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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.
| 7351. |
Which of the following is correct for both the following coordination compounds ? (P) CoCl_(3).6NH_(3) and (Q) PtCl_(4).5NH_(3) |
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Answer» They give white PRECIPITATE with `AgNO_(3)` solution `(Q)to[Pt(NH_(3))_(5)Cl]Cl_(3)` |
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| 7352. |
Which of the following reactions will yield phenol ? |
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Answer»
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| 7353. |
Which of the following reaction/statement is incorrect? |
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Answer» Benzenediazonium chloride is prepared by the REACTION of aniline with nitrous acid at 273 - 278 K `C_6H_5NH_2 + NaNO_2 + 2HCl overset(273-278 K)to C_6H_5N_2^(+)Cl^(-) + NaCl + 2H_2O` Temperature must vary from `0.5^@ C` |
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| 7354. |
Which one of the following cannot be estimated byl_2? |
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Answer» `SnCl_2` |
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| 7355. |
Which of the following compound would give secondary alcohol when reacts with an excess of phenyl magnisium bromide followed by hydrolysis. |
| Answer» Answer :C | |
| 7356. |
When C_2H_5OH is mixed with ammonia and passed over heated alumina, the compound formed is : |
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Answer» `C_2H_5NH_2` |
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| 7357. |
The volume occupied by 22.4 g of a gas ("vap. Density" = 11.2) at NTP is |
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Answer» 22.4 LITRE |
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| 7358. |
Which two reagents are required to produce D.D.T. ? |
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Answer» CHLORAL and Chloroform |
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| 7359. |
The solution which are isotonic with 6% (W/V) solution of urea are : |
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Answer» 18% (W/V) solution of glucose `C_((Urea))=6g/100mL=60G/L=((60g))/((60"g mol"^(-1)))=1M` `ppi_((urea))=iCRT=RT(i=1)` `pi_((glucose))=18g/100mL=180G/L=((180g))/((180"g mol"^(-1)))=1M` `pi_("glucose")=iCRT=RT.I(i=1)` `(b)pi(BaCI_(2))=iCRT=(3)xx(0.5)RT=1.5RT` ltbtgt `(c) pi_(("sucrose"))=CRT=(1)RT=RT` `(d)pi_(("acetic acid"))=CRT=iCRT=2xx1RT=2RT` Thus (a) and (c) are isotonic with 6% solution of urea. |
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| 7360. |
What is Rosenmund's reduction? What is the purpose of adding BaSO_(4) in it? |
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Answer» Solution :(i) When reduced with hydrogen in the presence of 'poisoned' palladium catalyst, they form aldehydes. This reaction is called Rosenmund reduction. `underset("Acetyl chloride")(CH_(3)-underset(O)underset(||)(C)-CL)+H-Hunderset(BaSO_(4))overset(Pd)tounderset("Acetaldehyde")(CH_(3)-underset(O)underset(||)(C)-H)+HCl` (ii) `BaSO_(4)` is used as a catalytic poison to stop the reduction at the stage of aldehyde. (iii) Otherwise, the aldehyde formed will be further reduced to primary alcohol. |
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| 7361. |
To which series will the following elements belong? ""_(103)^(257)Lr, ""_(99)^(254)Es, ""_(95)^(243)A m |
| Answer» SOLUTION :`(4n+1, 4n+2, 4n+3)` | |
| 7362. |
Which of the given statements is incorrect about boric acid? |
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Answer» It is a weak monobasic acid |
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| 7363. |
What are primary cells? |
| Answer» Solution :PRIMARY cells are those in which the redox reaction OCCURS only once and the cell BECOMES DEAD after sometime and cannot be USED again. | |
| 7364. |
Which pair of elements can form multiple bond with itself and oxygen ? |
| Answer» ANSWER :D | |
| 7365. |
You are given benzene, conc. H_2SO_4 and NaOH. Write the equations for the preparation of phenol using these reagents. |
| Answer» Solution :`UNDERSET("BENZENE")(C_6H_6)underset(("Sulphonation"))OVERSET(conc.H_2SO_4.Delta)tounderset("Benene sulphonic acid")(C_6H_5SO_3H)underset(-Na_2SO_3)overset("NaOH. fuse. 573 K")tounderset("SOD Phenoxide")(C_6H_5ONa)underset(-NaCl)overset(Dil. HCL)to underset("Phenol")(C_6H_5OH)` | |
| 7366. |
What will be the product of reaction, ""_(101)^(255)Md (alpha, 2n)? |
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Answer» `""_(103)^(256)Lr` |
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| 7367. |
Which of the following does not form lyophilie sol? |
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Answer» gelatin |
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| 7368. |
Write the mechanism of corrosion. |
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Answer» |
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| 7369. |
underset((g))(A)+1/2underset((g))(B)tounderset((g))(2C)+1/2underset((g))(D) the rate of disappearance of B is x. What is the rate of appeance of C? |
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Answer» 3x |
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| 7370. |
Write IUPAC name of: CH_(3)-CH_(2)-CH=CH-overset(O)overset(||)(C)-H |
| Answer» SOLUTION :Pent-2-en-1-al | |
| 7371. |
Which of following compound gives positive isocyanide test? |
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Answer» `CH_(3)-NH-CH_(3)` |
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| 7372. |
Which of the following is nitrogenous fertilizers |
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Answer» Bone MEAL |
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| 7373. |
Which of the following pair of substances are used as promoter in Haber process for production of NH_3 ? |
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Answer» FeO and Fe |
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| 7374. |
What would be the atomic number of the missing species in the given transmutation .^(10)B(alpha,n)__________ |
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Answer» |
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| 7376. |
The reagent used in the conversion of Benzaldehyde to Benoin is ........... |
| Answer» SOLUTION : ALCOHOLIC KCN | |
| 7377. |
What is lanthanoid contraction? Mention the cause for it. |
| Answer» SOLUTION :The gradual decrease in the ATOMIC and ionic RADII of lanthanide elements due to poor shielding of 4F electrons. | |
| 7378. |
Two liquids X and Yform an ideal solution. At 300 K, vapour pressure of the solution containing I mol of X and 3 mol of Y is 550 mmHg. At the same temperature, if 1 mol of Y isfurther added to this solution, vapour pressure of the solution increases by I 0 mmHg. Vapour pressure ( in mmHg) of X and Yin their pure states will be, respectively: |
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Answer» 300 and 400 `550 =p_(A)^(@) xx1/4 +p_(B)^(@) xx3/4` `p _(A)^(@) + 3P _(B)^(@) =550 xx 4 ""…(i)` In seond case `P _("total") = p_(A)^(@) xx1/5 +p_(B)^(@) xx4/5` `p _(A) ^(@)_ +4P _(B)^(@) =560 xx5 ""...(II)` Subtract (i) from (ii) `therefore jp _(B)^(@) =560 xx5-550 xx 4=600` `because p _(A)^(@) =400` |
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| 7379. |
Which of the following statements is true regarding molecularity and order of reaction? |
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Answer» Order of the reaction can be determined from stoichiometry of the reaction |
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| 7380. |
Victor Meyer's test is not given by |
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Answer» `(CH_(3))_(3)COH` |
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| 7381. |
Which of the following is better fuel ? |
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Answer» Solid |
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| 7382. |
Which of following is not considered transition element? |
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Answer» Zn |
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| 7383. |
Which of the following does not involve sp^(3) hybridisation of the central atom ? |
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Answer» `SiH_(4)` |
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| 7384. |
What volume of 0.1M KMnO_(4) is needed to oxidize100 mgof FeC_(2)O_(4) in acid solution ? |
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Answer» `4.1` ML  ` :. V = 4.1` ml |
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| 7385. |
Which of the following will not produce ethane? |
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Answer» REDUCTION of `CH_3COOH` with HI and RED P |
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| 7386. |
What is the relationship between depression in freezing point of a solution and molecular mass of the solute ? |
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Answer» Solution :DEPRESSION in freezig point `(DeltaT_f)` is related with molecular mass (M) of solute as FOLLOWING : < br> `DeltaT_f = K _f "(W xx 1000)/(M xx W)` where `K_f` = molal elevation constant of SOLVENT < br> w = wt. of solute in gm W = wt. of solution in gm |
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| 7387. |
Which of the following ions give ppt. with BaCl_(2) solution? |
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Answer» `SO_(4)^(2-)` |
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| 7388. |
Total number of paramagnetic complexes which are inner orbital complexes : (i) [Cr(NH_(3))_(6)]Cl_(3) "" (ii)[Co(NH_(3))_(6)](NO_(3))_(2)"" (iii)[Ni(NH_(3))_(6)]SO_(4) (iv) K_(2)[PtCl_(6)]. "" (v) [V(H_(2)O)_(6)]SO_(4) "" (vi) [Mn(NH_(3))_(6)]SO_(4) (vii)[Fe(H_(2)O)_(5)(NO)]SO_(4) "" (viii)K_(3)[CuCL_(4)]"" Na_(4)[Fe(CN)_(5)(NOS)] |
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Answer» |
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| 7389. |
The substrate molecules are held by enzymes with________. |
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Answer» COVALENT bond |
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| 7390. |
Which of the following is not true for ligard-metal complex? |
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Answer» (a) LARGER the ligand, the more stable is the metal-ligand bond |
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| 7391. |
Write the formula for optical purity & enantiomeric excess. |
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Answer» `%"Enantiomeric excess" = (|d-l|)/(d+l) xx 100 = ("excess of ONE enantiomer over other")/("entire mixture") xx 100` |
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| 7392. |
Which of the following does not contain a hydrophobic structure? |
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Answer» Linseed oil |
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| 7393. |
Derive the relationship between elevation in boiling point and molar mass. |
| Answer» SOLUTION :`DeltaT_f m = k_f [(w_2/M_2 XX 1000/w_1)]` | |
| 7394. |
Which of the following reactions is taking place resultingin discolouration of marble of the buildings like Taj Mahal? |
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Answer» `CaCO_(3)+H_(2)SO_(4)RARR CaSO_(4)+H_(2)O+CO_(2)` |
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| 7395. |
When 3-Phenylpropene reacts with HBr in the presence of an organic peroxide, the major product formed is: |
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Answer» 2-Bromo-1-phenylpropane<BR>1,2-Dibromo-3-phenylpropane |
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| 7396. |
Which of the following statements about benzaldehyde is/are true? |
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Answer» REDUCES Tollens' reagent |
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| 7397. |
Which of the following compounds would undergo Aldol condensation, which the Cannizzaro reaction and which neither ? Write the structures of the expected produces of aldol condensation and Cannizzaro reaction : (i) Methanal (ii) 2-Methylpentanal (iii) Benzaldehyde (iv) Benzophenone (v) Cyclohexanone (vi) 1-Phenylpropanone (vii) Phenylacetaldehyde (viii) Butan-1-ol (ix) 2,2 Dimethylbutanal. |
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Answer» Solution :(i),(iii) and (ix) will give Cannizzaro reaction DUE to absence of `alpha`-HYDROGE. (ii),(V),(VI) and (vii) will give aldol condensation due to presence of `alpha`- hydrogen. (iv) and (viii) will neither undergo Cannizzaro's reaction nor Aldol condensation because benzophenone does not give `alpha`-hydrogen and butanol is alcohol , not ALDEHYDE which cannot undergo aldol condensation. |
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| 7398. |
What is the difference between a double salt and a coordination compound ? OR Illustrate with example the difference between a double salt and a coordination compound. |
| Answer» Solution :`{:("Double SALT","Coordination compound"),("1. Double salts exist only in the solid state and dissociate into their constituent ions in the aqueous solutions.","1. Coordination compounds exist in the solid state as WELL as in the aqueous or non-aqueous solutions."),("2. Double salts LOSE their identity in the solution.","2. They do not lose their identity completely."),("3.The properties of double salts are same as those of their constituents.","3. The properties of coordination compounds are different from their constituents."),("4. Metal ions in the double salts show their normal VALENCE.","4. Mental ions in the coordination compounds show two valences namely primary valence and secondary valence satisfied by anions or neutral molecules called ligands."),("5. For example, in" K_(2)SO_(4)"."K_(2)SO_(4)"."Al_(2)(SO_(4))_(3)"."24H_(2)O". The ions " K^(+)","Al^(3+) and SO_(4)^(2-)" show their properties.","5. For example, in "K_(4)[Fe(CN)_(6)]",ions "K^(+) and [Fe(CN)_(6)]^(4-)"ions show their properties."):}` | |
| 7399. |
Two oxides of a metal contain 36.4% and 53.4% of oxygen by mass respectively. If the formula of first oxide is M_(2)O, then that of the second is |
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Answer» `M_(2)O_(3)` parts, i.e., 2 ATOMS of `M-=63.6` parts `"or1 ATOM of M = 31.8 parts"` 1 atom of O = 36.4 parts In 2nd oxide, oxygen present = 53.4 parts `therefore"M present = 46.6 parts"` 31.8 parts of M = 1 atom of M `"46.6 parts of M"=(1)/(31.8)xx46.6" parts = 1.5 atoms"` 36.4 parts of O = 1 atom of O `"53.4 parts of O"=(1)/(36.4)xx53.4=1.5" atoms"` `therefore" In 2nd oxide M : O" = 1.5:1.5=1:1` Hence, formula is MO Alternatively, if m is the atomic mass of M, For `M_(2)O,(16)/(14+16X)xx100=53.4` `or (16x)/(14+16x)=0.534 or 16x=.476+8.544x` or `7.456x=7.476 or x=1` Hence, the formula is MO. |
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| 7400. |
Uranium ultimately decays into a stable isotope of |
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Answer» Radium |
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