Saved Bookmarks
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. |
Define Hybridasion |
|
Answer» It is a redistribution of the energy of orbitals of individual atom to give orbitals of equivalent energy happens when two atomic orbitals combine together to form hybrid orbitals in a molecule. Hybridization is defined as the mixing of the atomic orbitals belonging to the same atom but having slightly different energies so that a redistribution of energy takes place between them resulting in the formation of new orbitals of equal energies and identical shapes. The new orbitals thus formed are known as hybrid orbitals. |
|
| 2. |
Blue print of cbse class 11 chemistry |
| Answer» | |
| 3. |
How fine lines are produced |
| Answer» | |
| 4. |
How you clarify electron are not situated randomly???? |
| Answer» | |
| 5. |
Calculate the mass of a photon with the wavelength of 3.6 Å |
| Answer» lamda = 3.6 angstrom = 3.6 x 10-10 mvelocity of photon = velocity of lightm = h/lamda*v ( from de-brogile’s equation)m = 6.626 x 10-34/3.6 x10-10 x 3 x 108m = 6.626 x 10-32/10.8m = 0.6135 x 10 -32m = 6.135 x 10-33 kg | |
| 6. |
What is the mass of a photon with wavelength of 3.6 Å |
| Answer» lamda = 3.6 angstrom = 3.6 x 10-10 mvelocity of photon = velocity of lightm = h/lamda*v ( from de-brogile’s equation)m = 6.626 x 10-34/3.6 x10-10 x 3 x 108m = 6.626 x 10-32/10.8m = 0.6135 x 10 -32m = 6.135 x 10-33 kg | |
| 7. |
What is black body reactiin |
|
Answer» An object that absorbs all radiation falling on it, at all wavelengths, is called a black body. When a black body is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature. Its emission is called black-body radiation. The ideal boy which is emitted by black body ,is called the black body reactiin |
|
| 8. |
What is hydrides |
| Answer» | |
| 9. |
Molecular electronic configuration... And hybridization |
| Answer» Hybridization=is defined as mixing up of orbital | |
| 10. |
Define concentration in chemical equilibrium |
| Answer» | |
| 11. |
Thomson modael of atom |
| Answer» | |
| 12. |
I can\'t understand the chemical bonding |
| Answer» You can understand this from channel gravity circle on YOUTUBE | |
| 13. |
How to prepare for exam?P.s dont make foolish answers. |
| Answer» Just read the notes and listen the teachers lectures carefully | |
| 14. |
How to prepare for ch1 if chemistry and especially the mole concept...?please help me out |
| Answer» Keep on doing more and more practice | |
| 15. |
What is electron cloud and how it is reated to dipole movement |
| Answer» | |
| 16. |
Which orbit is close to neuron |
| Answer» The k shell and s orbit is the closest to neutron | |
| 17. |
Hlo Friends, Question is How to strong chemistry. |
|
Answer» If you will not write what you have learnt then you cant represent it So it is the main point to get better results in chemestry make it in practice by writteng it I have just one formula Love chemistry Live chemistryIf you can\'tLeave chemistry |
|
| 18. |
Write electricconfrigration on Na+. Cl- |
|
Answer» Na+ = 1s²2s²2px²2py²2pz¹Cl- = 1s²2s²2p⁶3s²3p⁵ 1s^2, 2s^2, 2p^6 (Ne)3s Please |
|
| 19. |
Among alkali metals which has strongest reducing character |
| Answer» Li | |
| 20. |
What is formula of mass fraction |
| Answer» = Mi / M ( total mass ) | |
| 21. |
What would be the IUPAC name and symbol for the element with atomic number 120? |
|
Answer» Unbinillium=ubn There are only 118 elements, still according to rules 120=unbinilium symbol=Ubn |
|
| 22. |
How to find oxidation state |
| Answer» Oxygen | |
| 23. |
Easy mathod to learn prodic table |
|
Answer» By help of YOU TUBE Check arvind arora sir channel for this It will guve u some tricks to learn them Just check it on the u tube |
|
| 24. |
What do u mean by green chemistry? |
| Answer» Green chemistry, also called sustainable chemistry, is an area of chemistry and chemical engineering focused on the designing of products and processes that minimize or eliminate the use and generation of hazardous substances. | |
| 25. |
define octet rule |
|
Answer» According to octet rule, atoms combine with each other to have octet in their valence shell and achieve stable noble gas configuration Octet rule: Atoms can combine either by transfer of valence electrons from one atom to another (gaining or loosing) or by sharing of valence electrons in order to have an octet in their valence shells. The bonding in carbon dioxide (CO2): all atoms are surrounded by 8 electrons, fulfilling the octet rule.The octet rule is a chemical rule of thumb that reflects observation that elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas. The rule is especially applicable to carbon, nitrogen, oxygen, and the halogens, but also to metals such as sodium or magnesium |
|
| 26. |
Explaination of atomic mass |
|
Answer» The number of proton and number of neutron present in atom is called atomic mass Atomic mass is sum of neutrons and protons of the given atom Where the atomic mass is same in size but different inatomuc number |
|
| 27. |
9.117×10 |
|
Answer» 91.17 91.17 9.117 × 10 = 91.17 |
|
| 28. |
Explain the structure of water molecule. |
| Answer» Water has bent or inverted V shaped because it has 2 lone pair | |
| 29. |
Molecular formula of the compound formed from B and C will be:and why.A.BC2B.B2CC.BCD.BC2 |
| Answer» | |
| 30. |
How to improve my chemistry with _________ .??u knows w5what to fill gyies. |
| Answer» By visualising the results of reaction | |
| 31. |
Balance the ionic reaction in acidic medium MnO2 +I-=MnO2 + I2 |
| Answer» | |
| 32. |
bond formula of HNO2 molecule |
| Answer» | |
| 33. |
bond formula of molecule HNO2 |
| Answer» | |
| 34. |
How much volume will be occupied by 2 mole co2 at stp? |
|
Answer» Please give ans with solution mam . 44.8 liters |
|
| 35. |
Thermodynamics (work) |
| Answer» | |
| 36. |
Best notes all chapters |
| Answer» | |
| 37. |
Why bulb gives yellow light but LED gives white light |
| Answer» | |
| 38. |
Hello...anyone online??are your sa1 exams over in ur respective schools?? |
| Answer» | |
| 39. |
Which element is more metallic mg or al why |
|
Answer» Mg is more metallic than Al Magnesium is more metallic than aluminium because of the tendency to lose electrons Mg is more metallic according to metallic reactivity series |
|
| 40. |
Calculate the amount of water produced by the combustion of 16g of methane. |
| Answer» According to the above equation, one mole of CH4 (16 g) on combustion gives one mole of carbon dioxide and 2 moles of water and 2 moles of water = 2 x [2 + 16] = 36 g of water. | |
| 41. |
Define the mole |
| Answer» A mole is defined as the amount of a substance that contains exactly 6.02214076 * 1023 ‘elementary entities’ of the given substance. The number 6.02214076*1023 is popularly known as the Avogadro constant and is often denoted by the symbol ‘NA’. The elementary entities that can be represented in moles can be atoms, molecules, monoatomic/polyatomic ions, and other particles (such as electrons). | |
| 42. |
Write vander waal\'s equation for one mol of a gas |
| Answer» Generally Van- dar waal\'s equation is written ,( P + an²/V²)( V - nb) = nRTwhere , P is the pressureV is the volume , n is the no of mole of gases R is universal gas constant , T is te the temperature ( in K). also a and b are constant .For one mole Van dar waal\'s equation is( P + a/V²)( V - b) = RT | |
| 43. |
What is The most reactive element of halogen?? |
|
Answer» Flourine is the most reactive element in halogen family... fluorine |
|
| 44. |
Explain why are helium molecule is not possible by help of molecular orbital theory |
|
Answer» noble gas Because bond order of he2 is 0 |
|
| 45. |
Why molality is temperature independent??? |
|
Answer» Molality is the number of moles of solute per kilogram of solvent. it is denoted by "m".A 1.0 m solution contains 1 mole of solute per kilogram of solvent. Unit of molality is moles/ kg. Molality of solution does not change with the temperature of solution. In case of molality it is ratio of moles to mass. Mass is the same at any temperature hence molality wont change with change in temperature. Because there is no change in mass of solvent in kg but in molarity volume of liquid gets changed |
|
| 46. |
Why are bohrs orbit called stationary orbit |
| Answer» Because electron does not gain or loose energy in their particular orbit that is energy of an electron ina orbit remains constant . that s why these are called stationary orbit. | |
| 47. |
Methoxy methyl carbonation is more stable than propyl carbotion even through both are primary |
| Answer» | |
| 48. |
What is a formal charge ? |
| Answer» The formal charge of an atom in a polyatomic ion or a molecule is defined as the difference between the number of valence electrons in an isolated and the number of electrons assigned to that atom in a Lewis structure . Formal charge =Total number of valence electrons in free atom - Total number of non bonding electrons - 1/2( Total number of bonding electrons) | |
| 49. |
What is uncertainty ? |
| Answer» Uncertainty refers to epistemic situation involving imperfect or unknown information | |
| 50. |
Can anyone define the molecular orbital theory |
| Answer» The Hund& mnilitan defined the a.o.\'s mixed to produce molicular orbitals of different energy. | |