InterviewSolution
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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.
| 5502. |
Which of the following will change the colour of cold dil. Alkaline KMnO_(4) ? |
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Answer» `CH_(2)=CH_(2)` |
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| 5503. |
Toluene when treated with Br_(2)//Fe, gives p-bromotoluene as the major product because the methyl group |
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Answer» is PARA directing |
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| 5504. |
Which of the following are match : {:((A)"Lyophilic colloids",-,"reversible sols"),((B)"Associated collides",-,"micelles"),((C )"Tyndall effect",-,"scattering of light by colloidal particle"),((D)"Electrophoresis",-,"movement of dispersion medium under the influence of electric field") :} |
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Answer» |
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| 5505. |
which of the following correct set of name reaction : (a) Hoffmann's bromamide |
| Answer» Answer :D | |
| 5506. |
The structural feature which distinguishes proline from alpha - amino acids is that |
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Answer» It is OPTICALLY inactive |
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| 5508. |
Which of the folllowing gives the charge of an electron ? (N_A to " avegadro numbers") |
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Answer» `(1F)/(1N_(A))` |
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| 5509. |
Which one of the following is known as Baeyer's reagent? |
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Answer» COLD DILUTE ALKALINE `KMnO_(4)` |
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| 5510. |
What is a ligand ? Give example of bidentate ligand. |
| Answer» Solution :Ligands : The neutral molecules or negatively charged anions (or rarely POSITIVE IONS) which are bonded by coordinate BONDS to the central METAL ATOM or ion in a coordination compound are called ligands or donor groups. For example in `[Cu(CN)_(4)]^(2-),` four `CN^(-)` ions arre ligands coordinated to central metal ion `Cu^(2+)`. | |
| 5511. |
Which of the following compounds reacts slower than benzene in eleetrophilic substitution ? |
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Answer»
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| 5512. |
What weight of the non-volatile solute urea needs to be dissolved in 100 g of water, in order to decrease the vapour pressure of water by 25% ? What will be the molality of the solution. |
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Answer» |
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| 5513. |
Which of the following pairs of compounds are position isomers? |
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Answer» Isobutyl CARBINOL and s -butyl alochol |
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| 5514. |
What is the co-ordination number of Ca^(2+) andF^(-)ions in CaF_2 lattice ? |
| Answer» SOLUTION :`C.N. ofCa^(2+)=8``C.N.of F^-=4` | |
| 5515. |
Why can't rectified spirit be converted into absolute by simple distillation? |
| Answer» SOLUTION :Rectified spirit CONTAINING 95% ETHYL alcohol 5% water FORMS an azeotropic mixture which distils at a constant TEMPERATURE of 351.1 K. | |
| 5516. |
Which of the following lanthanoid ions is diamagnetic ? (At nos . Ce = 58 , Sm = 62, Eu = 63 , Yb =70) |
| Answer» Answer :D | |
| 5517. |
What happens when methanal is treated with methyl megnesium bromide and thenhydrolysed? |
Answer» SOLUTION :Propan-2-ol is FORMED. 
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| 5518. |
When vinyl chloride is passed through alcoholic KOH solution: |
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Answer» It DISSOLVES |
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| 5519. |
Which of the following statements is not correct regarding ozone? |
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Answer» It is light BLUE colour having PUNGENT odour |
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| 5520. |
Water and chlorobenzene are immiscible liquids.Their mixture boils at 90^@C under a reduced pressure of 7.82 xx 10^4 Pa. The vapour pressure of pure water at 90^@C is 7.03 xx 10^4 Pa. On weight per cent basis, chlorobenzene in the distillate is equal to (mol. wt. of chlorobenzene is 112.5 g "mol"^(-1)) |
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Answer» 50 `p_(H_2O) + p_(C_6H_5Cl)=7.82xx10^4` Pa `p_(H_2O) = 7.03xx10^4` Pa `therefore p_(C_6H_5Cl)=0.79xx10^4` Pa `p prop n prop w/m , therefore (w_(C_6H_5Cl)xxM_(H_2O))/(w_(H_2O)xxM_(C_6H_5Cl))=p_(C_6H_5Cl)/p_(H_2O)` `w_(C_6H_5Cl)/w_(H_2O)=(p_(C_6H_5Cl)xxM_(C_6H_5Cl))/(p_(H_2O)xxM_(H_2O))=((0.79xx10^4)xx112.5)/((7.03xx10^4)xx18)`=0.70 Weight per CENT of chlorobenzene is distillate `=0.70xx100` = 70 |
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| 5521. |
Which of the following is the unit cell dimensions of K_2Cr_2O_7 ? |
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Answer» `a NE b ne C , alpha ne BETA ne gamma ne 90^@` |
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| 5522. |
Which of the following will be most effective in causing the coagulation of a colloidal system in which particles move towards the cathode in an electric field? |
| Answer» Answer :C | |
| 5523. |
Which of the following set is incorrect ? |
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Answer» `NI(CO)_4` -- Tetrahedral, paramagnetic |
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| 5524. |
Which of thefollowingreactionis notoccur in aniline |
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Answer» BROMINATION |
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| 5525. |
Write general equation of reaction and explain -what is order of reaction?which is its value? |
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Answer» Solution :General reaction:aA+bB`to`cC+dD The differential rate expression of reaction is as under. Rate=`-(d[R])/(dt)=k[A]^(x)[B]^(y)` Where ,the value of x and y are DETERMINE experimentally which are same or not a and b. where x and y indicate how sensitive the rate is to the change in concentration of A and B. (i)x represent the order with respect to the reactant A. (ii)y represent the order with respect to the reactant B. (III)(x+y)=Overall order of a reaction . Order of reaction:The sum of power of the concentration of the reactants in the rate law expression is callled the order of that CHEMICAL reaction. Order of a reaction can be 0.1,2,3 and even a fraction ,these value are ALWAYS determined by experimentally. |
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| 5526. |
Which staements is incorrect about peptide bond ? |
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Answer» `C-N` bond length in proteins is longer than usual bond length of `C-N` bond |
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| 5527. |
What is meant by coordination sphere? Give example. |
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Answer» SOLUTION :The complex ion at the coordination compound containing the CENTRAL metal atom / ion.and the ligands attached to it, is COLLECTIVELY called coordination SPHERE and are usually enclosed in square BRACKETS with the net charge. For e.g, The coordination compound`K_(4)[Fe(CN)_(6)]` contains the complex ion`[Fe(CN)_(6)]^(4-)`is referred as coordination sphere. |
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| 5528. |
What are general characteristics of solids ? |
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Answer» Solution :(i) SOLIDS have definite VOLUME and shape. (ii) Solids are rigid and incompressible. (iii) Solids have strong cohesive forces. (iv) Solids have SHORT interatomic, ionic (or) molecular distances. (V) Their CONSTITUENTS (atoms, ions or molecules) have fixed positions and can only oscillate about their mean positions. (vi) Unlike gases, in solids, the atoms, ions (or) molecules are held together by strong force of attraction. |
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| 5529. |
To avoid the water product CaSO_4super-phosphate is changed into |
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Answer» Monophosphate |
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| 5530. |
What is the equivalent weight of KH(IO_(3))_(2) as an oxidant in presence of 4.0 (N) HCl when Icl becomes the reduced form ? (K=39.0, I=127.0). |
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Answer» Solution :In `KH(IO_(3))_(2),IO_(3)` is present as `IO_(3)^(-)`. OXIDATION state of I will be `x-6=-1 or x=+5` `overset(+5)(KH(IO_(3))_(2))RARR overset(+1)(2ICl)` Decrease in oxidation state `=10-2=8` `therefore"Equivalent wt. of "KH(IO_(3))_(2)=("MOL. wt.")/(8)=(39+1+2(127+48))/(8)=48.45` |
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| 5531. |
whichof thefollowingin INCORRECT ? |
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Answer» VAPOURPRESSUREOF aliquidincreases withincrease in TEMPERATURE |
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| 5532. |
Which species is most likely to lose a position (beta^(+))? |
| Answer» Answer :A | |
| 5533. |
Which one is most reactive towards nucleophilic addition reaction ? |
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Answer» `"CC"l_3-CHO` |
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| 5534. |
Which is industrially prepared by the electrolysis of aqueous NaCl ? |
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Answer» `Na_2CO_3` |
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| 5535. |
When a solution for specific conductance 1.342 ohm^(-1)"metre"^(-1) was placed in a conductivity cell wil parallel electrodes, the resistance was found to be 170.5 ohm. Area of electrodes is 1.86xx10^(-6)cm^2. Calculate separation of electrons ? |
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| 5536. |
Which of the following pair of transitional elements exhibit highest and lowest density |
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Answer» OS and SC `Os=22.60gm//cm^(3)` `Sc=3.01 gm//cm^(3)` |
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| 5537. |
What is most electropositive halogen? |
| Answer» SOLUTION :IODINE(I), Because ELECTRONEGATIVITY of HALOGENS DECREASES in order FgtClgtBrgtI | |
| 5538. |
Which of the following compounds is stable ? |
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Answer»
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| 5539. |
Volume occupied by single CsCl ion pair in a crystal is 7.014 xx 10^(-23) c^(3). The smallest Cs-Csinternuclear distance is equal to length of the side of the cube corresponding to volume of one CsCl ion pair. The smallest Cs to Cs internuclear distance is nearly |
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Answer» 4.4Å `7.014xx10^(-23)CM^(3)=a^(3)` ( a = edge LENGTH) `a= root3(7.014xx10^(-23))` `a=4.12xx10^(-8)cm=4.12 Å ~~4Å` |
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| 5540. |
Which of the following is not a thermoplastic ? |
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Answer» POLYTHENE |
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| 5541. |
Which one of the following solutions will have highest osmotic pressure? (Assume that all the salts are equally dissociated)? |
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Answer» `0.1 M Al_(2)(SO_(4))_(3)` |
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| 5542. |
Which of the following nformation can be obtained on the basis of Le-chatelier's principle |
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Answer» Entorpy CHANGE in a reaction |
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| 5543. |
Which of the following is correct order of dipole moment ? |
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Answer» `NH_(3) GT NF_(3)` |
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| 5544. |
when treated with conc. H_(2)SO_(4) and heated produces A. A when treated with base oversetΘOH produces B and consequent heating produces C: |
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Answer»
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| 5545. |
Which two of the following salts are used for preparing iodized salt?(i)KIO3(ii)KI(iii)I2(iv)HI |
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Answer» I and II |
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| 5546. |
Which of the following combines with Fe(II) ions to form a brown complex ? |
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Answer» `N_(2)O` |
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| 5547. |
Which among MeX, RCH_(2)X, R_(2)CHX and R_(3)CX is most reactive towards S_(n^(2)) reaction? |
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Answer» `MeX` |
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| 5548. |
What happens when methyl cyanide reacts with LiAlH_4 ? |
| Answer» SOLUTION :`CH_3-C EQUIV N+4H OVERSET(LiAlH_4)RARR CH_3CH_2NH_2` | |
| 5549. |
The relation between DeltaG and E for a cell is DeltaG=-nFE, the cel reaction will be spontaneous if |
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Answer» G is NEGATIVE |
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| 5550. |
Which is incorrect ? |
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Answer» `NaltAlltMgltSiIP_(1)`ORDER |
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