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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.
| 45351. |
List two disadvantages of rain water harvesting |
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| 45352. |
Formula for find ph value |
| Answer» pH FormulapH\xa0is a measure of the amount of activity of hydrogen ions (H+) in a solution and thus its alkalinity or acidity. Although a pH value is unitless, it is not a random scale; the number rises from a description grounded on the activity of hydrogen ions in the solution.\xa0pH is described as\xa0“the negative of the logarithm of the molar hydronium-ion concentration.”pH Formula\xa0is arithmetically articulated as\xa0\xa0The\xa0pH Formula\xa0can also be noted as\xa0\xa0pH ProblemsSolved numerical based on pH are provided under.Problem 1:\xa0Calculate the pH of human arterial blood in which the hydronium ion concentration is 4.0 ×× 10-8M.Answer:The concentration of hydronium ion is 4.0 × 10-8MThus, we can make use of the formula,pH = – log[4.0 × 10-8]pH = 7.40As the hydronium ion concentration is provided till two decimal places we can note the pH with two significant figures. | |
| 45353. |
Why in crysralline solids show different refractive index |
| Answer» All crystalline solids are not anisotropic. Those crystalline solids which are anisotropic have their atoms arranged and spaced in a different manner in three different planes (X, Y and Z). Therefore, the physical properties of crystalline solids such as electrical resistance or refractive index show different values when measured along different directions in the same crystals.Example NaCl, Quartz, Ice, HCl, Iron, etc. | |
| 45354. |
Why is is necessary for a conductor to have free electrons ? |
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Answer» It is necessary for a conductor to have free electron for the conduction of electricity. If no free electrons r there then no current will pass through the conductor It is bcoz electron can able to move and current flows through this conductor Jaat paii tussi shyam kumar ban gye?????? |
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| 45355. |
Maxwell\'s right hand thumb rule |
| Answer» Driving corkscrew in the direction of current then the direction in which we turn its handle is the direction of magnetic field | |
| 45356. |
structure of ethyl |
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Answer» C2H5 Sayad hamari kal fb pe baat hui thee at approx 3or 4 pm |
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| 45357. |
What ia esterification |
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Answer» Formation of ester from alcohol is called esterification When ethanol reacts with ethanoic acid ester produces |
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| 45358. |
Twinkling of star\'s |
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Answer» Due to atmospheric refraction I am star ? It is due to atmospheric refraction |
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| 45359. |
What is archeopetyrx |
| Answer» It is a connecting link between birds and reptiles. It shows that birds are evolved from reptiles......... | |
| 45360. |
explain the reaction of C2H5OH to CH3COOH after adding KMNO3 to C2H5OH |
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Answer» CH3CH2OH. —KMnO4. —. CH3COOH It is oxidation reaction |
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| 45361. |
What is milk of magnesia? How it is formed? |
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Answer» Milk of Magnesia is a brand name for magnesium hydroxide, a medication used to treat constipation. It\'s a type of laxative known as an oral osmotic.where the hydroxide ions from the Mg(OH)2 combine with acidic H+ ions produced in the form of hydrochloric acid by parietal cells in the stomach to produce water. Google it |
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| 45362. |
Why does not distilled water conduct electricity whereas rain water does ? |
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Answer» Because distilled water does not contain any ions but rainwater contain ions are responsible for conduct electricity Distilled water cannot conduct electricity because it does not contain ions while rain water conduct electricity as it contains ions due to the presence of dissolved salts in it. Because in rainwater ions are present which are responsible for the conduction of electricity but in distilled water ions are not present and hence it does not conduct electricity. |
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| 45363. |
What is least count and its formula |
| Answer» L.C. is the least value or reading that can be shown by the devices.It is value shown by the 1st division of the device.LC=Range/no. of divisions | |
| 45364. |
How offspring and parent of organisms reproducing sexually have the same number of chromosomes?? |
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Answer» A human has 46 chromosomes. If the no. of chromosomes exceeds that no. it will become another organism. Paakhi textbook kholo |
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| 45365. |
Female reproduction diagram |
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Answer» No. 137 pe hh It is ncert book on page no. 137... Figure 8.11 Abe textbook namak vastu hai vo kholne ka kabhi kashy kiya hai kya tune??? How here |
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| 45366. |
What are amphoterc reactions |
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Answer» Moderate Exam kaisa ata h easy/tough Thanks These are the reactions in which metal oxides reacts with acids as well as bases ex. Aluminium oxide and zinc oxide Amphoteric* |
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| 45367. |
What is Graafian follicle? |
| Answer» Fluid filled structure in mamallian ovary... | |
| 45368. |
define fossil and different ways to find age |
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Answer» thank you very much ......dii Fossils are the remains of dead and decaying plants and animals.The different ways to find age are-1-carbon dating method2-relative method |
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| 45369. |
What is the difference between pulse rate and breathing rate? |
| Answer» pulse rate is the number of times the heart pumps the blood into the thick walled artery in a minutebreathing rate is the number of times we inhale and exhale air including the respiratory pause in a minutepulse rate is related with heart while breathing rate is related to nosebreathing rate is normally 15-45 times under normal circumstancesLisle rate is normally 72 times | |
| 45370. |
Write the number of covalent bonds in the molecules of butane |
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Answer» Carbon -Carbon bonds = 3 Number of Carbon- Hydrogen bonds = 10 Total number of bonds in Butane = =Number of Carbon -Carbon bonds + Number of Carbon- Hydrogen bonds = 3 +10 =13....... copy pkdo structure banao..... fir check kro........ hope yu can understand ??? Are yr vhi to likha hai??? Write the number of covalent in the molecules of butane 13 |
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| 45371. |
Why is human eye considered to be special? |
| Answer» Because it gives us the sensation to see | |
| 45372. |
What is the difference between egestion and excretion? |
| Answer» \tSl.NoEgestionExcretion1.It occurs via **** and sometimes via mouth.It occurs via urethra, skin or mouth.2.It is a portion of the digestion process.It is a totally different life process.3.The material that is egested as faeces.The products that are eliminated by excretion are urine, sweat and carbon dioxide.\t | |
| 45373. |
Diagram of human alimentary canal showing duodenum |
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Answer» Plz check in ncert I am not able to draw diagram here.I think no one is able to draw diagram here |
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| 45374. |
Diagram of human alimentary canal |
| Answer» It is given in ncert book | |
| 45375. |
Ch-10 numericals |
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| 45376. |
Detergent formula tell me plz quick |
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Answer» Thanx to all Na2co3.10h20 The formula of Washing soda/ detergent is Na2CO3.10H2O Na2Co3.10H20....May be yhi h |
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| 45377. |
In image formation of mirror. Why the line passing through C return through same path ? |
| Answer» The Ray of light passing through the centre of curvature of concave mirror is reflected along same path because it strikes the concave mirror at right angles due to which the angle of incidence is equal to angle of reflection are both 0° | |
| 45378. |
Why carbon form strongbond with nitrogen |
| Answer» It forms strong bond because of electronegativity difference between them...... | |
| 45379. |
Anyone uses discord |
| Answer» Yup | |
| 45380. |
Diffrence between short-circuit and over loading |
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Answer» Over loading occurs when two or more appliances of high power rating are connected is single plug which causes flow of current beyond its capacity .this leads to over loading. Short circuit occurs due to contact of live and neutral wire whereas overloading occurs due to use of appliances needing energy than provided |
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| 45381. |
What is placenta ? Define its structure. State the role of placenta in pregnant human female. |
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Answer» Thanks both of u After implantation a disk like tissue is formed between the uterus wall and embryo which is called placenta.Functions:-Through the placenta the requirement of the developing foetus like nutrition, respiration, excretion are get from yhe mother\'s body. Placenta is a muscular organ develops in female body after fertilisation. Its one end joined with the developing embroy ond othe to the mothers body. Its helps the embroy in two ways 1. For nutrition2...for excreation |
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| 45382. |
Aqueous solution |
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Answer» Solution having some amount of water Liquid solution |
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| 45383. |
How does the mechanism of heredity work? |
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| 45384. |
Difference between estrification and sponification....? |
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Answer» Hmm Aapko smjh Mai aa gaya........your Welcome?? Ok thanx Yaar simran or book Mai dekh Lena ? ..1....saponification involves reaction between carboxylic acid and a base whereas esterification involves reaction between alcohol and carboxylic acid. 2....esterification needs as a catalyst whereas saponification do not need. |
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| 45385. |
Advantage for aquatic animals in oxygen uptake vompared to terrestrial animals |
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| 45386. |
Where oestergoen is produced |
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Answer» Ovary In female ovaries |
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| 45387. |
Working of electric generator and electric motor in simple words |
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| 45388. |
What is daughter cell |
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Answer» A new cell formed during asexual reproduction . For example - amoeba,planaria etc. The new cell formed after any type of asexual reproduction is called a daughter cell |
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| 45389. |
Tell me the whole process of electrolyte which we use in high reactive metals |
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| 45390. |
plz write correct colour coding of live ,neutral and earth wires. ... |
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| 45391. |
How to learn all important question |
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| 45392. |
How to study |
| Answer» Mind te | |
| 45393. |
Define The process of nephron.... ?????? |
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| 45394. |
limitations of nervous system |
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Answer» 1. Nerve impulses can be detected only by neurons. 2. It cannot create an electrical impulse just after an impulse. It cannot control reflects anction It cannot control our feelings ?? |
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| 45395. |
Define the process of digestion in amoeba ??? |
| Answer» Amoeba consumes food through the process of endocytosis. Then a food vacuole is formed around the food particle. In this food vacuole the food is digested. The waste materials are removed from the body through the process of exocytosis. | |
| 45396. |
What are the cosses of diabetics |
| Answer» if insulin is not released in proper amounts,people may suffer from diabetes | |
| 45397. |
what is tastis |
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Answer» Testes produce male germ cell called sperm and its secrete male *** hormones testosterone Testes is an organ which secrete male *** hormone testosterone . Tastis ??? |
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| 45398. |
Name the part of brain which controls (a) voluntary actions (b) involuntary actions. |
| Answer» a)cerebrum. b)medulla | |
| 45399. |
Relationship between moving lens and object to get sharp image on screen |
| Answer» If we increase the distance from the lense we get sharp image | |
| 45400. |
How to find the reading of voltmeter and ameter |
| Answer» Connect voltmeter in parallel and ammeter in series | |