Saved Bookmarks
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.
| 43901. |
What is the uses of resistivity |
|
Answer» It is used in heater, oven etc \tThe resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area. The unit for resistivity is the ohm-metre.\tThe resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size.\tA good conductor has less resistivity, whereas a bad conductor or insulator has high resistivity.\tThe resistivity of semi-conductors lies between that of conductors and insulators. The resistivity of a metallic conductor increases with an increase in its temperature, whereas the resistivity of a semi-conductor decreases with an increase in its temperature. |
|
| 43902. |
What is the S.I unit of electricity |
|
Answer» Coloumb Ampere(A) Volt |
|
| 43903. |
The SI unit of electric current is |
|
Answer» Coloumb Ampere Yes .... sorry for spelling mistake.... Ampere Is ampere Amphere.... |
|
| 43904. |
Define liver, pancreas |
| Answer» The pancreas is an abdominal organ that is located behind the stomach and is surrounded by other organs, including the spleen, liver and small intestine. The pancreas is about 6 inches (15.24 centimeters) long, oblong and flat. The pancreas plays an important role in digestion and in regulating blood sugar. Three diseases associated with the pancreas are pancreatitis, pancreatic cancer and diabetes. | |
| 43905. |
What is autotrophi |
| Answer» Autotrophs are organisms which can synthesise their own food by the process of photosynthesis. Plants and some bacteria that can synthesise their own food and are called as autotrophs.\xa0 | |
| 43906. |
Linear motion |
| Answer» Linear motion is the motion that is natural to an object: moving in a straight line. According to Newton s First Law of Motion, an object not affected by any force will continue indefinitely in a straight line. | |
| 43907. |
What are the steps included in photosynthesis? |
|
Answer» Very nice answer Photosynthesis comprises two phases.Light-dependent reaction (or) Light reaction: Photosynthesis begins with the light reaction which is carried out only during the day in the presence of sunlight. In plants, the light-dependent reaction takes place in the thylakoid membranes of chloroplasts. The Grana, membrane-bound sacs like structures present inside the thylakoids functions by gathering light and is called as photosystems. These photosystems have large complexes of pigment and proteins molecules present within the plant cells which plays the primary role during the process of light reactions. There are two types of photosystems: photosystem I and photosystem II.Under the light-dependent reactions, the light energy is converted to ATP and NADPH which are used in the second phase of photosynthesis. During the light reactions, ATP and NADPH are generated by two electron transport chains, water is used and oxygen is produced.The chemical equation in the light reaction can be reduced to:\t2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATP\tLight-independent reaction (or) Dark reaction.Dark reaction is also called carbon-fixing reaction. It is a light-independent process in which sugar molecules are formed from the water and carbon dioxide molecules. The dark reaction occurs in the stroma of the chloroplast where they utilize the NADPH and ATP products of the light reaction. Plants capture the carbon dioxide from the atmosphere through stomata and proceed to the Calvin cycle. In the Calvin cycle, the ATP and NADPH formed during light reaction drive the reaction and convert 6 molecules of carbon dioxide into one sugar molecule or glucose.The chemical equation for the dark reaction can be reduced to:\t3CO2 + 6 NADPH + 5H2O + 9ATP → G3P + 2H+ + 6 NADP+ + 9 ADP + 8 Pi\t 4 steps... absorption of light energy by chlorophyll, conversion of light energy into chemical energy, splitting of water molecules into hydrogen and oxygen, reduction of carbon dioxide to carbohydrates... |
|
| 43908. |
Anybody know is cbse is following same science text book or changed? |
|
Answer» Same Its same....but some rumours were there that text book is changed...but 99%its same Same Same text book .... |
|
| 43909. |
What is the relation between potential difference,work done and charge moved |
|
Answer» V=W/ Q The relation between potential difference, work done and charge moved is given byPotential difference = work done / charge moved⇒V = W/q\xa0 V = W/ Q |
|
| 43910. |
Basic function of reproduction |
| Answer» To continue the gene of its own and Continue it\'s life process | |
| 43911. |
How can i balance pb(no3)2 = pbo + no2+ o2 |
| Answer» Balanced equation:2\xa0PB(NO3)2\xa0=\xa02\xa0PBO +\xa04\xa0NO2\xa0+ O2Reaction type: decomposition | |
| 43912. |
How can you prepare nitrogen dioxide gas? Give the chemical equation |
| Answer» | |
| 43913. |
With the help of label diagram explain five step process of holozoic nutrition in amoeba? |
| Answer» | |
| 43914. |
What is living factors of life? |
| Answer» Living things are alive. They possess life. They have cells, grow and show locomotion or movement. They undergo metabolism with anabolic and catabolic reactions. They reproduce. Living things have particular life span. They respire as they require food for energy and also excrete waste from the body. They fall into a cycle of – born, grow, reproduce and die. Examples of living things are: Animals, birds, insects, human beings | |
| 43915. |
How is the formula of ferrous oxide is formed |
| Answer» Fe3O4 is formed with the combination of FeO and Fe2O3 i.e. ferrous oxide and ferric oxide.FeO + Fe2O3→ Fe3O4 | |
| 43916. |
How many subjects do you have |
| Answer» Means? | |
| 43917. |
What are the important questions come in entrance examinations of class 11? Please help!! ?? |
| Answer» You should ask 11th or 12th\'s students...They can help you better... | |
| 43918. |
how does the fungi will enter into grapes that are separated from plants |
| Answer» | |
| 43919. |
What are the 3 stages of photosynthesis |
| Answer» * Absorption of light energy by chlorophyll. * Conversion of light energy into chemical energySplitting of water molecules into hydrogen and oxygen .*Reductionof carbondioxide into carbohydrates. | |
| 43920. |
Periods and tables |
| Answer» 7 periods 18 groups | |
| 43921. |
Any 10 chemical compounds with there formulae |
| Answer» | |
| 43922. |
What are digestive enzymes? |
|
Answer» A groups of enzymes helps in breaking down of complex molecules into simpler from in orde to facilitate nutrients for absorption by the entire body.....Some enzymes are- proteoses, lipase ,Amylase...etc. Special enzymes which help in digestion of food by breaking its particle into very small molecules is called digestive enzymes |
|
| 43923. |
How does the creation of variation in a species promote survival |
| Answer» Creation of variation fulfill all present day need of a species...it helps them to survive in present day and upcoming environment... | |
| 43924. |
What is the role of haemoglobin in blood? |
|
Answer» 1) It provides red colour to the blood..2)It mainly carries oxygen to the tissue..3)It buffers blood pH.. and maintain it upto specific level...? To transport oxygenated and deoxygenated blood in body |
|
| 43925. |
What is the average lifespan of Red Blood cells? |
|
Answer» Red blood cells have an average life span of 120 days. Old or damaged red blood cells are broken down in the liver and spleen, and new ones are produced in the bone marrow. Approx 100 days |
|
| 43926. |
Explain how the blood system carries waste product from liver to the kidney ? |
| Answer» They eliminate water, urea, and other waste products from the body in the form of urine. The kidneys get their blood supply through the renal arteries. The renal artery is a branch of the abdominal aorta that supplies the kidneys with blood from the liver and heart. There are 2 - the left and the right renal artery.\xa0 | |
| 43927. |
What are the major constituents of urine ? |
| Answer» Human urine consists primarily of water (91% to 96%), with organic solutes including urea, creatinine, uric acid, and trace amounts of enzymes, carbohydrates, hormones, fatty acids, pigments, and mucins, and inorganic ions such as sodium (Na+), potassium (K+), chloride (Cl-), magnesium (Mg2+), calcium (Ca2+), ammonium . | |
| 43928. |
What is the unit of kidney |
|
Answer» The nephron is the microscopic structural and functional unit of the kidney. It is composed of a renal corpuscle and a renal tubule. The renal corpuscle consists of a tuft of capillaries called a glomerulus and an encompassing Bowman\'s capsule. Nephron Nephron Nephron Nephron |
|
| 43929. |
Most impartant diagrams in exam |
| Answer» | |
| 43930. |
Why combustion is considered as chemical change |
| Answer» Combustion always involve molecular oxygen O2. | |
| 43931. |
Explain male reproductive system and explain sexual reproduction b/w male and female? |
| Answer» | |
| 43932. |
What is meant by inert electrode |
| Answer» | |
| 43933. |
What are nuclear reactors |
| Answer» A nuclear reacter is a device used to control nuclear chain reaction ..It is used in nuclear power plant to generate electricity... | |
| 43934. |
What are the uses of alloys |
| Answer» Alloy means, these are generally use to make medal, coin, Jewelery, etc.alloys are bronze , brass, coin metal... | |
| 43935. |
explain electricity in detail? |
| Answer» Flow of current means flow of fre electrone in conducter wheich carry charge is known as electeiciy | |
| 43936. |
method to prevent rancidity |
| Answer» Method of preventing rancidity is adding antioxidants in substance which prevent ransidation of a substance. keeping food in airtight containers slow down oxidation | |
| 43937. |
Why it is advised that camera photo films should not be exposed to light? |
| Answer» | |
| 43938. |
What is osmoregulation??? |
|
Answer» Regulation of miniral and ions Osmoregulation is the regulation of osmotic pressure of organism body fluids,which maintains the fluids balance and concentration of salts.... |
|
| 43939. |
Describe four adaptation and desert animal |
| Answer» | |
| 43940. |
Difference between pollination and fertilization |
| Answer» \tPollinationFertilizationPollination is an external process.Fertilization is an internal process.Pollination takes place before fertilization.Fertilization takes place after pollination.The transfer of pollen grains from the male to the female part of a flower.The fusion of male and female gamete.It is a physical process.It is a genetic and biochemical process.Are achieved by agents like wind, birds, insects, and animals.Are achieved by the growth of pollen tube.External factors are required.External factors are not required.This process leads to fertilization.This process leads to the formation of seeds.There is no formation of Pollen tube.Pollen tubes are formed for transferring male gametes into an egg cell.\t | |
| 43941. |
Why is magnesium ribbon is cleaned before burning?? |
|
Answer» To remove it\'s protective layer of basic oxide If we want to burn a magnesium ribbon in an experiment, it has to be first cleaned with fine sandpaper or steel wool to remove all the oxide coating which may have been deposited on the ribbon by the reaction of magnesium with atmospheric oxygen. The ribbon if remains coated with oxide, it will not facilitate burning easily and desired results will not be obtained from the experiment. Before burning,Magnesium ribbon is cleaned because to remove the basic oxide layer |
|
| 43942. |
How saliva is help to digest food? |
|
Answer» 3.It also help in breaking food particle which are trapped in teeth cavities..4.salivary lipase also help new born baby in fat digestion..5. It maintains ph of mouth... Idhr schand ki language tuff hai Di 3 or bta dijiye... 1. It makes food moistened for swallowing easily...2. It makes complex food or starch in simplar form... |
|
| 43943. |
How to write magnesium oxide |
|
Answer» MgO MgO |
|
| 43944. |
What is oxidation. |
| Answer» When O2 is + and H2 is - | |
| 43945. |
What do you meant by magnification +1?Where does it occur? |
| Answer» | |
| 43946. |
Suggest any reference book of chemistry for class 10 |
|
Answer» All in one arihant publication or s chand Xam idea...and all in one Foundation course of chemistry ( MTG publication) Please tell faster |
|
| 43947. |
Name the respiratory pigment in human being where is this pigment found |
| Answer» \tHemoglobin or Haemoglobin is the respiratory pigment in human beings.\tIt carries dissolved oxygen and thus is very important for human survival.\tIt is red in color and present in the human blood.\tRequired levels of hemoglobin should always be maintained in the human body for a safe and healthy life.\xa0 | |
| 43948. |
Write any one activity of chemical reaction? |
| Answer» | |
| 43949. |
What are the signs are using in chemical equation? |
| Answer» Signs of Chemical Reaction\tChange of state of substance\tChange of colour of substance\tEvolution of heat\tAbsorption of heat\tEvolution of gas\tEvolution of light\tEvolution of sound, etc. | |
| 43950. |
Define single displacement reaction? |
|
Answer» A single displacement reaction which is also called as single replacement reaction is a kind of oxidation-reduction chemical reaction when an ion or element moves out of a compound, i.e., one element is replaced by the other in a compound.\tWhen chlorine is added as a gas or gas dissolved in water to the solution of sodium bromide, the chlorine acquires the place of bromine. Since chlorine is more reactive than bromine, it displaces bromine from sodium bromide, and the solutions turn blue. The brown color is the bromine that is displaced.If you notice the equation, you can see that the Cl and Br have swapped their original places.\tchlorine + sodium bromide → sodium chloride + bromine\tCl2(aq) + 2NaBr(aq) → 2NaCl(aq) + Br2(aq)\t Welcome ayush... Tq di K + H2O -- KOH + H2 A reaction in which one element replaces other element in a compound is called displacement or single displacement reactions....... |
|