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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.
| 52751. |
Draw a labelled diagram of stomata and write it\'s functions |
| Answer» Or kuch ni aataDiagrams k alava | |
| 52752. |
Define photo decomposition |
| Answer» When decomposition reaction takes place by the presence of light then that reaction is called photodecomposition reaction | |
| 52753. |
Why is heart made of cardiac muscle |
| Answer» The heart is made of cardiac muscle with a thin layer of endothelium, a thin layer of pericardium, the valves and some blood vessels. It\'s job is to pump blood to the rest of the body. It should be obvious that the greatest amount of mass would be made of cardiac muscle. | |
| 52754. |
Electricity exacise qustion |
| Answer» My cbse guide kya khater h | |
| 52755. |
If person don\'t have legs & legs how they will test BP |
| Answer» | |
| 52756. |
from where does the tears come |
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Answer» Tear glands lacrimal gland secerates the tears From tear glands |
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| 52757. |
5. Name the products of photolysis of water |
| Answer» Hydrogen and oxygen 2H2O------->3H2+02 | |
| 52758. |
Explain the structure of atom? |
| Answer» Atoms are made up of particles called protons, neutrons, and electrons, which are responsible for the mass and charge of atoms.................................................................Atomic ParticlesAtoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.The hydrogen atom (H) contains only one proton, one electron, and no neutrons. This can be determined using the atomic number and the mass number of the element (see the concept on atomic numbers and mass numbers). | |
| 52759. |
What is livre |
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Answer» But Anushka scientifically the spelling is wrong but you are right ? I think nikita isn\'t wrong Chetna. Livre is the currency of France.? The liver is an accessory digestive gland that produces bile, an alkaline compound which helps the breakdown of fat. Bile aids in digestion via the emulsification of lipids. The gallbladder, a small pouch that sits just under the liver, stores bile produced by the liver.And Nikita correct your spelling it is "liver" not livre ?. |
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| 52760. |
How to make a solenoid? |
| Answer» To make a solenoid take an iron core and bind it with copper wire and flow current through it by the help of a cell or a battery after flowing current the iron core will magnetized and create a magnetic field thus this iron core which is magnetize became an solenoid | |
| 52761. |
Who discover ray diagrms |
| Answer» | |
| 52762. |
please suggest me which model I prepared related to science |
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Answer» make a model on mode of nutrition in amobea from where r u Human heart or digestion process |
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| 52763. |
Kya amoeba reproduce hone ke baad daed ho jata hai |
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Answer» Hi yuv raj No Place the Amoeba in saturated salt solution and it will die due to exocytosis. Natural death is not possible for amoeba as amoeba is a unicellular organism and it reproduce asexually i.e. by binary fission. ... Put it in a concentrated salt solution and it will die due to exocytosis or water loss.So nahi Nahi...... Amoeba binary fision... |
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| 52764. |
What do you mean by the term bright crimson? |
| Answer» Crimson is a strong red color inclining to purple. It meant that the color of kermes dye produced from a scale insect kermes vermilio but the name is now sometimes also used as a genric term for slightly bluish-red colors that are b/w black h rose. | |
| 52765. |
CaCO3 |
| Answer» calcium carbonate | |
| 52766. |
Please explain concave and convex mirror |
| Answer» The spherical mirror whose reflecting surface is curved inwards is called a concave mirror.The spherical mirror whose reflecting surface is curved outwards is called a convex mirror. | |
| 52767. |
What is the magnification power of concave and convex mirror..?? |
| Answer» The ratio of height of image and that of object or ratio of distance of image and distance of object gives magnification. It is generally denoted by ‘m’.magnification formula = Height of image/height of obajectThe positive (+) sign of magnification shows that image is erect and virtual while a negative (-) sign of magnification shows that image is real and inverted. | |
| 52768. |
Which are the components the DNA molecule |
| Answer» The DNA molecule is composed of basic materials called as nucleotides and each nucleotide is composed of three different components such as sugar, phosphate groups, and nitrogen bases. Among the 3 components of DNA, the sugar is the one which forms the backbone of the DNA molecule. It is also called as deoxyribose. The nitrogenous bases of the opposite strands form hydrogen bonds, forming a ladder-like structure. | |
| 52769. |
Write a short note on transportation in plants |
| Answer» Plants have two different types of \'transport\' tissue. Xylem transports water and solutes from the roots to the leaves, phloem transports food from the leaves to the rest of the plant. Transpiration is the process by which water evaporates from the leaves, which results in more water being drawn up from the roots.Plant transportNo heart, no blood and no circulation, but plants do need a transport system to move food, water and minerals around. They use two different systems – xylem moves water and solutes from the roots to the leaves – phloem moves food substances from leaves to the rest of the plant. Both of these systems are rows of cells that make continuous tubes running the full length of the plant.Home > Science > OCR Gateway Additional Science (Pre-2011) > It’s a green world > Transport in plantsPrintScienceTransport in plantsPage: 12NextPlants have two different types of \'transport\' tissue. Xylem transports water and solutes from the roots to the leaves, phloem transports food from the leaves to the rest of the plant. Transpiration is the process by which water evaporates from the leaves, which results in more water being drawn up from the roots.Plant transportNo heart, no blood and no circulation, but plants do need a transport system to move food, water and minerals around. They use two different systems – xylem moves water and solutes from the roots to the leaves – phloem moves food substances from leaves to the rest of the plant. Both of these systems are rows of cells that make continuous tubes running the full length of the plant.XylemXylem cells have extra reinforcement in their cell walls, and this helps to support the weight of the plant. For this reason, the transport systems are arranged differently in root and stem – in the root it has to resist forces that could pull the plant out of the ground. In the stem it has to resist compression and bending forces caused by the weight of the plant and the wind. | |
| 52770. |
What ii heart |
| Answer» It is a pumping organ which pumps the blood to all parts of body for respiration(breakdown of glucose for obtaining energy) and bring back deoxygenated blood to lungs | |
| 52771. |
what is the valency of Na |
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Answer» 1 1 1 1 |
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| 52772. |
Name an animal which absorbs oxygen through its moist? |
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Answer» Frogs Amphibians-----frogs |
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| 52773. |
Why does distilled water not conduct electricity? |
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Answer» Because their is no free ions is present in distilled water. For passing of electricity, presence of icons is necessary, asthey facilitate electric flow..But in diltilled water, there are no ions, so current can\'t flow |
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| 52774. |
Why should chemical equation be balanced?? |
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Answer» According to, law of conservation of mass- Mass cannot be created nor destroy but it can transffered one form to another form . When we do equation balanced so, the no. of ractant=no. of product .So we should balanced equation because no. of reactant =no.of product .Example-2Mg +O2=2MgO In order to obey the law of conservation of mass in a chemical reaction which states that the total mass of reactants and products is same in a chemical reaction. |
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| 52775. |
Pb (NO3)2 + 2kI = 2KNO3 + PbI2 |
| Answer» | |
| 52776. |
Name the chemical used black and white photography |
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Answer» Either silver chloride or silver bromide 2AgBr{s}=2Ag+Br is used for black and white photography |
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| 52777. |
How do we see colours? |
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Answer» with the help of rods and cones cell rods cell respondto intensity of light and enable to see in dim light and cañ`t distinguish different colours and cone cell it respond the color but in dim light enable to see In bright light the cone cell active and distinguish dffrnt colors We identify colors by using specialized cells in our eyes called cones. The retina contains cells called rods and cones, which are sensitive to different colors of light. In fact, we’re not really seeing the colors themselves, but the reflections of the object’s colors.According to Live Science, “when light hits an object – say, a banana – the object absorbs some of the light and reflects the rest of it. Which wavelengths are reflected or absorbed depends on the properties of the object. For a ripe banana, wavelengths of about 570 to 580 nanometers bounce back. These are wavelengths of yellow light.” |
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| 52778. |
Write the electron of cao, Mgcl2,kcl,cacl2and Agcl3 |
| Answer» | |
| 52779. |
10 numericals of mirror formula |
| Answer» | |
| 52780. |
Why we fall ill |
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Answer» We fall ill because of diseases which is caused by microorganisms or improper food . because some cells of our body may be damaged and many reasons they do not work properly |
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| 52781. |
Explain why non metals do not react with dilute acid or water? |
| Answer» Answer is in book 2 chapter | |
| 52782. |
I want X class cbse complete notes chapterwise |
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Answer» Study ranker sap also is the best way for getting more notes. Download my cbse guide app from play store and find your notes. Get through thi app |
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| 52783. |
Explain the digestion of fat, carbohydrate and proteins in our body |
| Answer» Bile salts emulsify fats and oils into droplets, allowing enzymes to begin the chemical digestion of fats. ... Fats are broken down into fatty acids and glycerol, proteins into peptides and amino acids, and carbohydrates become simple sugars such as glucose and fructose. | |
| 52784. |
A 8 ohm resistance wire is doubled on itself find its new resistance |
| Answer» | |
| 52785. |
What is a balanced chamical equaton whay should chemical equation be balanced |
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Answer» It means no.of atom in reactant is equal to the no. of atom in product. The chemical equation that have same amount of atom present in R.H.S and equal to the L.H.S (products).The chemical equation should be balanced to maintain the laws of conservation of mass. Mass can neither be created nor be destoried. Balanced chemical equations means the no. of atoms in the reactant side is also equal to that of product side.We should balance a chemical equation to satisfy the law of conservation of mass,which states that the mass of reactants is equal to the mass of products in a chemical reaction . Also, mass is neither created nor destroyed , it can only be transferred from one form to another. A balanced chemical equation is an equation in which the number of atoms in each element in the reactants side is equal to that of the products side . A chemical equation is needed to be balanced to satisfy the law of conservation of mass. |
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| 52786. |
How do plants obtain food |
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Answer» Plant\'s obtain food in the form of by the process of photosynthesis By the process of photosynthesis Plants obtained food by the process of photosynthesis By the process of photosynthesis |
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| 52787. |
Name the unit used in selling electrical energy to consumers? |
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Answer» Killowatt hour Kilowatt hour |
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| 52788. |
What is the difference between Herbivorous and Human beings with respected ro Salivary gland? |
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Answer» Is that really difference?????? Herbivores: well-developed salivary glands which are necessary to pre-digest grains and fruits. Herbivores have alkaline saliva with ptyalin to pre-digest grains.Humans: well-developed salivary glands, which are necessary to pre-digest, grains and fruits. Humans have alkaline saliva with ptyalin to pre-digest grains. |
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| 52789. |
Where does actual exchange of gases takes place in lungs? |
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Answer» Alveoli It is in the alveoli that gaseous exchange takes place in lungs. Alveoli is the site where exchange of gases takes place . |
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| 52790. |
Nutrition in human beings . Briefly |
| Answer» This type of question is below | |
| 52791. |
What is cerebrum and its functions? |
| Answer» Cerebrum is also known as the brainstem its function its function is to relay signals coming from cerebellum. | |
| 52792. |
Explain the role of acids in our stomach |
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Answer» It also makes the medium acidic. The acid in our stomach helps to digest food Making acidic the food and kill the harmful bacteria |
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| 52793. |
A plant is producers as well consumers of oxygen.do you agree with this statement |
| Answer» Yes | |
| 52794. |
Why do we absorb hissing sound when calcium oxide reacts with water |
| Answer» Due to formation of co2 | |
| 52795. |
What is the ph value odf saliva after meal |
| Answer» It depends upon food which we eat | |
| 52796. |
Describe the formation of Sodium chloride with help of reaction. |
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Answer» Hcl + naoh = nacl + h2o this is the right one Na+cl=Nacl |
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| 52797. |
Why do our stomach does not secrets sulphuric acid |
| Answer» No any function in our body take place which need sulphuric acid | |
| 52798. |
Please explain oxidation and reduction reaction ,oxidizing agent ,reducing agent . How do they work |
| Answer» oxidation refers to adding of oxygen or removal of hydrogen from a compound .rrduction refers to loss of oxygen or gaining hydrogen atoms by a compound.oxidizing agent is a substance which losses oxygen and gains hydrogen or be ca say that oxidiing agent is the substance which oxidises other substances and reduces itself.reducing agent is a substance which gives hydrogen or gains oxygen or we can say that reducing agent is the substance which reduces other substances and oxidise itself | |
| 52799. |
Define metals and nonmetals on the basis of electronic view point. |
| Answer» Most of the metals conduct electricity and most of the non metal donot conduct electricity. | |
| 52800. |
Copper coins become green in moist air .why |
| Answer» Due to corrosion | |