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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.
| 59101. |
Name 2 metals which Get tarnished. Why does this happen? |
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Answer» thank you ? A metal tarnishes due to oxidation. It forms an oxide layer on the metal.eg: copper, when new it is shiny, but after a time outside, it goes green. This is due to oxidation and is called a tarnish.Another example can be Iron |
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| 59102. |
Detail description of digestive system with diagram |
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| 59103. |
Difference between respiration and photosynthesis and photosynthesis |
| Answer» \tBasis of ComparisonPhotosynthesisRespirationMeaningIt is the process in which green plants and few bacteria use sunlight and water to convert it into energy.It refers to the process in which all living organisms except plants convert energy and offer to the different cells of the body.OccurrenceOccurs in plants containing chlorophyll and some bacteriaOccurs in all living organismsBy-ProductsGlucose, oxygen, and waterCarbon dioxide, water, and energy (ATP)ProcessIt takes place in chloroplastsIt takes place in mitochondriaUndergoesAnabolic processCatabolic processReactantsCarbon dioxide, water, and light energyGlucose and oxygenReactionEndothermic reaction because it needs energyExergonic reaction because it releases energyFunctionProduces food and captures the energyTakes in oxygen and liberates out carbon dioxideSunlightRequires sunlight because it is mandatoryDoes not require sunlight as it takes place all the timeCO2\xa0and waterAbsorbs carbon dioxide and waterReleases carbon dioxide and waterChemical reaction6CO2\xa0+ 6H2O → C6H12O6\xa0+ 6O2C6H12O6\xa0+ 6O2\xa0→ 6CO2\xa0+ 6H2O\t | |
| 59104. |
Define the phototropic movement |
| Answer» The movement towards the light is known as phototrophic movement.It is mainly seen in plants. | |
| 59105. |
What are the types of chemical reactions. explain |
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Answer» There are five types of chemical reactions combination reactions , decomposition reactions, displacement reactions , double displacement reactions, exothermic and endothermic reactions. There are also oxidation reaction and reduction reaction. There are four types of chemical reactions 1. Combination reaction2. Decomposition reaction 3. Displacement reaction 4. Double Displacement reaction |
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| 59106. |
Explain the functioning of phloem in transporting food in plants. |
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Answer» Phloem is the tissue that helps in the transport of food throughout the plant. The different elements of phloem include sieve tubes, companion cells, phloem parenchyma and phloem fibres To transport food material |
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| 59107. |
What is insulde Current |
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| 59108. |
The number of S8 molecules in 128gram of sulpher would be |
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| 59109. |
What is conductor and insulator? |
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Answer» Thnks It can also be said that,the substances which have ow resistivity are known as conductors and the substances have high resistivity are called insulators. The substances which allow electric current to pass through them is called a CONDUCTOR and the substances which do not allow electric current to pass through them are called INSULATORS. The materials which allow heat/electricity to pass through them easily are conductors of heat/electricity. For examples,aluminum, iron and copper.The materials which do not allow heat/electricity to pass through them easily are poor conductors of heat/electricity such as plastic and wood. Poor conductors are known as insulators The substance in which electricity passes easily is called conductor The material which has less resistance to electricity is known as conductor and the opposite is known as insulator Jisme free electrons jyada hota hai wo conductor or jisme kam / nhi wo insulator. |
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| 59110. |
Functiom of nostrils |
| Answer» Nostrils helps in taking air inside and in the walls of nostrills mucus are present which help in blocking dust particles to go inside | |
| 59111. |
Definition of food |
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Answer» The outside source of energy is called food. any nutritious substance that people or animals eat or drink or that plants absorb in order to maintain life and growth. External raw material used by living thing by digestion of which they get energy is called food something that people or animals eat |
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| 59112. |
Suggest a biochemical reaction which is also a combination reaction. Write its reaction also. |
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| 59113. |
How reproduction in animals take plase |
| Answer» The reproduction in animal is done by the method of sexual reproduction. | |
| 59114. |
Differentciat between RBC and WBC |
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Answer» \tRBC – Red Blood CellsWBC – White Blood CellsRed blood cells are called as Erythrocytes.White Blood Cells are called as Leucocytes or Leukocytes.RBCs are shaped as bi-concave discs.These have an irregular shape.Size varies from 6 – 8 µm in diameter.Size varies from 12 – 17 µm in diameter.These cells have a lifespan of about 120 days.These have a lifespan of around 13-20 days after which, they are destroyed in the lymphatic systemRed blood cells do not have a nucleus at maturity.WBCs are characterized by the presence of a large central nucleus.Due to the presence of hemoglobin, these cells appear red in color.These cells are colorless, as they do not have any pigment.Only one type of RBCs exists.Different types of WBC’s are found in the blood such as neutrophils, B lymphocytes, T lymphocytes, monocytes, basophils, eosinophils.They help in the transport of respiratory gases to different parts of the human bodyThey help in producing antibodies to fight against diseases causing microbes.RBCs are produced in the red bone marrowThese cells are produced in the red bone marrow, lymph nodes, and spleen, etc.\t Rbc have hemoglobinWbc are soldier of the body |
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| 59115. |
Valency table |
| Answer» what is the full form of PNR | |
| 59116. |
what is the method of balancing chemical equation |
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Answer» 1.You will need: coloured balls (or marbles), prestik, a sheet of paper and coloured pens.We will try to balance the following equation: Take one ball of one colour. This represents a molecule of . Take two balls of another colour and stick them together. This represents a molecule of . Place these molecules on your left. Now take two balls of the first colour and three balls of the second colour to form . Place this compound on your right. On a piece of paper draw coloured circles to represent the balls. Draw a line down the centre of the paper to represent the molecules on the left and on the right.Count the number of balls on the left and the number on the right. Do you have the same number of each colour on both sides? If not, the equation is not balanced. How many balls of each colour will you have to add to each side to make the number of balls the same? How would you add these balls?You should find that you need four balls of the first colour for and three pairs of balls of the second colour (i.e. six balls in total) for on the left side. On the right side you should find that you need clusters of balls for . We say that the balanced equation is: U have to make all the components on reactant side and product side by adding the prefix |
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| 59117. |
What does meant by exothermic and endothermic reaction give examples |
| Answer» Exothermic Reaction: A chemical reaction in which heat is given out is known as exothermic reaction. For exampleC(g) + O2(g) → CO2(g) + Heat energyNaOH (aq) + HCl (aq) → NaCl(aq) + H2O(l) + EnergyEndothermic Reaction: A chemical reaction in which heat energy is absorbed is known as endothermic reaction. For exampleN2(g) + O2(g) → 2NOC(s) + H2O(l) → CO(g) + H2(g) | |
| 59118. |
Do all circuits have ammeter ? |
| Answer» Yes all circuits have ammeter as it measures the current flowing it is necessary to have an ammeter... | |
| 59119. |
Where does the blood absorb oxygen? |
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Answer» Blood absorbs oxygen in the lungs. The exchange of gases takes place in the alveoli of lungs and the blood present in the blood capillaries surrounding the alveoli. From lunga |
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| 59120. |
Why electric current is known as scaler quantity still it has direction? |
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Answer» For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough. The quantity should obey the laws of vector addition too. Like the triangle law or the parallelogram law. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum. Nice question Payal |
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| 59121. |
Why are the most carbon compounds poor conductor of electricity? |
| Answer» Carbon compounds form Covalent bonds. They do not dissociate into ions and do not have\xa0charged particles (ions). | |
| 59122. |
What were the limitations of Mandeleev\'s table and how did the modern periodic table solve them |
| Answer» Limitations of mendeleev’s classification :(i) He could not assign a correct position of\xa0hydrogen in his periodic table, as the properties\xa0of hydrogen resembles both with alkali metals as well as with halogens.(ii) The isotopes of the same element will be given\xa0different position if atomic number is taken as\xa0basis, which will disturb the symmetry of the\xa0periodic table.(iii) The atomic masses do not increases in a regular\xa0manner in going from one elements to the next.The various anomalies of Mendeleev include the position of hydrogen, anomalous pair of isotopes, position of lanthanides and actinides etc. These limitations were overcome in the modern periodic table by adopting Atomic number as the main criteria instead of atomic mass. | |
| 59123. |
What is heterotrophic |
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Answer» \tHeterotrophic nutrition is that mode of nutrition in which an organism cannot make (or synthesizes) its own food from simple inorganic materials like carbon dioxide and water, and depends on other organisms for its food.\tThose organisms which cannot make their own food from inorganic substances like carbon dioxide and water, and depends on other organisms for their food are called heterotrophs.\tExample: all the animals (man, dog, cat, lion, etc.), most bacteria and fungi. an organism deriving its nutritional requirements from complex organic substances. |
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| 59124. |
What is difference between resistance and resistor |
| Answer» \tResistorResistanceA resistor is an electric component with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc..\xa0Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it.\xa0\t | |
| 59125. |
10 th class lesson no. 6 life. Process |
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Answer» Yes it is very interesting Its very intresting chapter? |
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| 59126. |
Please explain the role of stomach in digestion... |
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Answer» In the stomach gastic gland is present which secret concentrated HCl which activate pepcin (enzyme secreted by protease )which digest the protein To form food into paste |
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| 59127. |
Why magnesium ribben clean when reaction |
| Answer» To remove the protective layer of magnesium oxide which prevent it from burning in air, it is cleaned with the help of a sand paper . | |
| 59128. |
Explain the processof photosynthsis in desert plants |
| Answer» Desert plants like cactus also carry the process of photosynthesis , they prepair their food using the chlorophyll present in their stem . | |
| 59129. |
Draw a neat and labelled diagram Showing the digestive system of a grasshopper. |
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| 59130. |
What is the core realation between digestion and respiration |
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Answer» Digestion is the process which digests the food and absorps all the nutrients which then are used to convert into energy through the process of respiration They both releases energy Rhey both releases energy |
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| 59131. |
What is the apraturw |
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Answer» \tThe diameter of the reflecting surface of spherical mirror is called its aperture.\tMirrors whose aperture is much smaller than its radius of curvature, we use R=2f. Its aperture.....?..... its the width of the reflecting surface of a curved mirror....... |
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| 59132. |
What is exothermic? |
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Answer» An exothermic reaction is a reaction in which energy is released in the form of light or heat. Thus in an exothermic reaction, energy is transferred into the surroundings rather than taking energy from the surroundings as in an endothermic reaction. In an exothermic reaction, change in enthalpy ( ΔH) will be negative. Inst par I\'d kya hai apki Apki I\'d fb par hai kya Kya kar rhi ho ap Hy Thanks The reacation in which heat is released along with the formation of product. |
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| 59133. |
Define 1Coulomb |
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Answer» Since coulam is the unit of charge Q=NE wheare Q=1 ,n=_ ,e=-1.602*10^-17 when we put these values in formula we get 6.25*10^18 1 coulomb is equal to the charge transfer in a metal in one second while contantly 1A of current flows through it. |
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| 59134. |
Photolysis |
| Answer» Photolysis to example sliver chlorine formed jab kartha hai tha hothaa hai clour change grey to photolysis ho tha hai mev | |
| 59135. |
Which is best guide for science |
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Answer» I think arihant all in one is best gudie of science S.chand is best ... For physics chemistry and bio S. CHAND lakhmir Singh and manjit kaur |
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| 59136. |
What is combination? |
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Answer» The combing of two particles is called combination reaction Thank you The reaction in which two or more substances combine to form a single substance..it is known as combination reaaction |
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| 59137. |
Numericals of electicity |
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| 59138. |
What does one mean by exothermic and endothermic reaction ? Give example |
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Answer» Energy realsed is called exothermic and energy in which energy is absorbed The chemical reactions in which Energy is released , called exothermic reactions, Eg- CaCl2+ H2O--------> Product+ HeatOr any others neutralize reactions.Endothermic opposed it.Eg.All thermal chemical reactions. |
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| 59139. |
Chemical rection |
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| 59140. |
Focal lenght of a convex mirror is 15 cm what is the radius of a curvature |
| Answer» Radius of curvature = 2×focal length of convex mirror= 2×15= 30 | |
| 59141. |
What are the sources of light |
| Answer» Natural Light Sources:The universe is filled with objects that emit light. Some of the light from these sources reach the earth. The following things in nature have the ability to emit light:\tThe Sun is the major source of light for the earth. The sun is a massive ball of fire, at the centre of which nuclear fusion produces massive energy. This energy comes out as heat and light. The light from the sun is one of the major factors behind the sustainability of life on earth.\tEvery other star produces light too, but only a small or no amount of it reaches the earth because of the huge distance.\tThe moon provides light as well but it cannot produce light on its own. The light that we get from the moon is the light reflected by it from the sun.Artificial Light Sources:Apart from the natural sources, light can be produced artificially too. The different light sources produced artificially can be put under three broad categories-\tIncandescent Sources:When certain objects are heated to a high temperature, they begin to emit light. Both infrared and visible light is produced in the process.Example- Candle, incandescent lamp.\tLuminescent Sources:Light can be produced by accelerating charges in a luminescent material. One common way of doing it is by passing current through the material.Example- Fluorescent tube light, electric bulb\tGas Discharge Sources:Passing electricity through certain gases at a very low pressure can produce light too.Example – Neon lamp, Sodium lamp.Stay tuned with BYJU’S to learn more about light sources, electromagnetic radiation and much more. | |
| 59142. |
What do you mean by the term mass |
| Answer» It is the fixed quantity | |
| 59143. |
Science ka paper ma grace marks milaga |
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| 59144. |
Which is most effective wavelength of light for photosynthesis |
| Answer» Blue | |
| 59145. |
Write the balanced chemical equation for the reaction |
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Answer» 2H2o gives H2plus o2 Tum kyon ho |
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| 59146. |
Acivity 4.3 in cbse science text book |
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| 59147. |
Define 1Amper |
| Answer» 1 ampere is curent flowing conductor when 1 coulomb of charges in one second through cross section of conductor. | |
| 59148. |
How are alveoli designed to maximize the exchange of gases |
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Answer» The alveoli are thin walled and richly supplied with a network of blood vessels to facilitate exchange of gases between blood and the air filled in alveoli. They have balloon – like structure that provide maximum surface area for exchange of gases. The alveoli are thin walled and richly supplied with a network of blood vessels to facilitate exchange of gases between blood and the air filled in alveoli. They have balloon – like structure that provide maximum surface area for exchange of gases. Hi |
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| 59149. |
Define 1A. |
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| 59150. |
Describe the steps involved in aerobic respiration |
| Answer» respiration is the process by which energy is released from oxidation of glucose . It is a biochemical process . Aerobic respiration means respiration in presence of oxygen . It occur inside the cell in mitochondria. The steps involved in this are= (1)- the first process is taking in oxygen by the process of breathing(inhalation) .(2) then this oxygen goes to each cell by assimilation in lungs. It is carried to each cell by haemoglobin .(3) Then oxygen present in cell make glucose to burn slowly(oxidise) .(4)- In this process CO2 is produced as a bi-product which is taken out of body by exhalation . Water is also produced as no product. In this a lot energy is produced (38atp molecules)♧♧♧♧♧ | |