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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. |
stochiometri |
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| 2. |
How many electrons will be present in the subshell having value -1/2 for n=4? |
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Answer» 16 electron present 16 because max e- is 2n² so 2(4)² = 32And for ½ it is 32/2=16 16 electron |
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| 3. |
What is molars mass |
| Answer» The molar mass M is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by the amount of substance.The base SI unit for molar mass is kg/mol. | |
| 4. |
What is the difference b/w density and viscosity? |
| Answer» Density is the ratio of mass by volume and. Velocity is the ratio of total displacement by total time taken | |
| 5. |
What is ionization energy? |
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Answer» Ionization energy is those energy which is required to remove a electron from the outermost shell of an element. Ionization energy (IE):It isdefined 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.H(g)→H+(g)+e−This energy is usually expressed in kJ/mol, or the amount of energy it takes for all the atoms in a mole to lose one electron each. When considering an initially neutral atom, expelling the first electron will require less energy than expelling the second, the second will require less energy than the third, and so on. |
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| 6. |
What is morality |
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Answer» Morality is defined by the number of mol of solute present in a per unit volume of solution in litre. Molarity: The molar unit is probably the most commonly used chemical unit of measurement. Molarity is the number of moles of a solute dissolved in a liter of solution. A molar solution of sodium chloride is made by placing 1 mole of a solute into a 1-liter volumetric flask. For example we will use 58 grams of sodium chloride. Water is then added to the volumetric flask up to the one liter line. The result is a one molar solution of sodium chloride. |
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| 7. |
What drives a chemical reaction/ process? |
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| 8. |
Kab answer send karengay |
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| 9. |
What is resonance structure |
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| 10. |
What is emperical formula |
| Answer» The formula of the compound which gives the simplest whole number ratio of atom of the various element present in one molecule of the compound. Molecular formula =n× empirical formula . Where n is any integer. | |
| 11. |
What use of chemistry in our daily life? |
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| 12. |
Give reason for extra stability of half filled or fully filled orbital |
| Answer» In half filled or full filled orbital electrons can change their magnetic quantum number, change in magnetic quantum number cause less energy among orbital which cause more stability (less energy more stability) that\'s why half filled or full filled are extra stable | |
| 13. |
Atomic mass of potassium? |
| Answer» 40 is atomic mass of (K)19 atomic number | |
| 14. |
1gm metal carbonate on heating gives 0.56gm metal oxide.Find equivalent weight of metal. |
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| 15. |
What is the difference between inoinzatiom energy and binding energy nd excitaion energy |
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| 16. |
Brogile\'s de law |
| Answer» All moving particle (macroscopic and microscopic) have particle nature as well as wave nature . WAVELENGTH (lamda)=h/p Where p is planks constant This shows that wave character is inversely proportational to particle character . | |
| 17. |
Which bond is more polar in B-Cl , N-Cl , C-F , C-Cl and why ? |
| Answer» Ncrt answer | |
| 18. |
Please tell me hybridisation |
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| 19. |
Why the electronic configuration of chromium is exception |
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Answer» 1s2 2s2 2p6 3s2 3p6 3d5 4s1 because as we know half feild and full feild configration are more stable configration to sable the chromium thats why its configration is diffrent 1s2 2s2 2p6 3s2 3p6 4s1 3d5 |
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| 20. |
How does surface tension of liquid vary with temperature |
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Answer» There is a drop off to zero as the temperature increases to the critical point. For liquid that point is 650 C. Sorface tension decrease with increased in temperature .Surface tension increase with decrease in temperature. So surface tension is inversely proportional to the temperature. Plzz anyone snd me this ans |
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| 21. |
Define Planck\'s Quantum theory? |
| Answer» 1.Those wave which are associated with electric field and magnetic field are known as electromagnetic wave.2. electromagnetic wave emits energy in the form of radiation which is known as radient energy .3. Energy emits from any source discontinuously in the form of packets and bundles.A. These packets of energy and bundle of energy are called quantum.B. In case of light these packets are called photons.4. product of wavelength and frequency is always constant. 5. Energy of wave is directly proportional to frequency. E=h mu | |
| 22. |
What is difference between orbit and orbital |
| Answer» # Orbit are 2 D whereas orbital are 3 D.# Orbit are circular whereas orbital are of different shape.# Orbit does not follow Heisenberg principle whereas orbital follows Heisenberg principle. | |
| 23. |
Structure of cyanide ion |
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| 24. |
C2CN4 name |
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| 25. |
Draw shapes of H2O and C2H4 |
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| 26. |
Factors affecting chemical equilibrium |
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| 27. |
Pv=nRT |
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Answer» It is the equation for state of ideal gas What to do with this equation.???? |
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| 28. |
How many nodal plane exist in pi2px and pi2px* |
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| 29. |
What is MOT? |
| Answer» Molecular orbital theory | |
| 30. |
inization inthalpy |
| Answer» It is the amount of energy required to remove an electron from an isolated gaseous atom to form its cation to aquired noble gas configuration. | |
| 31. |
Which species is smallest aromatic substance? |
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Answer» Cyclopropenyl cation is an aromatic hydrocarbon or an arene. It has two pi (π) bonds and lacks an electron and follows the Huckel\'s rule that the compound must have a compound must have 4n + 2 π-electrons in order to be aromatic Cyclopropenyl Cation |
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| 32. |
d orbital in sp2d hybridization |
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| 33. |
Elastic collision in two dimensions |
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| 34. |
Which had more electron gain enthalpy O or N and why? |
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| 35. |
Valence shell electron pair repulsion theory? |
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| 36. |
What is Limiting reagents? |
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Answer» The Reactant which gets consumed in a chemical Reaction and thus, puts a limit over the reaction is known as Limiting Reagent The substances which are consume in the reaction are called limiting reagent. |
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| 37. |
Mendeeleev classification |
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Answer» The Physical and chemical properties of an element are the periodic function of their atomic masses. When the element are arranged When electron are arranged in the order of increasing atomic masses. Mendeeleev law state that the properties of element are peroidic function of their atomic masses. The properties of elements are periodic function of their atomic masses. |
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| 38. |
What is hund\'s rule? |
| Answer» Electron pairing will not take place in orbitals of same energy until each orbitals is single filled | |
| 39. |
What is dipole moment? |
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| 40. |
What is lattice enthalpy? |
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| 41. |
Define avogadro law |
| Answer» It states that equal volume contains equal number of molecule at constant temperature and pressure | |
| 42. |
Why diff. in dipole moment of NH3 and NF3 |
| Answer» In NH3 dipole moment is towards N but in NF3 dipole moment is towards F that\'s the difference | |
| 43. |
what is the bond angle of xy4 tetrahedral |
| Answer» The bond angle of tetrahedral molecules is 109.5° good night | |
| 44. |
why are water ? drops are spherical? |
| Answer» Due to surface tension of drops | |
| 45. |
Why electronegativity of non pauling scale is 3.0 |
| Answer» Cl has numerical value of 3.0 of electronegativty in pauling scale | |
| 46. |
How many moles of co2 are present in 3.011*10^20 molecules of co2 |
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| 47. |
Calculate the amount of water produce combustion of 16 g of methane |
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Answer» CH4+2O2=CO2+2H2O,16g ch4 reacts with 64g of oxygen form 44g of co2 and 36g of h2o it\'s a balanced equation 36g |
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| 48. |
Define molecular mass |
| Answer» It is defined as the mass of one molecule of an element or compound as compare to mass of one atom of carbon taken as 12 a.m.u | |
| 49. |
electro negativety definition? |
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Answer» Attracting property of electron It is the tendency of an atom in a covalent molecule to attract a shared electron pair Electronegativity is the degree to which an atom attracts electrons in a chemical bond.Fluorine (the most electronegative element) is assigned a value of 4.0. |
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| 50. |
What do u mean by n factor in stoichiometry |
| Answer» Number of moles | |