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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.
| 1051. |
What is diffusion process? |
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Answer» The movement of particles from from higher concentration to low concentration is called diffusion Diffusion means movement of molecules mixing of two substance called diffusion Diffusion is the net movement of molecules of a substance from a region of their higher concentration to a region of their lower concentration. Net movement means there are more molecules moving in one direction than in the opposite direction.Example: Opening a bottle of perfume in a room will result in the gradual diffusion of the perfume from the region of higher concentration (the bottle) out into the room. Diffusion will continue until the perfume has a more or less uniform concentration throughout the bottle and room. The movement of air from higher concentration to lower concentration |
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| 1052. |
What are receptors? Where are they located?Name them and write their functions. |
| Answer» \tReceptors are the sensing molecules or elements which communicate the signal from a ligand to the cell to elicit specific physiological change.\tThey are located in the cells, tissues and help to control all most all the body organs.\tThe ligand is the one which binds to the receptor and brings in conformational changes to produce a definite effect on the body’s physiology.\tIn general, most receptors have endogenous ligands or biomolecules which can trigger a response.\tMost receptors are named based on their endogenous ligands like serotonin receptors, acetylcholine receptors, opioid receptors. | |
| 1053. |
Aluminum is highly reactive metal ,still it is used to make utensils for cooking. |
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Answer» Al + moist = Al2O3Which prevent it from further corrosion Aluminium metal forms a thin layer of aluminium oxide all over its surface under the action of moist air. This layer prevents the metal underneath from further corrosion. It is cheap, easily available, malleable and ductile. Therefore, it is used to make utensils for cooking. |
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| 1054. |
If mercury is a bad conductor of heat then why it is used in thermometers |
| Answer» Mercury\xa0is a heavy, silvery-white liquid metal. Compared to other metals, it is a\xa0poor conductor of heat. Even\xa0if\xa0it is a\xa0poor conductor of heat, It\'s\xa0used in thermometers\xa0because it has high coefficient of expansion. ... It has a shiny surface and doesn\'t get stick to the glass surface of the\xa0thermometer. | |
| 1055. |
Explain electrolytic refining of metal |
| Answer» Electrolytic refining\xa0is a technique that is used for the extraction and purification of\xa0metals\xa0that are obtained by\xa0refining\xa0methods. The impure\xa0metal\xa0is used as an anode and the pure\xa0metal\xa0is used a cathode. Soluble salt from the same\xa0metal\xa0is used an\xa0electrolyte.\xa0Electrolytic refining\xa0is the process of\xa0refining\xa0impure metals by using electricity. ... A solution of a soluble salt of the same metal is taken as the\xa0electrolyte.\xa0Example- Copper can be purified by this way. In\xa0electrolytic refining\xa0of copper, the\xa0electrolyte\xa0is a solution of acidified copper sulphate. | |
| 1056. |
What are the various methods used for the refining of metals |
| Answer» The most widely used method for refining impure metals is electrolytic refining. Electrolytic refining means refining by electrolysis. Metals such as copper, zinc, tin, lead, chromium, nickel, silver and gold are refined electrolytically.\xa0\tFor refining an impure metal by electrolysis: A thick block of impure metal is made the anode. A thin strip of pure metal is taken as the cathode. A water soluble salt is taken as the electrolyte. On passing current through the electrolyte, the impure metal from the anode dissolves into the electrolyte. An equivalent amount of pure metal from the electrolyte is deposited on the cathode. The soluble impurities go into the solution, whereas the insoluble impurities settle down at the bottom of the anode and are known as the ‘anode mud’. | |
| 1057. |
Explain electrolytic refining of metals for 6 marks answer |
| Answer» Extraction of copper metal:In an electrolytic tank, acidified copper sulphate (CuSO4 + dilute H2O4) solution forms the electrolyte. A block of impure copper is made into an anode by connecting the positive terminal of a power supply (battery). A thin strip of highly pure copper metal is the cathode of the cell. The negative terminal of the power supply is connected to it.A small electric current is passed through the cell. Atoms from the anode enter the electrolyte. The copper from the anode gets converted into copper sulphide. An equal number of copper atoms from the solution get deposited on the cathode. This is to keep the concentration of the solution constant. Impurities from the anode block either remain in solution or collect below the anode, as they are unable to displace copper form the sulphate solution. The impurities remain insoluble in the electrolyte and they are called anode mud.Copper sulphate solution contains ions of Cu++ and SO4--. The following reactions take place at the anode and cathode when an electric current is passed. | |
| 1058. |
What is the role of DNA in sexual and asexual reproduction? |
| Answer» Both male and female parent contributes equally to the DNA of the progeny during sexual reproduction. When the germ cells combine, they will restore the normal number of chromosomes in the progeny, ensuring the stability of the DNA of the species. DNA is the genetic material and it is responsible for the transmission of characters\xa0from parents to\xa0the offsprings. Even the *** of the individual is determined genetically in humans. | |
| 1059. |
What is difference between balanced and balancing equation |
| Answer» Balanced equation means the atoms on both the reactants and product side are equal. Balancing equations means that we need to balance it because atoms of reactants and products are not equal Hope you understand | |
| 1060. |
How do we find out that what range of fuse should be connected in a circuit of any current? |
| Answer» Current rating\xa0is the maximum\xa0current\xa0that a\xa0fuse\xa0will carry for an indefinite period without too much deterioration of the\xa0fuse\xa0element. A wide range of power switching transistors are also available, with\xa0current rating\xa0up to several hundred amperes and voltage\xa0ratings\xa0well over 1000V.\xa0To test a fuse without multimeter, take a flashlight equipped with a flat battery. Unscrew the bulb and get the battery. Place the\xa0fuse\xa0of one of the battery “blades” and the base of the bulb on the other side of the\xa0fuse. Put the bulb pad in contact with the second “blade” of the battery. | |
| 1061. |
Veins don\'t have blood pressure. Still the blood flows through it. Explain with a diagram |
| Answer» Since pressure in the veins is normally relatively low, for blood to flow back into the heart, the pressure in the atria during atrial diastole must be even lower.So this means that veins have blood pressure.\xa0Blood flows in the same direction as the decreasing pressure gradient: arteries to capillaries to veins. ... As vessel diameter decreases, the resistance increases and blood flow decreases. Very little pressure remains by the time blood leaves the capillaries and enters the venules. | |
| 1062. |
Later displacement |
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Answer» Lateral Displacement is the perpendicular distance between the emergent ray from a glass slab and the incident ray produced forward.When the perpendicular distance between the original path traced by an incident ray and the path traced by the emergent ray coming out from the glass slab is known as lateral displacement.Following are the factors on which lateral displacement depends:\tThe thickness of the glass slab\tRefractive index of the glass slab\tThe angle at which incident ray enters the glass slab Give me answer |
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| 1063. |
Digestion of food which types of reaction |
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Answer» Decomposition reaction because the food entre our body and they breakdown in many differeny substance. In different parts of body Decomposition Reaction \xa0\tDigestion of food in our body is a decomposition reaction.\tDecomposition reaction is a type of chemical reaction in which single compound splits into two or more simple substances.\tIn digestion of food carbohdratess, proteins, fats dcomposes to simple substaces that provide energy to do work. |
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| 1064. |
How can we identify strong base and weak base ?? |
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Answer» When any acid higher h+ ions so it is strong acidWhen any base have higher OH- ions so it is strong base A\xa0strong base\xa0is a\xa0base\xa0that is 100% ionized in solution. If it is less than 100% ionized in solution, it is a\xa0weak base.\xa0 |
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| 1065. |
Decomposition reaction called the opposite of combination reaction and equation for this reaction |
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Answer» In Decomposition reaction a single substance decomposes to form two or more substances which is exact opposite of Combination reaction in which two or more reactants combine to form a single product that is why decomposition reactions called the opposite of combination reactions. For examplesDecomposition reaction:Combination Reaction:\xa0 Yes |
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| 1066. |
How can we identify strong acid and weak acid ?? |
| Answer» Lower the ph is strong acid .higher the ph is weak acid | |
| 1067. |
What is difference between arteries and veins |
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Answer» 1) Arteries carry blood away from heart and veins bring blood toward heart2) Arteries contain oxygenated blood but veins contain deoxygenated blood \tArteriesVeinsCarry blood away from the heartCarry blood towards the heartCarry oxygenated bloodCarry deoxygenated bloodRed in colour due to oxygenated bloodBlue in colour due to deoxygenated bloodLocated deep in the bodyLocated close to the skin\t |
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| 1068. |
Carbon and it\'s compound pdf |
| Answer» | |
| 1069. |
Name phytohormones and write their functions |
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Answer» The plants do not have a nervous system and sense organs like ear ,nose ,mouth,etc like the animals , but they can still sense things.The plants coordinate their behavior against environmental changes by using hormones.The functions of control and coordination in plants is performed by certain chemical substances.These chemical substances are called plant hormones or phytohormones.There are four major types of plant hormones [phytohormones] . which are involved in the\xa0control and coordination in plants.These are :1)Auxins2)Gibberellins3)Cutokinins4)Abcisic acid1)Auxins are the plant hormones which promote cell enlargement and cell\xa0differentiation.\xa0Auxins also promote fruit growth.\xa0Auxin hormone is responsible for phototropic and geotropic responses of plants.2) Gibberellins are plant hormones which\xa0promote cell enlargement and cell\xa0differentiation in the presence of auxins.\xa0Gibberellins help in breaking the dormancy in seeds and buds. They also promote fruit growth.\xa0Gibberellins stimulates elongation of shoots of various plants3) Cytokinins\xa0are plant hormones which promote cell division in plants.They also help in\xa0breaking the dormancy in seeds and buds. The delay the ageing of leaves.Cytokinins promote opening of stomata .4)Abscisic acid (ABA) is a plant hormone which functions mainly as a growth inhibitor.\xa0Abscisic acid promotes the dormancy in seeds and buds [ this is the opposite of breaking the dormancy]. It\xa0also\xa0promotes closing of\xa0stomata. Abscisic acid promotes falling of leaves. Plants need sunlight, water, oxygen, minerals for their growth and development. These are external factors. Apart from these, there are some intrinsic factors that regulate the growth and development of plants. These are called plant hormones or “Phytohormones”.The various functions performed by the plant hormones are:\tAuxins promote cell enlargement and cell differentiadon. They also promote growth.\tGibberellins promote cell enlargement and cell differentiation in the presence of auxin. It also help in breaking the dormancy in seeds and buds. It promote the growth in fruits.\tCytokinins promote cell division and help in breaking the dormancy of seeds and buds. It delay the ageing in leaves. It promotes the opening of stomata and also fruit growth.\tAbscisic acid promotes the dormancy in seeds and buds. It promotes the closing of stomata and falling of leaves. Inhibits growth, reverses the growth promoting effects of auxins and gibberellins. Its effects include wilting of leaves.\tEthylene promotes the falling of leaves, ripening of fruits and helps in breaking bud dormancy. |
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| 1070. |
Difference between unisexual and bisexual plants |
| Answer» \tBisexual flowerUnisexual flower1. It is also known as complete flower.1. It is also known as incomplete flower.2. It contains both male and female reproductive system.2. It contains either male or female reproductive system.3. E.g.\xa0Hibiscus3. E.g. Palm\t | |
| 1071. |
Meaning of brine |
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Answer» Brine is solution of saltMainly sodium chloride NaCl Brine is a solution of table salt in water Solution of NaCl |
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| 1072. |
Syllabus of 10 |
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| 1073. |
Explain structure of nephron |
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Answer» Structure of Nephron :- Nephron is the filtration unit of kidney. It consists of a trouble which is connected with collecting duct at one end and a cup-shaped structure at the other end. Tdvjkgdg \xa0\tA kidney is composed of an enormous number of\xa0uriniferous tubules. They are also known as\xa0nephrons\xa0or\xa0renal tubules\xa0or\xa0kidney tubules.\tNephrons are the structural and functional units of the kidney.\tEach kidney is formed of about 1 million nephrons.\tNephrons are held together by a connective tissue.Structure of nephron:\tEach nephron is made of a glomerulus and a renal tubule.Glomerulus:\tIt is a\xa0tuft of anastomosing blood capillaries\xa0formed by the fine branches of the\tafferent arteriole.\xa0\tThese capillaries of the glomerulus again unite to form the\xa0efferent arteriole.\tThe afferent arteriole is wider than the efferent arteriole.\tThe afferent arteriole brings blood into the glomerulus, while the efferent arteriole collects blood from the glomerulus.Renal Tubule:The renal tubule comprises the following regions:Bowman’s Capsule\tThe Bowman’s capsule lies in the cortex.\tIt is a thin double-walled, cup-like depression.\tIt is the blind end of the nephron.\tThe glomerulus is located in the concave depression of the Bowman’s capsule.\tThe Bowman’s capsule and the glomerulus together are called Malpighian Capsule or Renal Capsule.\tThe outer layer of the Bowman’s capsule is made of flattened epithelial cells.\tThe inner layer is in close contact with the glomerulus and bears special cells called podocytes.\tPodocytes have many feet-like processes called pedicels and minute slit-like pores called slit pores.Proximal Convoluted Tubule (PCT)\tPCT lies in the\xa0cortex.\tIt is also known as the\xa0first convoluted tubule.\tThe Bowman’s capsule continues into the PCT.\tIt is lined with a layer of columnar epithelial cells.\tThe columnar cells are with numerous microvilli to increase the surface area of absorption. Loop of Henle\tIt lies in the\xa0medulla.\tIt is U-shaped.\tIt is not convoluted.\tIt has a descending limb and an ascending limb.\tEach limb has a thick region towards the cortex and a thin region towards the medulla.\tThick regions are lined with columnar epithelial cells.\tThin regions are lined with flat epithelial cells. Distal Convoluted Tubule (DCT)\tIt lies in the\xa0cortex.\tIts short terminal part is called a collecting tubule.\tThe collecting tubule opens into the\xa0collecting duct.\tDCT in lined with ciliated columnar epithelial cells.\tThe\xa0collecting duct\xa0receives the contents of many renal tubules.\tThe\xa0collecting duct\xa0is a larger duct which receives collecting tubules of several nephrons.\tCollecting ducts pass into the renal medulla and join with each other to form the\xa0ducts of Bellini.\tThe ducts of Bellini run through the renal pyramids and open into calyces.\tAll calyces open into the pelvis.\tFrom the pelvis, urine is carried to the urinary bladder through the ureters. |
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| 1074. |
Symbol of sodium |
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Answer» Na Na Sodium\xa0gets its name from the English word soda. This is because Sir Humphry Davy used caustic soda when isolating the element. The symbol\xa0Na\xa0comes from the Latin word natrium.\xa0Sodium\xa0is an important nutrient for health. It plays a vital role in nerve and muscle function and helps\xa0your body\xa0maintain normal fluid balance.\xa0Sodium\xa0is used as a heat exchanger in some nuclear reactors, and as a reagent in the chemicals industry. But\xa0sodium\xa0salts have more uses than the metal itself. The most common compound of\xa0sodium\xa0is\xa0sodium\xa0chloride (common salt). It is added to food and used to de-ice roads in winter. Na Na |
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| 1075. |
What is Magnetic current? |
| Answer» The term "magnetic effects\xa0of\xa0current\xa0" means that " a\xa0current\xa0flowing in a wire produces a\xa0magnetic\xa0field round it ". the\xa0magnetic effect\xa0of\xa0current\xa0was discovered by Oersted found that a wire carrying a\xa0current\xa0was able to deflect a\xa0magnetic\xa0needle.\xa0Moving\xa0magnetic\xa0fields pull and push electrons. Metals such as copper and aluminum have electrons that are loosely held. Moving a\xa0magnet\xa0around a coil of wire, or moving a coil of wire around a\xa0magnet, pushes the electrons in the wire and creates an electrical\xa0current. | |
| 1076. |
How do metals react with acid and base? Give chemical equations also. |
| Answer» When an\xa0acid reacts\xa0with\xa0metal, a salt and hydrogen\xa0are\xa0produced:\xa0acid\xa0+\xa0metal\xa0→ salt + hydrogen An example: nitric\xa0acid\xa0+ calcium → calcium nitrate + hydrogen The salt that is produced depends upon which\xa0acid\xa0and which\xa0metal react.\xa0When\xa0base reacts with metal, it produces respective salt and hydrogen gas. The presence of hydrogen gas is confirmed by a pop sound that is produced by hydrogen gas when it comes in contact with fire. Sodium hydroxide gives hydrogen gas and sodium zincate when\xa0reacts\xa0with zinc\xa0metal. | |
| 1077. |
Explain the different cases of refraction with the help of suitable diagram |
| Answer» Atmospheric refraction is the phenomenon of bending of light on passing through the Earth’s atmosphere. The reason for this occurrence is that the upper layers of the Earth’s atmosphere are rarer compared to the lower layers. On account of atmospheric refraction of light,\xa0\tThe stars seem higher than they actually are.\tThe Sun appears to rise 2 minutes before and set 2 minutes later, increasing the apparent length of the day by 4 minutes.\tThe Sun appears oval at sunrise and sunset, but appears circular at noon.\tThe stars twinkle and planets do not. | |
| 1078. |
What is double circulation system? |
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Answer» It is known as double circulation because it involved two types of circulation (I)systemic circulation(direction of blood from body to heart)(I) pulmonary circulation (direction of blood from heart to lungs)? \xa0\tDouble circulation is a process during which blood passes twice through the heart during one complete cycle. This type of circulation is found in amphibians, reptiles, birds, and mammals. However, it is more prominent in birds and mammals as in them the heart is completely divided into four chambers – the right atrium, the right ventricle, the left atrium, and the left ventricle.The movement of blood in an organism is divided into two parts:(i) Systemic circulation(ii) Pulmonary circulation\tSystemic circulation involves the movement of oxygenated blood from the left ventricle of the heart to the aorta. It is then carried by blood through a network of arteries, arterioles, and capillaries to the tissues. From the tissues, the deoxygenated blood is collected by the venules, veins, and vena cava, and is emptied into the left auricle.\tPulmonary circulation involves the movement of deoxygenated blood from the right ventricle to the pulmonary artery, which then carries blood to the lungs for oxygenation. From the lungs, the oxygenated blood is carried by the pulmonary veins into the left atrium.Hence, in double circulation, blood has to pass alternately through the lungs and the tissues.\tSignificance of double circulation:The separation of oxygenated and deoxygenated blood allows a more efficient supply of oxygen to the body cells. Blood is circulated to the body tissues through systemic circulation and to the lungs through the pulmonary circulation. |
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| 1079. |
Which as is evolved when lead nitrate is heated |
| Answer» When lead(II) nitrate is heated, it breaks down into yellow colour lead (II) oxide, colourless gas of oxygen and brown colour nitrogen dioxide. The chemical equation for the above reaction is,2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂ | |
| 1080. |
Define stomach |
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Answer» Stomach is a bag like structure located at the left side of upper abdomen it a type of big gland which contains small glands that secretes a number of juices to digest the foods ???? The stomach is a muscular organ located on the left side of the upper abdomen. The stomach receives food from the osophagus. As food reaches the end of the esophagus ,it enters the stomach through the muscular valve called the lower esophageal sphincter. The stomach secrets acid and enzyme that digest food. |
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| 1081. |
Define chloride |
| Answer» Chloride\xa0is one of the most important electrolytes in the\xa0blood. It helps keep the amount of fluid inside and outside of your cells in balance. It also helps maintain proper\xa0blood\xa0volume,\xa0blood\xa0pressure, and pH of your\xa0body\xa0fluids. ... Most of the\xa0chloride\xa0in your\xa0body\xa0comes from the salt (sodium\xa0chloride) you eat.\xa0Chloride\xa0is an electrolyte that helps balance the amount of fluid inside and outside of cells. It also helps maintain blood volume, blood pressure, and the pH of body fluids. | |
| 1082. |
Which is the softest metal |
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Answer» Sodium potassium and lithium Sodium pottasium lithum |
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| 1083. |
Which is hardest metal |
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Answer» Diamond is not a metal. Diamond Diamond Thankyou Diamond |
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| 1084. |
What is Resistance aur potential difference . |
| Answer» \xa0ResistanceResistance is a property of conductor due to which it resists the flow of electric current through it. Component that is used to resist the flow of electric current in a circuit is called resistor.Potential difference:\xa0The difference in the amount of electric potential energy between two points in an electric circuit is called ELECTRIC POTENTIAL DIFFERENCE. | |
| 1085. |
Why Magnesium ribbon is rubbed before burning? |
| Answer» When exposed to air many metals will slowly react with oxygen in the atmosphere to form metal oxides and magnesium is one of those metals. Like rusting in case of iron, with magnesium, the oxide layer forms a white coating on the outside of the metal that will slow down or interfere with the burning process. Rubbing with sand paper helps to remove this oxide layer due to which burning speeds up. | |
| 1086. |
Gaiv prakarm kise Khte hain? |
| Answer» Life process means the basic function perform by a living organisms to alive on the earth are called life process | |
| 1087. |
How we are able to see nearby and also distant object clearly |
| Answer» We are able to see nearby object cleary to the ability to the eye lens to adjust is focal length which is known as power of accommodation | |
| 1088. |
List important ways which you can make chemical equation more influencibe |
| Answer» A chemical equation can give more informations in the following ways:\tThe physical state of the reactants and products can be indicated by putting (s) for solid, (l) for liquid, (g) for gas and (aq) for aqueous state.\tEvolution or absorption of heat during the reaction can be denoted by adding or subtracting a heat term on the product side.\tTemperature, pressure and catalyst can be indicated above the arrow (→ or =) separating the reactants and products.\tConcentration of reactants and products are indicated by adding word (dil) for dilute and (cone) for concentrated before their formulae.\tBy the sign → or\xa0\xa0information about irreversible and reversible reactions can be obtained. | |
| 1089. |
What is dead burnt plaster |
| Answer» When, gypsum(CaSo4.2H2O) is heated above 100° C then plaster of paris is converted into anhydrous calcium sulphate (CaSo4) and dead burnt plaster is formed. | |
| 1090. |
How can solved balance chemical reaction from method of A B C |
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| 1091. |
Write all the chemical formula in chemistry and their symbols |
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| 1092. |
Mention any three methods adopted by plants to minimise to transpiration rate |
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Answer» Hey \xa0Plants reduce water loss by closing their stomata, developing thick cuticles, or by possessing leaf hairs to increase the boundary layer.i) The stomata are the primary control mechanisms that plants use to reduce water loss and they are able to do so quickly. Stomata are sensitive to the environmental cues that trigger the stomata to open or close.\xa0Some plant species have stomata on both sides of the leaf while others have stomata on the lower leaf surface to minimize water loss. Special cells called guard cells control each pore’s opening or closing. When stomata are open, transpiration rates increase; when they are closed, transpiration rates decrease. Stomata are the only way plants can control transpiration rates in the short-term.ii) The boundary layer is a thin layer of still air hugging the surface of the leaf. This layer of air is not moving. For transpiration to occur, water vapor leaving the stomata must diffuse through this motionless layer to reach the atmosphere where the water vapor will be removed by moving air. The larger the boundary layer, the slower the rates of transpiration. Plants can alter the size of their boundary layers around leaves through a variety of structural features. Leaves that possess many hairs or pubescence will have larger boundary layers; the hairs serve as mini-wind breaks by increasing the layer of still air around the leaf surface and slowing transpiration rates. Some plants possess stomata that are sunken into the leaf surface, dramatically increasing the boundary layer and slowing transpiration. Boundary layers increase as leaf size increases, reducing rates of transpiration as well.iii) The cuticle is the waxy layer present on all above-ground tissue of a plant and serves as a barrier to water movement out of a leaf. Because the cuticle is made of wax, it is very hydrophobic; therefore, water does not move through it very easily. The thicker the cuticle layer on a leaf surface, the slower the transpiration rate. Cuticle thickness varies widely among plant species. In general, plants from hot, dry climates have thicker cuticles than plants from cool, moist climates. In addition, leaves that develop under direct sunlight will have much thicker cuticles than leaves that develop under shade conditions. Sun leaves have much thicker cuticles than shade leaves causing slower rates of transpiration. |
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| 1093. |
Write two Equations for the skeletal and word equations |
| Answer» Write word equations for the following skeletal equations:(a) KClO3\xa0→ KCl + O2(b) Zn + HCl → ZnCl2\xa0+ H2(c)FeCl2\xa0+ Cl2\xa0→ FeCl3(d) CO + O2\xa0→ CO2(e) Ca + O2\xa0→ CaO(f) Na + O2 → Na2O(g) NaOH + H2SO4\xa0→ Na2SO4\xa0+ H2O(h) AgBr → Ag + Br2(i) KNO2\xa0→ KNO2\xa0+ O2Answers:(a) 2KClO3 → 2KCl+ 3O2(b) Zn + 2HCl → ZnCl2\xa0+ H2(c) 2FeCl2\xa0+ Cl2\xa0\xa0→ 2FeCl3(d) 2CO + O2 → 2CO2(e) 2Ca + O2\xa0→ 2CaO(f) 4Na + O2 →\xa02Na2O(g) 2NaOH + H2SO4 →\xa0Na2SO4\xa0+ 2H2O(h) 2AgBr →\xa02Ag + Br2(i) 2KNO3 →\xa02KN02\xa0+ O2 | |
| 1094. |
Write two Equations for the balanced chemical equations |
| Answer» Two equations for balanced chemical equations are as follows :--A... 2Mg +O2 -–-–-–-–> 2MgOB... C +O2-–-–-–-––-> CO2 | |
| 1095. |
What is full form of SCHOOL If u give answer I gave u $10 |
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Answer» No this is not correct full form of SCHOOL S – SevenC – Crucial H – HoursO – OfO – OurL – Life S-SINCERTYC-CAPACITYH-HONESTYO-ORDERLINESSO-OBIDENCEL-LEARNING |
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| 1096. |
From where plants take their food |
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Answer» Bhai vo apnai aap food banatai hai Plants make their own food from simple inorganic substances such as carbon dioxide and water with the help of chlorophyll and sunlight......☀️☀️??? Plant get their food from organic compound carbon di oxide,water, Sunlight this process called photo synthesis |
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| 1097. |
What is the meaning of electrolysis ???Give one example. |
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Answer» See in the book The reaction in which H2O is seperated into Hydrogen and oxygen by the use of electricity is called electrolysis. Elaectrolysis is a kind of decomposition reaction in which energy is absorbed in form of electricity . Those reaction carried out in electricity is known as electrolysis. By Anand sagar |
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| 1098. |
Define the principal focus of a concave length |
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Answer» Ans.\xa0Principal focus of a concave mirror is the point on its principal axis, where light rays coming parallel to principal axis actually converge after reflection from mirror. Principal focus of Concave lens:\t‘The concave lens’ is the\xa0diverging lens.\tWhen the “parallel rays of light” passes through the concave lens where the\xa0‘refracted rays diverge’ so that they can appear to come from a single point called “the principal focus”. \tThere is some distance between\xa0“the principal focus” and “the centre of the lens”, which is called ‘the focal length’. |
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| 1099. |
What is compund |
| Answer» CompoundsCompound is a pure substance made up of two or more elements combined chemically in a definite ratio.Characteristics: 1. The properties of compound differ from those of its constituents. 2. Compound has fixed melting point and boiling point. 3. Compound is a homogeneous substance. 4. Constituent elements can be separated by chemical process. | |
| 1100. |
how to reproduce human |
| Answer» The sexual reproduction in animals takes place in the following steps:(i) The male parent produces male gamete called sperms. The sperm is a small cell with a long tail (flagellum) for movement.(ii) The female parent produces female gamete called ova which is much bigger cell than the sperm, having a lot of cytoplasm.(iii) The sperm enters into the ovum and fuses with it to form a new cell called zygote and this process is called fertilisation.(iv) The zygote then divides again and again to form a large number of cells and ultimately the zygote grows and develops to form a baby.\xa0 | |