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. |
What is physical and chemical properties ? I want in detail , i doesnot want book answer |
| Answer» Physical properties : Those properties which can be seen easily without any reaction or test, for example, taste, colour etcChemical properties : Those properties which need a test to check them out, for example, acidic or basic nature, it\'s reaction with metals etc. | |
| 2. |
what are homo alicyclic compounds????? |
| Answer» Whaen a ring of three or more carbon atoms resembling aliphatic compounds are contained in homocyclic or carbocylic compounds, they are callef alicyclic compounds. | |
| 3. |
What are main diffrence between a molecules and compound ?? |
| Answer» A molecule is formed whentwo or more atoms join chemically.A compound hs at least two different elements | |
| 4. |
What is the meaning of static point charges ? |
| Answer» | |
| 5. |
limiting Reagent |
| Answer» Limiting reagent is the reacting species which is totally consumed when the reaction is completed. The amount of product formed depends on limiting reagent as the reaction would cease once the limiting reagent is completely used up. For example, let us suppose that in the reaction 2H2+ O2―> 2H2O , Hydrogen is the limiting reagent so, when the given amount of hydrogen in the reaction is completely consumed the formation of H2O would cease as no more H2will be available to combine with O2. i don\'t have book so i prefer Google | |
| 6. |
What will be the electronic configuration of boron |
| Answer» 1s2, 2s2, 2p1 | |
| 7. |
h20 is normal at room temperature wheras h2s is gas . explain? |
|
Answer» H2+s--->h2s H2S is an acidic oxide made up of hydrogen and sulphur. Sulpher is a gas and hydrogen too. |
|
| 8. |
Calculate the wavelength wave no. And frequency of photon having an energy equal to 3ev |
| Answer» | |
| 9. |
If the frequency of an electromagnetic radiation is 1 Hz then the energy of this radiation would be |
| Answer» It is equal to planks constant | |
| 10. |
What volume is occupied at nT.p 1.4g of nitrogen |
| Answer» its 1.12 L | |
| 11. |
The number of atoms in 4.25g of NH3 is approximately? |
| Answer» Molar mass NH3 = 14+3 = 17g/mol 4.25g = 4.25/17 = 0.25 mol NH3 1mol = 6.022*10^23 molecules 0.25 mol = 0.25*6.022*10^23 Number of molecules = 1.51*10^23 molecules NH3 | |
| 12. |
Which institute is best for coaching for class 11??? |
|
Answer» Helix or allen Ofcourse the stream is science Stream |
|
| 13. |
Atomic masses of all the elements |
| Answer» given in 9th class refresher.. | |
| 14. |
Define diagonal relationship |
| Answer» A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. | |
| 15. |
Which orbital we fill after 6s2 ? If your answer is 4f then see the e.c. of lanthanum |
| Answer» | |
| 16. |
what schrodinger wave equation in the briefest possible form? |
| Answer» | |
| 17. |
Why the Lyman series are ultraviolet and paschen , brackett and pfund are infrared? |
| Answer» Lyman series is the ground state energy level which is below the balmer series and balmer series are visible,that is why lyman are ultraviolet. . All the paschen, brackett and p -fund energy levels are above the balmer series . Therefore, they are Infrared . | |
| 18. |
what volume of 0.1 M HCL is diluted to 500 ml and 0.25 M HCL solution. |
|
Answer» 1.25 litre answer is coming Use the formula M1 V1 = M2 V2 |
|
| 19. |
Define gay-lussac\'s law |
| Answer» According to Gay- Lussac\'s law, the pressure of an ideal gas is directly proportional to its temperature. | |
| 20. |
Arrange in increasing order of size F- , li+ ,na+ , cl- |
|
Answer» then na, f and last cl li+ |
|
| 21. |
Why the molecular form of sulphur is S8 not S2? |
|
Answer» ya this is better. In a simple language, In case of sulphur, there is a large distance btw two atoms and its p -orbitals can\'t overlaps and form single bond instead of double bond. That is why ,it is in the form of S8 not S2. Sulfur exists in many allotropic forms. S8 the cyclic or ring structure with chemical bonds among the atoms. It is best known as well as most stable allotrope at room temperature and normal atmosphere. It reduces only in presence of strong acids. It is also known as ortho rhombiicsulfur. Sulfur exists as 4 isotopes and they contain sulfur of different oxidation states. |
|
| 22. |
State whether a solution of nitrate is a conductor of electricity or not? |
|
Answer» Yes , they can conduct electricity bcoz in a molten or liquid state of nitrate, electrons are free to move and can conduct electricity. yes they conduct electricity as in nitrate ions are free flowing |
|
| 23. |
What are causes of periodicity ? |
| Answer» The cause of periodicity of properties of elements is due to the repetition of similar electronic configuration of their atoms in the outermost energy shell after certain regular interval. | |
| 24. |
What is isobutane ? |
| Answer» It is an isomer of butane | |
| 25. |
Define radioactivity |
| Answer» The emmision of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei. | |
| 26. |
What is the difference between the mass of the molecule and gram molecular mass? |
| Answer» \tMolecular MassGram Molecular MassIt is a number equal to the sum of the atomic masses of all the atoms in a molecule. It is relative to the\xa012C, which has a mass of 12.It is the mass in grams of 1 mole of a molecular substance.Example: H2O has molecular mass 2+16=18Example: The molecular mass of N2\xa0is 28 so gram molecular mass of N2\xa0is 28.\t | |
| 27. |
What is chemistry? And how many branch of chemistry |
|
Answer» Chemistry is a branch of science that deals with atoms and molecules as well as the matter around us .Phusical chemistry,organic chemistry and in organic chemistry Organic chemistry, inorganic chemistry and physical chemistry Chemistry is a branch of science which studies matter |
|
| 28. |
Which books should i refer for chemistry for jee mains and advanced preparation? |
|
Answer» Arihant Go with Arihant\'s book... Just go for M.S.Chauhan and Dr.RK Gupta |
|
| 29. |
About carbon its compounds |
| Answer» Refer 10 th matric science syllabus 13th lesson | |
| 30. |
Is 7 period still considered as incomplete period |
|
Answer» Ya yes it is still considered as incomplete period Because it consists of elements whose properties have not been studied properly yet. |
|
| 31. |
Please tell me that how much i have to read to just pass class11? |
|
Answer» I mean top percentage you focus on your percenatge or to top in your class not for pass in 11 But which rank you are talking about? Don\'t think of pass just think of rank arey yarr... if you want to just pass then just go through with ncert by going through it you will definitely score passing marks ? |
|
| 32. |
Atomic weight and molecular weight of sulphur |
|
Answer» Molecular mass 256 U 32.065 |
|
| 33. |
What is the atomic weight of Sodium |
|
Answer» 23 23u |
|
| 34. |
What is the molecular weight of Sodium |
| Answer» 23u | |
| 35. |
The total no. of proton ,electrons and neutrons in12g ofcarbon |
| Answer» Proton no =6 = electron Neutron = 6 in carbon12 gram c means 1 mole of carbonSo total no of proton +neutron+electron=6×Na+6×Na+6×Na18 ×6.023× 10 power 23 | |
| 36. |
Calculate frequency of photon with e=4.13 ev |
| Answer» Use formula E=hv | |
| 37. |
What happens if we rotate a pie bond |
| Answer» I think.. pi bonds are bonded sideways and are perpendicular to the plane of the sigma bonds, therefore they cannot rotate. | |
| 38. |
The ratio of specific charge of proton and alpha particle is |
| Answer» Protons-positive charged , alpha contains neutrons, if there is only numericals for both of them, we can calculate the ratio | |
| 39. |
What is main difference between pie and sigma bond |
| Answer» A single bond is always sigma bond while a double bond is a sigma and a pi bond. The double bond may consists of both pi bonds as in case of C2 and B2 | |
| 40. |
what is quantum numbers |
| Answer» It is a set of 4 nos. with the help of which we can get complete info about all the electrons in an atom | |
| 41. |
What is inorganic compound |
|
Answer» Substances which we get from nature not from organisms Inorganic compounds are compounds which do not contain carbon and are not derived from living matter. |
|
| 42. |
I have heard that the syllabus of chemistry have been increased . Is it true??? |
|
Answer» Solid state is already there yes if you will go through the old syllabus also then also the left portion you will learn in 12th class There r many more changes Yes a new chapter named solid state is added in class 11 No physics syllabus change 1 unit is added No idiot |
|
| 43. |
Calculate the number of atoms present in 1.4 of N2 MOLECULE |
|
Answer» And then finding no of molecule multiply by 2 As Na×2×0.05That is answer Mole = total molecular weight/ ome molecular weightSo n = 1.4÷28 = o.05THEN no of N2 MOLECULE = .05×Na Na = 6.023×10 power 23 In 28g = 6.022 ×10 ki power 23 moleculesIn 1g =avogadro no. ÷ 28In 1.4 g= avogadro no. ÷ 28 ×1.4 moleculesNow multiply the answer with 2 |
|
| 44. |
How are 0.50 mol NA2CO3 and 0.50 M NA2CO3 DIFFERENT? |
|
Answer» Is it a qns Question is wrong |
|
| 45. |
Who provides energy in atom |
|
Answer» Fundamental particles - electron, proton, neutron. And Other particles such as masons. Me...? |
|
| 46. |
What is vander waal forces? |
|
Answer» Molecules can attract each other at moderate distances and repel each other at close range. The attractive forces are collectively called "van der Waals forces". Van der Waals forces are much weaker than chemical bonds, and random thermal motion around room temperature can usually overcome or disrupt them. Vander waal force are weak intermolecular force.Present between covalent molecule. |
|
| 47. |
S.i unit of volume |
|
Answer» Cm^3 or m^ 3 Thx The SI unit of volume iss m^ 3 |
|
| 48. |
Please tell me |
| Answer» What | |
| 49. |
100 ml .2molar fecl3 mixes with 200ml of.2 molar nacl find molarity of cl ions in the reaction |
| Answer» | |
| 50. |
Who had taken admission in abcc Academy |
| Answer» My frnd is taken admission in abcc academy | |