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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.
| 43351. |
Describe the refraction of light when it passes to glass slab |
| Answer» Light apne real path se band ho jaigi because glass is denser than air | |
| 43352. |
State the relationship between 1Ampere and1 volt |
| Answer» 1volt pottential difference is created when there is a 1 joule of work moving the charge of 1 coulomb and the 1 ampere is current when charge move 1 coulomb in 1 sec I=Q/T | |
| 43353. |
explain the mechanism of urine formation |
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| 43354. |
Describe the work of kidney |
| Answer» Kidney filter the blood | |
| 43355. |
Function of human eye |
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Answer» Its function is to differentiate between different colours, differ. between light and dark, tell us the postion, shape , size of object, etc Hdudhrjdhf |
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| 43356. |
How is chemical reactions formed |
| Answer» By re- arengment of atoms chemical reaction take place | |
| 43357. |
How many muscular force equal to 1 newton? |
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| 43358. |
Which part of our eye we donet after deth |
| Answer» Lence | |
| 43359. |
What happens to resistance of conductor when radius of conductor becomes half |
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Answer» It will become 4 times Resistance increases |
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| 43360. |
Name the two parts of plants through which gaseous waste products are released into air |
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| 43361. |
What do you mean by conventional current |
| Answer» An electric current that flows from positive to negative is called a conventional current.An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It is conventional to think that current flows from a higher potential to a lower potential. As the electrons are negatively charged the flow of electrons occurs from a lower potential to a higher potential. So the conventional current flows in a direction opposite to the direction of flow of electrons.The conventional direction of current is taken to be the direction of flow of positive charge, i.e. the conventional current flows from the positive to the negative of an electric cell. | |
| 43362. |
What is the function nephron. |
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| 43363. |
Draw labelled diagram of an embryo of pea |
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| 43364. |
Explain light and dark reaction . |
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| 43365. |
What is dark reaction??? |
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| 43366. |
What substance are contained in gastric huice |
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Answer» Pepsin(peposinogen) Hcl,mucus,pepsin |
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| 43367. |
Flow chart on the chapter chemical equations and reactions |
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| 43368. |
Function of hcl in stomach |
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Answer» Hydrochloric acid is the only acid secreted by parietal cells of the stomach.*This provides an acidic environment for many digestive enzymes to become active. Enzymes like pepsinogen get activated by HCl into pepsin which acts on proteins and brings about their digestion.\xa0*HCl along with gastric lipase emulsifies the lipids present in our food.*HCl kills most of the pathogenic bacteria entering the digestive tract along with our food and water. It gives acidic medium in stomach and kill all the germs while it decreases the pH at 1-2 potenz |
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| 43369. |
Function of hck |
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| 43370. |
What is the pumping organ to pump nutrition in plants |
| Answer» Xylem and phloem | |
| 43371. |
Page no 35 group activity |
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| 43372. |
Write a difference between the series and a parallel combination of resistance |
| Answer» Resistance is highest in series combination while it is lowest in parallel combination | |
| 43373. |
Difference between electrical resistance and resistivity of a conductor |
| Answer» Resistance is defined as the property of the conductor which opposes the flow of electric current. Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. The SI unit of resistivity is Ohm. | |
| 43374. |
Proper definition of double displacement reaction |
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Answer» Double displacement reactions may be defined as the chemical reactions in which one component each of both the reacting molecules is exchanged to form the products. During this reaction, the cations and anions of two different compounds switch places, forming two entirely different compounds. A chemical reactions in which their is an exchange of ions between the reactant are called double displacement reaction |
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| 43375. |
What are two types of reflexive index ? |
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Answer» There are two types of indexes of refraction:Absolute index : The absolute index of refraction is the ratio for light passing from a vacuum into a substance. When we refer to the index of refraction of a substance, we mean its absolute index, since the absolute index of refraction of air is so close to n = 1.For example: nwater\xa0= 1.33 and nglass\xa0= 1.50In practice, it is determined by the slope of a graph of sine r = f (sine i), where air is the refracting medium. In the case where air is the incident medium, the absolute index of the unknown substance equals the reciprocal of the slope (1/slope).Relative index: The relative index of refraction corresponds to the ratio of the optical densities of the two substances. Mathematically, it is expressed as a ratio of absolute indexes.It is determined by the slope of a graph of sin r = f (sin i).Consequently, when a relative refraction index is given, the incident and refractive media will always be mentioned. Absolute n relative..... |
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| 43376. |
Why a chemical balanced |
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Answer» To obey the law of conservation of mass Chemical balanced beacuse of law of conservation of mass .law of conservation of mass state mass can niether be created nor be destroyed. To follow law if conservation of mass |
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| 43377. |
Why are ionic compounds usually hard??? |
| Answer» Ionic compounds are usually hard as the ions present in the ionic compounds are held together by the strong electrostatic forces of attraction. | |
| 43378. |
How do the earthworm move?? |
| Answer» Earthworms are small worms which can move easily on hard and slippery surfaces. Earthworms move with help of tiny, stiff hair-like projections called bristles. Earthworms move forward by repeated contractions and relaxations of their muscles in the skin. A slimy substance secreted by the earthworm helps in its movement.\xa0 | |
| 43379. |
What do u mean by lymph? |
| Answer» Colorless fluid connective tissue which consists of only WBC... | |
| 43380. |
Transpiration is a necessary evil? Reason |
| Answer» Because through it only, water gets excreted in plants | |
| 43381. |
Kya cell ka difinition...cell is the structural,fuctional and hereditary unit of life shi hai |
| Answer» ???? | |
| 43382. |
Describe the components of blood |
| Answer» Blood has four main components that are----Plasma, red blood cells, white blood cell, and platelets. | |
| 43383. |
Eqation for black and white photographs |
| Answer» SilverbromideAgBr | |
| 43384. |
How can we know,which elements or compound are formed by decomposition of a given compound |
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| 43385. |
Why should we add acid into water |
| Answer» If you add water to acid it forms an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container and all this because the reaction is exothermic. ... So it is always safer to add acid to water, and not water to acid | |
| 43386. |
What is ornoregulation |
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| 43387. |
What hAppens to end products of photosynthesis..? |
| Answer» During the process of photosynthesis, Carbon dioxide and Water combine in the presence of Sunlight and Chlorophyll to produce Carbohydrates (glucose) and Oxygen. Thus, the end products of photosynthesis are Carbohydrates(glucose) and Oxygen. | |
| 43388. |
4 phases of the light reaction |
| Answer» * Light reaction occurs in the grana of the chloroplasts. Using light energy, water molecules split out to release oxygen.* The chlorophyll pigments trap light energy and excite an electron. This excited electron converts light energy into chemical energy. This chemical energy is stored as ATP (Adenosine Tri Phosphate) and NADPH (Nicotinamide Adenine Dinucleotide Phosphate).2H2O + 2NADP+ + 3ADP + 3Pi --------> O2 + 2NADPH + 3ATPLight reaction occurs in thylakoid membranes of chloroplasts in a leaf.\xa0Light energy is absorbed by photosystems PS-I and PS-II. Cyclic and non-cyclic photophosphorylation occur in the cells. End products are ATP and NADP.H2. Oxygen is released as a by-product of the photolysis if water. Non-cyclic photophosphorylation takes place in the grans of chloroplasts.Non-cyclic photophosphorylation occurs as a result of an interaction between photosystem I and photosystem II. Non-cyclic photophosphorylation helps in the formation of ATP as a result of electron flow from water to NADP. As this is an unidirectional flow, and does not follow any cyclic procedure, is called as non-cyclic photophosphorylation.* Photosystem II gets excited during absorption of light and transfers electrons to electron acceptor molecule. P680 becomes oxidising agent which splits one molecule of water to release oxygen. This light dependent splitting of water molecule is called as photolysis.\xa0* As the water molecule is broken, electrons are generated which are accpeted by P680 molecule to restore its electrons. Now primary electron acceptor is reduced after accepting electrons from P680.* This reduced acceptor donates electrons to the other components of ETS.releasing energy in the form of ATP from ADP.* Photosystem I is excited by absorbing light and gets oxidised. It transfers its electrons to primary electron acceptor which gets reduced. Oxidised P700 obtains electrons from photosystem II, reduced electron acceptor of photosystem I transfer electrons to ferredoxin and ferredoxin-NADP reductase to reduce NADP to NADPH2There is a continuous flow of electrons from water to photosystem II to photosystem I and then to NADP. As these electrons are transferred, there is the formation of ATP from ADP. | |
| 43389. |
Describe assimilation |
| Answer» The food absorbed by blood is transported to various parts of the body by blood vessels. This process is known as assimilation. | |
| 43390. |
Why do veins have thin wall as compared to arteries???????? |
| Answer» Arteries carry blood from the heart . The blood is pumped with a pressure. So, to withstand the blood pressure, they have a thick wall. Veins carry the blood from all the parts of the body to the heart, they have a lower blood pressure.So, in totality, veins have thin walls while arteries have thick walls. | |
| 43391. |
Precipatiob |
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Answer» This is wrong In reaction a insolible substance are formed are called precipitate |
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| 43392. |
What is a precipation |
| Answer» The chemical reaction in which a white coloured substance which is insoluble in water (precipitate) is formed then it is known as precipitation reactionNa2SO4 (aq) + BaCl2 (aq) → BaSO4 (s) + 2NaCl(aq)In this reaction Barium sulphate is a white colour precipitate and it is insoluble in water. | |
| 43393. |
Write 10 chemical equation and balance them |
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| 43394. |
Sab so gae kya...?? |
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Answer» Nahi yar PUBG khel rahe hai...... Ji |
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| 43395. |
Write four uses of concave mirror |
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Answer» Thanks ❣️❣️❣️ 1) They are used as reflectors in projectors , headlights , torches etc.2) They are used as shaving mirrors.3) For heating food in solar cookers.4) In floodlights. |
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| 43396. |
Which is the organelle of plant cell where photosynthesis occur? |
| Answer» Stomata | |
| 43397. |
How hydrogen and oxygen react with each otherb |
| Answer» 2H2 + O2 — 2H2OIt is the balanced chemical eqn. of H and O rxn. | |
| 43398. |
AcchA to hm chlte h ...????? |
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Answer» Bye bestie...main bhi ja rhi.. Byy bestie Byee.. ???? |
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| 43399. |
Write down the physical or general properties of acids or bases |
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Answer» Bases are bitter in taste Acid are generally sour in taste General Properties of Acids\tAcids are corrosive in nature.\tThey are good conductors of electricity.\tTheir pH values are always less than 7.\tWhen reacted with metals, these substances produce hydrogen gas.\tAcids are sour-tasting substances.\tExamples: Sulfuric acid (H2SO4), Hydrochloric acid (HCl), Acetic acid (CH3COOH).General Properties of Bases\tThey are found to have a soapy texture when touched.\tThese substances release hydroxide ions (OH– ions) when dissolved in water.\tIn their aqueous solutions, bases act as good conductors of electricity.\tThe pH values corresponding to bases are always greater than 7.\tBases are bitter-tasting substances which have the ability to turn red litmus paper blue.\tExamples: Sodium hydroxide (NaOH), milk of magnesia (Mg(OH)2), calcium hydroxide (Ca(OH)2). |
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| 43400. |
When do we say that potential difference between two points of a circuit is 1 volt? |
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Answer» The potential difference between two point is 1 volt say when the 1joule of work done in moving 1coulomb charge from one point to another point. When 1joule of work done to moving one coulumb charge |
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