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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. |
20gram H2 completely react with O2 and produce Water Calculat amount of water |
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| 2. |
The radius of cation always smaller to its parental elements? Why? |
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Answer» Cation are always Smaller than their parental atoms, this is because they have lesser electrons, while their nuclear charge remains the same. The remaining electrons are, therefore held more tightly by the protons in the nucleus and thus their radii are smaller than the parental atom. Very simple..☺☺ |
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| 3. |
Define octate rule its condition and limitation with examples |
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| 4. |
What is normalities , its formula also? |
| Answer» Normality of a solution is defined as number of gram equivalents of solute present per litre of the solution. Thus, normality of a solution can be calculated using the following equation Normality = Number of gram equivalents of solute / Volume of solution (in litres)The number of gram equivalents are defined as= mass of solute / equivalent massFurther the equivalent weight of an element/compound is its atomic / molecular mass divided by its valence (number of electrons gained or lost by one molecule or ion of the substance in the reaction). | |
| 5. |
What is molecular mass of H2O ? |
| Answer» 18 gram | |
| 6. |
What are s-block elements? |
| Answer» Elements containing valence electrons in their s subshell | |
| 7. |
Is electron a particle or wave? |
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Answer» a/c to quantum mechanics electron possess wave and particle nature . It\'s a particle. It\'s not a wave bcz it not a disturbance occured by any vibrating particle. |
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| 8. |
what is ionisation enthalphy |
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Answer» The ionization energy (Ei) is qualitatively defined as the amount of energy required to remove the most loosely bound electron, the valence electron, of an isolated gaseous atom to form a cation. It is quantitatively expressed in symbols as X + energy → X+ + e− A quantitative measure of the tendency of an element to lose electron is given by its Ionization enthalpy |
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| 9. |
Claculate the equivalent weigt of kmno4 in acidic medium |
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| 10. |
How to balance ion electron |
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| 11. |
The smallest unit of light |
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Answer» Photon The smallest unit of light is photons. PHOTONS photon is the smallest unit of light. |
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| 12. |
What are stoichiometry |
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Answer» It represent the number of moles ...is called stoichiometry.. The study of chemecial reactions &calculations related to it called stoichiometry |
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| 13. |
What are quntome |
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Answer» Small packets of energy Packets of energy |
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| 14. |
electronic configuration of boron molecule |
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Answer» Electronic configuration of boron is 2,3 Electronic configuration = 2,2,1 first read the question its molecule 1s^2 2s^2 2p^1 |
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| 15. |
Calculate the volume of 34g of NH3 at STP. |
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Answer» calculate the volume of 34g of NH³ at stp thanks . Given mass of NH3 =34gMolar mass of NH3 = 11*2 +3*1=25gNo of mole = given mass of NH3/molar mass of NH3 =34/25=1.36molLet the volume of NH 3=xNo of mole =given volume/22.4L1.36=x/22.4X=1.36*22.4=30.464LI hope it helps u. 44.8L |
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| 16. |
How would you justify the presence of 18 elements in the 5th period of periodic table ? Explain |
| Answer» We start the 5th period with 4s orbital. We can add 2 electrons in 4s. Then we fill 6 electrons in 4p orbital. Further we start filling the 4d orbital which can take 10 electrons. So in the 4th principal quantum energy stater, we can fill 18 electrons. Thus 5th period has 18 elements. | |
| 17. |
Agar HCL se nha liya jay to kya hoga |
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Answer» Aur jyada dimag mat lga 10 th nhi kri to... Bhai question h tbhe to pucha h Is this really a question ? So stupid ofcourse body will be burned Meaningless question Agar tum pani me baith ke nhao ge to tumhaara sab kuch jal jaega Arey bro question to complete likh... Abe kise bol rha hai Tera question he clear nhi hai... Pagal hai kya tu bewakoof ladke Plz ask in detail. |
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| 18. |
What is poac? |
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Answer» POAC is the abbreviation used for Principle of Atom Conservation. It is very useful technique to solve the problems of \'chemical equations\' quickly & accurately too,especially in competitions it gives you an edge over others. Condom Principle of atom conservation |
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| 19. |
What is directional character? It\'s frm the chapter atomic structure. |
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| 20. |
How can we do electronic configuration with noble gases |
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Answer» Orbit They ns2np6 configuration for last orbital |
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| 21. |
Which is the most eletronigetive element in the periodic table |
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Answer» Fluorine No.its cl Fluorine |
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| 22. |
25c changes in kalivin |
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Answer» 273.16+25=298.16 273.15+25=298.15 K |
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| 23. |
how element attract each other from negative to posetive and positive to negative |
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| 24. |
Hybridization of h2so4 |
| Answer» H2SO4 has tetrahedral geometry and is sp3 hybridize | |
| 25. |
How many types of low of motion |
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Answer» It is in 9th or u can find it out in physics ncert It was in 9th std There are 3 types of law of motion.They are :- 1. Law of inertia , 2. Law of momentum and 3. Action and reaction law |
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| 26. |
Find the quantity of o.004 gram if an element |
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| 27. |
Qno:1.6 answer |
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| 28. |
Name the element whose isotope has mass no. 17 and 9 neutrons |
| Answer» Oxygen perhaps | |
| 29. |
What is rhe equivalent mass of k2cr2o7 |
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| 30. |
Molecular weight |
| Answer» Weight of one molecule | |
| 31. |
The first use of quantum theory to explain the structure of atom was made by |
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Answer» Bohr Planck Bohr |
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| 32. |
Is there any deduction in syllabus of class +1 and +2?? |
| Answer» Few parts of class 12 are changed to class 11 syllabus to reduce the syllabus i think so | |
| 33. |
What is atomic spectra... |
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Answer» Atomic spectra is the spectrum of radiation absorbed or released due to transitions between energy levels in an atom.Atomic spectra is based on the fact that an electron can move between shells. When an atom absorb energy, it get excited from ground state to excited state, the energy absorbed by the atom form absorption spectra while energy released by the atom on returning to ground state form emission spectra. ?? |
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| 34. |
State and explain redox reaction |
| Answer» When Oxidation and reduction reactions occurs simultaneously in a chemical reaction. | |
| 35. |
Can you tell the difference between molarity and molality |
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Answer» Molarity ia depends upon the temprature and molality does not depend upon the temprature Overall molarity me solution me kitna solute hi usko find krte hi Aur molality me per mass of solvent me kitna solute hi wo find krte h And molality is no of mole of in per kg of solvent Molarity is no of mole of solute present in per litre of solution |
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| 36. |
Steps for balancing chemical equations |
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Answer» Aapko feel ni hota kya ki aapka time waste hota h itna type krne [email\xa0protected] The balanced reaction is Ba (OH)2 + 2 NH4Cl ----------> BaCl2 + 2 NH3 + 2H2OGiven reaction is as under:-Ba(OH)2+NH4Cl---->BaCl2+NH3+H2OAs two chlorine atoms are present on the right hand side so multiply NH4Cl by 2 for getting equal number of Cl atoms on both the sides.reaction becomesBa(OH)2+2NH4Cl---->BaCl2+NH3+H2ONow on the left side two nitrogen atoms are present so multiply NH3 by 2. Now the reaction will beBa(OH)2+2NH4Cl---->BaCl2+2NH3+H2O.10 Hydrogens are present on the left hand side so multiply H2O by 2 on the right hand side.Ba(OH)2+2NH4Cl---->BaCl2+2NH3+2H2O.Oxygens are equal on both the sides. and next wait i answer you First step : Write down the chemical reaction in the form of a word equation, keeping the reactant on the left side and the products on the right side.Second step : Put the symbols and formulae of all the reactants an the products in the word equation. |
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| 37. |
What is black body |
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Answer» a body’s characteristics allows it to serve as ideal theoretical standard compared to all real radiating bodies. This is better known as black body radiation A black body is an idealized physical body that absorbs all incident electromagnetic radiation. The thermal radiation from a black body is energy converted electrodynamically from the body\'s pool of internal thermal energy at any temperature greater than absolute zero. It is called blackbody radiation and has a frequency distribution with a characteristic frequency of maximum radiative power that shifts to higher frequencies with increasing temperature.The answer to Planck’s law of black body radiation A black body is an idealization in physics that pictures a body that absorbs all electromagnetic radiation incident on it irrespective of its frequency or angle. ... The Planck radiation law explains the various electromagnetic radiations emitted by a black body at thermal equilibrium at a fixed temperature. |
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| 38. |
What is dual nature of matter |
| Answer» Are u talking about dual behaviour then it mean the matter can exhibit dual behavioir that is both partical and wave | |
| 39. |
What is atomic radius-give point to answer |
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| 40. |
What is mass percent? |
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| 41. |
basis concepts for chapter 1,2,3 like atomic masses , no |
| Answer» Pura h kya ye question | |
| 42. |
What are the basic constituents of matter |
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Answer» Matter consist of individual atom There are 3 states solid liquid and gas |
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| 43. |
Define hybridisation |
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| 44. |
Do we also consider the stoichiometric coefficient while balancing charges in an equation ? |
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Answer» itna toh kr hi sakta hun Tysm for this answer Nishant ???? haan kyu nhi |
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| 45. |
What is the total charge of electrons in 7mg sample of c14isotope? |
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| 46. |
Hlo friends anyone frndship with me |
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Answer» Hi Why |
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| 47. |
Calculate the number of moles in the following1- 7.85 gm of iron 2- 4.68mg of silicon |
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Answer» Oh sorry its gram bro What do mean by gm |
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| 48. |
Pauli principle rules derived |
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| 49. |
What is molecular weight of nitrogen in ammonium chloride? |
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| 50. |
What is stociometry? ? |
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