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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.
| 3151. |
How many cm are in 1pm |
| Answer» 1 × 10-10\xa0centimetre | |
| 3152. |
Why the protons are indivisible and why atoms of different elements are different in properties |
| Answer» | |
| 3153. |
Structure of homologous series |
| Answer» A\xa0homologous series\xa0is defined as a family or group of structurally similar organic compounds all the members of which contain the same functional group, Show a gradation in physical and similarity in chemical properties and any two adjacent members of which differ by a -CH2\xa0group. The individual members of such a series are called\xa0homologues\xa0and the phenomena is called\xa0homology.Alkanes constitute a homologous series.CH4\xa0MethaneC2H6\xa0EthaneC3H8\xa0PropaneC4H10\xa0Butane | |
| 3154. |
How to solve no. of per mole.......... |
| Answer» No. Of moles = volume of gases at STP / 22.4 L gas at STP<br>No of moles= Given mass/ Molecular massNo of moles= no. of molecules/6.022×10^23 | |
| 3155. |
How many grams are there in 4.50 moles of Ba(NO2)2 |
| Answer» No of moles =4.50 molMolar mass= 137+2×14+4×16 = 229u No. of moles= Given mass/Molar mass 4.50 = w/229 4.50×229= w w= 103.5g | |
| 3156. |
What is the value of 1 mole |
| Answer» 6.022×10^23<br>A\xa0mole\xa0is defined as that\xa0amount\xa0of substance which contains Avogadro\'s number of atoms if the substance is atomic or Avogadro\'s number of molecules if the substance is molecular.\xa01 mole\xa0of carbon atoms = 6.022 ×1023\xa0atoms of carbon.<br>6.022x10²³ | |
| 3157. |
Explain the world orbitals? |
| Answer» Orbitals are the 3D spaces where the probability of finding the electron is maximum | |
| 3158. |
How many mole of sulphur are there in 64g of sulphur? |
| Answer» 1.5 10 power 23 molecules | |
| 3159. |
Use molecular orbital theory to explain why the Be2 molecule does not exist |
| Answer» | |
| 3160. |
?what is chemistry? pls ans me ??? |
| Answer» It is a branch of science that deals with composition, structure and properties of matter and the changes in which the matter undergoes under different conditions.....<br>It is the branch of science | |
| 3161. |
Why aluminum metallic is so hard mates? |
| Answer» | |
| 3162. |
BrO-3=Br2 find it n factor |
| Answer» 3<br>3 | |
| 3163. |
Find the volume of solution when 212gram Na²Co³ is dissolved in water to prepare its 0.2M solution |
| Answer» | |
| 3164. |
Ammonium nitrate is inflammable ? |
| Answer» Ammonium nitrate\xa0does not burn on its own. Instead, it acts as a source of oxygen that can accelerate the combustion (burning) of other materials. For combustion to occur, oxygen must be present. | |
| 3165. |
Application of markonikove rule... |
| Answer» A protic acid<br>When a protic acid (HX) is added to an asymmetric alkene, the acidic hydrogen attaches itself to the carbon having a greater number of hydrogen substituents whereas the halide group attaches itself to the carbon atom which has a greater number of alkyl substituents.It is important to note that the Markovnikov’s rule was developed specifically for its application in the addition reaction of hydrogen halides to alkenes. | |
| 3166. |
What is the si unit of molarity |
| Answer» SI unit of molarity is mol /L<br>mol dm-3<br>\xa0In chemistry, the most commonly used unit for molarity is the number of\xa0moles\xa0per\xa0litre, having the unit symbol\xa0mol/L\xa0or\xa0mol⋅dm−3\xa0in SI unit. A solution with a concentration of 1\xa0mol/L\xa0is said to be 1 molar, commonly designated as 1 M.<br>Molarity is the number of moles of a substance per liter of solution, also known as molar concentration. A capital M signifies solutions labeled with molar concentration.SI units\xa0molarity\xa0: mol dm-3. | |
| 3167. |
What is Lewis rule...? |
| Answer» Thank you<br>Lewis suggested that a chemical bond involved sharing of electrons.He described what he called the cubical atom,because a cube has 8corners , to represent the outer valence shell electrons which can be shared to create a bond . This is his octet rule<br>The representation of molecules in Lewis electron dot structure or just a Lewis structure is in honor of the\xa0American chemist Gilbert Newton Lewis.Lewis dot structures also called electron dot structures are diagrams that describe the chemical bonding between\xa0atoms in a molecule. They also display the total number of lone pairs present in each of the atoms that constitute the molecule. Lewis dot structures are\xa0commonly referred to as electron dot structures or Lewis structures.\xa0Lewis defined a base as an electron pair donor and an acid as an electron pair acceptor. | |
| 3168. |
How to solve no. of atoms per mol ..? |
| Answer» A\xa0mole is defined as the mass of the substance which consists of the equal quantity of basic units. Example atoms in 12 grams are the same as 12C. The basic units can be molecules, atoms or formula units based on the substance. A mole fraction indicates the number of chemical elements.\xa0One mole of any substance is equal to the value of 6.023 x 1023\xa0(Avagadro number). It can be used to measure the products obtained from the chemical reaction. The unit is denoted by\xa0mol.The formula for the number of moles formula is expressed asNumber of Moles = mass of substance/, the mass of one moleExample 1:\xa0Determine the number of moles in 95g of MnO2.Solution:GivenMass of MnO2\xa0= 95gMass of one mole MnO2\xa0= 86.94gNumber of moles formula isNumber of moles = Mass of substance / Mass of one moleNumber of moles = 95 / 86.94Number of moles =\xa01.092 mol\xa0 | |
| 3169. |
1 mol = ? |
| Answer» 6.02×10²³<br>A mole of a substance or a mole of particles is defined as exactly 6.02214076×1023 particles, which may be atoms, molecules, ions, or electrons. In short, for particles 1 mol = 6.02214076×1023. | |
| 3170. |
What is the cause of chemical bonding? |
| Answer» The\xa0causes\xa0of formation of a\xa0chemical bond\xa0are: Tendency of atoms to complete their octets or duplets by rearrangement of their valence electrons (octed theory). The system acquires minimum energy when atoms are at some equilibrium distance where attractive forces dominate over repulsive forces. | |
| 3171. |
Is chapter 4 in chmistry 11coming in exams or reduced from syllabus |
| Answer» | |
| 3172. |
What is average atomic mass ????????????????? |
| Answer» The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).Average atomic mass = f1M1\xa0+ f2M2\xa0+ … + fnMn\xa0where f is the fraction representing the natural abundance of the isotope and M is the mass number (weight) of the isotope.<br>1/12 mass of carbon 12 isotopes | |
| 3173. |
PLZ give me the Gay Lussac\'s law of gaseous volumes?????? |
| Answer» \xa0Gay-Lussac\\\'s Law of Combining Volumes:When gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the gaseous product, provided that all the volumes are measured at the same temperature and pressure.Example:One volume of hydrogen when mixed with one volume of chlorine, gives two volumes of hydrogen chloride gas at the same temperature and pressure.H2\xa0+ Cl2 ? 2HClThus the ratio 1:1:2 is simple.<br>According to the law..... In any reaction the volume of gas combine or form in simple ratio .... | |
| 3174. |
Is molar mass = molecular mass? only the SI units changes and the magnitude will be same ??? |
| Answer» Dude both are samee | |
| 3175. |
WHAT will be the molarity of a solution, which contains 5.85g of NaCl per 500ml |
| Answer» Molarity is no. if moles of solute per volume of solution (in litre)therefore moles of NaCl is 5.85/58.5 = 0.1volume of solution is 0.5 litremolarity = 0.1/0.5 = 0.2 | |
| 3176. |
Which of the following orbitals has the lowest energy? Explain(a) 4d (b) 4f (c) 5s (d) 5p |
| Answer» The order of the electron orbital energy levels, starting from least to greatest, is as follows: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.\xa05 s has lowest energy | |
| 3177. |
Questions based upon molarity |
| Answer» | |
| 3178. |
What is water?? |
| Answer» It is the product of two molecules of hydrogen and one molecule of oxygen. In simple words you take it when you are thirsty.<br>H2O<br>Usne yaha likha kya tha?<br>Paani<br>H2O | |
| 3179. |
What is a chemistry ? ? |
| Answer» Chemistry is the branch of science that studies the composition, properties, structures and interaction of matter.??<br>Hlo. Chemistry is the complex emotional or psychological interaction between people....or .. .. The branch of science concerned with the substances of which matter is composed the investigation of their properties and reactions to form new substances ...... hope u understand...???? | |
| 3180. |
surface tension of liquids |
| Answer» Really helpful.<br>Surface tension\xa0is the property of any liquid by virtue of which\xa0tries to minimize its free surface area.Surface tension of a liquid is measured as the force acting per length on an imaginary line drawn tangentially on the free surface the liquid.Surface tension S = Force/Length = F/l = Work done/Change in areaIts SI unit is Nm-1\xa0or Jm-2\xa0and its dimensional formula is [MT-2].It is a scalar quantity. Surface tension is a molecular phenomenon which is due to cohesive force and root cause of the force is electrical in nature.Surface tension of a liquid depends only on the nature of liquid and independent of the surface area of film or length of the line .Small liquid drops are spherical due to the property of surface tension. | |
| 3181. |
How is the electronic configuration of neon 3s^23p^6 |
| Answer» Plz answer someone | |
| 3182. |
What are elements and why they are arranged in periodic table! |
| Answer» Elements- A pure substance which can neither be decomposed into nor built from simpler substances by ordinary physical or chemical methods.Between 1800 to 1869, the number of identified elements had become nearly 63. With such large number of elements, it become difficult to study individually the chemistry of all these elements and their innumerical compounds. To study the chemical and physical properties systematically, the elements are arranged in a periodic table....... Hope you understand ??<br>They are arranged in periodic table so that we can learn in easily | |
| 3183. |
Explain the electronic configuration of he and n according to Pauli and hunds principle |
| Answer» Hund\'s Rule, the Aufbau Principle, and the Pauli Exclusion Principle help us define how electrons fill the orbitals within an atomic structure.The Pauli Exclusion Principle states that no two electrons can have the same quantum number, and thus,electrons in the same orbital must have opposite spins.<br>Ye konse chapter m h | |
| 3184. |
How many moles are in 4.4 g of CO2 |
| Answer» No. Of moles = Given mass/molar mass=4.4g/44g=0.1 | |
| 3185. |
What is van der waal s radius?? |
| Answer» Thanks shravan ap kon ho<br>This is ur ans.. Ankit bro<br>van der Waals radius\xa0is a measure for the size of an atom that is not chemically (ionically or covalently) bound. In general a\xa0van der Waals radius\xa0is defined as half the closest distance of two equal, non-covalently bound, atom | |
| 3186. |
Define octet rule # |
| Answer» ?<br>Thanks sona<br>Octet rule: Atoms can combine either by transfer of valence electrons from one atom to another (gaining or loosing) or by sharing of valence electrons in order to have an octet in their valence shells.<br>Thanks bro<br><div style="border:0px; margin:0px; padding:0px; text-align:start; -webkit-text-stroke-width:0px">Octet rule:</div><div style="border:0px; margin:0px; padding:0px; text-align:start; -webkit-text-stroke-width:0px">\tAccording to the electronic theory of valence, every atom tries to attain the octet configuration (presence of eight electrons) in its valence shell by losing, gaining or sharing of electrons. This is known as the\xa0octet rule.\xa0\t\t\xa0\t\t\t\xa0The stable octet can be achieved by the transfer of electrons or by sharing of a pair of electrons between the atoms. In this process, each atom attains a stable outer octet of electrons.\t</div> | |
| 3187. |
limitations of octet rule? |
| Answer» thanku<br>The major limitations of Newlands\' law of octaves were : (i) It was applicable to only lighter elements having atomic masses upto 40 u, i.e., upto calcium. After calcium, the first and the eighth element did not have similar properties.<br><article data-post-id="86502" data-topic-id="69151" data-user-id="10501" id="post_2">Limitations of octet rule:\t\tThe incomplete octet of the central atom.\tIn some compounds, the number of electrons surrounding the central atom is less than eight.\tThis is especially the case with elements having less than four valence electrons. Examples are LiCl, BeH2\xa0and BCl3.\t\t\tIn a number of compounds of thir period elements, there are more than eight valence electrons around the central atom.\this is termed as the expanded octet. The octet rule does not apply in such cases.\tExamples of such compounds are SF6, H2SO4.\t\t\tThe rule is based on inert nature of noble gases. However, some noble gases (for example xenon and krypton) combine with oxygen\tand fluorine to form a number of compounds like XeF2, KrF2, XeOF2\xa0etc.\t<section><nav>\xa0</nav></section><section>\xa0</section></article> | |
| 3188. |
full form of MBPS |
| Answer» 6 bits h, aur profile pr meri pic h... vhi h ya koi aur<br>nhi Abhi mne dekha nhi h<br>Aap pe msg aya tha<br>Hii sona mne apko msg kkiya tha mb pr vo aap the kya<br>\xa0\xa0\xa0\xa0The\xa0Mbps full form\xa0is Megabits per Second.The Mbps full form is Megabits per Second. It is a very common word that we come across in our daily lives. However, either we tend to overlook it or just that it does not matter to us. The vitality of Mbps is so essential in this world where we want faster internet results and surfing. Thus, it is a must for all to know the full meaning of mbps, which is the speed of transferring data. It is one million bits or one thousand kilobits of data that is transferred per second. | |
| 3189. |
What are hybridisation States of each carbon atom in the following compound? |
| Answer» (i) C-1 is sp2\xa0hybridised. C-2 is sp hybridised.(ii) C-1 is sp3\xa0hybridised. C-2 is sp2\xa0hybridised. C-3 is sp2\xa0hybridised.(iii) C -1 and C-3 are sp3\xa0hybridised. C-2 is sp2\xa0hybridised.(iv) C-1 is sp2\xa0hybridised. C-2 is sp2\xa0hybridised. C-3 is sp hybridised.(v) C6H6\xa0\xa0All the 6 carbon atoms in benzene are sp2\xa0hybridised. | |
| 3190. |
Line spectrum of hydrogen text book notes formation |
| Answer» \xa0The lines in the emission spectrum of hydrogen are classified into 5 series. Lyman series, Balmer series, Paschen series, Brackett series and Pfund series.The first series of lines corresponds to n1 is equal to 1 and n2 equal to 2, 3, 4, and so on. This is known as Lyman series and it appears in the ultraviolet region.Similarly for Balmer, Paschen, Brackett and Pfund series, n1 =2, 3 , 4 and 5 respectively.These series lie in different regions.Lyman series lies in the Ultraviolet region. Balmer series lies in the visible region while Paschen, Brackett and Pfund lie in the infrared region.You can also see our episode on Spectrum where everything is explained with animations. | |
| 3191. |
Na=14.28%S=9.92%H=6.20%O=69.60%Calculate the empirical formula. |
| Answer» Empirical formula= Na2SH20O4Molecular formula= Na2SO4.10H2O | |
| 3192. |
What is the electronic configuration of 118th element? |
| Answer» <th>Classification:</th> <th>Oganesson is a noble gas</th> \tProtons:118Neutrons in most abundant isotope:176Electron\xa0shells:2, 8, 18, 32, 32, 18, 8Electron configuration:[Rn] 5f14\xa06d10\xa07s2\xa07p6\xa0(presumed)\t | |
| 3193. |
Anyone know MB app full form form pls btao |
| Answer» matrubharti app yll<br>Mega bite | |
| 3194. |
What is resonances |
| Answer» In chemistry,Resonance is an intramolecular electronic process which involves change in position of Pi bond(s) or non bonding electron ( sometimes sigma bond also) but change of position of any atom occur in this process by changing the position of Pi electrons or non bonding electrons. | |
| 3195. |
How can you know that anode or cathode rays are travelling in straight Line ? |
| Answer» William Crookes in 1879 demonstrated that cathode rays travel in straight lines. He placed an opaque object like metal cross in the path of cathode rays in a discharge tube. It was observed that a sharp shadow of the cross was cast on the glass behind the cross. A shadow of metal cross under the circumstances can be formed only if cathode rays travel in straight lines and cannot bend round the corners of the metal cross. | |
| 3196. |
Trends in chemical reactivity of group 13 elements |
| Answer» | |
| 3197. |
clear the concepts of new syllabus |
| Answer» 20% syllabus will be reduced in class 11 because of corona.<br>Maths mein 4 chapters reduce Kar diye gye h | |
| 3198. |
Why JJ thomson decrease the pressure inside of the tube in cathode rays experiment. |
| Answer» This topic is deleted this year due to 30% reduction in syllabus. You can check new syllabus on this app.<br>In low pressure,no. of gas molecules will be lowSo that cathode rays would not collide with the gas molecules and travel in a straight path | |
| 3199. |
Is physics and chemistry is easy in11th plzz tell |
| Answer» what u all are taking<br>Physics of 11th is gernally contain 70% of mathematically topic if you like math you can choose it and the chemistry contain lots of theory in which you find 45% content of 10th and 9thNow its only depends on you will you have guts to do this because if you took this subject you have to do your best ...<br>Yes If you learn all things by heart it\'s easy<br>thnks<br>Yes it\'s much easier if you study it mindfully | |
| 3200. |
How much water must be added to 50.0 mL of 2 M HCL solution to dilute it to M/2? |
| Answer» Total volume =200 and added 200-50=150<br>Nhi pta | |