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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How does the Albert einstein\'s theory explins the particles nature of matter |
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| 2. |
Chemistry model please |
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| 3. |
Can you give step wise explanation of the discovery of electrons plz |
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Answer» Electron was descovered by jj thomson by expriement with discharge tube. When thomson put positively charge substance on one side of discharge tube he saw that particle from cathod ray bend towards that positively charge substance. From this he came to know that particle from cathod ray contain negatively charge particles and called them as electron Plz answer at the soonest |
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| 4. |
If NA is avogadro `s number then number of valency electron in 4.2 g of nitride ions (N3-) |
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| 5. |
What do you mean by election spin quantum number |
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Answer» And it\'s value is +1/2 or -1/2 The Spin Quantum Number (ms) describes the angular momentum of an electron. An electron spins around an axis and has both angular momentum and orbital angular momentum. |
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| 6. |
Calculate the atom present 4.68 g of o^2 |
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| 7. |
What is the molecular formula of ethylene ? |
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Answer» 28 C2H4 |
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| 8. |
Illustrate Avogadro\'s law with an example. |
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Answer» Volume of gas is directly propotional to the number of molecules. Like eg, 100 ml of methane has y molecules.50 ml of methane has y/2 molecules. 200 ml of methane has 2y molecules. These eg illustrate avogadro\'s law. Avogadro proposed that the equal volumes of all gases at the same temp. and pressure should contain equal no. of molecules |
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| 9. |
Calculate the percentage composition of carbon,hydrogen,oxygen in glucose c6H12o6 |
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| 10. |
Why fully filled and half filled orbitals are more stable |
| Answer» The half-filled and fully-filled orbitals are more symmetrical than any other configuration and symmetry leads to greater stability. | |
| 11. |
How much sulfuric acid can be obtained from 5 kg of pure sulphur S8 |
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| 12. |
Hybridisation of C6H6 and geometry of C6H6 |
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| 13. |
Best refrence book |
| Answer» Language of Chemistry and also ARIHANT | |
| 14. |
Calculate normality1. 0.01 molar of NaOH2. 2millimolar H2SO43. 0.02 molar H3PO44. |
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| 15. |
Calculate normality 1. 0.01molar of NaOH |
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| 16. |
Can you give me the structural formula of 2-Methoxybutane ? |
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| 17. |
Molecular Diagram of C2^+ |
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| 18. |
Differece between atom and element |
| Answer» An atom has a nucleus surrounded by electrons.\xa0But when three oxygen atoms combine to form an O3 molecule, it becomes Ozone. So another difference between atoms and molecules is that when similar atoms combine together in varying numbers, molecules of different properties can be formed. | |
| 19. |
Explain photoelectric effect on the basis of quantum theory |
| Answer» The Quantum Theory of Radiations by Max Planck can explain the photoelectric effect very well. Max Planck says that light is made of bundles of energy known as photons, energy of each photon being equal to hγ, γ being the frequency of the light. So when a photon of frequency being equal to the threshold frequency of the metal strikes the metal surface, it imparts its whole energy to an electron and hence helps the electron to overcome the forces of attraction from the nucleus of the atom. In this way an electron is ejected out of a metal surface when a photon strikes it. If the frequency of the photon is less that γ0 (threshold frequency), then no photoelectric effect is observed.But if γ>γ0 , then some of its energy (which is equal to the ionization energy) is consumed in ejecting the electron from the metal and the remaining is used to impart some kinetic energy to the ejected electron.Hγ= Ф + (½)mv2Here, Ф is the ionization energy, v is the velocity imparted to the ejected electron, m is the mass of the electron.As Ф=hγ0 , hγ= hγ0 + (½)mv2 Rearranging, (½)mv2 = h (γ-γ0)………….(1)Equation (1) is called Einstein photoelectric equation. | |
| 20. |
The law of conservation of mass is valid for all of the Following except |
| Answer» Yes | |
| 21. |
Draw the shape of s p d f element |
| Answer» Not possible here man. | |
| 22. |
Explain Neil Bohr\'s structure of atom |
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| 23. |
Chapter 2 ncert solution |
| Answer» Check NCERT Solutions here :\xa0https://mycbseguide.com/ncert-solutions.html | |
| 24. |
2mg+o2 =2mgo |
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| 25. |
What is electronvolt |
| Answer» Electronvolt is\xa0a unit of energy equal to the work done on an electron in accelerating it through a potential difference of one volt. | |
| 26. |
Write the significance of mendleev periodic table |
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| 27. |
What is radioactivity |
| Answer» Radioactivity is\xa0the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei. | |
| 28. |
Whose discovered neutron |
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Answer» Chadwick JAMES CHADWICK James chadwick |
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| 29. |
Calculate the wavelength of the first line of balmer series in hydrogen spectrum |
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| 30. |
explain s block |
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| 31. |
Why the cation is always placed first in ionic compound |
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| 32. |
What is polarity of bonds |
| Answer» Chauhan sahabBond polarity is a useful concept for describing the sharing of electrons between atoms. A nonpolar covalent bond is one in which the electrons are shared equally between two atoms. A polar covalent bond is one in which one atom has a greater attraction for the electrons than the other atom. | |
| 33. |
Why is potassium considered as an s block element |
| Answer» Because according to s,p,d and f configuration the last electron is in s orbital so it is considered as an s block element | |
| 34. |
Calculate the percentage of Fe and O in Fe3O4 |
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| 35. |
Ionisation energy of nitrogen is greater than that of oxygen |
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Answer» Yes ✅✅? Yes |
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| 36. |
Asume that you have 1.39mole of N2 and 3.44mole of H2 how many moles of ammonia con you formed |
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| 37. |
what is mass and weight? |
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Answer» \tS.No.MassWeight1.The mass (m) of a substance is the amount of matter present in it.Weight is the force exerted by gravity on an object2.It is a scalar quantity.It is a vector quantity.3.The mass of a body is constant and does not change from place to place.The weight of a body is not constant, it changes place to place.4.It can not be zero.It can be zero.5.It is measured in kg.It is measured in Newton(N).\t \tS.No.MassWeight1.The mass (m) of a substance is the amount of matter present in it.Weight is the force exerted by gravity on an object2.It is a scalar quantity.It is a vector quantity.3.The mass of a body is constant and does not change from place to place.The weight of a body is not constant, it changes place to place.4.It can not be zero.It can be zero.5.It is measured in kg.It is measured in Newton(N).\t |
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| 38. |
How would you justify the preswnce of 18 elements in the 5 period of periodic table |
| Answer» It is because 5th period has sub shell 5s,4d,and5p they have 1,5,3 orbitals so they have 2,10, 6 electrons and when we add them =2+10+6=18 electrons. So, by this we say that period 5has 18 elements | |
| 39. |
C6h12 five isomers |
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| 40. |
What would be the energy transition to remove electron from 2nd orbit of Be³+ ions |
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| 41. |
Calculate the number of electron which will together weigh one gram |
| Answer» Mass of an electron = 9.1\xa0{tex}\\times{/tex}\xa010-28 g9.1\xa0{tex}\\times{/tex}\xa010-28 g is the mass of = 1 electron1.0 g is the mass of =\xa0{tex}\\frac{1}{9.1 \\times 10^{-28}}{/tex}= 1.098\xa0{tex}\\times{/tex}1027\xa0electrons | |
| 42. |
What is molality and molarity |
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Answer» Number of moles of solute present in 1 kg of solvent is called molalityNumber of solute present in one litre of water is called molarity Molarity-no of mole of solute present in one litre in waterMolality- no. Of mole is present in one kg of solvent |
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| 43. |
Please send me examples related to fractional oxidation number |
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| 44. |
Plz Anyone describe gaseus law and maltiple proportional law plz? |
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| 45. |
Hi j. Ready for test. |
| Answer» Yes r. I am ready . please tell me your question. | |
| 46. |
Describe main postulates of bohr atomic model |
| Answer» Bohr\'s Model postulate that electrons revolves around the nucleus in circular path . OK | |
| 47. |
Calculate the amount of water produxed by the cimbination of 16 gram of methane |
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| 48. |
Explain formality? |
| Answer» Formality of a solution may be defined as the number of gram formula masses of the ionic solute dissolved per litre of the solution. | |
| 49. |
How many Metals, non– metals ,and metalloids are in periodic table |
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Answer» Aur kya ho rha h 93 metals , 20 non metals, 7 mettaloids |
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| 50. |
What are the properties of electron and who discovered electron ? |
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Answer» Electron have three fundamental properties:-Charge, mass and spin. By definition the electric charge on an electron is 1. The mass of an electron has been measured and found to be 9.109389*10 ki power -31 kilogram. Electrons also spin on their axes in much the same way that planets do. Electron discovered by the J. J. Thomson in 1897. electron discovered J J Thomson |
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