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. |
On adding dil.HCl acid to copper oxide powder,the solution formed is blue-green in colour.Predict the new compound formed which imparts a blue-green colour to the solution. |
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Answer» The equation (l-m/2)x^2 -(l+m/2)x +m =0 got two VALUES of x to satisfy the equation GIVEN as |
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| 2. |
what is the reason behind generating electricity in salty water if there is a magnet and a copper foil in it? |
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Answer» The EQUATION (l-m/2)X^2 -(l+m/2)x +m =0 GOT TWO values of x to satisfy the equation GIVEN as |
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| 4. |
Calculate the composition of potasium hydro salphate khso4 |
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Answer» K = 39 H = 1 S = 32 0 = 16
KHSO4 = 39+1+32+16*4 = 136 |
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| 5. |
Find A and B PLEASE SOLVE THIS . |
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Answer» Formaldehyde on reaction with Grignard's REAGENT FOLLOWED by hydrolysis gives a primary alcohol as the final product. 1-propanol is the product formed here. Check the attachment further↓ Hope it HELPS!! |
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| 6. |
Mo denotes Molybdenum .is it right? |
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Answer» Yes , MOLYBDENUM is element with ATOMIC no. 42 which is silvery, hard METAL with high MELTING point. |
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| 7. |
Determination the %of water or crystallization is simple of green vitriol |
| Answer» THATS your answer my CALCULATION may be wrong but METHOD is RIGHT | |
| 9. |
What are the components of the sulphuric acid |
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Answer» Sulfuric acid, sulfuric also spelled sulphuric (H2SO4), also called OIL of vitriol, or hydrogen sulfate, dense, colourless, OILY, corrosive liquid; one of the most important of all chemicals, prepared industrially by the reaction ofwater with sulfur TRIOXIDE (see sulfur oxide), which in turn is made by chemical |
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| 11. |
Difference between mass and volume |
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Answer» The FEEL of heaviness or weight GIVES mass |
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| 12. |
Which spectral line of each series in hydrogen spectrum have(1) highest wavelength(2)lowest wavelength(3) highest energy(4)lowest energy |
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Answer» Lyman series Lyman series Humphrey series |
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| 13. |
true or false. 1) The spectrum of He is to be similar to that of hydrogen. 2)He is also one electron system. |
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Answer» 1 false since only H like species ( NA Li K) can have same properties |
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| 14. |
What are the steps oxidation-reduction reactions of glycolysis |
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Answer» Glyceraldehyde 3 PHOSPHATE to 1,3 bisphospho glyceric acid with NADH2 |
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| 15. |
Which step has the oxidation-reduction reactions of glycolysis |
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Answer» Glyceraldehyde 3 phosphate to 1,3 bisphospho glyceric ACID with NaDH2 |
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| 16. |
Write the reaction which form sodiumhydrogencarbonatr |
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Answer» Nacl+NH3+CO2+H2O=NAHCO3+NH4CL |
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| 17. |
Describe an activity to prove that gases had no definite shape and volume. |
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| 18. |
which law directly explains the law of conservstion of mass and how?? opsns r dalton's law,avogadro's law,berzillius law and hund's rule |
| Answer» DALTONS LAW ...is the ANS | |
| 19. |
Why aldehyde is more reactive that ketone towards nucleophilic substitution addition reaction? |
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Answer» Ketones are sterically hindered than aldehydes, DUE to presence of alkyl GROUP on both the side of the carbonyl CARBON, MAKING them less reactive towards nucleophilic ATTACK. |
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| 20. |
Why the ionisation.enthalpy of oxygenbis less than.nitrogen? |
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Answer» OXYGENS atomic configration is 1s¹ 2s²2p4 and nitogens is 1s² 2s²2p³. |
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| 21. |
Why should we need to study about strcture of an atom? |
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Answer» Because it PROVIDES you the basic of organic chemistry... THEERE are also many chapters that are based on the basic of STRUCTURE of atom.. |
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| 23. |
Write the steps you would use for making tea use the word solution solvent solute dissolved in soluble filtrate and residue |
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Answer» (I) tea can be PREPARED by FOLLOWING steps:Take 100ml of water as solvent and boil it few MINUTES. |
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| 24. |
Write the order of thermal stability of the hydrides of group 16 elements |
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Answer» On moving down the group the thermal stability of the ELEMENTS decreases because - -There is an increase in the SIZE of the atoms as the atomic the number of shells increases when we move down the group. -So, the bond dissociation enthalpy of HYDRIDES H-E (the energy required to break the bond of one mole of elements) decreases. Thus the order of thermal stability will be; H2O > H2S > H2Se>H2TE> H2Po. |
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| 25. |
Why is the use of aspartame limited to cold food and drinks? |
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Answer» ASPARTAME becomes unstable at cooking temperature.This is the REASON why its use is limited to COLD foods and drinks. |
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| 26. |
please give me this questions it is very important and urgent give the balanced equation of Nitrogen dioxide with water |
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| 27. |
Write any four drawbacks of bohr's theory of hydrogen atom |
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Answer» HEYA MATE hope this IMAGE will HELP you . THANK YOU :)) |
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| 29. |
IG you are bitten by yellow wasp what will you do |
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Answer» Rubbing a sting with an ice cube can help to reduce pain, as can APPLYING an ice pack. However, always wrap the ice pack in a CLOTH to protect the SKIN from damage. Medications, such as ACETAMINOPHEN or IBUPROFEN,can help reduce the pain and discomfort associated with ayellow jacketsting |
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| 30. |
With warm acidic permagnate solution alcohol is oxidized to |
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| 31. |
When two atoms share two pairs of electrons the bond is called? |
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Answer» A Triple bond is when three PAIRS of electrons are shared between TWO atoms in a molecule. It is the least stable out of the three GENERAL types of covalent BONDS |
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| 32. |
Why there is no no no reaction when silver is added to copper sulphate? |
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Answer» As copper is more REACTIVE than silver |
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| 33. |
Why thiophene is more aromatic than furan and pyrrole? |
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Answer» Since N is less electronegative than O, it will be slightly more stable than O with that positive CHARGE. Hence,PYRROLE will be more aromatic than furan. Therefore, according to me, the aromaticity ORDER should be: benzene > pyridine > pyrrole > furan > thiophene. But it is OBVIOUSLY wrong. |
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| 34. |
When sugar is dissolved in water, there is no increase in the volume. why? |
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Answer» There is the INCREASE in the volume. You can IDENTIFY that by putting more SUGAR in the WATER |
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| 35. |
When sugar dissolves in water it disappears. where does it go? |
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Answer» Between the particles of WATER the SUGAR particles GET trap and they are too small that we can't see with our naked eyes |
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| 36. |
The atom of any electron gain two electron which charge come on it ????????? plz help me fast |
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Answer» It BECOMES NEGATIVELY charged as the electron CONTAINS negative CHARGE. |
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| 37. |
Why is sun yellow in color even though helium burns with a blue flame? |
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Answer» The SUN is actually white in color it just APPEARS yellow DUE to INTERACTION with our atmosphere. |
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| 38. |
Why is bromination more selective than chlorination? |
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Answer» Because bromine is GOOD AGENT to CLEAN water than chlorine is |
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| 39. |
Why halogenation occurs more readily on more substituted carbon? |
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Answer» Because carbon cation US generally more STABLE at more SUBSTITUTED carbon |
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| 40. |
Why dipole moment is not calculated for ionic bonds as ionic bond also contain some covalent character? |
| Answer» IONIC BONDS are NON DIRECTIONAL in narure | |
| 41. |
Why calcium carbonate disappear on passing excess carbon dioxide? |
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Answer» When CO2 is passed through lime-water, it turns MILKY due to the FORMATION of an insoluble precipitate ofCalcium CARBONATE. ... The CaCO3precipitate causes the milkiness. If youpass EXCESS CO2 through lime-water, the CaCO3 reacts with the excess CO2and water to form CALCIUM hydrogencarbonate or calcium bicarbonate. |
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| 42. |
Why are the bells used in temples are made up of metal why not iron? |
| Answer» BELLS are made metal because they produce good tone and resonance, as do bells made of crystal, ceramic, and other materials. Bells, in fact, are not only made of metal, although the MAJORITY are. ... Metals used for bells are SPECIALLY designed alloys that make a nice ringing sound. | |
| 43. |
What is the empirical formulaif you have 81.82 % carbon and 18.18% hydrogen? |
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Answer» Here's your ANSWER...... |
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| 44. |
the ph of gastric juce extracted from the stomach of two person a abd b were found to be 1 and 3 respectiveli. the stomach juice of which person is more acidic |
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| 45. |
Which is the gaseous layer surrounding the earh is? |
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Answer» It is ATMOSPHERE which is layering our earth which consists of ozone which helps in REDUCING the effect of UV rays of Sun. |
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| 46. |
Which isotope of iodine is used in the treatment of goitre? |
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Answer» Exceptionally useful radioactiveisotope is iodine-131, which has a half-life of EIGHT days. It is EMPLOYED in medicine to monitor thyroid gland functioning, to TREAT goitre and thyroid cancer, and to locate tumours of the brain and of the liver. It is ALSO USED in investigations to trace the course |
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| 47. |
Which is more bond lenght alkanehalide and arryl halide? |
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Answer» Aryl HALIDES have PARTIAL double bond character because of the resonance of the lone pair of the halide with the BENZENE ring, and thus the bond energy of aryl halides is GREATER as compared to alkyl halides. |
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| 48. |
Which is heaviest amino acids among 20 amino acids? |
| Answer» TRYPTOPHAN is HEAVIEST AMINO ACID. | |
| 49. |
Which amino acid is heaviest among the twenty amino acid? |
| Answer» TRYPTOPHAN is the heaviest AMINO ACID with chemical FORMULA c11h12n202 | |
| 50. |
What are the six different types of chemical reactions and examples? |
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Answer» Combination REACTION |
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