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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. |
Why aninine basic in nature |
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| 2. |
What is ions please explain ? |
| Answer» When elements atom lose or gain any electron it also gain some charge these charge particle ( atom) is called ions | |
| 3. |
How electronegativity is inversely proportional to bond length? |
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| 4. |
Quantum number detail spdf |
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Answer» i forward this in my notes so kaisa ya kaha copy ho gaya i dont know so pls delete this pls delete this answer Quantum numbers are the numbers which define the location of electrons in the orbitals around the nucleus of an atom.There are four quantum numbers, viz,Principal quantum number (n) : It defines the main shell to which an electron belongs. The values of n =1,2,3,4,........Azimuthal quantum number (https://s3mn.mnimgs.com/img/shared/discuss_editlive/2953302/2012_05_18_14_37_29/mathmlequation7324071334710021666.png) : It tells us the number of subshells present in the main shell and the orbital to which an electron belongs. Its value is equal to 0 to (n-1).Magnetic quantum number (m) : It informs the level of degeneracy of the orbitals. Its value is equal to -https://s3mn.mnimgs.com/img/shared/discuss_editlive/2953302/2012_05_18_14_37_29/mathmlequation7324071334710021666.png,0,+https://s3mn.mnimgs.com/img/shared/discuss_editlive/2953302/2012_05_18_14_37_29/mathmlequation7324071334710021666.png.Spin quatum number (s) : It tells us whether the electron in an orbital is spinning in upward direction or downward direction. s has two values +1/2 for upward spin and -1/2 for downward spin. |
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| 5. |
Explain absorption spectrum. |
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| 6. |
Which reference book is good for chemistry? Plz tell me |
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Answer» Pradeep ?? Dinesh is good must say\xa0 |
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| 7. |
What is dioxygen |
| Answer» Dioxygen is said to be 2 molecules of oxygen. | |
| 8. |
The number of neutrons in trtium? |
| Answer» 2 | |
| 9. |
Define wave nature of electromagnetic radiation ? |
| Answer» You should ask wave nature of matters/light/atoms. Not wave nature of electrmagantic radiation. | |
| 10. |
Express 5.607892 upto 4 significant figure. |
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Answer» The exact answer will be 5.608 The answer is 5.608?? 5.608 |
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| 11. |
How many electron are possible for which (n+l)= 5 |
| Answer» n+l=5 means it is 3d so d has 10 electrons | |
| 12. |
What is the no.of molecules of ethane in its three moles?? |
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Answer» Thnku Nancy 18.06 ×1023 molecules. |
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| 13. |
What is a molar mass of C2H5OH |
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Answer» 46.0674 46 g 46.068g |
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| 14. |
What is the mass in grams of 6.22×10^23 atoms of oxyegen |
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Answer» 16 g 32g |
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| 15. |
Molarity and molality |
| Answer» Molarity : Number of moles of solute in 1litre of solution.Molality: Numer of moles of solute in 1 kg of solvent.In Molarity we use solution(Litre) in Denominater.In Molality we use mass of solvent(kg) instead of solution in denominator. | |
| 16. |
Calculate the actual mass of a molecule of SO2 |
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Answer» SO2= 32+16*2=64 32 |
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| 17. |
Which book is best for chemistry? |
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Answer» grb is the best book for class 11 and 12 both for iit Grb Pradeep Pradeep chemistry |
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| 18. |
The molecular formulae of the elements are C6H6 and H2O2.what is the empirical formula |
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| 19. |
which element has only one electron o d orbital |
| Answer» Scandium | |
| 20. |
How the value of "h" plank constant was calculated |
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| 21. |
Calculate the waveno. 2nd line in the balmer series |
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| 22. |
Why gravity do not work in cathode or anode ray tube experiment |
| Answer» Bcoz both cathode and anode rays move with very high velocity so that gravity do not work on them | |
| 23. |
1 mole of carbon is burnt in air calculate the amount of carbon dioxide that could be produced. |
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| 24. |
In atomic mass why not add mass of electron |
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| 25. |
Cuso4+h2 |
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| 26. |
Differentiate between electron gain enthalpy and ionzation energy. |
| Answer» Its nearly same | |
| 27. |
Hii everyone i am new to this app |
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Answer» Hello dearTell, how we help you through this appWe are also members of this app Hlo Hi |
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| 28. |
Limitations of J.J Thomson\'s model of atom |
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Answer» a) It could not explain the result of the scattering experiment performed by Rutherford. Could not explain stability of atom |
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| 29. |
What is the basic theme of organisation in the periodic table |
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| 30. |
How many Columb are required to convert one mole of Al3+to Al |
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| 31. |
Calculate volume of 3.4g NH3 gas at STP , assume its ideal behaviour |
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| 32. |
What is the SI unit of luminius intesity |
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Answer» Candela.. candela Candella Cd candela |
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| 33. |
what is meant of one mole of crystalline hypo |
| Answer» pls answer this its urgent?? | |
| 34. |
2 mole of carbon are burnt in 16 gram of dioxygen |
| Answer» O2 continues to be limiting and thus again we get only 0.5mole of CO2 | |
| 35. |
Syallabus for class 11 science in which month which chapter are needed to be done |
| Answer» It depends on your school syllabus . It differs from each and every school | |
| 36. |
Explain planck\'s quantum theory and photoelectric effect. |
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| 37. |
what is aufbau ? |
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Answer» Aufbau principle is the submission of 2 rules:- 1) Lowest sum rule:- That orbital will filled first for which the value of n will be minimum.E.g. 3d= n+l=3+2=5 4s=n+l= 4+0=42)If the value of (n+l)willbe same then that orbital will filled first which value of n will be minimum..E.g. 3p=n+l=3+1=4 4s= n+l=4+0=4 Aufbau principle states that : In the ground state of the atoms, the orbital are filled in increasing order of their energies.i.e electrons first occupy the lowest energy orbital available to them and enter in the higher energy orbital only after the lower energy orbitals are filled.The order in which the electrons are filled is :1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p.. and so on The aufbau principle states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levelsbefore occupying higher levels. |
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| 38. |
Exlain empirical formula |
| Answer» Simple formula that is used to derive molecular formula, it is calculated by the ratio of the no. Of moles of elements. Ratio of molar mass and empirical formula mass gives n, then multiply n and empirical formula, which gives molecular formula. | |
| 39. |
S.chand for chemistry is good i know praddep is best but i want to know |
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Answer» I think pradeep is good ABC is easy to understand Because in pradeep there are many que. I think pradeep is better for chemistry |
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| 40. |
How does the existence of line spectra support for Bohr model of the atom? |
| Answer» Till Rutherford the spectra formed by atoms couldn\'t be explained. Bohr\'s model of hydrogen atom could explain the reason behind formation of spectra of single electron atom like hydrogen and hydrogen like particles but its one limitation was that it couldn\'t explain spectra of mutielectron atom. | |
| 41. |
What is the photo electric effect? |
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Answer» Thanks hlo friend ur ans is When a beam of lyt with high frequency is made to fall on metallic surface then electrons are made photo electrons. When light falls on the surface of the metal it ejects electrons. This is photoelectric effect. For this, each metal should posses minimum frequency (threshold)frequency |
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| 42. |
why Hcl has covalent bond? |
| Answer» HCl is a binary compound of two non-metals. It produces H+ and Cl- ions only in aquous solution, wherein water acts as a base. In its normal gaseous state it exists as a simple, discrete covalent molecule, though the H-Cl bond has considerable polarity. It has no features of an ionic substance. | |
| 43. |
What is ionization enthalpy and electro gain enthalpy |
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Answer» Elecron gain enthalpy is the energy released or absorbed during gaining of electron. Ionisation enthalphy is the amount of energy required to remove the losely bounded electron from isolated gaseous atom. |
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| 44. |
Calculate the no.of moles of oxygen which is present in 6.022 ×10 ki power 23 molecules of N2 |
| Answer» we have do or own...but..i also tried but...i cant get the answer | |
| 45. |
calculate % ionic character of Hcl if its dipole moment is 1.03 D and Hcl bond length is 1.275A°? |
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| 46. |
explain ....in detail about role of quantum no |
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| 47. |
30 mol |
| Answer» Itni raat KO kaun padh rha h chemistry? | |
| 48. |
explain hybrdisation theory ? |
| Answer» The process of intermixing of two set of orbitals of slightly different energies to redistribute their energies in a new set of orbital formed. The new set of orbitals so formed is called hybrid. | |
| 49. |
Factor affection of ionization energy |
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Answer» Penetration power and screening effect Nuclear charge, atimic size, electronic configuration |
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| 50. |
Chemical formula of castic soda |
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Answer» Caustic soda- common name.Sodium hydroxide-chemical name.Formula-- NaOH. it is the common name of sodium hydroxide.. so it\'s formula is - - NaOH |
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