InterviewSolution
Saved Bookmarks
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.
| 1. |
The weight of one molecule of compound C60H122 is |
| Answer» 180g atomic mass 180×30÷100 = 54gm | |
| 2. |
Le |
| Answer» | |
| 3. |
Some important compounds of sodium, notes |
| Answer» The most important compounds of sodium that are of commercial importance are as follows-Sodium Carbonate\tIt is commonly known as Washing Soda with molecular formula Na2CO3.10H2O.\tIt is synthesized by Solvay process. During this process, sodium carbonate is synthesized using sodium chloride and calcium carbonate. Sodium Chloride (NaCl)\t\tThe main source of sodium chloride is sea water.\t\t\tEvaporation of sea water is the most common method to obtain sodium chloride.\t\t\tCrude sodium chloride is obtained by crystallization of brine solution, containing sodium sulphate, calcium sulphate, calcium chloride and magnesium chloride\tSodium Hydroxide (NaOH)\t\tAlso known as Caustic Soda.\t\t\tThe process of formation of sodium hydroxide is known as Castner-Kellner Cell.\xa0\tSodium Hydrogen Carbonate\t\tIt is also known as Baking Soda with a molecular formula, NaHCO3.\t\t\tIts decomposition forms carbon-dioxide.\t | |
| 4. |
find the position of Zn30 in periodic table |
| Answer» Transition metals | |
| 5. |
How to solve ion electron method |
| Answer» this is very easy method you can follow these steps clearly you can learn very easily and fastly . so lets start firstly you can separated the oxidation and reduction reactions .now you can add h2o and h+ if acidic medium otherwise you can add h20 and oh- if basic medium . now you can balanced the atoms next you can balance the ions .now you can add both the eq . of oxidation and reduction reaction .now it is completed . you try these steps clearly and you can try minimum 5 questions you can solve it easily .<br>Very easy to solve | |
| 6. |
Calculate the amount of water produced by the combustion of 16 g of methane |
| Answer» Wants more nice explanation<br>CH4 (g)+2O2 (g)————-> CO2 (g) +2H2O (g)Now, according to the reaction 1 mole of CH4 gives 2 moles of H2OAnd 16 grams of Methane mean 1 mole as its Molecular mass of methane is 16.so 1 mole of methane = 16/16 (given mass 16 and molecular mass 16)since 1 mole of methane is getting used up to form 2 moles of water.number of moles=given mass/molecular mass ——- eq. 1molecular mass of water is 18.2=x/18 ( where x is the mass of water produced , using equation 1)2*18=36gramsso 36 grams of water will be produced | |
| 7. |
Some MCQ between chapter 1and2 |
| Answer» | |
| 8. |
Define reciprocal proportion |
| Answer» It states that when two elements individually combine with a third element in some ratio to form two different compounds. Then the ratio in which they combine with each other will be a whole no. Multiple of the ratio of individual combination with 3rd element. | |
| 9. |
What is the spectrum of hydrogen???? |
| Answer» The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. | |
| 10. |
I am not able to understand ch4 piz help me |
| Answer» | |
| 11. |
Why c2 doeant exist? |
| Answer» Can i get some more reasons<br>Because carbon is tetravalent and it is energetically not favourable to gain or lose 4 electrons at a time.. That\'s why C2 doesn\'t exist.... | |
| 12. |
What is line spectra or atomic spectra?? |
| Answer» Atomic Spectra:\tWhen an electron jumps amongst energy levels in an atom, energy is emitted or absorbed in the form of electromagnetic radiations and these radiations produce a spectral lines of frequencies(or wavelength) associated with an atom, called atomic spectra\tSpectroscopy is the learning and examination emission and absorption spectra associated with an atom to determine its properties\tSpectral lines are the bright and dark line series that constitute the spectrum associated with an atom | |
| 13. |
delta E=0 THEN FIRST LAW OF THERMODYNAMIC WILL CHANGE |
| Answer» | |
| 14. |
What is solubility and solubility product |
| Answer» A substance\'s solubility product, Ksp, is the mathematical product of its dissolved ion concentrations with each concentration\xa0raised to the power of their stoichiometric coefficients.\xa0For example the solubility product of ionic compound Ag2S isKsp =[Ag+]2[S-2] | |
| 15. |
Test for nitrogen |
| Answer» Lassaigne\'s test is used to detect the presence of Nitrogen . | |
| 16. |
Wht is hyberdation |
| Answer» intermixing of orbital is known as hybridization<br>Hybridization is defined as the mixing of the atomic orbitals belonging to the same atom but having slightly different energies so that a redistribution of energy takes place between them resulting in the formation of new orbitals of equal energies and identical shapes. The new orbitals thus formed are known as hybrid orbitals.<br>The process of mixing of atomic orbitals to form new hybrid orbitals called hybridisation. OK YAAR IT\'S VERY EASY DEFINITION | |
| 17. |
Superoctet molecule is?a)CIF3b)NH3c)PCl3d)CO2 |
| Answer» | |
| 18. |
What is the resonance hybrid representing of HCLO3 |
| Answer» | |
| 19. |
What is the definition of covalency and how to find it |
| Answer» Covalency is the number of electrons an element shares.<br>Firstly , draw the Lewis structure of the molecule and then count the number of shared pairs of elecrons . Hence, by counting the number of bonds formed by the element you can calculate the covalency of that element . | |
| 20. |
What are adiabatic processs???????? |
| Answer» In which q=0,i.e., there is no exchange of heat..<br>dq=0 | |
| 21. |
Value of R in pv=nrt |
| Answer» R is universal gas constantR=8.314joule per kg per mole | |
| 22. |
Calculate mass of photon wavelength is 3.6x10A\' |
| Answer» | |
| 23. |
Write the ec of the following anions find out how many unfire electron is there iron 2 positive |
| Answer» | |
| 24. |
How to use stochiometric calculation explain briefly |
| Answer» Stoichiometric Calculations are mostly based on chemical formulas.\tFormula Mass: It is defined as the sum of the atomic weights of the each atom present in the molecule of the substance. For example formula mass of Na2S is calculated as 2(23) + 1(32) = 78\tAvogadro number: Avogadro’s number is defined as the number of particles present in one mole of substance. It is defined as a number of atoms present in exactly 12g of C-12.Avogadro number is valued as 022× 1023\xa0\tMolar Mass: It is defined as the sum of the total mass of all the atoms that make up a molecule per mole. | |
| 25. |
Hybridisation of C2H2? |
| Answer» \tWhen one s and one p orbital belonging to the same main shell of an atom mix together to form two new equivalent orbitals, the type of hybridization is called sp hybridization. The new orbitals formed are called sp hybrid orbitals.\tThey are collinear with an angle of 1800.\tEach of the hybrid orbitals formed has 50% s-character and 50% p-character.\tThe remaining two p-orbitals which do not participate in hybridization remain as such.\tIf these are half-filled, they may form bonds with other atoms having half-filled atomic orbitals.\xa0\xa0Thus, sp- hybridization arises when one s and one p orbital combine to form two sp-orbital with 180° bond angle and linear shape to the molecule. The percentage of s and p are 50 %. Example: C2H2\xa0(acetylene or ethyne). | |
| 26. |
Zn+cons H2SO4-----A+B+C |
| Answer» ZnO + H2O +SO2 | |
| 27. |
What is quantum theory with example? |
| Answer» A group of numerical values which provide solutions that are acceptable by the Schrodinger wave equation for hydrogen atoms.For example , ncert physics book pg no. - 53 problem 2.17 and 2.18 . | |
| 28. |
What is the ratio of molecules |
| Answer» | |
| 29. |
Which of the following property of matter is not quantitative in nature |
| Answer» I think question complete nahi....pura question To type karo..... | |
| 30. |
Which has greater dipole moment |
| Answer» larger the difference in electronegativities of bonded atoms, larger the dipole moment. As a example, NaCl has the highest dipole moment because it has an ionic bond. | |
| 31. |
Please explain heisenberg\'s principles |
| Answer» The heisenberg\'s principle says that it is impossible to determine at any given instant, simulteneously both the position and momentum of subatomic particles like electrons with accuracy/certainity.<br>According to hisenberg\'s principle it is impossible to know the position and momentum of atom simultaneously. | |
| 32. |
Why is the electron affinity of F and O less than it\'s immediate lower member? |
| Answer» | |
| 33. |
What is Heisenberg\'s Uncertainty Principle ? |
| Answer» Donot go on directly the defination . see, electron is so small and if we want to get image of it we need light of wave length which is smaller than diameter of electron. so, light will have higher energy when it strikes electron and we will get the place where electron was but it will change velocity. When velocity changes momentum changes so heisenberg says that we cannot caculate velocity and momentum together<br>It states that it is impossible to determine simultaneously, the exact position and exact momentum ( or velocity) of an electone (with accuracy) mathematically. | |
| 34. |
Define polar and non polar covalent bond ? |
| Answer» Polar covalent bond is a bond in which the different element of an atom is present and sharing of electron but in nonpolar covalent bond the same type of element of an atom is present and mutual sharing of electrons like NH4, CH4 and in polar example like NaCl H2 s o4 etc<br>Check on ncert | |
| 35. |
What is valence bond theory ? |
| Answer» According to Valence bond theory , covalent bond formation between the atoms when they have half-filled valence atomic orbitals, each containing a single unpaired electron.<br>By this theory a covalent bond is formed between two atom by the overlapping of half filled valence atomic orbital.. | |
| 36. |
Calculate the no. of molecules in 1ml of Co2 at NTP . |
| Answer» Co2=molecular mass =12+16x2=44gNo of molecule =44x6.022x10²³=264.968x10²³Scientific notation =2.64x10²³+² | |
| 37. |
What is Rutherford atomic model? |
| Answer» Kaha ho aditi plzzzzz thumhe mera kasam plzz aao naaaaaaaaa plzzzz sister<br>Kaha ho plzzzzzz aaoo naaaaaa<br>Kaha ho aditi plzzzz aao jao naaaaaaaaa plzzzzzzzzzz<br>One of alpha rays come back in 20,000 rays<br>Most of alpha particle follow linea direction..<br>Okkkkkkkkk<br>Nooo...<br>Obey kya re kya kr rhe ho anhh samajh me ni aata hai<br>I Don\'t know...plzz & harsh from yesterday u r Commenting on my every comment plzz stop<br>Aditi ~ AngelI\'m Fine but not fullyNobody in this world is fully fine.........miss, so how could you be differ.......<br>Kb tak thik ho gaogi tum....<br>I\'m Fine but not fully<br>Thanks Brother ?<br>In this experiment Rutherford used the radioactive element that element is radium and the radioactive element radium put in lead box<br>Kaise ho sister<br>Two detailed study about the structure of an atom Rutherford carried out an experiment by the passing of alpha rays on very thin gold foil and give atomic model which was called Rutherford atomic model | |
| 38. |
What is the importance of heisenberg\'s uncertainty principle |
| Answer» This principle explains about non existence of free electrons in nucleus , strength of nuclear forces , ground state energy of H atom , radius of Bohr\'s orbit.This principle deals with only microscopic particles and hardly useful in everyday life. | |
| 39. |
Electronic configuration how much should we learn ? |
| Answer» You should learn the exceptions properly and learn the one which are frequently asked in exams . That\'s enough and keep others in mind .<br>We just need practice .There is nothing in learning or craming<br>Hi<br>Pata nahi hai | |
| 40. |
How to insert questions here from gallery? |
| Answer» | |
| 41. |
What is the formal charge of oxygen and sulphur in H2SO4? |
| Answer» Formal charge is defined as the charge assigned to an atom of a molecule.In , sulfur is the central atom. Therefore, formula to calculate the formal charge will be as follows. Formal charge = Valence electrons - Valence electrons in sulfur are 6 and lone pairs on sulfur are zero. Number of bonded electrons of sulfur are 8.Therefore, formal charge on sulfur atom will be calculated as follows. Formal charge = Valence electrons - = 6 - = 6 - 4 = 2Thus, we can conclude that the formal charge on sulfur in is +2. | |
| 42. |
poul exclusive law |
| Answer» According to pauli exclusive principle , only two electrons may exist in the same orbital and these electrons must have opposite spin .<br>Yes<br>Are u mean by pauli\'s exclusion principal | |
| 43. |
What is crystal lattice ? Explain |
| Answer» A regular three-dimensional arrangement of constituent particles in a crystal in which each particle is represented by a point\xa0is called crystal lattice.<br>Crystal Lattices\xa0\tCrystalline solids have a regular and periodically repeating pattern of constituent particles.\tThe diagrammatical representation of three dimensional arrangements of constituent particles of a crystal in space with each particle depicted as a point is called\xa0crystal lattice.\tThere are only 14 possible three dimensional lattices and are known\xa0Bravais Lattices.\tEach point in a lattice is called lattice point or lattice site.\tEach point in a crystal lattice signifies one constituent particle which can be an atom, a molecule or an ion.\tLattice points are joined together using straight lines to identify the geometry of the lattice. | |
| 44. |
What is heisenberg uncertainty principle¿ |
| Answer» It is not possible to simultaneously both the position and momentum (velocity) of a microscopic particle with absolute accuracy.<br>Heisenberg uncertainty principle is defined as It is impossible to determine simultaneously the exact position and exact momentum of an eletron . | |
| 45. |
The number of water molecules in one litre water |
| Answer» Since 1L = 10^-3 mL = 10^-3 g H2O find mole then molecules by multiplying with Avagadro\'s no<br>=5.5×10^-5×6.022×10^23 molecules=3.3×10^19 molecules<br>6.022*10^23 | |
| 46. |
How do elements get mixed up |
| Answer» To increase melting point. And after mixed up | |
| 47. |
How to get debroglie wavelength |
| Answer» Let z be the wavelength of electron then z = h/mu here h is planck\'s constant ,m is mass and u is speed of electron | |
| 48. |
Which sub shell is non direction and why |
| Answer» Thanks<br>"S" subshell is non -directional because it is spherical in shape and due to this extent of overlapping is less in case of S orbital. | |
| 49. |
Who discovered electron |
| Answer» Jj thomson<br>J.JThomson discovered the Electron<br>JJ thomson aur meri nani<br>Jj Thompson<br>J.J thomson | |
| 50. |
Plzz explain the que no. 29 of chapter 1 ( some basic concepts of chemistry |
| Answer» But it is quite harder to understand.....if u know any other trick to solve it...then plz tell bout it<br>Is it not explained on this app? | |