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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. |
what is orbitals |
| Answer» The area enclosed by an orbit where there is a probability to find an electron | |
| 2. |
What do you mean by dipole moment |
| Answer» | |
| 3. |
Important topics in the s-block elements |
| Answer» | |
| 4. |
What is structure of Becl2 |
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Answer» Structure of Becl2 is Linear Linear |
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| 5. |
Ruthorfords postulates |
| Answer» Postulates of Rutherford nuclear model: \tPositive charge is concentrated in the center of the atom, called nucleus.\tElectrons revolve around the nucleus in circular paths called orbits.\tThe nucleus is much smaller in size than the atom. | |
| 6. |
What is expanded octet,0dd octet, |
| Answer» | |
| 7. |
What is the syllabus of chemistry of sa1 |
| Answer» | |
| 8. |
Why are the bonds of PCl5 are different in length |
| Answer» Phosphorus is sp3d hybridization. It forms 5 equivalent sp3d orbitals. Each of it contain an unpaired electron. The structure of PCl5 is trigonal bipyramidal in which three chlorine atioms are at the corners of triangle while two chlorine atoms are axial. Bond length of axial bond is greater than the length of equatorial bond to minimixe the bond pair – bond pair repulsion between axial and equatorial bonds. | |
| 9. |
Quantum number |
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Answer» The number which determines the energy and positions of electrons in an atom are called quantum numbers It is denoted by small n which determines shells of electron Spdf |
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| 10. |
Spin quantum no explain and work |
| Answer» It is represented by \'s\'. It tells us about the direction in which the electron will spin i.e. clockwise or anticlockwise direction . Its value is +1/2 & -1/2 for each value of m.m=magnetic quantum no. | |
| 11. |
What is rydberg constant |
| Answer» It\'s numerical value is 109677cm | |
| 12. |
What is macroscopic property |
| Answer» | |
| 13. |
Hybridisation of XeF |
| Answer» | |
| 14. |
How many moles are there in 1kg of electron |
| Answer» The mass of an electron is {tex}9.1 \\times 10^{-31}{/tex} kgTherefore number of electrons in 1kg = {tex}1\\over 9.1\\times 10^{-31 }{/tex}electrons = {tex}1.09 \\times 10^{30 }{/tex}Electron Number of particles in 1 mole =\xa0{tex}6.023 \\times 10^{23}{/tex} (Avagadro’s constant)So , Number of moles ={tex} number \\ of \\ electrons\\over Avagadro’s \\ constant {/tex}= {tex}{1.09 \\times 10^{30}\\over 6.023 \\times 10^{23}} = {1.8 \\times 10^6}{/tex} electrons | |
| 15. |
What is nodalpoint |
| Answer» | |
| 16. |
What is the achievements and failure of bhor\'s model |
| Answer» | |
| 17. |
Balancing by oxidation no. P4+naoh+h2o=ph3+nah2po2 |
| Answer» | |
| 18. |
What are Aral rays |
| Answer» | |
| 19. |
What is molar volume and give the molar volume at S.T.P |
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| 20. |
Important points about black body and photoelectric effect |
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Answer» Its.. A perfect absorber as well as a perfect emitter also..... Its about black body.. Don\'t know |
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| 21. |
what would be the IUPAC name and symbol for the element with atomic number 101and118 |
| Answer» Impact name 101 unnilunium symbol unu , 118 ununoctium symbol Uuo | |
| 22. |
What are the bonds present in C2 molecule |
| Answer» It\'s single bond double bond as well as triple bond | |
| 23. |
Octet rule |
| Answer» | |
| 24. |
Name two anti cancer medicine? |
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Answer» Cisplatin and taxol are effective in cancer therapy Taxol Cis platin... |
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| 25. |
Do all the photons have same energy? |
| Answer» Depends upon the intensity of light | |
| 26. |
Why s and p have more shielding effect |
| Answer» If the electron is in shell that mean it is nearest to nucleus and if in f shell it is far from nucleus. Since, atomic shield spend on electron on electron density is very less for d and f shells, hence it has poor shielding effectas compared to s and p shell. | |
| 27. |
How many no. Of sigma and π bonds are there in pent-2-yne |
| Answer» Sigma is 4 and and pi is 2 | |
| 28. |
Energy level diagram |
| Answer» | |
| 29. |
What is molecular orbital theory and its significance ? |
| Answer» Molecular orbital theory is a method for determining molecular structure in which electrons are not assigned to individual bonds between atoms but are treated as moving under the influence of nuclei in the whole molecule. | |
| 30. |
Define screening effect |
| Answer» SCREENING EFFECT MAY BE DEFINED AS THE ELECTRON ELECTRON REPULTION IN ORBITS ,AS THE NO OF ELECTRON INCREASES WITH INCREASING ATOMIC NO. .THIS CAUSES ELECTRONS TO JUMP OUT FROM THE ORBITS CAUSING THE ATOMIC RADIUS TO DECREASE. (AS NO. OF e- DECREASES,BUT PROTON DOESN\'T,SO PER e- NUCLEAR CHARGE INCREASES,CAUSING ATOMIC RADIUS TO DECREASE.) | |
| 31. |
Quatum number |
| Answer» Quantum number describe the location and energy of electron in an atom | |
| 32. |
A certain compound has the molecular formula X4O6 if 10g of X4O6 has 5.72gX find atomic mass of x |
| Answer» | |
| 33. |
What is molequle |
| Answer» A molecule refers to to two or more atoms of the same or different elements which have chemically combined or bonded to form a single species usually termed as compounds.Examples of molecule : H2\xa0O , O2 CH4 etc.\xa0 | |
| 34. |
Calculate the uncertainty in position of an electron if the uncertainty in velosity is 5.7*10m/s |
| Answer» | |
| 35. |
What is ice |
|
Answer» The water (H2O) at freezing point.32 F0 C273.5 K Water frozen into solid state |
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| 36. |
What is resonance hybrid? |
| Answer» | |
| 37. |
Calculate formal charge on so42-,co32- |
| Answer» | |
| 38. |
Calculate the number of mole in 1.046 nitric tone of aluminum |
| Answer» | |
| 39. |
What is electro megnitic radiation |
| Answer» Electromagnetic radiation (EM radiation or EMR) refers to the waves of the electromagnetic field, propagating (radiating) through space carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-, and gamma radiation. | |
| 40. |
Why water exist in liquid phase whereas sulphur hydroxide exist in gaseous phase at room temperature |
| Answer» | |
| 41. |
What is formal charge |
| Answer» | |
| 42. |
Atomic mass of oxygen in 8 or 16 |
| Answer» 16 | |
| 43. |
Is it emperical formula or imperical\xa0formula? |
| Answer» It is empirical formula | |
| 44. |
What is mot |
| Answer» Molecular orbital theory | |
| 45. |
shapes of pcl5 and Sf4 by VSEPR theory |
| Answer» 1Traigonal by Framina2 Tetra Headeral | |
| 46. |
How to find no. of atoms in 1g of cl2 (g)? |
| Answer» No. of atoms=(Given mass)/(Molar mass)×avogadro\'s no.Therefore, no. of atoms =1g/2(35.5)×6.022×10²³=0.014 ×10²³=1.4×10²¹ | |
| 47. |
How many molecules of co2 are present in 1 l of containing 0.03 % volume of co2 at stp |
| Answer» | |
| 48. |
Explain gibbs energy |
| Answer» | |
| 49. |
Why hydrogen peroxide is used as pollution controller |
| Answer» | |
| 50. |
Why hydrogen peroxide is used as a pollution controller |
| Answer» | |