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. |
How many sigma (sigma) bond and pi (pi) bond are present in benzene diazonium chloride [C_(6)H_(5)N_(2)Cl) ? |
|
Answer» `6-SIGMA, 3-pi` chloride : `(C_(6)H_(5)N_(2)Cl)` There are …… `4pi` bonds of four double bonds. `4sigma` bonds of four double bonds. `5sigma` bonds of five C - H bonds. `(5 sigma" bonds of five single bonds.")/("Total " 14 sigma" bonds and " 4pi " bonds.")` 
|
|
| 2. |
How many (sigma) bonds are present in P_(4)O_(10) ? |
|
Answer» 6 |
|
| 3. |
How many sigma- and pi- bonds are there in the molecule of tetracyanoethylene ? |
|
Answer» NINE `sigma-` and nine `PI-` bonds |
|
| 4. |
How many sigma and pi bonds are present respectively in the final product obtained by the Reimer-Tiemann reaction of phenol ? |
| Answer» Solution : 15 and 4 | |
| 5. |
How many sigma and pi bonds are present in Vinyl Chloride ? |
|
Answer» `5 SIGMA` and `1pi` |
|
| 6. |
How many sigma - and pi - bonds are present in the structure of D.D.T. respectively ? |
|
Answer» 17, 6 |
|
| 7. |
How many sigma and pi bonds are present in formaldehyde molecule ? |
| Answer» Solution :Three sigma and ONE PI bonds are present in FORMALDEHYDE | |
| 8. |
How many sets of four quantum number are possible for the electrons present in He^(2-) : |
|
Answer» 4 |
|
| 9. |
How many series are in d-block elements? What are they? |
|
Answer» Solution :There are 4 series in d-block ELEMENTS. They are, 3d series : 4th PERIOD : Scandium to Zinc 4D series : 5th period : Yttrium to Cadmium 5D series : 6TH period : Lanthanum to Mercury 6d series : 7th period: Actinium to Californium |
|
| 10. |
How many series of 'f' block elements are known? |
| Answer» SOLUTION :2-series, NAMELY 4f-series (LANTHANOIDS) and 5f-series (ACTINOIDS). | |
| 11. |
How many seconds are there in 2 days? |
|
Answer» |
|
| 12. |
How many secondary carbon atoms does methyl cyclopropane have? |
|
Answer» None |
|
| 13. |
How many 'S' atoms are arrange in a cyclic form in the monoclinic sulphur ? |
|
Answer» 2 |
|
| 14. |
How many sandwiches, each containing 1 slice of cheese and 2 slices of bread,can you make with 30 slices of bread and 20 slices of cheese? Which is in the limiting quantity? |
| Answer» SOLUTION :15, BREAD | |
| 15. |
How many S-S bond are there in S_(2)O_(7)^(-2) |
|
Answer» |
|
| 16. |
How many S-S bond in polythionic acid having molecular formula H_(2)S_(5)O_(6)? |
|
Answer» |
|
| 17. |
How many S-S bond are present in SO_(3) trimer |
|
Answer» |
|
| 18. |
How many reducing saccharides are there in following list ? (a) alpha-D-mehtylglucopyranose (b) beta-D-glucopyrancose (c )Cellulose (d) maltose (e ) Sucrose (f ) D-fructose (g) Starch (h) alpha-D-fructofuranose |
|
Answer» |
|
| 19. |
How many reactions will produce carboxylic acid, as their end product |
|
Answer» |
|
| 20. |
How many reactions form one of the product is grignard reagent in given reactions? (P) CH_(3)-C-=C-H+CH_(3)-MgBr rarr (Q) CH_(3)-CH=O+CH_(3)-MgBr rarr (R) CH_(3)-CH_(2)-Cl+Mg overset(THF) rarr (S) +PhMgBr rarr (T) +CH_(3)-MgBr rarr |
|
Answer» <P> |
|
| 22. |
How many promary structural alcohols isomers are possible forC_5H_(11) OH? |
|
Answer» 5 |
|
| 23. |
How many products (structure isomers only) are formed by monochlorination of given compound ? |
| Answer» SOLUTION :N//A | |
| 24. |
how many products (structural isomers) are formed by monochlorination of given compound ? |
|
Answer» |
|
| 25. |
How many product are obtained in the gives reaction ? |
|
Answer» 1 |
|
| 26. |
How many primary formula of C_(4)H_(11)N ? |
|
Answer» 1 `(i) CH_(3)CH_(2)CH_(2)NH_(2)""` (ii) `CH_(3)overset(CH_(3))overset(|)(CH)-CH_(2)NH_(2)` (iii) `CH_(3)overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-NH_(2)""`(IV) `CH_(3)CH_(2)overset(CH_(3))overset(|)(CH)-NH_(2)` |
|
| 27. |
How many primary halides(excluding stereo isomers) are possible for the molecular formula C_5H_11Br? |
Answer» 
|
|
| 28. |
How many primary , secondary , tertiary and quanternary carbons are present in the following hydrocarbon CH_3-CH(CH_3)-C(CH_3)_2-CH_2-CH(CH_3)-CH_2-CH_3 |
|
Answer» `{:("PRIMARY", "SECONDARY","TERTIARY ","Quanternary"),(6,2,2,1):}` 
|
|
| 29. |
How many primary carbon atoms are there in the compound, CH_3 - underset(underset(CH_3)|)overset(overset(CH_3)|)(C)- CH_2 -underset(underset(CH_3)|)overset(overset(CH_3)|) C- CH_3? |
|
Answer» 2 |
|
| 31. |
How many primary carbon atoms are there in the compound butane |
|
Answer» 6 |
|
| 32. |
How many primary carbon atoms are present in a 2,2,4-trimethyl pentane ? |
| Answer» ANSWER :D | |
| 33. |
How many primary amines are possible for the formula C_(4)H_(11)N |
|
Answer» Solution :`UNDERSET("(1-aminobutane)")(CH_(3)-CH_(2)-CH_(2)-CH_(2)-NH_(2))` `{:(CH_(3)-CH_(2)-CH-CH_(3)),("|"),(""underset("(2-aminobutane)")(NH_(2))):}` `{:(""CH_(3)),("|"),(CH_(3)-C-CH_(3)),("|"),(underset("(2-Methyl-2-aminopropane)")(NH_(2))):}` `{:(overset(3)(C)H_(3)-overset(2)(C)H-overset(1)(C)H_(2)-NH_(2)),("|"),(underset("(2-Methyl-1-aminopropane)")(CH_(3))):}` |
|
| 34. |
How many primary amines are possible for the compound C_(3)H_(9)N ? |
|
Answer» 1 |
|
| 35. |
How many primary amines are possible for the formula C_4 H_(11) N |
|
Answer» 1 `(1)CH_(3) CH_(2) CH_(2) - CH_(2) - NH_(2)` ` (2)CH_(3)-CH_(2) - UNDERSET( NH_(2) ) underset(|) (C H) - CH_(3)` `(3 )CH_(3) - overset( CH_(3)) overset(|) underset( CH_(3)) underset(|) (C ) -NH_(2)` `(4 )C_(2) H_(5)- underset( CH_(3) ) underset(|)( CH) -NH_(2)` |
|
| 36. |
How many primary amines are possible for compound C_(3)H_(9)N? |
| Answer» Solution :For the COMPOUND `C_(3)H_(9)N`, two primary amines are possible. | |
| 37. |
How many primary amines are possible with formula C_4H_11N ? |
|
Answer» 1 |
|
| 38. |
How many possible alkene isomers are formed, when 2-bromo, 3-methyl butane is treatedwith alc. KOH ? |
Answer» 
|
|
| 39. |
How many positional isomerswould resultondichlorinationof 2,4 -dimethylpentane ? |
|
Answer» |
|
| 40. |
How many polypeptide chains are joined togetherin insulin molecule ? |
| Answer» SOLUTION :TWO or 2 . | |
| 41. |
How many pi- bonds are present in ferrocene? |
|
Answer» HENCE value of N i.e., no. of UNPAIRED electrons=3 |
|
| 42. |
How many pi electrons are contained in each molecule ? |
|
Answer» |
|
| 43. |
How many (pi)-bonds are there in the nitrogen molecule ? |
|
Answer» One |
|
| 44. |
How many photos at 620 nm must be absorbed to melt 10 gm of ice. If 320 J of heat is required to convert 1 gm of ice at 0^(@)C [take : hc = 1240 eV-nm] |
|
Answer» `10^(21)` Energy required `= 320 XX 10 = 3200 J` `E = n xx (1240)/(LAMBDA)` E in eV, `lambda` in nm `(3200)/(1.6 xx 10^(-19)) = n xx (1240)/(620)` `n = (16000 xx 10^(-19))/(16) = 10^(22)` photons |
|
| 45. |
How many photons of light having a wavelength of 4000Å are necessary to provide 1J of energy ? (h= 6.63 xx 10^(-34)J.s, c=3 xx 10^(8)m//s) |
|
Answer» Solution :Energy of a photon = `hv= (hc)/(lamda)` `=((6.63 XX 10^(-34)J.s) (3XX 10^(8) m//s))/((4000 xx 10^(-10)m))` `=4.97 xx 10^(-19)J` `therefore` number of PHOTONS required `= (1J)/(4.97 xx 10^(-19)J)` `=2.01 xx 10^(18)` |
|
| 47. |
How many photons are emitted per second by a 5 mW laser operating at 620 nm? |
|
Answer» |
|
| 48. |
How many peptide linkage are present in the following NH_2-CH_2-oversetoverset(O)(||)C-NH-oversetoverset(CH_3)(|)CH-oversetoverset(O)(||)C-NH-CH_2-CH_2-oversetoverset(O)(||)C-NH-oversetoverset(CH_3)(|)(CH)-CH_2-oversetoverset(O)(||) ( C)-NH-CH_2-COOH |
|
Answer» |
|
| 49. |
How many peptide linkage present in penta peptide? |
|
Answer» 1 |
|