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. |
Find no e- present 2 gram of H2 |
| Answer» As number of moles=wtingm/mol mass. 2/2=1×avogadro no.=n^a | |
| 2. |
Why the ph change with temperature is ignored? |
| Answer» | |
| 3. |
What is radial node? |
| Answer» The region where the probability density function reduces to zero is called radial nodes or Nodal surfaces or nodes.\xa0For s orbitals, the number of radial nodes increases with the value of the principal quantum number n\xa0and found to be equal to (n - 1).The boundary surface diagram for the p orbital indicates the presence of two lobes that lie on either side of the plane that passes through the nucleus, giving a dumb-bell shape to the p orbital.The shape suggests that the probability of finding the p-electrons is the maximum within the two lobes. | |
| 4. |
what covlent bond |
| Answer» The bond between two elements with mutual sharing of electrons is known as covalent bond. | |
| 5. |
Number of p-s single bonds and p-s double bond p=s in p4s10 |
| Answer» | |
| 6. |
Describe the structure of the common forms of ice with diagram |
| Answer» | |
| 7. |
Define spin quantum no. |
|
Answer» In an orbital there can accomodate 2 electrons, but according to pauli exclusion principle- no 2 electrons in an atom can have the same set of 4 quantum nos, so the 2 electrons in the same orbital stay together by having opposite spins. this opposite spin is shown by the spin quantum no.It designates the orientation of the spin of an electron. that is spin quantum no. tells that the electron revolve in clockwise or anti-clockwise direction. For electron in clockwise direction it is given +1/2 and for electron in anti-clockwise direction it is given -1/2. The Spin Quantum Number (\\(m_s\\)) describes the angular momentum of an electron. An electron spins around an axis and has both angular momentum and orbital angular momentum. Because angular momentum is a vector, the Spin Quantum Number (s) has both a magnitude (1/2) and direction (+ or -). |
|
| 8. |
What is Tindal effect. |
|
Answer» When the beam of light comes from the tiny whole then it is obserbed that many partices are present in the environment and that effect was saw by a scientist tyndall so it is called tindal effect Tyndall effect is the phenomenon of scattering of light by the particles of colloid or suspension because of which the path of light is illuminated. The tiny particles scatter the beam of light and make its path visible. For example: Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in air. |
|
| 9. |
Explain the team polymerisation with two example |
| Answer» Hi | |
| 10. |
Lewis dot stuctrure of AlCl3 |
| Answer» | |
| 11. |
Important question of equilibrium chapter |
| Answer» Ya i will send uh personally...of NEET que... | |
| 12. |
Define spontanity |
| Answer» which happen itself like cooling of heatsubstance | |
| 13. |
what is the arrangement of frequency if "VIBGYOR"? |
| Answer» 7!/1!×1!×1!×1!×1!×1!×1!=7!. | |
| 14. |
What are Magic numbers |
| Answer» 8 8 18 18 32 magic no?????? | |
| 15. |
What is relation b/w molarity and mole fraction |
| Answer» | |
| 16. |
How to do wet test for anion in Chemistry practical? |
| Answer» | |
| 17. |
Vsepr theory significance |
| Answer» It is very important to know the shape of a molecule if one is to understand its reactions. It is also desirable to have a simple method to predict the geometries of compounds. For main group compounds, the VSEPR method is such a predictive tool and unsurpassed as a handy predictive method. But this is only one there are more so go for them may be in any reference book and GOOD LUCK FOR HALF YERLY | |
| 18. |
What is Kc and Qc.Relation between Kc and Qc |
| Answer» | |
| 19. |
State the conditions under which dead organisms are transformed into petroleum under the sea |
| Answer» Due to pressure and absence of oxygen | |
| 20. |
What is ∆S |
| Answer» It is know as delta s . It stands for distance covered by an object and denoted as \'s\' | |
| 21. |
Write the empirical formula of the compounds having molecular formula 1. C6H62. Na2CO33. C6H12 |
| Answer» It is not correct question because for calculating empirical formula we need molecular formula of the compound and a given weight . Here weight is not mentioned. | |
| 22. |
Important derivations in thermodynamics °chem |
| Answer» | |
| 23. |
What is shielding effect? |
|
Answer» Shielding effect is the repulsion felt by valence e from inner shell electrones The reluctance of \'ns\'orbital not to participate in bonding |
|
| 24. |
How do you get the molarity of pure water as 55.56 |
| Answer» Specify the units | |
| 25. |
Chemistry lab manual experiment 5.1 |
| Answer» you can check in general book | |
| 26. |
Name the scientist who first gave atomic model |
|
Answer» J.J.Thomson John Dalton may be thomsan |
|
| 27. |
Give example where the intermolecular forces are observed |
| Answer» | |
| 28. |
Fe 2+ + cr2o72- gives Fe3+ + cr 3+ |
| Answer» | |
| 29. |
Why he2 is not exist? |
| Answer» Because it\'s bond order is 0 | |
| 30. |
Why electrons do not exsist in a nucleus |
|
Answer» Electron can\'t exist in nucleus due to radius of nucleus is 10the power minus15 ,if electron exists in nucleus its uncertainty in position equal to 10per power minus15. 2 velocity of electron (5.8*10per power10 m per sec)is more than velocity of light so it is impossible.therefore electron can\'t exist in nucleus. Because speed of electron is more than the speed of light so if electron would exist inside the nucleus it will collapse and atom would be destroyed |
|
| 31. |
Why we said periodic table not group table to the classification of the elements? |
| Answer» | |
| 32. |
why the electron gain enthalpy of F is lower than that of Cl |
|
Answer» Because atomic size of f is more smaller that\'s why greater repulsion hence it requires more energy to add the electron due to the repulsion of other 1)due to small size of fluorine atom. 2)the incoming electron does not experience much attraction.3)there are strong\xa0interelectronic repulsions in the relatively small 2p orbitals of fluorine. ...... therefore fluorine has less\xa0negative electron gain\xa0enthalpy\xa0than that of chlorine F |
|
| 33. |
Why electron does not exist in nucleus |
| Answer» | |
| 34. |
Why resonance structure are imaginary ? |
| Answer» Resonating structures are totally imaginary structures as they are only used to explain the properties of a single molecule. There are no concrete experiments to prove the real existence of resonating structures. But the resonance hybrid has real existence. | |
| 35. |
How many node are present 3s &4p sub shell |
|
Answer» 2 and 6 2 and 6 respectively 2 and 6 respectively |
|
| 36. |
What is the Lewis Symbol of Mg ? |
|
Answer» Mg : Mg: |
|
| 37. |
In which reaction law of conservation of mass is not occur? |
|
Answer» Nuclear Power reactions do not obey the law of conservation of mass In nuclear reaction As far I know, if there is exception then I don\'t know In every reaction, law of conservation of mass occurs.... That is why it is a law.. |
|
| 38. |
Why glass show some features of liquid? |
| Answer» | |
| 39. |
What is Di hdrogen |
| Answer» When two atoms of hydrogen combine to form a hydrogen molecule , that molecule is called dihydrogen | |
| 40. |
Write electronic configuration for cr+++ ion. |
| Answer» Cr+++ (24-3 = 21 electrons) 1s2 2s2 2p6 3s2 3p6 4s2 3d1 | |
| 41. |
How are 0.50 mol Na2Co2 and 0 50M Na2Co3 are diffferent |
| Answer» | |
| 42. |
Definition of hydrogenation |
| Answer» Addition of hydrogen to unsaturated hydrocarbons in presence of a catalyst such as nickel or palladium to form saturated hydrocarbons is called hydrogenation. The process of hydrogenation is used in industry to convert vegetable oils to vanaspatighee. | |
| 43. |
What is the meaning of adiabatic |
|
Answer» Sorry It Was Loss Or Gain So Correct It Adiabatic Means Occurring Without Los Or Hain Of Heat |
|
| 44. |
Why pauli principale is called as exclusion ? |
|
Answer» According to Pauli\' s exclusion principle , no two electrons can have the same set of 4 quantum numbers. It can be also stated that an orbital can have a maximum of two quantum numbers and they will have opposite spin. Because if the electron has a 4 set of quantum nos then other electrons are excluded from having same set of quantum nos |
|
| 45. |
Give that ka value determine which species is the strongest base? |
| Answer» | |
| 46. |
H2O exist as liquid state where as H2S doesn\'t. why? |
|
Answer» thanks ? In water molecules the more electronegative oxygen atoms has small size and is present as a central atom, so that it form intermolecular hydrogen bonding strongly. But in case of H2s molecule, the central atom Sulphur is less electronegative and is bigger in size, so that it is unable to form the intermolecular hydrogen bonding. Therefore, H2s doesn\'t exist in liquid state. Hope this helps... Darshana? |
|
| 47. |
Ch 3 me cbse walo ne kya hata diya h |
|
Answer» Doberenier triads , Mendeleev periodic law , Newlands law of octave Mujhe kya pata |
|
| 48. |
A sample of MgSO4.xH2O loses 51.21% on heating find x |
| Answer» | |
| 49. |
What are conjugate acid-base pairs |
| Answer» tHE acId Base PaiR hAvIng DiffereNce OF oNe PrOTON. | |
| 50. |
Name the inert gas, noble gas,and radioactive gas. |
|
Answer» Inert gas -He,Ne,Ar. Noble gas-Kr,Xe and radioactive gas -Rn Rn Hi Xenon |
|