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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 12351. |
What is generally added for sterilization of water to make it fit for drinking purposes? |
| Answer» SOLUTION :A low CONCENTRATION of chlorine, i.e., 0.2 to 0.4 PARTS PER million parts (ppm). | |
| 12352. |
What is IUPAC name of compound when ketone group is attached to one isopropyl group and one t-butyl group ? |
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Answer» 2,4,4-trimethyl - 3-pentanone |
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| 12353. |
Which one of the following is more basic in nature? |
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Answer» `La (OH)_(3)` |
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| 12354. |
TwocrystallinesolidsX and Y areisomorphous. Whichof the followingisTRUEforthesecompounds ? |
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Answer» they havesamemolecularmass. |
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| 12355. |
Which one can be used to test for H_2S gas ? |
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Answer» A smell of rotten egg |
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| 12356. |
Which one is corrosion resistant ? |
| Answer» SOLUTION :Teflon | |
| 12357. |
Which is not true for a standard hydrogen electrode : |
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Answer» The HYDROGNE ION cncentratin is 1 M |
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| 12358. |
Urinary infections can be cured by using |
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Answer» CHLORAMPHENICOL |
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| 12359. |
Write IUPAC names of the following: C_6H_5 overset(+ )(N ) (CH_3 )_3 Br^(-) |
| Answer» SOLUTION :Trimethylphenylammonium BROMIDE. | |
| 12360. |
The value of K_(p)for the reaction at 500 K is 1.8xx10^(-2)"bar"^(-1).2NOCl(g)hArr 2NO(g)+Cl_(2)(g)K_(c ) for the reaction is |
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Answer» `4.3xx10^(-4)` |
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| 12361. |
What is the molecular formula of chromyl chloride? |
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Answer» `CrO_(2)Cl_(2)` |
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| 12362. |
What is the molecularity of this reaction ? Cl rarr (1)/(2) Cl_(2) |
| Answer» SOLUTION :MOLECULARITY of REACTION = 1 | |
| 12363. |
What are food preservatives ? |
| Answer» Solution :Chemical SUBSTANCES which are USED to PROTECT FOOD against bacteria, yeasts and moulds are called preservatives. For example, sodium benzoate, sodium metabisulphite, ETC. | |
| 12364. |
Which of the following is least reactive towards nucleophilic substitution? |
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Answer»
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| 12365. |
The state of hybridization of the central atom and the number of Ione pairs over the central atom in POCl_(3) are |
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Answer» sp,0  Hybridization `impliessp^(3)` LONE pair=0 |
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| 12366. |
Which of the following species is involved in the mechanism of OH^-substitution of chlorobenzene |
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Answer»
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| 12367. |
Which reaction is used for detecting the presence of carbonyl group: |
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Answer» REACTION with hydrazine |
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| 12368. |
Which metal is used to reduce Cr^(3+) ion? Why? |
| Answer» Solution :A STABLE `Cr^(3+)` ion, strong reducing agent which has high negative value for reduction POTENTIAL like METALLIC zinc (`E^(0)= -0,76 V`) is required. Metallic zinc is a powerful reducing agent due to its large negative VALUES. | |
| 12369. |
Which one of the following is the reagent used to identify glucose |
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Answer» Neutral ferrice chloride |
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| 12370. |
Which one of the following requires radicalintermediates? |
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Answer» `CH_(3)-CH=CH_(2)+HBR to CH_(3)-underset(BR)underset(|)(CH)-CH_(3)`   `-NH_(2)` group is electron releasing DUE to `+R` effect while `NO_(2)` group is electron withdrawin due to `-I and -R ` effects |
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| 12371. |
The theoritical spin-only magnetic moment of cobalt in Hg[Co(SCN)_(4)] is 3.87 B.M. |
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Answer» |
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| 12372. |
The solution of nickel sulphate in which nickel rod is dipped, is diluted to 10 times. The potential of nickel: |
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Answer» DECREASES by 60 mV |
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| 12373. |
Which of the following will give Cannizzaro reaction? |
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Answer» `CH_(3)CHO` |
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| 12374. |
Which of the following carbohydrates is not monosaccharide ? |
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Answer» GLUCOSE |
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| 12375. |
Which of the following true acid anhydride? |
| Answer» Solution :`H_(2)CO_(3)OVERSET(-H_(2)O)toCO_(2)` | |
| 12376. |
Which of the following is the major product of dehydration of 3, 3-dimethylbutan-2-o1 using H_(2)SO_(4) ? |
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Answer» 3, 3-Dimethyl but-1-ene The product is formed because of methyl shift. |
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| 12377. |
Which one of the following is used as a surgical anesthetic agent in surgery? |
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Answer» Ethanol |
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| 12378. |
Which one of the following compounds undergoes predominantly S_(N^(2)) reaction with aqueous NaOH in polar aerotic solvent? |
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Answer»
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| 12379. |
Two 5 molal solutions are prepared by dissolving a nonelectrolyte nonvolatile solute separately in the solvents X and Y. The molecular weights of the solvents are M_(x) and N_(y), respectively, where M_(x)=(3)/(4)_(y). The relative lowering of vapour pressure of the solution in X is 'm' times that of the solution in Y. Given that the moles of solute is very small in comparison to that of solvent the value of 'm' is |
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Answer» `(4)/(3)` |
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| 12380. |
When formaldehyde is heated with ammonia the compound formed is : |
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Answer» METHYL amine |
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| 12381. |
Which of the following reaction in the blast furnaces are endothermic ? |
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Answer» `C_((s))+O_(2(g)) hArr CO_(2(g))` Decomposition of `CaCO_(3)` is endothermic `CaCO_(3) to CAO+CO_(3)` |
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| 12382. |
Write the mechanism of the following reaction : 2CH_(3)CH_(2)Ohoverset("Conc. "H_(2)SO_(4))underset(413 K)rarr CH_(3)CH_(2)-O-CH_(2)-CH_(3) |
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Answer» Solution :Mechansim of the reaction can be described in the following STEPS : (i) `CH_(3)-CH_(2)-OVERSET(* *)underset(* *)O-H+H^(+)rarr CH_(3)-CH_(2)-underset(* *)overset(* *)(""^(+)O" ")-H` (II) 
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| 12383. |
What are lyophilic and lyophobic sols ? Give one example of each type. Why are hydrophobic sols easily coagulated ? |
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Answer» Solution :(i) Lyophilic colloids : The word .lyophilic. MEANS liquid having colloidal sols directly formed by mixing substances like gum, GELATINE, starch, rubber etc. with a suitable liquid (the dispersion medium) are called lyophilic sols. An important CHARACTERISTIC of these sol is that if the dispersion medium is separated from the dispersed phase the sol can be reconstituted by simply remixing with the dispersion medium. That is why these sols are also called reversible sols. Furthermore, these sols are quite stable and cannot be easily coagulated as discussed LATER. (II) Lyophobic colloids : The word .lyophobic. means liquid hating. Substance like metals, their sulphides etc., when simply mixed with the dispersion medium do not form the colloid sol. Their colloidal sols can be prepared only by special methods. Such sols are called lyophobic sols. These sols are readily precipitated on the addition of small amounts of electrolytes, by heating or by shaking and hence are not stable. Further once precipitated they do not give back the colloidal sol by simple addition of the dispersion medium. Hence, these sols are also called irreversible sols. Lyophobic sols need stabilising agents for their preservation. |
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| 12384. |
What is tailing of mercury ? |
| Answer» SOLUTION :Mercury on SHAKING with ozone is oxidised to `Hg_2O`and thus, loses its MENISCUS and `Hg_2O` sticks to GLASS. This is called tailing of mercury. | |
| 12385. |
Which gives difference between aldehyde and ketone |
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Answer» Fehling's solution Tollen's reagent `rArr NH_(4)OH+AgNO_(3)` Schiff's reagent `rArr` P-rosaniline hydrochloride or magenta Benedict's solution `rArr` Alkaline `CuSO_(4)+` itrate ions All these reagents are used to distinguish between ALDEHYDES and KETONES. Aldehydes reacts with all these reagents while ketones do not react. |
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| 12386. |
Which of the following are outer orbital complexes ? |
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Answer» `[CO(NH_(3))_(6)]^(3+)` |
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| 12387. |
Write the IUPAC name of following compound. |
| Answer» SOLUTION :5-Bromo-3,5-dimethylheptan-3-amine | |
| 12388. |
Write the IUPAC name of following compound. |
| Answer» SOLUTION :S[N, N - DIMETHYL AMINE] - 3 - methyl PENTANE | |
| 12389. |
Which of the following galvanic cells has no liquid-junction potential? |
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Answer» `underset((C_(1)))(ZN)-Hg|ZnSO_(4)"SOLUTION"|underset((C_(2)))(Zn)-Hg` |
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| 12390. |
Which of the following is not an antibiotics ? |
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Answer» Chloramphenicol |
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| 12391. |
Which of the following contains imino group [""_("/")^("\")NH] |
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Answer» ANILINE |
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| 12392. |
Write the IUPAC names of the following coordination compounds : (a) [Pt(NH_(3))_(2)Cl(NO)_(2)] (b) K_(3)[Cr(C_(2)O_(4))_(3)] (c) [CoCl_(2)(en)_(2)]Cl (d) [Co(NH_(3))_(5)(CO_(3))]Cl (e) Hg[Co(SCN)_(4)]** |
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Answer» Solution :(a) diamminechloridonitroplatinum (II) (B) POTASSIUM trioxalatochromate (III) (C ) dichlorido bis(ethane-1, 2-diamine) cobalt (III) chloride (d) pentaamminecarbonatocablat (III) chloride (E) mercury tetrathiocyanatocobaltate (II) |
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| 12393. |
Which of the following is glyceryl oleate |
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Answer» `(C_(15)H_(31)COO)_3C_3H_5` |
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| 12394. |
Which of the following is/are characteristic of an alpha-amino acid at their isoelectric point ? |
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Answer» It possesses no NET change |
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| 12395. |
What is the time (in sec) required to deposit all the silver present in 125 ml of 1 M AgNO_(3) solution by passing a current of 241.25 A? |
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Answer» 10 sec |
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| 12396. |
Two flask A and B have equal volumes, A is maintained at 300K and B at 600K, while A containes H_(2) gas, B has an equal mass of CO_(2) gas. Find the ratio of total translation kinetic energy of gases in flask A to that of B |
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Answer» `1:2` `((K.E.)_(A))/((K.E.)_(B))=((3)/(2)n_(A)RT_(A))/((3)/(2)n_(B)RT_(B))=((x)/(2)xx300)/((x)/(44)XX600)` `=11:1` |
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| 12397. |
Which one among the following transitions of electron of hydrogen atom emits radiation of the shortest wavelength ? |
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Answer» n=2 to n=1 |
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| 12398. |
Which of the following will giveSN^(2) reaction |
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Answer» `C_(6)H_(5)CH_(2)-X` |
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| 12399. |
The specific conductance of an N/10 KCl solution at 18^(@)C is 1.12 xx 10^(-2) "mho cm"^(-1). The resistance of the solution contained in the cell is found to be ohms. Calculate the cell constant. |
| Answer» SOLUTION :`0.728 CM^(-1)` | |
| 12400. |
Zone refining is based on the principle that |
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Answer» impurities of LOW boiling metals can be separated by distillation. |
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