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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.
| 53301. |
By giving example prove that rest and motion are relative terms. |
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| 53302. |
What is the means |
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| 53303. |
How do autotrophs obtain CO2 and N2 to make their food |
| Answer» Autotrophs obtain carbon dioxide from air present in atmosphere and nitrogen is obtained from soil. | |
| 53304. |
What do you understand by degree of ionisation |
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| 53305. |
Calculate number of electrons constitute in 1 column of charge? |
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Answer» Given=1C, Electron= 1.6×10^-19C1c=n× 1.6×10^-19Cn=1/(1.6×10^-19)=6.25×10^18electron e=1.6×10^-19Cn=Q/e =1/1.6×10^-19 =100/16×10^18 =6.25×10^-18 electron |
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| 53306. |
What is Enzymes ? |
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Answer» Enzymes are biological catalyst which alter the rate of reaction.Enzymea are biological catalyst which increase or decrease the rate of reaction. Enzymes is a acid which help for food digestion Enzyme is a biological catalyst which increase the reaction . A bioligical catalyst which helped in digestion of food is known as enzymes |
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| 53307. |
What is a chemical formula for plaster of paris????? |
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Answer» Chemical formula of plaster of Paris is CaSo4*1/2H2o CaSo*4.1/2H*2O Chemical formula for plaster of paris is CaSO4.1/2H2O CaSo4 *1/2H2o I don\'t know |
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| 53308. |
Which is largest cell in our body and full form of A.T.P. |
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Answer» Ovum ATP:- Adinosine Triphosphate. Here someone write Nerve cell which is totaly wrong. Nerve cell is longest cell in our body. Ovum is the largest cell in our body .it is 100% right. Nerve cell Full form is Androsine Tri-Phospate Nerve cell |
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| 53309. |
What are xanthophylls? |
| Answer» Carotenoids with molecules containing oxygen are knoen as xanthophylls | |
| 53310. |
What are carotenoids? |
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Answer» Caratenoid provide colour to fruits ,vegetables,fowers etc.It is a pigment present in plants Carotenoid are the plant pigment which is responsible to provides color for various fruit , vegetables. |
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| 53311. |
What is the property\'s of H,He, lithium boron carbon..........? |
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Answer» They are strong volatile acid alkaline They are strong volatile acid alka |
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| 53312. |
How do carbohydrate proteins fats get digested in human being |
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Answer» Carbohydrates first change into suger by the action of saliva which secreted (Amylase)..and complete digestion of carbohydrates occurs in small intestine by pancreatic amylase secreted by pancres and change into glucose. Bile salt emulified fat which is secreted by liver on which the lipase work and convert it into fatty acid or glycerol trypsan which help in digestion of protein into amino acid. This all process occurs in small intestine expect saliva action on carbohydrates Fat is firstly emulsified in the small intestine by the action of bile juice and after that pancreatic enzyme "lipase" acts over it and it is completely digested in "illeum" Protein is digested by pepsin and then by tripsin in small intestine which is secreted by pancreas and the digestion of carbohydrates begins in mouth by salivary amylase and then the complete digestion of carbohydrates occur in small intestine by pancreatic amylase secreted by pancreas Due to secretion of liver and pancreatic juices Due to the secretion of pepsin |
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| 53313. |
How heat is released out during digestion |
| Answer» during digestion the chemical energy found in our food can be converted to many different forms it can be converted to the thermal energy because of a body produce heat when digesting our food the chemical energy in our food can also be converted to mechanical energy in the form of muscles movement | |
| 53314. |
Difference between blood and lymph 5 points |
| Answer» The most obvious difference is of course a lack of a pump in a lymphatic system. The blood throughout our body is pumped by the heart-the most powerful muscle in the human body. However, the lymphatic system does not have any such system. It flows through the veins in a passive manner. The liquids are pushed along the system by the normal movements of the body.Another very important difference between the two relate to their functions. Blood flows through our veins and carries oxygen to all parts of the body. The lymphatic system in fact removes the waste and other products that are released in the tissues.The blood in our body flows in a continuous cycle. It is in the form of a cycle. The oxygen deprived blood is carried to the heart and replenished with oxygen. After this, the same blood is channeled throughout the body. However, the lymph flows in a different manner. It flows from the tissue into the lymphatic system. However, once it gets into the vessels, the lymph can only flow in one direction.The constituents of blood are different from those of lymph. Blood consists of liquid plasma, white blood cells, red blood cells and platelets. The filtered lymph that is channeled into the cardiovascular system is more like a milky white or clear liquid.Any injury on the surface of the body causes the spurting of blood. So it is something that you can see. However, it is very difficult to observe damage to the lymphatic system unless you are confronted by swollen lymph nodes.The blood is purified in the kidney. In the kidneys, the waste products are absorbed and excess liquids are removed. Once this is done, the essential liquids are returned to the cardiovascular system. However, the lymph system is self sufficient. The lymph nodes located throughout the body remove the waste and kill some of the pathogens | |
| 53315. |
Difference between potential and potential difference |
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Answer» Potential :-The work is to be done to move a unit positive charge from infinity to that point of the observation is called electric potential.Potential difference:-The work is done to move a unit positive charge from a point A to the other point B is called potential difference Potential difference:- The difference in electric potential between two points is known as potential difference. V is equal to W/q The potential difference is measured by voltmeter.Potential:- The electric potential or potential at a point in an electric field is define as the work done in moving a unit positive charge from infinity to that point. |
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| 53316. |
Two coils of 3 ohm and 6 ohm are connected in series across a battery of 12v . Find the electrical |
| Answer» I =v /r3+6=9R=9I=12/9=1.42 | |
| 53317. |
Which acid is present in grapes |
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Answer» Tartaric acid Tartaric acid Tartaric acid Tartaric acid |
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| 53318. |
If concave mirror produces real image then why are the images formed behind the mirror? |
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Answer» If this is so then why we see our face in the mirror it should not be there. Nope they are formed infront of mirror |
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| 53319. |
wath is the difference between resistance and resistivity |
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Answer» Resistance is th property of metal and it depends on four factour lenght of wire, area of cross section , nature of material and temperature and resistivity is the property of material and it depends on two factor nature of material and temperature. I hope it will help you. Thanks?? Resistance is the property to resist flow of current.and resistivity is the specific resistance of 1meter length and 1 meter square at temperature |
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| 53320. |
give examples of nutrients |
| Answer» Carbohydrates fats protiens vitamin minerals and fibred | |
| 53321. |
How does energy flow in an ecosystem? |
| Answer» 1% of energy is absorbed by the producers from the sun and they produce food then 10%of energy get transferred to next trophic level from which they are able to perform their tasks and after that 10%of energy is transferred to next trophic level......totally means .....1%producers get from sunlight----10% is transferred to primary consumers from producers ,10%is transferred to secondary consumers from primary and 10% is transferred to tertiary from secondary consumers. | |
| 53322. |
Give equation when aluminium metal reacts with sodium hydroxide |
| Answer» Al +NaOH----> Al(OH)2+Na | |
| 53323. |
Which pancreatic enzyme is effective in digesting proteins |
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Answer» Tripsin Trypsinogen, which is an inactive(zymogenic) protease that, once activated in the duodenum into trypsin, breaks down proteins at the basic amino acids. Trypsin |
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| 53324. |
Can we change shape and size in any age. |
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Answer» Yes it is possible Ya by phycical exercises.Like six pack abs.But if you want pseudopodia then that changes in body are not possible No Yes |
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| 53325. |
differentiate between ovum and sperm |
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Answer» Ovum is present in female and sperm is present in male Ovum is egg which present in female. Sperm is present in male. |
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| 53326. |
What is a neutralisation reaction?give two examples |
| Answer» The reaction of acid and base to form salt and water is called neutralisation reaction.Example:NaOH+HCl-NaCl+H^2O2NaOH+H^2SO4-NaSO4+H^2O | |
| 53327. |
How we can calculate the pH value of 10^-3M of HCL solution |
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| 53328. |
Sciencert practices for class 10 |
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| 53329. |
What is the work of hcl in our stomach |
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Answer» It creates the medium acidic and fight against pathogens It provide acidic nature and kills germs. HCl acid in the stomach activates the enzyme pepsin which needs acidic medium and of course kills germs. Hcl is very acidic and the mucus protects it the Hcl will make the way for the enzymepepsim that is digestion of proteins It is present in stomach which works as a acidic medium and kills germs It kills the germs. |
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| 53330. |
What is the commercial unit of energy |
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Answer» It\'s kw-h not kw/h Kw/h KW /h Kilowatt hour or kW/h |
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| 53331. |
What is nutralization |
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Answer» When acid reacts with base to form salt and water. The reactin in acid and base react to form salt and water. The reaction between an acid and a base forming salt and water mixing of acid with base to produce salt and water |
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| 53332. |
Can we write 03andcl4. And why we writeo2,cl2.sir plz Clare my doubt. |
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| 53333. |
What is wavelength of photosynthesis |
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Answer» Here are some of pigments which absorb some of the colour of light with different wavelengths...........................Chlorophyll a: This is the most abundant pigment in plants. Chlorophyll a absorbs light with wavelengths of 430nm(blue) and 662nm(red). It reflects green light strongly so it appears green to us. It contains a hydrophobic (fat soluble) phytol chain that allow it to be embedded in a lipid membrane .........Chlorophyll b: This molecule has a structure similar to that of chlorophyll a. It absorbs light of 453nm and 642 nm maximally. It is not as abundant as chlorophyll a, and probably evolved later..... . ...........Carotenoids absorb light maximally between 460 nm and 550 nm and appear red, orange, or yellow to us. I don\'t know Photosynthesis doesnt have any wavelength but the colour of lights in it contain different wavelengths. |
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| 53334. |
What is parallel and series connection ?? |
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Answer» In parallal combination same current do not flow through wach resistors.In series combination same current flows through each resistors. Parallel connection in which the same potential difference exists across these resistorsSeries connection in which same current flows through each resistor |
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| 53335. |
How is alveoli design to maximise the exchange of gases |
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Answer» Diffusion Diffusion |
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| 53336. |
State and derive joule\'s law of heating |
| Answer» Whenever a current is passing through a circuit it will generate heat in the environment.this phenomena is known as joules law of heating effect.H=p×t =vI ×t H =I ² rt | |
| 53337. |
Process of urine formation |
| Answer» First we take food it than moves into mouth where saliva is mixed into it than through oesophagus or foodpipe it moves to stomach where HCL ,Pepsin , and mucus released by gastric gland or stomach . Pepsin acts on proteins for its breakdown HCL acts as asidic medium for pepsin and mucus saves stomach inner layer by HCL or acids HCL also kills bacterias that enters in our body through food after stomach it moves to small intestine where bile juice secreted by liver is also added that left nutrients are absorbed here after tat it moves to large intestine where also nutrient r absorbed than nutients moves through blood to all body cells and waste is moved to kidneys for filtration . In kidney there is a pigment present which helps in filtration that is lumen than through ureters it moves to urinary bladder where urine is stored than at last it excreate out through urethra .☺for more learning u may see excreatary system in human being and also digestive system and diagram of nephron .Hope u understand how urine is produced by my answer if yes so plz reply | |
| 53338. |
How is sodium carbonate prepared give two uses of the compound |
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| 53339. |
Mention the nature of toothpaste how do they prevent tooth decay |
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Answer» Toothpaste is basic in nature.it maintains the ph approx 5.5 and prevent tooth decay Basic |
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| 53340. |
Explain how antacids give relief from acidity |
| Answer» Acidity is caused due to excess amount of acid in stomach and antacids include mainly bases which creates basic environment | |
| 53341. |
Mention pH range with in which our Body Works |
| Answer» 4.5 and8 | |
| 53342. |
What di you mean by light and dark reaction |
| Answer» Reactions taking place in presence of sunlight are called light reactions like photosynthesisReactionstaking place in absence of sunlight are called dark reaction eg reduction of carbon dioxide into carbohydrates is called dark reactions. | |
| 53343. |
What are the two functions of stomata |
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Answer» 1)Exchange of gases 2)lose of water Stomatal openings conducts proccess of photosynthesis, exchange of various gases takes place through it, excess water is loss by osmosis 1. It helps in exchange of gases. 2. It help in transpiration. Chrophyll and photosynthesis Through which plants absorbed sunlight |
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| 53344. |
I have a problem in Potential diffrence,ohm\' |
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Answer» The work done to carry a unit positive charge from infinity to a point is known as potential difference. Ohm is the SI unit of resistance.1 ohm resistance means 1 ampere of current flows through a circuit when 1 V of potential difference is maintained Ohm is the SI unit of resistence.1 ohm is equal to 1V/1C. Apne teacher se contact kar na The amount of work done in moving a unit charge from one point to another inside a electric field is called potential difference. What ohm??? |
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| 53345. |
What are the linear or ohmic conductors? |
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| 53346. |
Lateral inversion is seen in which mirror |
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Answer» Yaar plane,convex and concave mirror (virtual) all make inverted image Lateral inversion is usually seen in a plane mirror. |
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| 53347. |
Why did trees bend permanently |
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| 53348. |
Define 1amphere |
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Answer» If 1 coloumb of electric charge is passing through any cross-section of conductor in 1 sec then the electric charge passing through the conductor is said to be equal to 1 ampere. 1 ampere of current means when 1 coloumb of charge flows through a circuit in 1 second 1ampere of current is equal to 1 coloumb of charge passing through in 1 second Ok You can see this in your NCERT |
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| 53349. |
Sir my question is. how we can stable an element. |
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Answer» An element will be stable only when it will have 2 or 8 electrons in its outer most shell or energy level You can\'t make a element stable but ususally it depends upon electronic configuration.If the ec has to be octect or duplet configuration then it is stable.EG:Helium,Argon and etc. |
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| 53350. |
Define 1 volt (11:56 am 25 May |
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Answer» If 1 joule of work is done in bringing 1 coloumb of charge from infinity to a point in electric field then the electric potential at that point is said to be equal to 1 volt When 1 joule of work is done in bringing 1 coulamb of charge from infinity to that point is called 1 volt. 1 volt is defined as 1 joule of work done in moving 1 coulomb of electric charge.1volt= 1joule/ 1 coulomb, or1v= 1j/ 1c |
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