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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.
| 59451. |
Name the two constituent of baking powder |
| Answer» Baking soda and tartaric acid.. | |
| 59452. |
When we add acid into water then it blast why it blast |
| Answer» No, if we add water to acid then it will blast bcz the process of adding water to an acid is exothermic( releases heat)...bt if we add acid to water, the mixture will not blast, bt we should add it with constant stiring of the mixture...!! | |
| 59453. |
In which form do the most of plants absorb nitrogen? |
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Answer» In the foam of nitrate In form of nitrates plants fulfil their need of nitrogen |
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| 59454. |
Why does dry HCL does not change the colour of the dry litmus paper? |
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Answer» Lack of ions Due to lack of ions in it. |
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| 59455. |
Chlor alkali process???? |
| Answer» The chloralkali process (also chlor-alkali and chlor alkali) is an industrial process for the electrolysis of NaCl. It is the technology used to produce chlorine and sodium hydroxide(lye/caustic soda), which are commodity chemicals required by industry. | |
| 59456. |
Digestion of carbohydrate |
| Answer» The goal of carbohydrate digestion is to break down all disaccharides and complex carbohydrates into monosaccharides for absorption, although not all are completely absorbed in the small intestine (e.g., fiber). Digestion begins in the mouth with salivary amylase released during the process of chewing. | |
| 59457. |
What is the role of appendix |
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Answer» The function of the appendix is unknown. One theory is that the appendix acts as a storehouse for good bacteria, “rebooting” the digestive system after diarrheal illnesses. Other experts believe the appendix is just a useless remnant from our evolutionary past.Feb 18, 2017 The function of the appendix is unknown. One theory is that the appendix acts as a storehouse for good bacteria, “rebooting” the digestive system after diarrheal illnesses. Other experts believe the appendix is just a useless remnant from our evolutionary past. |
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| 59458. |
All chapter of chemistry have included marks |
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Answer» Yes You can check the syllabus here :\xa0https://mycbseguide.com/cbse-syllabus.html |
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| 59459. |
What do you mean by sustain and survival of life? |
| Answer» Life sustaining means\xa0helping someone or something to stay aliveSurvival of life, outlive refer to remaining alive longer than someone else or after some event.\xa0Survive\xa0usually\xa0means\xa0to succeed in keeping alive against odds, to live after some event that has threatened one: to\xa0survive\xa0an automobile accident. | |
| 59460. |
Define joule\'s law. |
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Answer» Joule\'s Law of Heating states that the amount of heat produced in a conductor is directly proportional to the square of current passing through it, directly proportional to the resistance of the conductor, directly proportional to the time for which current passed i.e |
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| 59461. |
What is electric power? |
| Answer» Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries.Practical unit of power is watt and that of electric energy is kWh(kilo watt hour). | |
| 59462. |
How plants use their synthesised food? |
| Answer» Photosynthesis is an autotrophic mode of nutrition exhibited by most of the green plants and some bacteria.Photosynthesis is the physico-chemical process by which plants can convert light energy into chemical energy, in the form of food using atmospheric carbon dioxide and water as raw materials. Photosynthesis involves a series of photochemical reactions in two phases - Light reactions and Dark reactions.*Sunlight, chlorophyll, carbon dioxide and water are necessary factors for photosynthesis.*Leaves are called as food factories as they contain structures like chloroplasts and stomata on them.*Stomata are tiny pores on the surface of the leaves. Stomata help in exchange of gases. The opening and closing of stomata are brought about by guard cells.\xa0*The chloroplasts are the structures responsible for trapping the sunlight.\xa0*Plants synthesize glucose using carbon dioxide and water in the presence of sunlight.*Oxygen and water are released as by-products through the stomata during daytime.*The food synthesized is transported to other parts of the plant. Glucose is a carbohydrate. Glucose synthesized by the process of photosynthesis is then converted into complex compounds like starch and cellulose. Starch is stored in different parts of the plant.\xa0 | |
| 59463. |
Where are plastids present and why |
| Answer» Plastids are present only in plant cell.It is depends on chlorophyll as a colour pigment and storage of food . So, plastids are only present in plant cell. | |
| 59464. |
Define electric resistance of a conductor |
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Answer» Resistance is defined as the property of a conductor to resist the flow of charges through it. The resistance of conductor is numerically given as the ratio of potential difference across its length to the current flowing through it. The obstruction caused for the flow of the elcetric charge is the electric circuit is called its electric resistance.We know that electric resistance is directly proportional to the length and inversely proportional to the area of the wire, if the length is doubled resisatace will be doubled but again it is halved so double of the previous resistance will be halved further. That is 2R/2= R. So, There will be no change in the net resistance If both the length and athe area are doubled.Resistivity does not change with area and length because it is the property of the material . |
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| 59465. |
which metal is the best reflector of light? |
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Answer» Copper Silver |
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| 59466. |
Two charged bodies having equal potential are connected through a conducting wire , in this case |
| Answer» Current will not flow | |
| 59467. |
Properties of concave and convex mirror |
| Answer» Properties of Concave mirrors:?converging mirrors.?mirrors which can produce real,inverted,virtual and erect(upright) images.?mirrors which can produce enlarged virtual image.?These mirrors are used as shaving mirrors,headlights of vehicles,solar furnaces to concentrate the heat(?) energy at a single point?.Properties of convex mirrors:?Diverging mirrors?mirrors which can produce only virtual and erect(upright) images.?mirrors which can produce diminished virtual image.?These mirrors are used as rear-view(side-view)mirrors of vehicles. | |
| 59468. |
How does amoeba obtain its food and by which process? |
| Answer» By the process of endocytosis form pseudopodia | |
| 59469. |
Definition of paracitic nutrition |
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Answer» Thanx? Parasitic nutrition = The mode of nutrition in which living organism derive nutrition from another living organism by being dependent on it for food an shelter.(1) those organism which derive nutrition is called host and one which it is dependent parasite.(2) the parasite is it totally gain and the host is it complete loss. Example : e-coil bacteria. It is found in our small intestine Parasitic nutrition is a mode of heterotrophic nutrition where a parasitic organism live on the body surface or inside the body of another type of organism and get nutrition directly from the body without kill it. |
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| 59470. |
what is the advantage of having four chambered heart |
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Answer» Its double circulation. Hamari body complex h energy ki jyada jaroorat hoti h isliye firstly fastily respiration.............MAY BE It allows us to send our dirty blood to the cleaners - the lungs and our clean blood to the rest of the body without having to mix the two. The double respiration |
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| 59471. |
Application of joule\'s heating effect in our daily life |
| Answer» \tThe Electric Bulb: The filament bulb is such that the inner core filament (mostly tungsten as it does not melt easily) is heated up to a certain temperature after which it is illuminated.\tThe Electric Iron: Bimetallic plates and applying the heating effect of current helps the iron break the flow of electricity when a certain temperature is reached. you may have noticed this when the red light on an iron box comes on and off.\tElectric Heater: Similar to that of an iron box but here, a circuit breaker is used\tThe Electric Fuse: Copper or zinc can be used as the fuse element. When there is an excess of current flow through the electrical circuit, the heat generated increases as well and melts the fuse, thereby breaking the circuit. | |
| 59472. |
Prove that corbondioxide is necessary for photosynthesis |
| Answer» Take two healthy potted plants which are nearly the same size. Keep them in a dark room for three days. Now place each plant on separate glass plates. Place a watch-glass containing potassium hydroxide by the side of one of the plants. The potassium hydroxide is used to absorb carbon dioxide. Cover both plants with separate bell-jars. Use vaseline to seal the bottom of the jars to the glass plates so that the set-up is air-tight. Keep the plants in sunlight for about two hours. Pluck a leaf from each plant. Remove the green coloured chlorophyll from the leaves by boiling them in alcohol. Wash the decolourised leaves with water and then pour iodine solution over them. Observe the change in colour of the leaves.We will find that the leaf from the plant (which was inside the bell jar containing potassium hydroxide which absorbed the carbon dioxide), does not turn blue-black on adding iodine solution showing that no starch is present. So we can conclude that the photosynthesis cannot be carried out without carbon dioxide.The leaf from the plant (which was inside the other bell jar without potassium hydroxide and so having carbon dioxide in it) turns blue-black on adding iodine solution showing that starch is present in this leaf. From this observation we conclude that photosynthesis (to make starch) takes place in the presence of carbon dioxide.So this shows that carbon dioxide is necessary for the process of photosynthesis to take place. | |
| 59473. |
Hlooo..hiii |
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Answer» Hiii Hello Yahan ac chll raha hai..? Kya chal raha h |
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| 59474. |
What is magnification of concave mirror. |
| Answer» m=-v/u | |
| 59475. |
What do you mean by resistance in a circuit |
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Answer» Hm It is a property of conductor which resists or opposes the flow of electric current. Flow me Resistance means obstruction (rukawat)charges ke flow aane wale obstruction |
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| 59476. |
Can you clear my topic qyantization of charge. |
| Answer» | |
| 59477. |
Formula of surface areas of solids and shapes and volumes of all |
| Answer» What means | |
| 59478. |
Why does distilled water not conduct electricity wheraes rain water does |
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Answer» Distilled water is neutral nither acidic nor basic but rain water is acidic.So it conducts electricity. May be distilled me salt ni hota ?usme electricity conduct karne ke liye ions present ni hote and rain water m acid hota h jo electricity conduct karta h |
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| 59479. |
Describe Mende\'elevs periodic table. |
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Answer» \tMendeleev used atomic weight as the basis of classification of elements in the periodic table.He arranged 63 elements known at that time in the periodic table on the basis of the order of their increasing atomic weights and he placed elements with similar nature in same group.\tIn Mendeleev table, the elements were arranged in vertical columns, and horizontal rows. The vertical columns were called groups and the horizontal rows were called periods.\tThere were in all eight groups. Group I to VIII. The group numbers were indicated by Roman numerals. Group VIII occupy three triads of the elements each i.e. in all nine elements.\tThere were seven periods to accommodate more elements the period 4, 5, 6 and 7 were divided into two halves. The first half of the elements were placed in the upper left corner and the second half in the lower right corner of each box. Mendeleev’s Periodic Table : When elements are arranged in the order of increasing atomic masses, the element with similar properties occur at regular intervals. The properties of elements are a periodic function of their atomic masses.Mendeleev’s periodic table is based on the chemical properties of elements. It contains 6 periods (horizontal rows) and 8 groups (vertical columns).? Please elaborate in simple way... Mendeleev arranged all the known elements (63 at that time) in horizontal rows and vertical\xa0columns in order of increasing atomic masses in the form of table known as Periodic table. Mendeleev’s table has few vertical columns called groups and a few horizontal rows called periods. Mendeleev left certain gaps in his table and predicted that new elements would be discovered to fill up the gaps.The Mendeleev\'s modified periodic table consists of:(i) Nine vertical columns called groups. These are numbered from I to VIII and zero (The members of the zero group were not discovered at the time of Mendeleev). Each group from I to VII, is further sub-divided into two sub-groups-A and B. Group VIII consists of three sets, each containing three elements. Group zero consists of noble gases.(ii) Seven horizontal rows are called periods. These are numbered from I to VII. First period contains two elements, second and third periods contain eight elements each. These periods are called short periods. Fourth and fifth periods contain eighteen elements each. These periods are called long periods. Sixth period contains thirty two elements and is called longest period. Seventh period is incomplete and contains nineteen elements (At. No. 87-105). |
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| 59480. |
Project on consumer rights. |
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Answer» Its okay? Sorry sister .....we are not able to do project here........ |
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| 59481. |
What Is Rusting?? |
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Answer» The process in which any material undergoes change when it is left open for long time is called rusting Rusting is chemical process and it is a type of corrosion. Which happens in the iron objects or objects containing iron metal.When iron or objects containing iron undergo corrosion, it is known as rusting. Oxidation of iron is called as rusting. Rusting involves slow oxidation of iron in presence of air and moisture. 4Fe + 3O2 → 2Fe2O3 Iron Oxygen Ferric oxide\xa02Fe2O3 + xH2O → Fe2O3.xH2O (moisture) Rust Hydrated iron (III)oxide |
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| 59482. |
What are life processe |
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Answer» Every living organisms take food, derive energy, remove waste materials from their bodies and respond to changes in their environment. These activities are called life processes. Various functions carried out by living beings; which are necessary to maintain and continue life are called life process. In all living organisms there occur the basic life processes such as nutrition, respiration, transportation, excretion and reproduction, which are necessary for survival. The processes which help in the maintainance job of our body are called life processes |
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| 59483. |
Deference between acid and base |
| Answer» \tBasisAcidBaseDefinitionAn acid is any chemical compound once dissolved in water produces a solution with hydrogen ion activity more than purified waterA base is an aqueous substance that could absorb hydrogen ions.StrengthRelies on the concentration of the hydronium ionsRelies on the concentration of the hydroxide ionsExamplesAcetic acid CH3COOH and sulphuric acidSodium Hydroxide (NAOH) and AmmoniaCharacteristics (Physical)Would depend upon the temperature acids would look solid, liquid or in the form of gas. It would also have a sour taste.Bases would feel slippery and solid in nature except ammonia which is gaseous. It would have a bitter taste.DisassociationAcids would release hydrogen ions (h+) when mixed with waterBases would release hydroxide ions(OH-) when mixed with waterTest with LitmusWould turn litmus paper redWould turn litmus paper blue\t | |
| 59484. |
Which book is better for Science Biology and Chemistry Lakhmir Singh or S.Dinesh or any other |
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Answer» Pradeep have great questions Only ncert book?? |
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| 59485. |
All formula from physics |
| Answer» | |
| 59486. |
Answer of activity 2.1 |
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| 59487. |
Answer of activities |
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| 59488. |
Difference between eye and eye spots |
| Answer» An eyespot is a rudimentary organ which enables the organism to detect light (between daylight and darkness) whereas eye is a well-developed organ that enable us to get a clear image. Eyespots are seen in Planaria. | |
| 59489. |
Give five points to show the significance of variation |
| Answer» 1. Variation is the difference in organisms2. Variation takes place when organisms reproduce3. Atleast one character will be differ from one organism to another organism4. Variation is the main base some organisms to exist5. Scientists like Charles Darwin, Model etc are involved in this part\xa0 | |
| 59490. |
Evolution has occurred in stages justify the statement |
| Answer» Evolution is a step by step process, it does not happen in few years. It takes generations by generations to exhibit variations over a large range. Organisms get adapted to their habitat by bring about certain changes in their structure. These changes are called as adaptations which bring about variations in the evolution. These variations are carried on to successive generations by natural selection. A classic example which supports the statement \'Evolution by stages\' is the evolution of eye. In lower organisms like planaria, optic sensory structures are present as patches which act as eye spots. In organisms like cockroaches, compound eyes are present which help them to see around their body.In organisms like octopus, eye is remarkable having iris, circular lens, vitreous cavity, retina with photoreceptor cells. They lack a cornea. The lens in octopus does not change its shape but focusses through movement. In vertebrates, eye is a well-developed sensory structure with iris, ciliary muscles, pupil, cornea and a lens. The size of the pupil can be regulated. Shape of the lens can be adjusted in order to focus the image on the retina.\xa0 | |
| 59491. |
Define evolution how does it occur describe how fossils provide evidence in support of evolution |
| Answer» Evolution is defined as a process of gradual changes which takes in primary organisms over millions of years in which new species are produced.Evolution occurs through the changes which takes place in the organisms since the life has originated. Moreover, there is a tendency to bring variation in the offspring\'s during sexual reproduction which results in evolution. Fossils are defined as the dead remains of plants and animals that lived in remote past. Dead plants and animals are decomposed by the microorganisms in presence of oxygen and moisture. The complex substances are broken into simpler substances but sometimes in absence of oxygen and moisture, the dead bodies are not decomposed completely and gets preserved in form of fossils in the rocks. The presence of fossils proves the evolution such as one of the example of Fossil is: A bird Archaeopteryx has many characteristics of reptiles and seems to be evolved from reptiles. | |
| 59492. |
Difference between male gamete and female gamete |
| Answer» Male gamete :(i) It is smaller in size or compared to the female gamete.(ii) It is motileFemale gamete :(i) It is bigger in size.(ii) It is non-motile. | |
| 59493. |
What are the various part of an embryo of a dicot seed |
| Answer» The embryo of dicot seeds consists of three main parts – plumule, radicle and two cotyledons. | |
| 59494. |
Main difference between axims and cytobims |
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Answer» \tAn axiom is called as postulate. An axiom is a rule or a statement that is accepted as true without proof.\tAn axiom is a statement that everyone believes is true, such as "supply equals demand" or "the only constant is change.\tPostulate is a statement that is considered to be self-evident. If you want difference between postulate and axims then answer is |
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| 59495. |
Activity solution 2.1 |
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| 59496. |
Why ice is covered by grass to prevent melting |
| Answer» Grass trap air in them. Air is a bad conductor of heat. Hence the air in the pores of the fibre prevents any heat transfer between the ice and the surroundings. This prevents ice from melting. | |
| 59497. |
Name two non metals that are hard |
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Answer» Non-metals break into pieces when stretched. Sulphur, phosphorous and carbon are brittle solids. Gold and silver Diamond |
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| 59498. |
Nutrition and plants ncert |
| Answer» Get NCERT solutions here :\xa0https://mycbseguide.com/ncert-solutions.html | |
| 59499. |
What us a hydronium ion |
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Answer» Hydronium ion is a water molecule with an extra hydrogen ion attached to it. ( H2O + H+ → H3O+ ). It usually used to determine the acidity of a chemical compound.When a compound is put into water solution, the more the hydronium ion is produced, the higher the acidity is.EX: HCl + H2O → Cl- + H3O+. The Hydrogen ion is transferred to water molecule. The hydronium ion or hydronium is the name given to the H3O+cation, derived from the protonation of water. |
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| 59500. |
Verification of ohms law |
| Answer» At constant temperature the p.d. is directly propotional to electric current which pass through a conducter | |