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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.
| 39951. |
Why plants low energy needs |
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| 39952. |
Why DNA is essential for our body? |
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| 39953. |
Why sky appears blue in colour |
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| 39954. |
Why sky appear blue in colour |
| Answer» When sunlight passes through fine molecules of air it scatter blue colour of shorter wavelength the most which reaches our eyes | |
| 39955. |
When object is placed at F why is it real |
| Answer» Because the image is formed in front of mirror | |
| 39956. |
What is double circulation in human? |
| Answer» Double circulation means that the blood has to trvel through our heart 2 times | |
| 39957. |
What is ozone depletion |
| Answer» Reduction in the concentration of ozone in ozone layer | |
| 39958. |
How many elements of metal |
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| 39959. |
what is percistance of vision ? |
| Answer» The impression of an object seen by the eye persists on the retina for 1 /16 th of a second, even after the object is removed. If another object is seen before this time, the impressions of the two merge to give us the sensation of continuity. This property of eye is called persistence of vision. | |
| 39960. |
No of carbon atom in a homologous series increases so does boiling point increases or decreases? |
| Answer» Incrs | |
| 39961. |
Examples of homologous organs |
| Answer» Following are some\xa0examples of homology: The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale arehomologous\xa0structures. They are different and have a different purpose, but they are similar and share common traits. | |
| 39962. |
What is induced current? |
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| 39963. |
What happens if egg is not fertilized |
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Answer» The uterus prepare itself every month to receive fertilized eggs the lining of uterus become thick and spongy required to support the embryo .when fertilisation had not take place this lining is not need any longer the lining brake when comes out through ****** has blood and Mucus this Cycle take around 28 days every month called maturation If it is not ferized it comes out of ****** in form of blood If egg is not fertilised then thick wall and spongy wall may rupture and come through ****** with help of mucus and blood which is known as menstrual cycle |
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| 39964. |
Whyhydrogenperoxideiskeptincolouredbottles |
| Answer» If Hydrogen peroxide is not stored in plain (colorless) bottles then light will pass through in and decomposes Hydrogen peroxide into water and oxygen.2H₂O₂ + hᵞ (light) → 2 H₂O + O₂ In order to avoid this decomposition it was stored in colored bottles. | |
| 39965. |
Which elements are known as chalogens |
| Answer» This group is also known as the oxygen family. It consists of the elements oxygen (O),\xa0sulfur\xa0(S),\xa0selenium\xa0(Se),\xa0tellurium\xa0(Te), and the radioactive elementpolonium\xa0(Po). The chemically uncharacterized synthetic element livermorium (Lv) is predicted to be a chalcogen as well. | |
| 39966. |
lateral displacement |
| Answer» The perpendicular distance between the direction of the incident ray and emergent ray is called “lateral shift’’. The factors on which the\xa0lateral displacement\xa0depends are: Thickness of the refracting material and the refractive index of the material. | |
| 39967. |
Why has chlorine has higher affinity than flourine |
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| 39968. |
What is saturated compound |
| Answer» Having only single bonds Eg.,C2H6 (ethane) H H | |H-C-C-H | | H H | |
| 39969. |
What is respiration? |
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Answer» It is chemical process in which Oxygen is taken and food is oxidised to release energy along with removal of carbondioxide The process of breaking down of food to produce energy in the living organisms is called respiration |
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| 39970. |
What is the name of those harmones which is known ad master harmone...... |
| Answer» Mne kbhi nhi suna | |
| 39971. |
Example of nuclear fission and fusion... |
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| Answer» | \xa0 | Nuclear Fission | Nuclear Fusion | Definition | Natural occurrence of the process | Byproducts of the reaction | Conditions | Energy Requirement | Energy Released | Nuclear weapon | Energy production | Fuel | \t\t\tFission is the splitting of a large atom into two or more smaller ones.Fusion is the fusing of two or more lighter atoms into a larger one.Fission reaction does not normally occur in nature.Fusion occurs in stars, such as the sun.Fission produces many highly radioactive particles.Few radioactive particles are produced by fusion reaction, but if a fission "trigger" is used, radioactive particles will result from that.Critical mass of the substance and high-speed neutrons are required.High density, high temperature environment is required.Takes little energy to split two atoms in a fission reaction.Extremely high energy is required to bring two or more protons close enough that nuclear forces overcome their electrostatic repulsion.The energy released by fission is a million times greater than that released in chemical reactions, but lower than the energy released by nuclear fusion.The\xa0energy\xa0released by fusion is three to four times greater than the energy released by fission.One class of nuclear weapon is a fission bomb, also known as an atomic bomb or atom bomb.One class of nuclear weapon is the hydrogen bomb, which uses a fission reaction to "trigger" a fusion reaction.Fission is used in nuclear power plants.Fusion is an experimental technology for producing power.Uranium is the primary fuel used in power plants.Hydrogen isotopes (Deuterium and Tritium) are the primary fuel used in experimental fusion power plants.\t|
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| 39972. |
Period table |
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| 39973. |
Explain how electrical is generated from nuclear energy. |
| Answer» By the process of nuclear fission. | |
| 39974. |
Why is focal length of plane mirror infinity? |
| Answer» Focal length is the point half of radius. This radius is obtained by extenteding the edges of lens to obtain a imaginary circle. And then we get center of circle, C. Focal lenth is half of radius. So, technically a plane mirror never going to be a circle. But, in hypothetically we say it will be a circle of infinite radius. Hence, focal length is also INFINITE. | |
| 39975. |
How are different stakeholders dependent on forest? Mention any four of them |
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Answer» Tribal: for their living.Industrialists: for raw materials.Forest department: owns and controls the resources.Nature enthusiasts:conserve nature. The stakeholders who are directly or indirectly affected by forest are as follows:\tPeople living in or around forests; as they depend on various forest produce for their livelihood.\tThe forest department which is the owner of the forest land.\tVarious industrialists who depend on forest for many raw materials. For example; the beedi industry needs kendu leaves as raw material. Wood is used as raw material in many industries.\tThe wildlife and nature enthusiasts. |
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| 39976. |
Important exam questions |
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| 39977. |
what is limitation of newland\'s law of octaves |
| Answer» It is not applicable for elements after Calcium | |
| 39978. |
All questions will come from NCERT books or other books? |
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| 39979. |
How I learn peroidic TABLE |
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| 39980. |
Who add in eachWater in acid or acid in water |
| Answer» Acid in water | |
| 39981. |
What is thermal energy |
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| 39982. |
Why shadow formed in only black colour ,not in other colours? |
| Answer» A shadow is formed when light from a light source is obstructed by some object. Relating the 2 statements, when a shadow is formed it happens due to absorption of all light by any object from a light emitting source. As a result a shadow is produced which is due to absorption or absence of light, hence\xa0black in color. | |
| 39983. |
Explain all the disease related to eyes |
| Answer» EyestrainAnyone who reads for hours, works at a computer, or drives long distances knows about this one. It happens when you overuse your\xa0eyes. They get tired and need to rest, just like any other part of your body.If your\xa0eyes\xa0feel strained, give them some time off. If they’re still weary after a few days, check with your doctor to make sure it isn’t another problem.Red EyesTheir surface is covered in\xa0blood\xa0vessels that expand when they’re irritated or infected. That gives your eyes the red look.Eyestrain can do it, and so can a late night, a lack of\xa0sleep, or\xa0allergies. If an injury is the cause, get it checked by your doctor.Red eyes could be a symptom of another eye condition, like\xa0conjunctivitis(pinkeye) or\xa0sun damage\xa0from not wearing shades over the years. If over-the-counter eye drops and rest don’t clear it up, see your doctor.Night BlindnessIs it hard to see at night, especially while driving? Is it tough to find your way around in dark places, such as movie theaters?That sounds like\xa0night blindness. It’s a symptom, not a problem in its own right.\xa0Nearsightedness,\xa0cataracts,\xa0keratoconus, and a lack of\xa0vitamin A\xa0all cause a type of\xa0night blindness\xa0that doctors can fix.Some people are born with this problem, or it might develop from a degenerative disease involving the retina, and that usually can’t be treated. If you have it, you’ll need to be extra careful in areas of low light. | |
| 39984. |
5 kilo joule |
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| 39985. |
Difference between resistor and resistivity |
| Answer» A\xa0resistor\xa0is an electric component with a predetermined electrical\xa0resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area.\xa0The unit for resistivity is the ohm-metre.\xa0The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size.\xa0A good conductor has less resistivity, whereas a bad conductor or insulator has high resistivity. The resistivity of semi-conductors lies between that of conductors and insulators.\xa0 | |
| 39986. |
Explain construction and working of human eye |
| Answer» The light coming from an object enters the eye through cornea and pupil. The eye lens converges these light rays to form a real, inverted and diminished image on the retina. The light sensitive cells of the retina gets activated with the incidence of light and generate electric signals. These electric signals are sent to the brain by the optic nerves and the brain interprets the electrical signals in such away that we see an image which is erect and of the same size as the object. Before we go into the defects of vision let us be familiar with the terminology used by the ophthalmologists like least distance of distinct vision, far point and power of accommodation of the eye.\xa0Functions of the Parts of Human EyeScleraProtects and contains internal partsCorneaCornea is responsible for maximum refraction of incident lightAqueous HumourPrevents collapse of the eye due to atmospheric pressure changesIrisIris controls the light entering the eye by adjusting the size of pupilCrystalline LensFocuses the light reflected by objects on the retina.Ciliary MusclesAlter focal length of the crystalline lensRetinaReceives optical image and converts it to electrical impulsesVitreous HumourMaintains the shape of the eyeOptic NerveCarries electrical impulses to the brain. Brain interprets these impulses and produces the sense of vision. | |
| 39987. |
collect information about generation of current by Faraday\'s law |
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| 39988. |
What is oscillator |
| Answer» An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together. | |
| 39989. |
Why blood are red |
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Answer» Due to the presence of hemoglobin Because of the presence of haemoglobin Because of the presence of red blood cells(RBC).It gives red color to the blood. presense of RBC |
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| 39990. |
At what position of an object will the magnification be -1 |
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| 39991. |
What is a battery |
| Answer» An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, smartphones, and electric cars.\xa0 | |
| 39992. |
what is rusting |
| Answer» Corrosion of iron is called rusting | |
| 39993. |
What Is Myopia ???❤❤❤❤❤❤❤ |
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Answer» In which person cannot see distant object clearly It is an eye defect in which a person is able to see the nearby objects clearly but cannot see the distant object clearly? |
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| 39994. |
What is homologous organs provide evidence for evolution? |
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| 39995. |
What is chyme ? |
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| 39996. |
What is an electromagnetic induction? |
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Answer» The phenomenon of producing electric current in conductor by moving perpendicular to magnetic field or vice versa is known as electromagnetic induction. The production of electricity from magnetism is called electromagnetic induction... |
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| 39997. |
Thankyou my cbse guide because of your science note my exam is excellent |
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| 39998. |
Define induced current produced in a solenoid. |
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| 39999. |
Why planat do not twinkle? |
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Answer» Sorry does nt Because they are nearer to us as compared to stars due to which stars twinkle and planet does Because they are nearer to us.. Because planat have do not its own light .so they don\'t twinkle |
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| 40000. |
mention two types of nerves it consists of along with their organ of orgin |
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