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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.
| 1151. |
What is the order of stability of carbonates of alkali metals? |
| Answer» Order of stability increses down the group in alkali metal It is due to the fact that a larger cation can stablise alarger anion and smaller cation can stablise a smaller anion????<br>Order of stability increased down the group due to high lattice energy. | |
| 1152. |
define disproportionation reaction |
| Answer» This is a reaction which act as both oxidizing as well as reducing agent<br>It is a special kind of reaction in which same element undergoes oxidation as well as reduction .e.g. 2H2O2---2H20+O2,where the oxidation state of oxygen is -1 in H2O ,it oxidized to O2 (0) and reduced to -2 in H20<br>Disproportion is a chemical reaction typically a redox reaction where a molecule is transformed into two or more dissimilar product | |
| 1153. |
Define pauli\'s excelu principal |
| Answer» The Pauli exclusion principle is the quantum mechanical principle which states that two or more identical fermions cannot occupy the same quantum state within a quantum system simultaneously. I hope it may help u...??<br>Pauli\'s exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. | |
| 1154. |
Hesinberg uncertinity principle |
| Answer» It states that it is impossible to measure the position and momentum of a moving particle<br>Heisenberg\'s uncertainty principle states that it is impossible to determine simultaneously, the exact position and exact momentum or velocity of an electron. | |
| 1155. |
Which one is more acidic out of ethane,ethane,ethylene |
| Answer» ☺☺☺☺<br>Ethyne is most acidic because it contains acidic hydrogen ( hydrogen connected with sp hybridised carbon ) %s character is 50%, hence most electronegative.<br>You wrote ethane 2 times.... | |
| 1156. |
When "Alklidene group " is used ? with IUPAC name or with common name |
| Answer» Suppose if we have a parent chain and a CH3 group attached to it then we name it as methyl....but when double bond is not taken in parent chain then that CH3 is changed to CH2 then we call it as "methyledene" or" Methylene "...........or if u dont understand so suppose a parent chain started with a double bond and ended with a double bond and also a carbon is combined to it with double bond ( =CH2 with parent chain) . This is an alklidene group we name its member as 1. Methyledene, ethyledene etc. | |
| 1157. |
explain in detail about molarity , molality , and normality?? |
| Answer» Oooo...then its good?<br>Mere exams ongoing hai and i was just revising the topics<br>Normality is number of mole equivalents per liter of solution.<br>Molality (m) is defined as the number of moles of solute per kilogram of solvent. molality = moles of solute/kilograms of solvent.<br>Molarity (M) is the concentration of a solution expressed as the number of moles of solute per liter of solution<br>By the way don\'t mind but,...I want to ask that session khatam hone ko hai ....and u want the explaination of these topics..??<br>Just go to the revision notes section of chemistry of that chapter in this app ...u will definitely get better outcome... | |
| 1158. |
What is limiting reagent? Explain with example. |
| Answer» Prakhar is right<br>The limiting reagent (or limiting reactant or limiting agent) in a chemical reaction is the substance that is totally consumed when the chemical reaction is complete. | |
| 1159. |
What is the general formula for aromatic hydrocarbons |
| Answer» Since aromatic hydrocarbons are also known as arenes. So, general formula of arenes is C(n)H(2n-6y), where y is the number of cyclic rings in the arene. | |
| 1160. |
What is organic reaction mechanism |
| Answer» \tReaction mechanism involves breaking and forming bonds, movement of electrons and rate follows sequential description of rate of reaction.\tA covalent bond can get cleaved either by homolytic cleavage (or) by heterolytic cleavage.\xa0In homolytic cleavage a bond breaks in such a way that each broken part gets one of the two bonded electrons.\tHomolytic cleavage results in the formation of neutral atoms (or) groups with one unpaired electron. These are known as free radicals. The free radicals thus formed are highly reactive due to the presence of unpaired electrons. | |
| 1161. |
Which substance has highest composition in acid rain? |
| Answer» Sulphates and nitrates | |
| 1162. |
Mole is si unit of |
| Answer» Amount of substance<br>Amount of substance | |
| 1163. |
Why standard heat of formation of diamond is not zero though it is an element |
| Answer» | |
| 1164. |
what are fused halides? |
| Answer» Metal halides when found in fused or molten state they are called as fused halide like molten sodium chloride is a fused halide | |
| 1165. |
How to determine the oxidation number |
| Answer» Rules are must without rules u get confused infinding on<br>There are certain rules ......so u have to read all the rules from redox chapter......from ncert ......if u will get any confusion then u can take help of youtube or we will help u | |
| 1166. |
Sir what is the suffix of acid halide |
| Answer» Oyl halide | |
| 1167. |
Sir in class xi in annual exam whole syllabus will come or half portion will come.. |
| Answer» Whole syllabus will come.100% full book is going to come in all annual exams for all classes<br>Apne sahi bat bola<br>Whole syllabus.......because 11th class mein aapko 12th class ke liye prepare kiya jaata hai isliye complete syllabus aayega taaki 12th mein course learn krney mein bachho ko problem naah ho<br>Depends on school<br>whole syllabus | |
| 1168. |
Why size of action is always smaller than that of its neutral atom |
| Answer» Because :-1. They have less electrons than parent atom since nuclear charge remains the same. So they are tightly held by the nucleus due to which the atomic size decreases.2. Also , as electron decreases the shielding effect ( electron - electron repulsion) decreases , due to this also cation is always smaller than its parent atom. | |
| 1169. |
What is carcinogenecity |
| Answer» Ability of a carcinogen to produce invasive cancer cells from normal cells. | |
| 1170. |
Eqillibrium , thermod , hydrogen & solid states ke imp points/concepts ka hai❓ |
| Answer» Haan ji<br>Bhavika ??? | |
| 1171. |
Write expression for kp and kc for the decomposition reaction of calcium carbonate |
| Answer» Caco3 decomposes asCaCO3----->CaO+CO2So,∆n=1Therefore, Kp=kc(RT) | |
| 1172. |
How dissociation constant of a weak acid is related to its degree of dissociation |
| Answer» | |
| 1173. |
What are metals? |
| Answer» Those element which gives hydrogen to other compound is known as metals<br>A solid material which is typically hard, lustrous or shiny, malleable or can be beaten into sheats, ductile or can be drawn into wires with good electrical and thermal conductivity is called metal. | |
| 1174. |
Using stock notation represent the following compounds : HAuCl4 |
| Answer» HAu[III]Cl4<br>HAu[+3]Cl4Au =3 | |
| 1175. |
Carbon monoxide gas is more dangerous than carbon dioxide gas...why??? |
| Answer» Excellent answer yakshi<br>Carbon monoxide is formed by incomplete combusion.......and have toxic nature while carbon dioxide is not that much bad for us.........and yes a very common reason is that when we inhale and if carbon monoxide will react with haemoglobin in our blood then it will form a complex named Carboxyhaemoglobin.......which is much more stable than that haemoglobin which was already present........so ......it will stop circulation in our body.....hope it is clear to u.....if any doubt then ask without hesitation<br>Carbon dioxide (CO2) and carbon monoxide (CO) gases are emitted during the combustion of various fuels. Carbon monoxide is poisonous, whereas carbon-dioxide is non-toxic in nature. Carbon monoxide is poisonous because it is capable of forming a complex with haemoglobin (carboxyhaemoglobin), which is more stable than the oxygen-haemoglobin complex. The concentration range of 3-4% of carboxyhaemoglobin decreases the oxygen-carrying capacity of blood. This results in headaches, weak eyesight, nervousness, and cardiovascular disorders. A more increased concentration may even lead to death. Carbon dioxide is not poisonous. It proves harmful only at very high concentrations. | |
| 1176. |
Relation b/w kc and kp |
| Answer» Hope this help u<br>Relationship between Kc and KpIn a reaction,aA + bB = cC + dDwe can writeAssuming the gaseous components to behave ideally,PiVi = niRTorwhere (i) is the molar concentration of the species \'i\'.n = (Number of moles of gaseous products)-(Number of moles of gaseous reactants).Thus, n is equal to the difference in the number of gaseous moles of products and the number of gaseous moles of reactants. The above equation can be rewritten asKp = Kc (RT)n<br>If ∆n < 0,then kp>kc.............If ∆n=0 then kp=kc..........If ∆n > 0 , then kp<kc<br>Kp=kc (RT)^∆n | |
| 1177. |
How a atom know that he have to react or bonding rather he did not have brain |
| Answer» Atom have a electrostatic energy which attract other electron . If an atom have energy to attact other atom they will take bonding with each other.For example-If you have money then you can give party to your friend and attract your friend and your friend is with you and a energy is created between you and your friend but if you have not money then you cannot give party to your friends and your friends have not attachement with you. | |
| 1178. |
What is the formula of alcohol? |
| Answer» C(n)H(2n+1)OHWhere n=no. Of carbon<br>Nancy rajput is right.....that is the real formula<br>OH<br>C2H50H<br>OH<br>CnH2n+1 OH<br>Koi tho batao please | |
| 1179. |
What is covalent bond and polarising power |
| Answer» Polarising power is the ability of an atom or group of atoms to attract the shared pair of electrons toward itself.Its depends on these two factors.1] Polarizing power of a cation- Polarizing power is the tendency of metal cation to distort the electron cloud of anion.2] Polarizibility of anion- Tendency of anion to get distorted because of the polarizing power of cation is called polarizibility power of anion.<br>the bond formed by mutual sharing of electrons is called covalent bond | |
| 1180. |
Why ionisation enthalpy decreases down the group? |
| Answer» Because atomic radius increase<br>The amount of energy required to remove the outermost electron from an isolated, neutral gaseous atom to form a cation is known as ionisation energy.Ionisation energy decreases as we proceed down the group. This is because the size of the atom increases as we move down the group, and therefore the attraction between the nucleus and the outermost electron decreases. Because of this, it becomes easier for atom to lose the valence electrons. For example, the ionisation energy of potassium is more than that of sodium. Ionisation energy increases as we move from left to right across a period. Thus the ionisation energy of carbon is more than that of lithium.<br>*Skip<br>Hope it helps ....and haa don\'t by seeing its size???<br>As we know...Ionisation enthalpy is defined as the amount of energy required to remove an electron from an isolated gaseous atom............And now the answer of ur question is as we go down the group , the size of atom increases ,therefore...distance b/w electron(outermost shell) and nucleus is get increased ...therefore , force of attra . Is less blw nucleus and electron...therefore, less ionization enthalpy is required as we go down the group....<br>Just because the number of shells increase down a group. Due to which energy needed to ionise an electron becomes easy as Z effective decreases. | |
| 1181. |
What is the difference between Orbit and orbital |
| Answer» Well explained<br>Orbit is a path around the nucleus in which electrons revolve it represents the movement of electron in one plane.......it is circular and elliptical in shape...............while.....orbital is the 3D space around the nucleus..... where probability of finding electron is maximum....and it may be spherical dumbell and double dumbell in shape<br>Orbit is well defined 2D circular path around the nucleus in which the electrons revolve on the other hand orbitals is 3D space around the nucleus within which the probability of finding the electrons is maximum. ➡️Concept of orbit is not accordance with the wave nature of electrons on the other hand orbitals is in accordance with the wave nature of electrons. ➡️orbit do not have directional characteristics on the other hand All orbitals except s-orbitals have directional characteristics. | |
| 1182. |
Autoprotolysis of water |
| Answer» Reaction is......2 H2O <_-_-_-_-_-> OH^- + H3O ^+<br>In autoprolysis.........we take two identical molecules......as u asked for water so.......we will take two identical water molecule but remember......one of them will act as" Brønsted acid" and other will act as "Brønsted base"......Brønsted was a scientist who gave a theory and the theory was..that......." when acid and base will react then acid will form its conjugated base and base will form its conjugated acid".......so.....when 2 water molecules will react with each other in this condition then Brønsted acid will release a proton and Brønsted base will accept it....... | |
| 1183. |
hydrogen peroxide |
| Answer» BaO2.8H2O(s)+H2SO4 (aq) ➡️BaSO4(s) +H2O2(aq) +8H2O(l). This reaction give H2O2 which is hydrogen peroxide.<br>Sorry ......u will get hydrogen peroxide.....there was a mistake.....hope it is clear to u<br>Formula is H2O2........if u will provide hydrogen , limited oxygen then u will get hydrogen oxide which has oxidation state 1..... | |
| 1184. |
What is the most important question in chemistry |
| Answer» Yes u are right yakshi<br>Each and every chapter is imlortant in chemistry.... might be few topics in each chapter could be skipped. U should have asked which questions are not important topics that answer might be small<br>Plz ask chapterwise..... i promise i will try to tell u then<br>If u will ask chapterwise ......then we will be able to tell u.....but now u r asking from whole book .......so how we will tell u ......there are 2 books of chemistry and lots of chapter which are equally imp.....<br>I think all question from chemical bonding are very imp | |
| 1185. |
numerical on molecular orbital theory |
| Answer» Xx | |
| 1186. |
Mention two important ore of boron |
| Answer» Borex & kernite...... but I\'m not sure about kernite | |
| 1187. |
Define delta H.What will be the sign of delta H in Endothermic reaction? |
| Answer» For endothermic reaction, ∆H is positive. So an endothermic reaction can proceed by decreasing its Gibbs energy, if ∆H - T∆S is negative, which is possible only if ∆S is positive.<br>delta H is change in enthalpy | |
| 1188. |
what happens to the rate of forwrad and rate of backward when equilibrium attained? |
| Answer» RATE OF FORWARD AND RATE OF BACKWARD BECOMES EQUAL<br>The ratio of rate constant of forward reaction and backward reaction is also constant.or K=product/reactant. | |
| 1189. |
Structure of 4-en -2-yl hex-1-amide |
| Answer» | |
| 1190. |
2017 cbse sample paper set A |
| Answer» | |
| 1191. |
Mole cocept questions |
| Answer» U can refer in this app, or guide. But ncert solved and unsolved is more than enough i think soo<br>Dinesh also<br>Conceptual questions ke liye pradeep try krna jaha tak mujhey lagta hai..... | |
| 1192. |
Write any one molecule in which octet rule is violated ? |
| Answer» Electron-deficient molecules represent the second violation to the octet rule. These stable compounds have less than eight electrons around an atom in the molecule. The most common examples are the covalent compounds of beryllium and boron. Hope this will help u | |
| 1193. |
How the balance redox reaction in easy steps ?help me? |
| Answer» Thanks for suggestion<br>Use you tube<br>Yes plz......physics wallah try kro.....????<br>By hit and trial method<br>U are right Harshit<br>Search out on youtube a channel named( physics wallah) gives a best trick to solve it..... | |
| 1194. |
Why does h2o2 cannot be stored for prolonged periods |
| Answer» It is because of the reason that Hydrogen peroxide when kept for long time will under go auto-oxidation and releases oxygen and water. This process takes place slowly.2H2O2 → 2H2O + O2<br>H2O2 is very unstable and highly reactive. Its vapours are explosive in nature at normal temperature and pressures. It decomposes easily and can lead to hazardous reactions. Hence very high care should be taken for the long time storage of H2O2.It should be stored in cool, dry, well-ventilated area and away from any flammable or combustible substances. It should be stored in non-reactive containers. As it breaks down quickly when exposed to light, it should be stored in an opaque container (brown bottles). | |
| 1195. |
Find molar concentration of Na+ ion and I so4 _2 . In 0.04 molarity sodium sulphate solution |
| Answer» | |
| 1196. |
State as to why a solution of Na2CO3 is alkaline? |
| Answer» When sodium carbonate dissolves in water it dissociates into two sodium (Na+) ions and a carbonate (CO3–2) ion;-Na2CO3 (s) —-> 2 Na+(aq) + CO3–2(aq)The carbonate ion is able to remove protons (H+) from water to form bicarbonate ions and hydroxide ions. Hence it is the conjugate base of the bicarbonate ion;CO3–2(aq) + H2O(l) ←-> HCO3-(aq) + OH-(aq)The overall increase in OH- ions due to these reactions results in an increase in the pH of the solution, and cause it to become alkaline. | |
| 1197. |
Explain HBr on CH2=CH2 |
| Answer» | |
| 1198. |
Abou Nomenclature |
| Answer» | |
| 1199. |
Waht is free redical?? |
| Answer» Radical, also called Free Radicalmolecule that contains at least one unpaired electron. Most molecules contain even numbers of electrons, and the covalent chemical bonds holding the atoms together within a molecule normally consist of pairs of electrons jointly shared by the atoms linked by the bond.Hope this will help u<br>Free radical is an atom or group of atoms having an unpaired electron.For example: A-B -> A• + B•In this example A• and B• are free radicals.<br>A free radical reaction is any chemical reaction which involves free radicals.In the mechanism of a chemical reaction if the attacking reagent is free radical then that reaction mechanism is called free radical mechanism.Example: Halogination of alkanes | |
| 1200. |
What is the difference between organic and inorganic and physical chemistry....... |
| Answer» Organic Chemistry It is a branch of chemistry which deals with the study of carbon-based compounds. It mainly applies to the study of the behavior, characteristics, compositions and the properties of the organic compounds. It is also known as The Chemistry of Life.Inorganic Chemistry A branch of chemistry that deals with the study of metals and gaseous matter or materials which do not contain carbon as an element in it is called Inorganic chemistry. It is opposite side of Organic Chemistry.Physical Chemistry The combined study of using physics and chemistry to explain chemical systems is called Physical chemistry. This branch relates to the physical properties along with the structure of matter and energy. The sub-branches coming under this field are quantum physics and thermodynamics. | |