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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.
| 2801. |
write SI unit of luminous intensity & temperature? ??? |
| Answer» Candela cd<br>he\xa0SI unit of luminous intensity\xa0is\xa0Candela and temperature\xa0is Kelvin. | |
| 2802. |
Pls anyone tell answer to this question pls emergency |
| Answer» Where is the question | |
| 2803. |
Explain Indective effect? |
| Answer» Inductive effect\xa0is an\xa0effect\xa0in which permanent polarization arises due to partial isplacement of sigma e- along carbon chain or partial displacement of sigma-bonded electron toward more electronegative atom in carbon chain i.e. Magnitude of partial positive charge:\xa0Inductive effect\xa0is a permanent\xa0effect. | |
| 2804. |
What is the difference between the sigma Bond and pi bond |
| Answer» \tSigma BondPi BondDuring sigma bond formation overlapping orbitals can either be one hybrid orbital and a single pure orbital, or two pure orbitals and two hybrid orbitals.During pi bond formation overlapping orbitals must be two unhybridized orbitals.Sigma bonds are known to exist independently and allow free rotation.Pi-bonds must always exist along with sigma bond and the rotation is restricted.Sigma bonds are stronger bonds.Pi bonds are usually less powerful compared to sigma bonds.Sigma bonds are formed first when atoms interact.Pi bonds between two atoms are formed after sigma bonds are formed between them.During the bonding between two given atoms, \xa0Only one sigma bond is formed.Here two pi bonds can exist between two atoms.Sigma bonds are known to have cylindrical charge symmetry around the axis of the bond.No symmetry exists in pi bonds.\t | |
| 2805. |
Calculate the mass of 0.5 mole of co2 |
| Answer» 0.5 = mass/ molar mass 0.5 × molar mass = mass 0.5 × 44= massMass = 22 g<br>It is quite simple.U know wellNo of mole is = given weight divided by molecular weightU hv to calculate mass.and u know mole well and molecular mass of CO2 which is 44g/mol So mass becomes22g | |
| 2806. |
Oxidation number method of balancing chemical reactions |
| Answer» | |
| 2807. |
The quantum numbers n, l, ml for the orbital 4d xy |
| Answer» 4d : N = 4 , l = 2, | |
| 2808. |
Why chromium lose 1st e from 4s instead of 3d...?? |
| Answer» Because half filled shells are more stable than another one<br>4s² $$\\boxed{↑\\↓}$$ 3d⁴ $$\\boxed{↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\}$$ hear 4s is full filled so it is stable but 3d is not stable<hr>4s¹ $$\\boxed{↑\\ }$$ 3d⁵ $$\\boxed{↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\|↑\\ \\}$$ hear both 4s & 3d are more stable <hr><hr><br>wait, are you sure you areDeepak Singh ?<br>Yeah see the energy order of subshells<br>Bcoz it\'s more stable for them to have half-filled D-subshells ? | |
| 2809. |
What is ionization potential? |
| Answer» Ionisation\xa0enthalpy is also known as\xa0ionisation potential\xa0since it is the minimum\xa0potential\xa0difference required to remove the most loosely bound electrons from an isolated gaseous cation.The\xa0energies\xa0required to knock out second and third electrons are called second and third\xa0ionisation energies.<br>अपने ऑर्बिट से electron ko hatane me kitna energy chahiye for infinite orbit tak then, uus energy ko ionisation potential karate hai<br>The amount of energy required to remove most loosely bounded electrons<br>Don\'t know | |
| 2810. |
Inert pair effect? |
| Answer» The\xa0inert pair effect\xa0is the tendency of the two electrons in the outermost atomic s-orbital to remain unshared in compounds of post-transition metals.\xa0The\xa0inert pair effect\xa0explains why common ions of Pb are Pb4+\xa0and Pb2+, and not just Pb4+\xa0as we might expect from the octet rule.\xa0Screening effect\xa0: The\xa0shielding effect\xa0describes the balance between the pull of electrons on valence electrons and the repulsion forces from inner electrons. | |
| 2811. |
Ionic bond?? |
| Answer» It is a Columbic Force of attraction between oppositly charged ion which are formed by loss and gain electron<br>??? | |
| 2812. |
Avogadro\'s hypothesis? |
| Answer» Avogadro\'s law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules" ▤=▥=▦=▧=▨=▩ | |
| 2813. |
Enthalpy? |
| Answer» Enthalpy change of a system is equal to the heat absorbed or evolved by the system at constant pressure. As most of the reactions are carried out at constant pressure ,the measured value of the heat evolved or absorbed is the enthalpy change enthalpy. | |
| 2814. |
How to draw the hybridization diagram,,? |
| Answer» 4s $$\\boxed{↑\\↓}$$ 3d $$\\{↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\}$$ 4s $$\\boxed{↑\\↓}$$ 3d $$\\↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\$$<br>4s $$\\boxed{↑\\↓}$$ 3d $$\\boxed{↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\}$$ 4s $$\\boxed{↑↓}$$ 3d $$\\boxed{↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\}$$<br>4s $$\\boxed{↑\\↓}$$ 3d $$\\boxed{↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\}$$ 4s $$\\boxed{↑\\↓}$$ 3d $$↑\\ \\|\\↑\\ \\|\\ ↑\\ \\|\\↑\\ \\| \\ \\$$ | |
| 2815. |
Hybridization?? |
| Answer» Intermixing of different level of energy of orbital is known as HYBRIDIZATION seeing you after a long time , where was you??<br>We know orbitals of last shell overlap with each other. The overlapping is of two types:\tHead to head(sigma bond)\tSidewise(pi bond)Overlapping of orbitals takes place between which has same energy. If in case, the orbitals have different energy they can’t overlap.\xa0Hybridization\xa0is the intermixing of orbitals of slightly different energies, so as to redistribute their energy and give rise to new set of orbitals that are similar in shapes and energy.<br>Intwr mixing of orbitals to firm bonding orbitala | |
| 2816. |
Lewis dot structure of carbon monoxide?? |
| Answer» Mai vdiya hu.. But padhai n likhai nhi hai ???aap btao??<br>Lewis dot structures reflect the electronic structures of the elements, including how the electrons are paired. Lewis structures are a useful way to summarize certain information about bonding and may be thought of as “electron bookkeeping”. In Lewis dot structures each dot represents an electron. A pair of dots between chemical symbols for atoms represents a bond.Lewis Structure of CO (Carbon Monoxide)\tA carbon monoxide molecule consists of one carbon atom and one oxygen atom.\tThe\xa0carbon atom requires four electrons to obtain octet configuration whereas the oxygen atom requires two.\tTherefore, the valency is satisfied via the donation of a lone pair of electrons for bonding by the oxygen atom.\tThe resulting Lewis electron dot structure displays a\xa0triple bond\xa0connecting a carbon and an oxygen atom, each holding a lone pair of electrons.\t\xa0<br>Hi goog morning | |
| 2817. |
explain the hydrogen spectrum on the basis of Bohr\'s atomic theory |
| Answer» According to Bohr,\tWhen energy is supplied to atoms of hydrogen, the electron from lower energy gets excited to higher energy level.\tThe excited state being unstable, it jumps back to its original state that is ground state.\tSome electrons move to their ground state in one jump, some in multiple jumps. Each jump corresponds to line in a spectrum.\tAs we know the gas in tube consists of many hydrogen atoms.\tTherefore, each electron on getting energy gets excited.\tOn returning to the ground state, they either move in single jump or multiple jump.\tThis is the reason that we get so many lines in different regions in hydrogen spectrum.The wavelength emitted by them can be calculated as: | |
| 2818. |
What is pi bond? ????? |
| Answer» The bond formed by the sidewise or lateral overlapping of atomic orbitals of valence shell, such type of bond is called as pi bond<br>Pi bond is also known as sideways overlap..From name it is clear that it is formed by sideways overlapping of orbitals..It is usually weaker than sigma bond..And one more thing to note..Pi bond can\'t be formed by s orbitals..ie. s orbitals always form a sigma bond..Hope it would help..??<br>The bond formed by the sidewise or lateral overlapping of atomic orbitals of valence shell, such type of bond is called as pi bond<br>https://www.tenor.co/bfIla.gif | |
| 2819. |
Why 11, 12 is diffucult ? |
| Answer» No, it\'s depend on us how we take it !!<br>It\'s a unique class that we never meet in futhure..<br>I don\'t think so class 11 and 12 is difficult... | |
| 2820. |
ashtak Niyam kya hai |
| Answer» | |
| 2821. |
Explain structure of co3²- ion in terms of resonance |
| Answer» | |
| 2822. |
Percentage composition |
| Answer» Mass of an element /total mass of compound *100 | |
| 2823. |
Why O has lower ionization enthalpy than N and F ? |
| Answer» oxygen has outer electronic configuration2s2\xa02p4removal of ine electron from the 2p subshell will make its configuration2s22p3thus it attains a half filled configurationthus lesser energy is required to remove an elecron from oxygenwhereas in nitrogenthe electronic configuration is2s2\xa02p3it has a stable half filled configurationand thus more energy is required to remove an electron from nitrogenin case of flourinethe electronic configuration is2s2\xa02p5it has to gain one more electron to attain noble gas configuration and become stablethus more energy is required to remove an electron from flourinethus ionisation enthalpy of oxygen is lesser than nitrogen or flourine | |
| 2824. |
Iupac name of C11H25 |
| Answer» | |
| 2825. |
Whai is equation of hydrolysis? |
| Answer» | |
| 2826. |
Electronic configuration?? |
| Answer» | |
| 2827. |
What is degree of hydrolysis?? |
| Answer» It is defined as the fraction (or percentage) of the total salt which is hydrolysed at equilibrium. For example, if 90% of a salt solution is hydrolysed, its degree of hydrolysis is 0.90 or as 90%. It is generally represented by ‘’.Salts of strong acids and strong bases do not undergo hydrolysis (they undergo only ionization) hence the resulting aqueous solution is neutral. | |
| 2828. |
All factors of electronic gain enthalpy and Ionization enthalpy |
| Answer» Azra aap kon s school s ho<br>With reasons<br>Electron gain enthalpy\xa0of an element is the energy released when a neutral isolated gaseous atom accepts an extra electron to form the gaseous\xa0negative Ion\xa0i.e. anion. We can denote it by Δ\xa0egH. Greater the amount of energy released in the above\xa0process, higher is the electron gain enthalpy of the element.\tEnergy\xa0is released when an electron is added to the atom. Therefore, the electron gain enthalpy is\xa0negative.\tThe\xa0electron gain enthalpy for halogens is highly negative\xa0because they can acquire the nearest stable noble gas configuration by accepting an extra electron.\tNoble gases have large positive electron gain enthalpy. This is because the extra electron is placed in the next higher principal quantum energy levels. Thus, a highly unstable\xa0electronic configuration\xa0is produced.<br>Atomic radius , nuclear charge , half/full filled , etc | |
| 2829. |
Explain : Hydrogen Bond |
| Answer» The force of attraction existing between hydrogen atom which is attached to highly electronegative atom in a covalent molecule and more electronegative atom of another covalent molecule is called hydrogen bonding.Hydrogen bond is possible mostly in polar covalent molecules where partial charge separation is there.As this bond existed between partial charges, it is considered to be weak bond than ionic and covalent bonds.Ex: Hydrogen bond present in HF molecule. | |
| 2830. |
1s , 2s , 2p , 3s , 3p , 3d , 4s , 4p , 4d , 5s Arrange them in increasing order of energy. . ⚡ |
| Answer» n+l→ 1,2,3,3,4,5,4,5,6,5 1s<2s<2p<3s<3p<4s<3d<4p<5s<4d Consept:Find n+l, if two (n+l) become same then choose the orbital whose \'n\' is lowest to find the lower energy orbital, That\'s all ....<br>1s> 2s >2p> 3s >3p >4s >3d >4p> 5s >4d> 5p > 6s >4f >5d >6p> 7s> 5f >6d >7pYe h pura increasing order me<br>3p tk same hai , fir 4s, 3d , 4p, 5s, 4d | |
| 2831. |
Should earth be regarded as a wave in the light of De Broglie equation. Explain |
| Answer» No , its mass is very large so deviatione are negligible | |
| 2832. |
Important question of ch 3 topic :- valence bond theory, mot, hydrogen bonding ... |
| Answer» ................................................................................................................................................<br>... | |
| 2833. |
Who named the term electron after the discharge tube experiment |
| Answer» In 1878 William Crooks carried out discharge tube experiments and discovered new radiations and called them cathode rays. Since these rays travel from the cathode towards anode. Later, J.J Thomson studied the characteristics of cathode rays and concluded that cathode rays are negatively charged particles, now called electrons. The name electron was given by Johnson Stoney. | |
| 2834. |
The Maximum number of electron in k19 atom with quantam number n=3 ml=+_1 s=+_1/2 |
| Answer» Maximum number of electrons are 1 | |
| 2835. |
Find the mass of CO2 Produced When 5.8 g of Butane brunt |
| Answer» Hello<br>Hii | |
| 2836. |
Which orbital notation does not have spherical node?A)n=2;l=0B)n=2;l=1C)n=3;l=0D)n=1;l=0 |
| Answer» | |
| 2837. |
Which of the following substances has the highest melting point?A)NaClB)KClC)MgOD)BaO |
| Answer» MgO has a high melting point because of the difference in lattice energy.They all have the same FCC lattice structure, but the lattice energy of MgO is roughly 4 times that NaCl and KCl because it is proportional to Z+.Z- Since lattice energy is disproportional to this distance, that could be why the lattice energy of MgO is larger than that of BaO. | |
| 2838. |
Who give dobber\'s traid |
| Answer» Johann Wolfgang Döbereiner haves dobber\'s traids | |
| 2839. |
Explain why the bond order of N2 is greather than N2+ but the bond order of O2 is less than of O2+ |
| Answer» | |
| 2840. |
What is Stereochemistry |
| Answer» *Stereochemistry* is the study of how molecules are affected by the way their atoms are arranged in space. It is also known as 3D chemistry as the word stereo means three dimensional. Using stereochemistry, chemists can work out the relationships between different molecules that are made up from the same atoms<br>Stereochemistry is the systematic presentation of a specific field of science and technology traditionally requires a short preliminary excursion into history. Stereochemistry is the\xa0‘chemistry of space ‘,\xa0that is stereochemistry deals with the spatial arrangements of atoms and groups in a molecule.<br>Calculation of masses/volume of a chemical reaction<br>The word stereo means chemistry of 3 dimensional structure or space .study of these chemistry is known as stereochemistry. | |
| 2841. |
What is buffer solution?? |
| Answer» namaskar bhai log... pahchane... kaise ho dono....<br>Good evening bhai....haa thik hi hai....hope you too...?<br>Buffer solutionThey are those solutions which has a constant value of pH , no matter what we add in to them .Example: The pH of Blood is 7.4-7.6. Blood act as a buffer. As u all know, in spite of eating so many types of food items, the pH of blood remains same.The buffer solution is defined as:\xa0A solution which resists the change in hydrogen ion concentration on addition of a small amount of acid or a base in to it.<br>A solution that only changes slightly when an acid or a base is added to it. For an acid -buffer solution, it consists of a week acid and it\'s conjugate base . For a base buffer solution,it consists of a week base and it\'s conjugate acid. ?? | |
| 2842. |
explain with the help of suitable example polar covalent bond |
| Answer» A polar covalent bond exists when atoms with different electronegativities share electrons in a covalent bond. Consider the hydrogen chloride (HCl) molecule. Each atom in HCl requires one more electron to form an inert gas electron configuration.<br>Aatmanirbhar??<br>polar covalent bonding is a type of chemical bond where a pair of electrons are unequally shared between two atoms. The bonding of hydrogen and chlorine atom leans more tiwards cl atom because cl is more elecronegative in nature than the hydrogen. | |
| 2843. |
Define hydrogen bonding |
| Answer» Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces.<br>Hydrogen bonding refers to the formation of Hydrogen bonds, which are a special class of attractive intermolecular forces that arise due to the dipole-dipole interaction between a hydrogen atom that is bonded to a highly electronegative atom and another highly electronegative atom while lies in the vicinity of the hydrogen atom. For example, in water molecules (H2O), hydrogen is covalently bonded to the more electronegative oxygen atom. Therefore, hydrogen bonding arises in water molecules due to the dipole-dipole interactions between the hydrogen atom of one water molecule and the oxygen atom of another H2O molecule.<br>View allDescriptionHydrogen bonding, interaction involving a\xa0hydrogen\xa0atom located between a pair of other atoms having a high affinity for electrons; such a\xa0bond\xa0is weaker than an ionic\xa0bond\xa0or covalent\xa0bond\xa0but stronger than van der Waals forces | |
| 2844. |
Oxyge has lower than folurin explain why? |
| Answer» | |
| 2845. |
Gm everyone ??? |
| Answer» F9..<br>Hru both ad ur names<br>Yup<br>Good Night ??<br>Sorry gn | |
| 2846. |
What is reaction ? |
| Answer» Thanks deepak....<br>A reaction is a chemical process in which substance act on each other and make a new substance (compound) :)<br>Good thought? I know everything<br>Maine to soach liya firr iss app pe Kabhi nhi aaungi... Lekin mai kisi Aur ke vajah se app kyu chodu. ....un jaise logo ko chodkar chahiye Ye app...<br>Yeah legendary you are right.I was really scared at that time kyunki mujhse kisi me inte batameeze se baat nhi ke thi usse pehle but time changes everything thing now I am here again. But who are you ?how do you know me ? | |
| 2847. |
Define Chemistry. |
| Answer» chemistry is the science of atoms, molecules, and their \'transformation\'.<br>Chemistry is the branch of science which deals with the study of matter it\'s chemical composition, the physical and the chemical change which undergoes and the energy change which accompany these process. | |
| 2848. |
5.3g of na2co3 is dissolved in 90 g of water what will be mole fraction of na2co3 and water |
| Answer» Heyy!!!!!!! | |
| 2849. |
Which of the following is indicate the correct representation of repulsive force |
| Answer» Pta na chl nikal # emiway bantai | |
| 2850. |
How we can send pictures, images, stickers on this site? |
| Answer» Sry dude....I can\'t tell u coz some users may misuse it....?<br>Don\'t know | |