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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.
| 15701. |
Which is correct about physical adsorption? |
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Answer» HIGH TEMPERATURE and high pressure FAVOUR ADSORPTION. |
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| 15702. |
Which of the following has Frenkel defect? |
| Answer» Answer :C | |
| 15703. |
What are the limitations of valence bond theory? |
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Answer» Solution :In case of the coordination compounds, the valence bond theory has the following LIMITATIONS : (1) It cannot explain the spectral properties (colours) of the complex compounds. (2) Even if the magnetic MOMENTS can be calculated from the number of unpaired electrons, it cannot explain the magnetic moment arising due to orbital motion of electrons. (3) It cannot explain why the metal ions with the same oxidation state give inner complexes and OUTER complexes with different ligands. (4) In every complex, it cannot explain magnetic properties based on geometry of the complex. (5) Quantitative interpretations of THERMODYNAMIC and kinetic stabilities of the coordination compounds cannot be accounted. |
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| 15704. |
Total number of complexes among the following which are opticaly active? (i) [Cr(O x)_(3)]^(3-) (ii) cis-[Pt(Cl_(2))(en)] (iii) cis[Rh(Cl_(2))(NH_(3))_(4)]^(+) (iv) Ru(dipy)_(3)]^(3+) (v)cis[Co(NO_(2))_(3)(dien)] (vi) Trans-[Co(NO_(2))_(3)(dien)] (vii) cis[Co(NO_(2))_(3)(NH_(3))_(3)] |
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Answer» |
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| 15705. |
Which one of the following compounds when heated with KOH and a primary amine gives carbylamine test. |
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Answer» `CHCl_(3)` `RHN_(3)+CHCl_(3)+3 KOH("alc.")overset(Delta)rarrunderset("ALKYL isocyanide")(RNvec=C+KCl+3H_(2)O)` |
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| 15706. |
Which of the following ligand(s) can act as pi-acid ligand.? |
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Answer» `sigma`-cyclopentadienyl |
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| 15707. |
Which of the following is the anhydride of perchloric acid: |
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Answer» `Cl_2O` |
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| 15708. |
What are unit cells ? State its types. |
Answer» SOLUTION :The smallest part of space LATTICE of a crystal that SPECIFY the crystal completely is called unit cell.  The unit cell chosen in most general case has its sides PERPENDICULAR to each other and has shortest length and the ENTIRE crystal is generated by translational displacement of unit cell in 3D. The above figure shows movement of unit cell in 2D. In 2D, a parallelogram with side of length ..a.. and ..b.. and an angle r between these sides is chosen as unit cell. 
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| 15709. |
Two element X (At.mass=75)and Y (At. Mass=16) combine to give a compound having 75.8% of X. the formula of the compound is: |
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Answer» XY |
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| 15710. |
When phosphorus trichloride PCI_3(l) reacts with water, the products are |
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Answer» `PCl_(5) and H_(3)PO_(4)` |
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| 15711. |
Which of the following polymers is biodegradable ? |
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Answer» `(--CH_(2)-underset("CL")underset("|")"C"=CH-CH_(2)--)_(N)` |
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| 15712. |
Which of thefollowingcan beusedto distanguish propene frompropyne ? |
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Answer» ALK.`KMnO_(4)`<BR>`Br_(2)`water |
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| 15713. |
Write the structues of organic compound A to F in the following sequence of reactions : . |
Answer» SOLUTION : .
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| 15715. |
Write the IUPAC name the draw the structure of each of the following complex entities :3 (i) [Co({:(COO),(|""),(COO))_(3)]^(3-) (ii) [Cr(CO)_(6)] (iii) [PtCl_(3)(C_(2)H_(4))] (At.nos. Cr=25,Co,27, Pt=78) |
Answer» Solution :(i) Trioxalato Cobaltate (III)  (ii) Hexacarbonyl chromium (o)  (iii) Trichloridoethene platinum (IV) 
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| 15716. |
Which one is most metallic ? |
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Answer» P |
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| 15717. |
Which statement is wrong |
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Answer» Beryl is an EXAMPLE of CYCLIC SILICATE |
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| 15718. |
When the following aldohexose exists in its D-configuration, the total number of stereoisomers in its pyranose form, is {:(CHO),(|),(CH_(2)),(|),(CHOH),(|),(CHOH),(|),(CHOH),(|),(CH_(2)OH):} |
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Answer» |
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| 15719. |
The reagent with which both acetaldehyde and acetone react easily is : |
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Answer» FEHLING SOLUTION |
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| 15720. |
Which of the following compound can not show geometrical isomerism?1 |
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Answer»
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| 15721. |
What freezes out first when a solution of common salt is cooled? |
| Answer» SOLUTION :WATER as ICE. | |
| 15722. |
What is Sol ? |
| Answer» Solution :The colloidal SYSTEM of SOLID dispersed in liquid calleded .SOL.. | |
| 15723. |
Which is the characteristic of oxygen molecule? |
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Answer» diamagnetic with no-unpaired electron |
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| 15724. |
Which of the following term means pain killing? |
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Answer» Antibiotic |
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| 15725. |
Write the structures of the following compounds: (i) 2-Chloro-3-methylpentane (ii) 1-Chloro-4-ethylcyclohexane. (ii). 4-tert-butyl-3-iodoheptane (iv) 1-4-Dibromobut-2-ene. (v) 1-Bromo-4-sec-butyl-2-methylbenzene. |
Answer» SOLUTION :
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| 15726. |
Which of the following gives carbylamine reaction? |
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Answer» `CH_3 CONH_2` |
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| 15727. |
Which electronic configuration corresponds to minimum energy and maximum stability? |
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Answer» `(n-1) d^10 ns^1` |
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| 15728. |
The SRP for the different halogens is in the order of |
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Answer» `F GT Cl gt Br gt I` |
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| 15729. |
What type of change takes place when suger is dissolved in a cup of tea ? |
| Answer» Solution :When suger is dissolved in a cap of TEA , PHYSICAL change takes PLACE . | |
| 15731. |
When formaldehyde is treated with methanol in presence of dry HCI gas or fused CaCI_(2) it, yields: |
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Answer» ACETALDEHYDE |
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| 15732. |
Which of the following metals will not react dilute hydrochloric acid? |
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Answer» Cu |
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| 15733. |
Which of the following is a colloid ? |
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Answer» SUGAR solution |
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| 15734. |
When 0.01 moles of the following acids are dissolved in 1 L "of" H_(2)O, the [H^(+)] will be greatest in:- |
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Answer» `HNO_(2) , pka = 3.0` |
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| 15735. |
Vitamin C is chemically |
| Answer» Solution : Ascorbic acid. | |
| 15736. |
The standard heat of formation of NO_2(g) amd N_2O_4(g) are 8.0 2.0 kcal mol^-1 respectively. The heat of dimerization of NO_2 in kcal is: |
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Answer» 10 |
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| 15737. |
Which one is a natural linear polymer ? |
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Answer» COTTON |
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| 15739. |
Which of the following features of protein is not observed at the iso-electric point ? |
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Answer» MAXIMUM SOLUBILITY |
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| 15740. |
Which of the following can not evolve more than one gas (vapour) if heated in dry test tube. |
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Answer» `naNO_(3)(s)` |
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| 15741. |
Which of the following hydrogen halide is liquid at 273K? |
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Answer» HI |
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| 15742. |
Two particle A and B are in motion. If the wavelength associated with 'A' is 33.33 nm, the wavelength associated with 'B' whose momentum is 1//3^(rd) of 'A' is |
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Answer» `1.0 xx 10^(-8)` m `lamda_(A) = H//p_(A)`...(i) `lamda_(B) = (h)/(p_(A)//3) = (3h)/(p_(A))`...(II) From eq (i) and (ii), we get `(lamda_(A))/(lamda_(B)) = 1/3 RARR lamda_(B) = 33.33 xx 10^(-9) xx 3 =99.99 xx 10^(-9)` m `~~ 1.0xx10^(-7)` m |
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| 15743. |
t_((t)/(2)) of Th^(232) is 1.39xx10^(10) .Calculate alpha-particles omitted by 1 gm Th per sec. |
| Answer» SOLUTION :`4.104xx10^(3)` | |
| 15745. |
Which of the following has the maximum acidic strength |
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Answer» p-nitrophenol |
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| 15746. |
Which metal is used for filament of electric bulb? |
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Answer» Pt |
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| 15747. |
Units of ebullioscopic constant are K kg mol^-1 . |
| Answer» | |
| 15748. |
Which one of the following product is formed when propan-2-ol is treated with Cu at 573 K? |
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Answer» PROPANAL |
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| 15749. |
Which name is incorrect? |
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Answer»
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| 15750. |
What happens when NH_4Cl is heated withCa(OH)_2(equation only) ? |
| Answer» SOLUTION :`2NH_4Cl + CAO overset (Heat) RARR CaCl_2 + H_2O + 2NH_3 UARR` | |
