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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.
| 56751. |
What is lindeman eule |
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| 56752. |
Asexsual example |
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Answer» Spirogyra,paramicium,hydra,amoeba Plants |
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| 56753. |
Explain froth flotation process |
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Answer» Nice explanation Nice yogita...good This method is employed for the concentration of sulphide ores. The finely powdered ore is added to water in a tank containing pine oil. The mixture is agitated by blowing a blast of air. The ore particle preferentially wetted by oil come to the surface with froth while impurities which are wetted with water become heavier and settle at the bottom. The oil froth containing mineral particles which floats on froth containing mineral particles which floats on the surface of the water can be skimmed off easily.Ex : The concentration of copper pyrites, galena are done by this method. |
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| 56754. |
In the artificial kidneys the tubes are all semipermeable living why |
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Answer» as we know that when we need to clear our blood we need to put out the waste material and taking the oxygen so semipermeable membrane does not allow every molecule of any element to pass through it Semipermeable membrane is not allow every object to pass through . lt only allows essential molecules like oxygen and CO2 to get through it it is semi-permeable because it controls the rate of osmosis. |
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| 56755. |
When is blood pressure high and when it is low and what is the reason behind it |
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Answer» A blood pressure reading lower than 90 millimeters of mercury (mm Hg) for the top number (systolic) or 60 mm Hg for the bottom number (diastolic) is generally considered low blood pressure. The causes of low blood pressure can range from dehydration to serious medical or surgical disorders. During ventricular contraction (systole) blood pressure is high as the blood is pumped into the arteries.During venticular relaxation (diastole) blood pressure is low. Answer please |
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| 56756. |
What is syngamy ? Is it similar to fertilisation? |
| Answer» Syngamy is similar to fertilisation.It is the process of fusion of two gametes to form zygote | |
| 56757. |
What is the define of electronegativity |
| Answer» Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself. An atom\'s electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. | |
| 56758. |
What is converging mirrors ? |
| Answer» Concave mirror | |
| 56759. |
Explain the Digestive System in human beings ? |
| Answer» Digestion: Digestion is the process by which food is broken down into simple absorbable substances. Digestion of food takes place in the digestive system. Digestive system is made up of alimentary canal and associated glands.\xa0Parts of alimentary canal: The mouth, oesophagus, stomach, small intestine and large intestine form the alimentary canal. It is also known as the digestive tract.Mouth is guarded by upper lip and lower lip. The process of taking in food through mouth is called as ingestion.Buccal cavity is the inner region of the mouth. It encloses teeth and tongue.Teeth are of different types namely, incisors, canines, premolars and molars.Incisors are used for biting food.Canines are sharp and pointed and are used to pierce or tear food.Premolars and molars are the principal grinders helping to chew and grind the food.Tongue is a muscular organ attached to the floor of the buccal cavity at the back. It helps in mixing of food with saliva and swallowing it. It also helps in tasting different types of food with the help of taste buds present on it. The buccal cavity leads into pharynx.Pharynx is at the back of buccal cavity. The pharynx is the common channel for food and air. When you swallow food, a flap-like valve called the epiglottis closes the windpipe. It prevents the entry of food particles into respiratory tract.Oesophagus also called as food pipe helps in conveying the food from buccal cavity to stomach. The oesophagus is also known as the gullet. It is about 25 centimetres long. Food inside the oesophagus reaches the stomach by peristalsis movements.Stomach is the widest part of the alimentary canal. It is a J-shaped muscular organ with stomach occurs with the help of digestive juice. Digestive juice comprises of hydrochloric acid, mucous and some enzymes.Small intestine is made up of three regions namely duodenum, jejunum and ileum. Partially digested food called the chyme from the stomach is received by the duodenum. Duodenum also receives bile form the liver, enzymes from pancreas and secretes some enzymes on its own. All these substances bring about digestion of food in the intestine. The inner walls of the small intestine have millions of small finger like projections called the villi. Villi increase the surface area for digestion as well as absorption of digested food by eight times.Large intestine comprises of colon and rectum. Undigested food is sent into large intestine. Water from the food is reabsorbed to a great extent in the large intestine. Undigested waste is stored in the rectum for defecation.**** is the opening of the alimentary canal to the exterior. This helps in the elimination of faeces by the process of egestion.Associated glands: These glands include salivary glands, gastric glands, intestinal glands, liver and pancreas.Salivary glands are present inside the buccal cavity. They secrete saliva. This saliva plays an important role in breaking down complex components like starch into simple sugars.Gastric glands present inside the stomach secrete gastric juice which helps in the digestion of food.Intestinal glands secrete various enzymes which aid in the process of digestion of food.Liver is the largest gland in our body. The liver secretes a yellowish green watery fluid called bile. It is temporarily stored in a sac called the gall bladder. Bile plays an important role in the digestion of fats. Bile is sent into duodenum through a narrow tube-like structure called the bile duct. Bile breaks the larger fat molecules into tiny droplets, thereby increasing their surface area, which helps in the digestion of fats easily.Pancreas is the mixed gland. It acts as a both endocrine and exocrine gland. The pancreas secretes the pancreatic juice that helps to digest carbohydrates, proteins and fats. The pancreatic juice converts carbohydrates into simple sugars and glucose, proteins into amino acids, and the lipids into fatty acids and glycerol. | |
| 56760. |
What a charge |
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Answer» Charge is the property of matter by which it exert force or experience force of electrical origin The rate of flow of current is called charge |
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| 56761. |
Is the topics, electric motor and generator not included in the CBSE syllabus?? |
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Answer» Electric generator nhi h motor h Ofcourse it is included yes or no??? Yes\' it is included in the cbse syllabus. Us. |
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| 56762. |
How do autotrophs obtain carbon di oxide and nitrogen to make the food |
| Answer» CO2 and N2 from atmosphere through stomata | |
| 56763. |
Alkane is homogeneous series are first member of name or formula |
| Answer» Methane,CH4 | |
| 56764. |
What is a hormones |
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Answer» Hormones are chemical substance which is secreted by endocrine gland directly into the blood to reach the target organ . Chemical secreted by endocrine Gland in blood The chemical substances secreted by endocrine glands in blood which determine functioning of body are hormones. |
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| 56765. |
All atomuc no. serial vise |
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| 56766. |
Everyone how your preparation are going on? im very tensed you all? ???? |
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Answer» I am tooooo You have 3 -2 day holidays in exam but we not have any holiday during exam ,exam continue without holiday... What to do ???? And there is fullcourse in all subjects Then one in social then one in science Nowdays Iam very tensed for half yearly exam. There is only 3 holidays in exam. One is in maths |
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| 56767. |
What is the full form if ddt |
| Answer» Ddt full form dichloro diphenyl tricholorothenes its mean non soluble hydrocarbon | |
| 56768. |
Thermite rxn. |
| Answer» 2Al + Fe2O3 = Al2O3 +2Fe | |
| 56769. |
How blood control body temperature |
| Answer» Blood is a very important substance . | |
| 56770. |
Which organism reproduces by spore formation? |
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Answer» Rhizopus or bread mould [underline the scientific name] Yeast Bread mould,mosess Eukaryotic organism like fungi , alge Rizopus ( bread mould) |
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| 56771. |
Out of 60 Watt and 40 Watt lamps which one has higher electrical resistance when used |
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Answer» 40 40 watt |
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| 56772. |
Carbon has main 3 properties that is why I t has infinite number of carbon compounds what are they |
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Answer» The three properties are-1)catenation2)tetravalency property of carbon3) tendency to form multiple bonds Catination |
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| 56773. |
What is succus entericus?? |
| Answer» Succus entericus is the intestinal fluid secreted in small intestine in small quantities. | |
| 56774. |
Why medium changes on changing the speed of light |
| Answer» Because of density | |
| 56775. |
What is wave theory |
| Answer» The light consists of electromagenatic wave which not required medium like sold,liquid and gas for their propogation called wave theory. | |
| 56776. |
What is meyosis |
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Answer» Meiosis is a type of cell division in which a diploid (2n chromosome) divides to form two haploid cell (n chromosome). These are gametes Cell division reduces chromosome in cell body in reproduction is called meiosis |
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| 56777. |
Name phytohormone with functions |
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Answer» What are the main functions of plant hormones?Originally Answered: What are the function of plant hormone?Plant Hormones are the plant growth regulators. They require in small amount but necessary for functioning of Plants.There are several Plant Hormones classes, namely, Auxin, Cytokinin, Gibberellin, Abscisic Acid, Ethylene.Here are the functions of plant hormones in short.Functions of Auxin : Cell enlargement, apical dominance, prevention from bending; promote xylem differentiation, healing of wounds of plants.Applications of Auxin include - root initiation in callus during plant tissue culture, application of auxins to induce parthenocarpy etc.Function of Cytokinin : promote cell division, apical dominance, delay in senescenes ( aging ), phloem transport, accumulation of salts in cells, production of female flowers, increase resistance to extreme temperatures and diseases.Applications of Cytokinin include - stem initiation in callus during plant tissue culture, disease resistant varieties in genetically modified cropsFunctions of Gibberellin : promote increase in fruit size, inter-nodal elongation, seed germinationApplications of Gibberellin include - dose of Giibberellin during parthenocarpy, production of male flowers on genetically female plants, breaking dormancy of seed, bud, tuber etc.Functions of Abscisic Acid : abscission of leaves, reduce transpiration, inhibit cambium activity, bud dormancy in seed during winter, seed development and maturation, induce flowering in some SDPs, synthesis of carotenoids in green organsFunctions of Ethylene : inhibit stem elongation; promote fruit ripening, increase girth of stem, speed of senescence, abscission of leavesApplications of Ethylene - artificial ripening of fruits, sprouting of storage organs. Auxin, cytokynine, gibberlins, absisic acid In nastic movement parasitics plant moves towards the light energy |
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| 56778. |
Important chapters of physics for half yearly |
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Answer» Electricity, magnetic effect of current Magnetic effects of electric current |
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| 56779. |
Describe functioning of nephron |
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Answer» Yes u r right and it also helps in seperating waste products It is the main function of purify bllod |
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| 56780. |
Why do we prefera convex as a rear view mirror in vehicles ? |
| Answer» Beacause convex mirror show virtual erect and diminished image. Also driver is able to get a wider view of behind | |
| 56781. |
Which of the following is arranged in the increasing order of enthalpy of vaporisation NH3 As3 PH3 |
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| 56782. |
What is the chemical equation for methane |
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Answer» Ch4 Ch4 CH3 |
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| 56783. |
Nacl+H2so4+Mno2- |
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| 56784. |
Na+cl2= |
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Answer» 2Na + cl2= 2NaCl (balanced) 2na+cl2=2nacl |
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| 56785. |
What is antioxidant? |
| Answer» A substance or a compound which inhibits the oxidation of other substances is referred as antioxidant. Oxidation of compounds produces reactive intermediates which are harmful. So antioxidants prevent oxidation and formation of reactive substances. These are also added to food materials containing fats and oils to prevent their oxidation. Oxidation of food materials containing fats and oils is known as rancidity, because of which they become unfit for consumption and develop bad odour. Normally, vitamin C and vitamin E are added as antioxidants. Certain complex organic molecules like BHA and BHT are also very commonly used as antioxidants. | |
| 56786. |
Why gypsum is known as hydrated salt? |
| Answer» It can be used interchangeably with natural gypsum in some applications. Gypsum also precipitates onto brackish water membranes, a phenomenon known as mineral salt scaling, such as during brackish water desalination of water with high concentrations of calcium and sulfate | |
| 56787. |
Explain excretion ? |
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Answer» The biological process involved in the removal of harmful nitrogenous metabolic waste from the body through urethra is called excretion Removing of nitrogenous waste and non- nitrogenous and fasces waste. |
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| 56788. |
By which method we can remove the oxide layer on reactive metal? |
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Answer» Corrosion method The layer that is formed is called corrosion and to prevent corrosion the methods are galvanization and painting on the metal |
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| 56789. |
By the color of copper sulphate solutions changes when an iron nail is kept immersed in it |
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Answer» Cuso4 + Fe = Feso4 + Cu Cuso4 get reacted wuth iron Cuso4 + fe → feso4 + cu |
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| 56790. |
How many valence electrons are there in a carbon |
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Answer» 4 in the outer most shell 4 4 4 valence electrons are therr in c |
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| 56791. |
write IUPAC name of the following compound ch3-ch2-Br |
| Answer» Bromo ethane , which is also known as ethyl bromide | |
| 56792. |
Why should a magnesium ribbon be cleaned before burnig in air? |
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Answer» It is cleaned to remove the particles that are corroded in it.If the particles are not cleaned then it will not react in air When magnesium ribbon reats with oxygen then it forms a layer in its surface thats why magnesium ribbon is cleaned before burning It is clean to remove the protective layer of Mgo To remove layervif MgO |
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| 56793. |
Why did heredity take place |
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| 56794. |
Define quarks |
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| 56795. |
What is mean by molcular mass |
| Answer» Molecular mass is the mass of a single molecule, given in atomic mass units (amu). | |
| 56796. |
Liver infection |
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| 56797. |
How is urine produced and eliminated |
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Answer» Urine is produced by kidneys by the process of filtration of blood by nephrons in kidney. Urine is a form a nitrogenous waste. The urine is then passed to the bladder by ureter where it is stored and then removed through urethera. Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body. |
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| 56798. |
Advantages of parallel combination over series combination |
| Answer» Nice question | |
| 56799. |
Plastic |
| Answer» Plastic is a synthetic material which can be moulded into desired shape when soft and then hardened to produce a durable article. | |
| 56800. |
Explain double fertilization |
| Answer» Vbps class 10 | |