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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.
| 4501. |
State huckel rules |
| Answer» It states that a compound is aromatic only and only if it have (4n+2)π electrons and anti aromatic if it have (4n)π electrons where n=(0,1,2,3....) | |
| 4502. |
Calculate no. Of bond pair and lone pair in IF5 molecule |
| Answer» I has total 7 valence electrons out of which 5 make sigma covalent bond with f and the remaining 2 electrons form lone pairs | |
| 4503. |
Law of definite proportions |
| Answer» Law of definite propertions: A chemical compound, no matter from which source it is obtained ,always contains the same elements combined together in the same definite propertion by mass.For example Water(of any source )\xa0is composed of two elements hydrogen and oxygen in the ratio 1:8 by mass.\xa0 | |
| 4504. |
Define ortho and para directing group and meta directing group in very short |
| Answer» Meta-1 no in cyclic compoundsOrtho-2 no in cyclic compoundsPara -opposite side in benzene | |
| 4505. |
What is peroxide effect in detail please help me as soon as possible |
| Answer» The change in regio selectivity of the addition of HBr to alkene in presence od peroxide is called peroxide effect. It is mainnly in anti markonikov rule.<br>Answer nahi de sakte to phir app kyu bana rakha hai | |
| 4506. |
State application of Hess law |
| Answer» If a reaction takes place in one step or several step then their enthaly change will remains constant.<br>It can be used to calculate Heat of reactionHeat of formation Heat of bond energy Resonance energy | |
| 4507. |
what are Aldehydes |
| Answer» It\'s a functional group<br>Aldehydes are organic compounds which have the functional group -CHO.An aldehyde is one of the classes of carbonyl group-containing alkyl group on one end and hydrogen on the other end. The R and Ar denote alkyl or aryl member respectively. In the condensed form, the aldehyde is written as –CHO. | |
| 4508. |
How I prepare all the chapters of chemistry class 11 within 10 days... Can anybody help me... |
| Answer» Go for imp laws<br>Read important topics and focus on your strength points | |
| 4509. |
What is molar entropy |
| Answer» Randomness in terms of mole<br>Entropy per mole | |
| 4510. |
Which is more stable cu or mg |
| Answer» Cu | |
| 4511. |
Hydrogen introduction |
| Answer» | |
| 4512. |
Convert acetylene to glyoxl |
| Answer» not glycol it is glyoxl<br>C2H2 on polymerization gives C6H6 which on ozonolysis gives 3mole glycol | |
| 4513. |
Black body radiation in hindi |
| Answer» | |
| 4514. |
c6h6+cl2 in presence of sunlight complete the following |
| Answer» It form benzene hexa chloride<br>lithium ion is smallest units group but move slowly in aqua solution as compared to the other alkali ions under the influence of an electric current give the reason | |
| 4515. |
Why powdered nickel is more effective than granular nickel |
| Answer» Powered nickel provide more surface than granular nickel | |
| 4516. |
What is thermochemical equation |
| Answer» It is the reaction in which the given reaction is in thermally as well as chemically equilibrium<br>That equation which has the physical speed of reactants and products with their energy change or enthalpy change | |
| 4517. |
What is collagative property |
| Answer» The properties of a dilute solutions which depend on no. Of solute particles and not on its quantity. | |
| 4518. |
IUPAC name of CH3-CH=CH-CH(COOH)-CH3 |
| Answer» It\'s 2-Methyl pent-3-en-1-oic acid<br>2-Methyl pent-3-en-1-oic acid | |
| 4519. |
Why so3 act an electrophil |
| Answer» | |
| 4520. |
Define threshold frequency of a metal |
| Answer» It is the minimum frequency used to emit electrons from surface of metal<br>The frequency above which photo electric effect is not observed<br>Threshold | |
| 4521. |
Discuss the condition for a process to be spontaneous in terms of entropy and gibbs free energy |
| Answer» When gibbs energy is +ve it is sponatous and when it is -ve it is non sponatous | |
| 4522. |
structural formula of 2 methyl 4 isopropyl heptane |
| Answer» | |
| 4523. |
Deferential orbit and orbitalSigma and PaiEnductive and electromeric |
| Answer» Orbit has 2d path and orbital has 3d path<br>Orbital is the path in which electrons move and orbital is the area where the probability of finding electrons is maximum<br>I don\'t know | |
| 4524. |
Define kp and kc between relationship |
| Answer» Kp =Kc(RT)^∆n<br>Hello sir | |
| 4525. |
Ehy Melody is so chocolatey |
| Answer» What nonsense | |
| 4526. |
What are imp topics in chapter 2nd of chemistry \'\' structures of atom\'\' |
| Answer» Dalton\'s theory,properties of cathode rays,jj Thomsons atomic model,Rutherford experimentn,,bhors atomic model,planks quantum theory,photoelectric effect (VMP) ,de brogle hypothesis,Heisenberg principle,drawbacks of bhors model,....,.,etc. | |
| 4527. |
Chemistry ki lab manual me salt analyas ko kese likhte hai |
| Answer» Reaction,result-character like odour,color etc.and the main cation or anion.<br>Jaise teacher likhaye?? | |
| 4528. |
Whai is limiting reagent |
| Answer» The reagent which get completely used in a reaction<br>The reactnat which get consumed and limit the amount of product formed called limiting reagent<br>The reactant which is present in lesser amount and get consumed in a chemical reaction and limiting the amount of products found is called limiting reagent<br>The substance in reactant side which gets consumed first due ro which reaction didn\'t proceeds further is termed as limiting reagent.?<br>Limiting reagent is a substance which is present in less amount in a chemical reaction.<br>Limiting reagent in a chemical reaction is the substance that is totally consumed when the chemical reaction is completed. The reaction cannot proceed without it as it becomes the limiting factor. | |
| 4529. |
Imp question cbse |
| Answer» | |
| 4530. |
Metal carbonate plus hydrogen gives ........ |
| Answer» Metal hydroxide<br>Google it | |
| 4531. |
Hendrosen equation. |
| Answer» | |
| 4532. |
Difference between e1 and e2 reaction |
| Answer» The one-step mechanism is known as the E2 reaction, and the two-step mechanism is known as the E1 reaction. The numbers refer not to the number of steps in the mechanism, but rather to the kinetics of the reaction: E2 is bimolecular (second-order) while E1 is unimolecular (first-order). | |
| 4533. |
Are these sample papers helpful for 11th examination? |
| Answer» Yes ,but not for jee | |
| 4534. |
Why co2 has more bond angle thenbf3 |
| Answer» Hlo neha baby<br>*has<br>CO2 has linear structure which makes the bond angle 180° while BF3 is trigonal planar which haa bond angle 120° | |
| 4535. |
The no of molecules of CO2 present in 44g of CO2 is |
| Answer» 44gram contain 1mole C. And 1mole =6.022×10to the power23 | |
| 4536. |
Pauli expansion |
| Answer» No two electrons in an atom have the same.set of four quantum number. | |
| 4537. |
What do you mean by sp3 halides |
| Answer» The term “sp3 hybridization” refers to the mixing character of one 2s-orbital and three 2p-orbitals to create four hybrid orbitals with similar characteristics. In order for an atom to be sp3 hybridized, it must have an s orbital and three p orbitals. | |
| 4538. |
Why antimarkonikov rule is applicable to HBr only and not HCl or HI? |
| Answer» Hcl has strong force of attraction bw them so it doesn\'t donate chlorine to attach to organic compound similarly Hl forms free radical where l instead of combing to organic compound it combines with another l to form iodine molecule | |
| 4539. |
Define aeromatisation reaction. |
| Answer» Aromatization is the conversion of a nonaromatic hydrocarbon to an aromatic hydrocarbon.There are four common methods of aromatization.1. Dehydrogenation of naphthenesNaphthenes are a class of cyclic aliphatic hydrocarbons obtained from petroleum. They have the general formula <mathjax>CnH2n</mathjax>. The simplest naphthene is cyclohexane, C₆H₁₂. Catalytic dehydrogenation converts it to benzene.C₆H₁₂ → C₆H₆ + 3H₂2. Dehydroisomerization of naphthenesMethylcyclopentane, C₆H₁₂, is catalytically isomerized and dehydrogenated to form benzene.C₅H₉CH₃ → C₆H₆ + 3H₂3. Dehydrocyclization of aliphatic hydrocarbonsHeptane is catalytically converted to toluene.C₇H₁₆ → C₆H₅CH₃ + 4H₂Small amounts of platinum on acidified alumina accomplish reactions (1), (2), and (3) readily.4. Condensation of hydrocarbonsPropane is catalytically converted to benzene during the cracking of petroleum at 600-800 °C.3C₃H₈ → C₆H₆ + 3CH₄ + 3H₂ | |
| 4540. |
How many neutrons and protons are there in the following nuclei ? |
| Answer» We know atomic number(z) = no of protons = no of electronsAlso mass number(A) = no of protons + no of neutrons136C:Here mass number = 13Atomic number = Number of protons = 6Number of neutrons = (mass number) – (Atomic number)= 13 – 6 = 78O16:Here mass number = 16Atomic number = 8 Number of protons = 8 Number of neutrons = (mass number) – (Atomic number)= 16 – 8 = 812Mg24:Here Mass number = 24Atomic number = Number of protons = 12Number of neutrons = (mass number) – (Atomic number)= 24 – 12 = 1226Fe56:Here mass number = 56Atomic number = Number of protons = 26Number of neutrons = (mass number ) – (Atomic number)= 56 – 26 = 3038Sr88:Here mass number = 88Atomic number = Number of protons = 38Number of neutrons = (mass number) – (Atomic number)= 88 – 38 = 50 | |
| 4541. |
Convert the following benzene diazonium chloride into Iodobenzene |
| Answer» | |
| 4542. |
What are Silicones |
| Answer» A silicone or polysiloxane is any of a number of polymers that include any synthetic compound made up of repeating units of siloxane, which is a chain of alternating silicon atoms and oxygen atoms, combined with carbon, hydrogen, and sometimes other elements. | |
| 4543. |
Explain pauli exclusion |
| Answer» Pauli’s exclusion PrincipleAccording to it: “no two electrons can have the same set of all four quantum numbers.”Or, it states that an orbital can have maximum of two electrons and that must be of opposite spin. Due to this, it was concluded that an orbital can have maximum of two electrons which can have all 3-quantum number same but the spin will be definitely different. | |
| 4544. |
The orbitals which have same no. of nodes are |
| Answer» 1s, 2p, 3d, 4f | |
| 4545. |
Determine the solibility of Ag2cro4 and ksp KspOf Agcro4 is 1.1×10^-12 |
| Answer» | |
| 4546. |
Determine the solubility of silver chromate, Ksp of Ag2Cro4 1.1×10-12 |
| Answer» Answer | |
| 4547. |
Checking the bacterial contamination in drinking water by sulphide ions |
| Answer» The Sulphide ion test is the most common test that is used for checking any bacterial contamination in drinking water. Since even a small concentration of sulphide ion (0.01 mg/L) in the water makes it unfit for culture and consumption, it is important to check and test the presence of sulphide ion because it is very poisonous.The simple and most common sulphide test is as follows:-The water which has to be tested is filled in a test tube and a strip of H₂S is placed inside the tube. This test tube is then incubated for up to 14 - 16 hours at a temperature of 35°C. In case the strip turns into black, it indicates the presence of sulphide ion in the water and therefore, it is considered unsafe and unfit for consumption.<br>Checking the bacterial in drinking water by sulphide ions | |
| 4548. |
Scheme of salt analysis |
| Answer» Hlw | |
| 4549. |
Why C H bonds in methane are identical? |
| Answer» Since the elements that is C and H are same on all sides and so even the forces among them will be identical so the bonds are same...Also since methane doesn\'t harm the centeral metal by stearic hindrance or any other factor so they are perfectly same | |
| 4550. |
Electrophile |
| Answer» Electron loving❤️ species<br>Love for the electrons called electrophile .it contain +ve charge on it. | |