\frac{RA}l=\\;\\frac{ohm\\;m^2}m=\\;ohm\\;m.{/tex} Thnks |
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| 59570. |
Practice at least five examples of decomposition reaction |
| Answer» 2KClO3- 2KCl+3O22H2O-2H2+O22NaCl-2Na+Cl22AgBr-2Ag+Br2CaCO3-CaO+CO2 | |
| 59571. |
A muscle that controls flow of urine |
| Answer» urethral sphincter and the internal urethral sphincter | |
| 59572. |
What is accomodation |
| Answer» The power of the ciliary muscles to change the focal length of the eye lens. | |
| 59573. |
What happened when iron nail is dopped in copper sulphate solutions? |
| Answer» Iron nail combines with copper sulphate solution and forms a new compound called iron sulphate and copper settles down and forms precipitate. | |
| 59574. |
Why cramps are caused in our muscles during sudden activity? |
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Answer» Due to lack of oxygen and production of lactic acid nd it accumulates there... Since the muscles get insufficient oxygen and there is accumulation of lactic acid which causes muscle fatigue after rigours exercise. Lack of oxygen |
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| 59575. |
Give difference between atoms and ions |
| Answer» An ion is a particle or collection of particles with a net positive or negative charge. An atom is the basic unit of an element. The identity of an element is determined by the number of protons in the atom s nucleus. Stable atom contains the same number of electron and proton and no net charge. | |
| 59576. |
Veins get blood from _____ |
| Answer» veins carry deoxygenated blood from the tissues back to the heart | |
| 59577. |
How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal |
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Answer» ACID + METAL ---> SALT + H²When hcl reacts with metal hydrogen gas is released for test h² gas bring a lighted match stick near the gas it burns with a pop up sounf By bringing a lighted candle near the the evolved gas |
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| 59578. |
Is reflex action is only function of spinal cord? |
| Answer» Tatti khale | |
| 59579. |
How can i better understand physics?I get confused as i go some deep in it.? |
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Answer» Read Ncert .it is to the point. By solving more nd more numericals... U should know to relate physics to yr surroundings...ND THE MOST IMPORTANT THING IZZZ.... BE PERFECT IN UR BASICS....U WILL DEFINITELY THEN NVR FIND PHYSICS DIFFICULT... ????? Me too in electricity ??? |
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| 59580. |
Why should the resistance of:a) an ammeter be very small ?b) a voltmeter be very large ? |
| Answer» An\xa0ammeter\xa0has to measure to current flowing through the circuit. Resistance offers an obstruction to the current flow. So, if the resistance of an ammeter is large , the current measured by the ammeter will be quite less as compared to the actual amount of current flowing through the circuit which is undesirable. If ammeter has\xa0zero resistance\xa0, then it will give the exact value of current. But this is not practically possible because every material has some value of\xa0internal resistance\xa0which we can\'t control. For this reason , ammeter must have small resistance.Voltmeters\xa0are put in parallel with the load in order to measure the\xa0potential difference between two *different* points. If they are in parallel with the load, then at the first junction the current will split and flow into both paths (Kirchhoff\'s Laws). However, if current is flowing through the voltmeter, then it is not all flowing through the load, and the potential difference across the load would change when the voltmeter is added and removed. This is unfavourable. Therefore, the voltmeter must have a very high resistance so that current doesn\'t flow through it. | |
| 59581. |
How to draw lens |
| Answer» By pencil | |
| 59582. |
Why air is not filled in electric bulb ? |
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Answer» Air is not filled in electric bulb because the filament, which becomes extremely hot when the light is on, would rapidly oxidize and burn out, since air is mixture of different gases, in oxygen is one of them and oxygen supports burning and oxidation. Oxygen is good condoctor of heat and when tenstent fillament produce heat this air will allow to burn bulb Bcoz it might lead to ?...cause air is a good conductor of heat. |
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| 59583. |
Give some examples of reduction reaction |
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Answer» Cu + H²o ----> cuo + h² Copper oxide CuO reacts with hydrogen H to form copper Cu and water H2O |
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| 59584. |
name the conducting tissue present in plants |
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Answer» Xylem and phloem Xylem and Phloem |
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| 59585. |
What happened when an acid react with a metal?give chemical equation of the reaction involved |
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Answer» Acid+metal= salt + H²2Hcl+2Na= 2Nacl+ H² (a) When an acid reacts with a metal, then a salt and hydrogen gas are formed. |
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| 59586. |
Describe an activity to show that magnetic field is generated around straight current carrying wire |
| Answer» (a) Take a battery (12V), a variable resistance, an ammeter (0 - 5A), a plug key and a long straight thick copper wire.\xa0(b) Insert the thick wire through the centre, normal to the plane of a rectangular cardboard.\xa0(c) Connect the copper wire vertically between X and Y as shown in series with battery, a plug key and a rheostat.\xa0(d) Sprinkle some iron filings uniformly on the cardboard.(e) Keep the variable of the rheostat at a fixed position and note the current through the ammeter.\xa0(f) Close the key so that a current flows through the wire. Gently tap the cardboard a few times. Observe the pattern of the iron filings.\xa0\xa0(ii) To find the direction of magnetic field lines, place a compass at a point P over a circle and observe the direction of the needle. The direction of north pole of the compass would give the direction of magnetic field lines. Maxwell\'s Right Hand Thumb Rule is used to find the direction of magnetic field lines. It states that "Imagine you are holding a current carrying conductor in your right hand such that the thumb\xa0points in the direction of current. Then your fingers will wrap around the conductor in the direction of the magnetic field lines." | |
| 59587. |
Differences between real and virtual image? |
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Answer» \tReal imageVirtual image(i) It can be taken on the screen.(i) It cannot be taken on the screen.(ii) It is formed by actual intersection of two rays.(ii) There is no actual intersection of two rays.(iii) It is always inverted.(iii) It is always erect.(iv) It is on the same side of the mirror as the object(iv) It is always formed behind the mirror.(v) Size of image depends on the distance of object from the mirror(v) Size of image varies according to the mirror used. Image is of same size in plane mirror, large in concave mirror and smaller in convex mirror.\t *real images can be taken on screen whereas virtual cannot...* real images are always inverted whereas virtual are erect...*real images are formed on same side of mirror whereas virtual images are always formed behind the mirror!! Real image:-The image formed by actual intersection of light rays after reflection or refraction of light.Virtual image:-The image formed by drawn the light rays backword that meet at a point is called virtual image |
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| 59588. |
Human alimentary canal flow chart |
| Answer» See in GoogleWHY FEAR WHEN GOOGLE IS THERE WITH YOU? | |
| 59589. |
Table 2.2 in acid bases and salts |
| Answer» From NCERT?? | |
| 59590. |
What is the amout of blood in human body |
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Answer» Unlimited Full Amount |
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| 59591. |
How many litres of blood is present in body |
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Answer» 7 to 8 litres Approx 4 to 5.2 litres 5L approx Search on google instead of here |
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| 59592. |
Write main function of blood in our body |
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Answer» It has carries nitrogenous waste carbon dioxide oxygen hormones and maintains the body temperature Transportation It helps the oxygen to carry oxygenated blood and deoxygenated blood to our all organs It helps in transportation of essential things in our body.for example : O2 Co2 |
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| 59593. |
What is ampere unit bt a cetain answer |
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| 59594. |
What is sa node |
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Answer» Sino atrial node regulates the expansion & contraction of heart during breathing . The SA node (SA stands for sinoatrial) is one of the major elements in the cardiac conduction system, the system that controls the heart rate. |
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| 59595. |
Why is blood circulation in human heart called double circulation? |
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Answer» In mammals and birds the blood goes through the heart twice during each cardiac cycle. This is known as double circulation.Deoxygenated blood which enters right auricle and then it enters the right ventricle from where it is pumped to lungs for oxygenation. From lungs after oxygenation it comes to left auricle and then enters left ventricle from where it is pumped to various parts of body.Such system of circulation does not allow mixing of oxygenated and deoxygenated blood which allows efficient supply of oxygen to the body. The blood circulation in human heart is called double circulation because the blood passes through the heart twice in one complete cycle of the body – once through the right half in the form of deoxygenated blood and once through the left half in the form of oxygenated blood. |
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| 59596. |
Write the name give to basis that are highly soluble in water? |
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Answer» Alkalis The bases which are soluble in water are called alkalis. Alkalis |
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| 59597. |
What do you mean by emulsification?Give its significance. |
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Answer» Emulsification means broken down of complex molecules into simpler piece.The process by which complex molecules of is broken down into simpler piece knows emulsification of fat The process by which the large fat molecules are breakdown in to small particle in the presence of bile juice which is secreted from liver. A process in which big size fat globules are broken dowm into small size fat globules by bile juice |
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| 59598. |
What is Borex? |
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Answer» Borax is the product of sodium carbonate which is use in bomb Borax is a substance made of glass Borax is visportak substance if u can making a bomb fill borax in it |
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| 59599. |
What is emulsified fat ? |
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Answer» Emulsified fats are the fat particals that are breaken down into smaller particles with the help of some special enzymes called lypase The fat which gets emulsified (broken into simpler globules) by the action of bile juice in small intestine is called emulsified fat. |
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| 59600. |
How to prepare science for exams.?? |
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Answer» Chemistry prepare from s.chand book and physics also from s.chand but biology from ncert textbook You should stick to your ncert book it is a Bible for cbse exams Your Concepts must be cleared if you have not enough time to read all the chapters thoroughly then selfstudy of evergreen is best for all types of questions including 1 mark 2 mark 4 ,5 etc otherwise everything thing is available in google you should take help of it also But you must have to do efforts yourself also??? Nd best book also ... |
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