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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 4351. |
Hey any on jst sujjest me any channel\'s name for chemistry ...? |
| Answer» Physicwallah | |
| 4352. |
Name the phenomenon explained by wave nature of radiation. |
| Answer» Most commonly observed phenomena with light can be explained by waves. But the photoelectric effect suggested a particle nature for light. | |
| 4353. |
Calculate the molality of 98% H2SO4 aq solution by mass. |
| Answer» \tMolarity ( mole/L)- Assume an identical solution with volume 1L. Now, the total mass of this solution as per the data =1.84\xa0×1000= 1840 g. The amount of (mass) H2SO4 =1840\xa0×0.98=1803.2 g. Number of moles= 1803.2/98= 18.4 moles. Theerfore, Molarity =18.4 M\tMolality (mole(solute)/kg(solvent))- Assume an identical solution wherein there is 1000g of solvent. Thus here we will have the mass of H2SO4= 49000g (since, in this solution solute (H2SO4)is 98% and solvent thus is 2%). So, number of moles of H2SO4= 49000/98= 500. So , Molality = 500 mole/kg. | |
| 4354. |
Give a note on uses of H2O2 |
| Answer» Uses of hydrogen perioxide \tIt is used as bleaching hair.\tIt is used in pollution control treatments.\tIt is used as bleaching agent in industries making paper pulp etc | |
| 4355. |
What is the formula of sulphurous acid ? |
| Answer» H2so3<br>H2SO3<br>H2so3 | |
| 4356. |
Bhai logsub pass honge class 10 me |
| Answer» Ap logo ko sak ha ki tum pass hoge ya nahi<br>Pass to vse bhi ho jaenge?<br>Yes......<br>Result Kab ayega.... | |
| 4357. |
How does electronegativity and basicity vary down a group?Why? |
| Answer» | |
| 4358. |
Explain hydrides? |
| Answer» Hydride, in simple terms, is said to be the anion of hydrogen. It is a chemical compound where the hydrogen atoms exhibit nucleophilic, basic or reducing properties. Usually, in a hydride, the hydrogen has the oxidation number equal to −1. Some of the most popular examples include water (H2O), methane (CH4) and ammonia (NH3). | |
| 4359. |
what is the strenght of solution? |
| Answer» Strength of the solution is defined as the amount of solute in grams that is present in one litre solution. There are many quantities that represent the strength of the solution which is normality, molarity and molality. | |
| 4360. |
Calculate Molality of Nitric Acid solution in which mole fraction of nitric acid is 0.2 |
| Answer» | |
| 4361. |
How complete polytechnic entrance exam 2020 please tell me any one |
| Answer» I also don\'t know , u can check on google or you tube?. | |
| 4362. |
Scientific notation multiplication and division addition and subtraction |
| Answer» What\'s your question? Didn\'t u understand aboves topic?? | |
| 4363. |
Koi answer to karo yrr.......niche question hai mera |
| Answer» No need of sorry....i got it???<br>Sorry, I don\'t know about it\'s group. | |
| 4364. |
I am in 12th class. So please can you tell me that which ch of 11th class are important for 12 |
| Answer» Science or commerce<br>Each and every chapter<br>I think all<br>Organic chemistry must be at your fingertips since the second part of 12th chemistry text is strictly organic.I don\'t think class 11 physics is important for your boards and Biology as well.Limits and derivatives,relations and functions of class 11 are the base chapters for class 12 differentiation,continuity,functions etc.In a nutshell,half of the portions of class 11 is the base for your twelfth. | |
| 4365. |
An ore on treated with hcl gave a smelll of rotten egg name the type of ore |
| Answer» Amalgam is an ore or it is an alloy??I think it is an alloy.<br>Amalgam | |
| 4366. |
Friends i am compartment in chemistry how i prepare for my exam |
| Answer» Strong determination may also help you.Believe in yourselfAnd you will crack the compartment exam??All the best?<br>Avoid socal media.....and focus yourself on books......it\'s very simple | |
| 4367. |
How we read a human brain??? |
| Answer» Have u heard about psychology?If u want to knw then read the book of psychology.?? | |
| 4368. |
Write electronic configration of (N2-)..... No. Of electron here is 15......anyone answer plzz⏱️⏱️ |
| Answer» Just tell me in which group it lie....(1-15) or (15-20) | |
| 4369. |
Relative abundance |
| Answer» The relative amount in which each isotope is present in an element is called ,relative abundance | |
| 4370. |
All formulas of carius method |
| Answer» | |
| 4371. |
Dalton atomic theory |
| Answer» Dalton atomic theory mainly deal about the outer and inner structure of atom the main postule is that all mattet consist of atom and for more details you you can prefer 9 class reference book and ncert | |
| 4372. |
Bring out the difference between nucleophiles and electrophiles with examples |
| Answer» \tELECTROPHILENUCLEOPHILEAlso called as Lewis acidAlso called as\xa0Lewis baseThey are positively charged / neutralThey are negatively charged / neutralThey undergo electrophilic addition and electrophilic substitution reactionsThey undergo nucleophilic addition and nucleophilic substitution reactionsElectron-deficientElectron-richIt accepts a pair of an electron to form a covalent bondIt donates a pair of an electron to form a covalent bondAll carbocationsAll carbanionsExample: Hydronium IonExample: Chloride Ion\t | |
| 4373. |
What is chemistry?? |
| Answer» Thank you<br>Chemistry is the study of matter that help us to understand this physical world.?? | |
| 4374. |
Why doed physorption decreases with increase in temperature?? |
| Answer» | |
| 4375. |
Best reference book for chemistry class11? |
| Answer» mordern abc<br>Modern abc+ by Uttam Narayan Tripathi | |
| 4376. |
Is VOSO4 paramagnetic or diamagneticIf anyone has strength in butthole then please answer. |
| Answer» This section is for asking doubts not to judge strength in butthole?.Don\'t be oversmart okay?<br>Paramagnetic ???<br>Paramagnetic | |
| 4377. |
What volume of concentrated HCL is required to make 1 litre of 0.10 molar HCL |
| Answer» Please somebody answer me | |
| 4378. |
What is the normality of H2SO4 if molarity is 18.4 |
| Answer» Divide by valence factor. You will get 9.2 | |
| 4379. |
What is law of reciprocal proportion |
| Answer» Law of reciprocal proportion states that \'When definite mass of an element A combines with two other elements B and C to form two compounds and if B and C also combine to form a compound,their combining masses are in the same proportion or bear a simple ratio to the masses of B and C which combines with a constant mass of A\'. | |
| 4380. |
What is the difference in the origin of cathode ray and andode ray |
| Answer» Cathode rays consist of negatively charged material particles called electrons. These rays deflect towards the positive plate of an electric field. The charge to mass (e/m) for the particles in the nature of the gas taken in the discharge tube.Anode rays consists of positively charges material particles. These rays deflect towards the negative plate of an electric field. | |
| 4381. |
How can be mixture of o-nitrophenol and p-nitrophenol separated ? |
| Answer» While separating a mixture of ortho and para nitrophenols by steam distillation, o-nitrophenol will be steam volatile due to presence of intramolecular hydrogen bonds. In case of p-nitrophenol, intermolecular hydrogen bonding is present which results in strong association of molecules. Hence, p-nitrophenol is not steam volatile. | |
| 4382. |
What is stoichiometry?????? Plz answer me quick. I don\'t study at home due to lockdown. |
| Answer» Stoichiometry is an important concept in chemistry that helps us use balanced chemical equations to calculate amounts of reactants and products. Here, we make use of ratios from the balanced equation. In general, all the reactions that take place are dependent on one main factor, how much substance is present. | |
| 4383. |
Discovery of electron....✌️☺️☺️ |
| Answer» Thnku ?<br>JJ Thomson discovered electrons in 1897 using cathode ray experiment | |
| 4384. |
how much CO2 is required to precipitate 10g caco3 from ca(oh)2 |
| Answer» Ans:4.4gCa(OH)2 + CO2 gives CaCO3 + H2OFrom stoichiometry,we can understand that\'1 mole of Ca(OH)2 (molar mass:74g)\' reacts with \'1 mole of CO2 (molar mass :44g)\' to give \'1 mole each of CaCO3 and H2O. (molar mass:100g and 18g respectively)\'Or,44g of CO2 gives 100g of CaCO3.Hence,to precipitate 1g of CaCO3, 44/100g=0.44g of CO2 is required. (Unitary method)Therefore, 10g of CaCO3 is obtained from 0.44*10=4.4g of CO2... | |
| 4385. |
Difference between hypothesis and law?????? |
| Answer» A hypothesis is a tentative explanation that can be tested by further investigation. A theory is a well-supported explanation of observations. A scientific law is a statement that summarizes the relationship between variables. | |
| 4386. |
What is (bec) or bose- einstein condensate |
| Answer» BEC stands for Bose-Einstein Condensate which is defined as the state of matter of a dilute gas of bosons which is cooled to temperatures very close to absolute zero.<br>A form of matter | |
| 4387. |
Properties of electromagnetic radiation |
| Answer» | |
| 4388. |
Why Avogadro chose exactly 6.022 *10*23 as equal to 1 mole? |
| Answer» Eg of water:When Avogadro took 6.022*10^23 molecules of water,it weighed exactly 18g ie,the molecular mass of water.So avogadro number of any atoms/molecules/ions etc were called 1 mole and hence 18g of water=1 mole | |
| 4389. |
I am in class 11(given exams of 10) but still i am not able yo learn periodic table first 20 names |
| Answer» While you are in 11th,it is important to know the names of atleast first thirty elements of periodic table.You don\'t have to worry about it,slowly learn all the names part by part(like 5 elements a day) else,make a code for the elements connecting them to their own names so that you can easily remember | |
| 4390. |
Calculate the molar mass of h20 |
| Answer» 18 amu<br>H2OThe molecular mass of water, H2O= (2 × Atomic mass of hydrogen) + (1 × Atomic mass of oxygen)= [2(1.0079) + 1(16.00)]= 2.016 + 16.00= 18.016Approximate the value= 18.02 amu | |
| 4391. |
Define nature of the matter |
| Answer» Matter - any thing which has mass and occupies space is known as matter Matter can exist in three physical states 1- solid state 2- liquid state 3- gases Matter exhibits the following characteristics SOLID = Solid have definite shape and definite volume. LIQUID = liquid have definite volume but not the definite shape GAS. = gases have neither definite volume nor definite shape<br>\tAtomic hypothesis was given by many scientists. According to which everything in this universe is made up of atoms.\tAtoms are little particles that move around in a perpetual order attracting each other when they are little distance apart.\tBut if they are forced very close to each other then they rebel.\tFor example: - Consider a block of gold. It consists of molecules which are constantly moving. | |
| 4392. |
How can we calculate the valency of any element from lanthanoid or actanoid ??? |
| Answer» Electronic Configuration of LanthanidesLanthanides of first f-block have a terminal electronic configuration of [Xe] 4f1-14 5d 0-16s2 of the fourteen lanthanides, promethium (Pm) with atomic number 61 is the only synthetic radioactive element. The energy of 4f and 5d electrons are almost close to each other and so 5d orbital remains vacant and the electrons enter into the 4f orbital.Exceptions are in the case of gadolinium, Gd (Z = 64) where the electron enters the 5d orbital due to the presence of half-filled d-orbital and lutetium (Z = 71) enters the 5d orbital.Electronic Configuration of ActinidesActinides are the second series of elements of the f-block having a terminal electronic configuration of [Rn] 5f1-14 6d 0-17s2. The energy of 5f and 6d electrons are close to each other and so electrons enter into the 5f orbital.\xa0<br>Try kar ka | |
| 4393. |
What\'s electrochemistry |
| Answer» Electrochemistry is a branch of chemistry that deals with the interaction between electrical energy and chemical energy. It is broadly divided into two categories:\tProduction of chemical change by electrical energy i.e. the phenomenon of electrolysis\tConversion of chemical energy into electrical energy. i.e., the generation of electricity by spontaneous redox reactions. | |
| 4394. |
Had landot mix solution of silver nitrate and nacl separately or together in test tube |
| Answer» | |
| 4395. |
Calculate the molecular mass of H2O...?? |
| Answer» 1x2+16= 18<br>18 ?<br>Atomic mass of H=1u Atomic mass of O=16u Now, for H2O there are 2 Hydrogens and 1 oxygen So multiply the mass of Hydrogen with 2, mass of Oxygen with 1 and add both 1×2+16×1=2+16=18<br>2+16=18<br>The molecular mass of water is 18<br>10 | |
| 4396. |
Define second... |
| Answer» ???<br>Wait ✋ 1 second....?<br>The second is the base unit of time in the International System of Units, commonly understood and historically defined as \u200b¹⁄₈₆₄₀₀ of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. | |
| 4397. |
why atom have Structure. |
| Answer» You should think it like thisEVERYTHING IN HUMAN IMAGINATION IS MADE UP OF ATOMS. THEY ARE THE TINY PART IN WHICH ANYTHING IN EXISTENCE CAN BE BROKEN (EVEN ATOM MEANS INDIVISIBLE) SO A ATOM DOESNT HAVE A SPECIFIC STRUCTURE IT COMPRISES OF WAVE AND MATTER HENCE WE CAN JUST ASSUME THAT THE ATOM HAS A SPHERICAL STRUCTURE OR ELECTRON REVOLVE IN CIRCULAR ORBIT (NO ONE HAS PROVED IT )(EVEN IF U THINK OF BOHR ,RUTHERFORD OF OTHERS)(WE JUST MADE A PROBABLE DIAG. OF ATOM WITH QUANTUM THEORY) SO WE JUST ASSUME THAT THE ATOM HAS SOME STRUCTURE. | |
| 4398. |
Define SI unit of length..? |
| Answer» meter<br>?<br>???<br>Oh hoo<br>Kha t inna dino sa<br>Hn....<br>Mast bhut dino bd aai ho<br>Define it ?<br>Gud...n u??<br>Metre<br>Hello aadya how are you | |
| 4399. |
Unit of luminous intensity?? |
| Answer» ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????<br>In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.<br>Kuch nhi ?<br>Kya huaa......... .......aapko<br>??<br>Thanks sizuka ?<br>This SI unit is used to measure the luminous intensity of a light source which is moving in a specific direction. It is also sometimes referred to as candle and represented as cd / m 2.<br>Candela ? | |
| 4400. |
If neutrons were discovered by Rutherford, then why it is said that Chadwick discovered neutrons? |
| Answer» Both are ❌ wrong. Neutrons were discovered by chadwick. Rutherford discovered nucleus of atom and not protons. Protons were discovered by E. Goldstein. Nucleus consists of both protons and neutrons.<br>There is a misunderstanding .Chadwick discovered neutron while Rutherford discovered proton .<br>No...Neutron is discovered by Chadwick......Rutherford discovered protons ? | |