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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. |
Determine the pH value of NaOH at different strength using pH paper and universal indicator |
| Answer» | |
| 2. |
Why half fill and fully filled orbital are more stable than partially filled orbitals |
| Answer» Orbitals which are half filled do certainly have unpaired electron or electrons with all the spins oriented in one direction. So certainly they are unstable. Orbitals which are filled fully have all the electrons paired. Hence they are highly stable. | |
| 3. |
On comparing hydrogen &methane which one is having more force of attraction &why? |
| Answer» methane..because atom of C is more electronegative than H.So CH4 has more force of attraction due to positive charge on H atom and negative charge on C atom | |
| 4. |
Ven der Waals equation for n Mole of gas |
| Answer» | |
| 5. |
Why 1s orbital contain only 2 electrons |
| Answer» Two electrons in an orbital create opposite electric and magnetic fields due to their spin. Now if a third electron enters it spin would match with any one of the two electrons of orbit, so repulsion will occur and third electron will not enter into the orbit. | |
| 6. |
Sir I have doubt in hyperconjugation. |
| Answer» | |
| 7. |
Why entropy of ice is less than that of water ????? |
| Answer» As because ice is in solid state of H2O whereas water is in liquid state. As entropy is less in solid state and greater in liquid because of randomness of the particle. | |
| 8. |
What is line spectra? |
| Answer» Line spectrum is the result of the interactions of the quantum systems and a single photon. These systems are especially associated with atoms and sometimes with the molecules or atomic nuclei | |
| 9. |
Why cathode Ray tubes are partially evacuated? |
| Answer» | |
| 10. |
Biological importance of sodium, magnesium,and potassium |
| Answer» | |
| 11. |
Boyle\'s law |
| Answer» Boyle\'s law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa, when temperature is held constant.Therefore, when the volume is halved, the pressure is doubled; and if the volume is doubled, the pressure is halved. | |
| 12. |
Determine the molecular formula of 75% carbon and 25% hydrogen ( molecular mass=48g) |
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Answer» C3H12 exist think it your sell maximum hydrogens attached with 3 carbon are 8 how you say it\'s c3h12 no..i solved it....it\'s C3H12 Is it 3CH4 it has 75 percent carbon and 25 percent hydrogen by mass and it\'s molecular mass is 48u |
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| 13. |
Determine the oxidation number of Mn in K2Mno4 |
| Answer» The oxidation no.of Mn in K2MnO4 is 6 Let Mn o.n is x then2+x+4 (-2)= 02+× = 8× =6 | |
| 14. |
Write the lewis dot structure of co molecule |
| Answer» Idiot | |
| 15. |
Balance the equationMno4–+H2O2=MnO2+O2+OH— |
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| 16. |
Convert the following into basic units 28.7pm |
| Answer» | |
| 17. |
Halogenation of alkanes |
| Answer» | |
| 18. |
Chemical properties of alkanes |
| Answer» | |
| 19. |
Why grgnard reagent is used in grignard reaction ? |
| Answer» | |
| 20. |
Why *** important before marrige |
| Answer» Kyu ki tum pagal ho | |
| 21. |
What is third law of thrmodaynamic |
| Answer» The Third Law of Thermodynamics is concerned with the limiting behavior of systems as the temperature approaches absolute zero. ... The Third Law states, “The entropy of a perfect crystal is zero when the temperature of the crystal is equal to absolute zero (0 K).” | |
| 22. |
Structure of alkyne |
| Answer» | |
| 23. |
gibbs Energy |
| Answer» It is the capacity of the system of perform useful work or non- mechanical work. | |
| 24. |
States boyles law |
| Answer» Boyles law states that at constant temperature, pressure is inversely proportional to volume of gas | |
| 25. |
What is intensive property and give examples is intensive property |
| Answer» Intensive properties are properties of matter that do not change when you vary the amount of matter. Intensive properties are intrinsic or essential to the nature of the substance. Examples of intensive properties are color, boiling point, pressure, molecular weight and density.Density is mass divided by volume, both mass and volume are extensive properties, or dependent on the amount of matter. | |
| 26. |
Comment on the position of hydrogen in the periodic table with respect to alkali metals and halogen |
| Answer» | |
| 27. |
Difference between strong electrolyte and weak electrolyte. |
| Answer» Strong electrolyte are good conductor of electricity because strong electrolyte ionised completely but weak electrolyte aren\'t good conductor becz they not ionis completely | |
| 28. |
Balance the equation in basic medium p4 + NaOh +H2O - PH3 + 3 NaH2PO2 |
| Answer» | |
| 29. |
What is the nature of the chemical equilibrium.? |
| Answer» Dynamic in nature | |
| 30. |
What is meant by a reaction to be a forward reaction? |
| Answer» | |
| 31. |
What is absolute zero degrees temperature? |
| Answer» -273 degree Celsius | |
| 32. |
what are ion ion forces |
| Answer» | |
| 33. |
What does the equilibrium constant K less than 1indicate? |
| Answer» IT indicates that reactant is produced more than product at equilibrium | |
| 34. |
Why we ignore the mass of electron when we calculate the mass of an atom? |
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Answer» Bcqs in comparion to the mass of nucleons mass of electron is very small approx. 10000 times so we ignore it Generally when working out the mass of atoms and molecules we can ignore the mass of electron.Notice that most of the mass of an atom is found in its nucleus :the mass no. Of an atom is the total no. Of proton and neutron it contain. |
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| 35. |
What is the difference between absolute temperature and critical temperature? |
| Answer» | |
| 36. |
How many electron in an atom of mass 1kg |
| Answer» 1/9.1*10^-31 electeons | |
| 37. |
What are magnetic quantum numbers |
| Answer» | |
| 38. |
Out of the H2O and B2O what is used as modator? |
| Answer» B2O | |
| 39. |
Why do chlorine and iodine have higher priority than bromine ?? |
| Answer» | |
| 40. |
Is chlorine more stable than bromine ? |
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Answer» YES!!!!!!Cl is less stable..... No chlorine is less stable than bromine because of its valency |
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| 41. |
Write a program to find largest value of given three integer for dev c++ |
| Answer» Noob | |
| 42. |
52 mole of He contain how many atoms |
| Answer» 7828600000000000000000000,7.8286×10^24 | |
| 43. |
Which. Mens. Of. Chemistry |
| Answer» | |
| 44. |
In thermodynamics, why is the work done -P delta V in case of expansion? |
| Answer» Because in this case work in done by the system ,and final volume is greater than initial volume so its difference comes to be positive and overall work done becomes negative. | |
| 45. |
how many how many number of molecules present in 0.5 g H2o |
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Answer» 16727777780000000000000 molecules 1.6×10 to the power 22 . 1.67 * 10^23 Use the formula :- No. of molecules/avagadro\'s constant=weight in grams/ gram molecular mass |
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| 46. |
What is shielding efect |
| Answer» In a multielectronic atom attraction force on outer shell electrons is reduced by near by electrons ,is known as shielding effect . | |
| 47. |
How do atoms combine? |
| Answer» By the bond with electron sharing | |
| 48. |
What is hydride and it\'s oxidising state |
| Answer» | |
| 49. |
What is equilibrium constant? |
| Answer» Kc. =product/reactant | |
| 50. |
What is the bond angle and dipole moment of water? |
| Answer» Dipole moment is calculated to be 1.85 D and the angle of the water molecule is 104.5°. | |