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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.
| 16751. |
Which one of the following carbohydrates will show mutarotation? |
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Answer» Sucrose |
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| 16752. |
Whichof thefollowingcannotbeconsidered as amechansticstepin cahainreactionof methanewith Cl_(2) ? |
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Answer» `Cl_(2) toCl^("*")` |
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| 16753. |
Which of the following are secondary bromides ? |
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Answer» `(CH_(3))_(2)CHBR` 
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| 16754. |
Write the IUPAC name of CH_(3)-underset(NH_(2))underset(|)(CH)-CH_(2)-CHO |
| Answer» SOLUTION :3-Aminobutanal. | |
| 16755. |
Which indicator can be used in the titration of strong acid and strong base |
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Answer» Only phenoplphthalein |
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| 16756. |
What is the half-life period of a reaction having rate constant 6.93xx10^(-4) sec^(-1). |
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Answer» SOLUTION :Half-life PERIOD `T_(1/2)=0.693/(LAMBDA)=0.693/(6.93xx10^-4)=10^3sec` |
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| 16757. |
Which of the following reagents can be used for separating a mixture of ehter and alkyl halide ? |
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Answer» Dil. `H_2SO_4` |
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| 16758. |
Which of the following does not refer to the principle forms of carbohydrate present in our food? |
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Answer» fructose |
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| 16759. |
Transition metals are placed in tlhe long form of periodic tabe between |
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Answer» `3^(nd)` and `4^(TH)` group |
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| 16760. |
When orthophosphoric acid is strongly heated the product formed is |
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Answer» PHOSPHINE `PH_3` |
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| 16761. |
Which of the following is an example of covalent solid ? |
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Answer» Silicon carbide |
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| 16762. |
Which of the following compound can be used as antifreeze in automobile radiators? |
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Answer» methanol |
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| 16763. |
What is the "coagulation" process? |
| Answer» Solution :The PROCESS by means of which the particles of the dispersed phase in a sol are precipitated is called coagulation. It is generally ACHIEVED by neutralizing the CHARGE on colloidal particles by the addition of a suitable solvent. | |
| 16764. |
To neutralize completely 20 mL of 0.1M aqueous solution of phosphorus acid (H_(3)PO_(3)) the volume of 0.1M aqueous KOH solution required is |
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Answer» 40 mL `underset(("Acid"))(N_(1)V_(1))=underset(("Base"))(N_(2)V_(2))` `(0.2 N)xx20 mL)=(0.1N)xxV_(2)` `V_(2)=((0.2N)xx(20ML))/((0.1N))=40 mL.` |
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| 16766. |
Which readily liberates I_(2) from KI in acidic medium |
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Answer» `PO_(4)^(3-)` |
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| 16767. |
Which of the following does not undergo Aldol condensation ? |
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Answer» `Cl-CH_(2)-CHO` |
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| 16768. |
Which of the following statements is (are) incorrect? (i) Percentage ionic character in CsCl bond is ~55%. (Electronegativity values of Cs and Cl are 0.7 and 3.0 respectively) (ii) From H_(2)O to H_(3)O^(+), the geometry around O atom changes drastically . (iii) The most stable oxidation state for element with atomic number 113 is expected to be +2. (iv) The 2^("nd") ionization energy of Ca is greater than 1^("st") ionization energy of it but lower then 2^("nd") ionization energyof K. |
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Answer» Only i |
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| 16769. |
The reagent used in the Wolff-Kishner reduction is |
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Answer» Zn-hg and conc HCl |
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| 16770. |
Using IUPAC norms, write the formulae of the following : (i) Tetrahydroxozincate (II) (vi) Hexaamminecobalt (III) sulphate (ii) Potassium tetrachloridopalladate (II) (vii) Potassium trioxalatochromate (III) (iii) Diamminedichloridoplatinum (II)(viii) Hexaammineplatinum (IV) (iv) Potassium tetracyanonickelate (II) (ix) Tetrabromidocuprate (II) (v) Pentaamminenitrito-O-cobalt (III) (x) Pentaamminenitrito-N-cobalt (III) |
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Answer» Solution :(i) `[Zn(OH)_(4)]^(2-)` (II) `K_(2)[PdCl_(4)]` (III) `[Pt(NH_(3))_(2)Cl_(2)]`(iv) `K_(2)[Ni(CN)_(4)]` (v) `[Co(NH_(3))_(5)(ONO)]^(2+)` (vi) `[Co(NH_(3))_(6)]_(2)(SO_(4))_(3)` (vii) `K_(3)[Cr(C_(2)O_(4))_(3)]` (viii) `[Pt(NH_(3))_(6)]^(4+)`(ix) `[CuBr_(4)]^(2-)` (x) `[Co(NH_(3))_(5)(NO_(2))]^(2+)` |
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| 16771. |
Very pure hydrogen (99.9%) can be made by which of the followingprocesses ? |
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Answer» REACTIONOF SALT like hydrides with water |
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| 16772. |
The solvent which neither accepts proton nor donates proton is called |
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Answer» Amphoteric |
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| 16773. |
Which polymer is used in preparation of carpet ? |
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Answer» PVC |
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| 16774. |
What is starch? What are the ultimate hydrolysis products? |
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Answer» Solution :(i) Starch is a polysaccharide in which a LARGE NUMBER of monosaccharide UNITS are linked to each other by oxide bridges and these linkages are called glyosidic linkages. General FORMULA of starch is `(C_(6)H_(10)O_(5)_(n)`. (ii) It is a white amorphous substance with no taste or smell. (iii) Starch get hydrolysed to monosaccharides. `underset("Starch")((C_(6)H_(10)O_(5))_(n))+nH_(2)Ooverset(H^(+))rarrunderset("GLUCOSE")(nC_(6)H_(12)O_(6))` |
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| 16775. |
What is carbylamines test for 1^(@) amine? |
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Answer» Solution :Carbylamine TEST: When `1^(@)` AMINE is heated with `CHCl_(3)` and alcoholic KOH solution, an isocyanide or carbylamine is produced. This reaction is called carbylamine test for `1^(@)` or primary amines. e.g `underset("ETHYLAMINE")(C_(2)H_(5))-NH_(2)CHCl_(3)to+3KOH (alc) overset(Delta)to underset("Ethyl carbylamine")(C_(2)H_(5)-NC)+3KCI+3H_(2)O` |
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| 16776. |
Which of the following Lewis structures are valid resonating structuresfor the azide ion? |
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Answer» `:OVERSET(..)(N)overset(o+)(-)UNDERSET(..)overset(..(N)-overset(..)(N):` |
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| 16777. |
Which of the following statement is correct: |
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Answer» KI is added into `I_(2)`to increase its SOLUBILITY in water |
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| 16778. |
Which one is weak antiseptic ? |
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Answer» DILUTE solution of BORIC acid |
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| 16779. |
What is the coordination number of octahedral voids? |
| Answer» SOLUTION :The C.N. of an OCTAHEDRAL VOID is 6. | |
| 16780. |
Which of the following can be used as an antacid ? |
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Answer» Ranitidine |
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| 16781. |
Write the optical properties of colloids with diagram. |
Answer» Solution :(i) Colloids have OPTICAL property. When a homogeneous solution is seen in the DIRECTION of light, it appears clear but it appears DARK, in a perpendicular direction. (ii) But when light passes through colloidal solution, it is scattered in all directions. (iii) This effect was first observed by Faraday, but investigations are made by Tyndall in detail, HENCE CALLED as Tyndall effect. 
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| 16782. |
Which of the following complex is used for treatment of cancer ? |
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Answer» `K_4[Fe(CN)_6]` |
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| 16783. |
Which is an example of thermo setting polymer |
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Answer» Polythene |
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| 16784. |
Which one of the following statements is not true regarding ( +) Lactose ? |
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Answer» On hydrolysis , (+)lactose gives equal amount of D(+) GLUCOSE and D(+) GALACTOSE . |
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| 16785. |
The unit of K for pseudo first order reaction is |
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Answer» `"MINUTE"^(-1)` |
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| 16786. |
Which one of the following is used as selective reducing agent in the conversion of cyanide to aldehyde? |
| Answer» Solution : DIBAL-H | |
| 16787. |
What is chromatography? |
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Answer» Solution :• The chromatographic technique is a PROCESS of separation of components in a mixture which is mainly BASED on adsorption of components on the surface of adsorbents. • This method is very effective and used for identification, detection and estimation of many SUBSTANCES even if they are CONTAINED in micro QUANTITIES. |
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| 16788. |
What is a primary cell? Give an example. |
| Answer» Solution :A primary cell is the cell in which the REDOX reactio OCCURS only once and the cell becomes DEAD after some time. It cannot used again. | |
| 16789. |
Which reactants are involved in Mendius reaction ? |
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Answer» RCN and `Na//C_(2)H_(5)OH` |
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| 16790. |
Which shows sp^3-hybridisation: |
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Answer» `ClO_2^-` |
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| 16791. |
When I_(2) is dissolved in C C l_(4) the colour that result is |
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Answer» BROWN |
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| 16792. |
Whichof the followingstatementsare trueabout HCOOH ? |
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Answer» Itis STRONGER acid than `CH_(3)COOH` |
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| 16793. |
Which statement is true |
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Answer» `C_(6)H_(5)OH` is more acidic than `C_(2)H_(5)OH` 
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| 16794. |
The value of disintegration constant of radioactive isotope |
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Answer» Decreases with increasing TEMPERATURE |
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| 16795. |
What is Activation Energy (E_(a))?Explain graph of reaction of activation energy and write about its probability. |
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Answer» Solution :The energy required to form the intermediate,called activated complex (C ).Is known as activation energy `(E_(a))` or The MINIMUM energy required to convert reactant to the product is called KINETIC energy of reaction. Explanation of activation energy with the help of graph 2 mole.HI is formed by the reaction of 1 MOL `H_(2)` with 1 mole `I_(2)` `H_(2(g))+I_(2(g))to2HI_((g))` According to Arrhenius ,this reaction can take place only when amolecule of hydrogen and a molecule of iodine collide to form an ustable intermediate. It EXISTS for a very short time and then breaks up to form two molecules of Hydrogen iodide.  The energy required to form this intermediate called activated complex (C ) ,is known as activaition energy `(E_(a))`  Activated Energy `(E_(a))`= (Potential energy of intermediate complex (C))-(Potential energy of reactants) The probability of reaction and `E_(a)` (i)The COLLISION of molecules with more kinetic energy than `E_(a)` result into product (ii)The collision of molecules with less kinetic energy than `E_(a)` do not form product. (iii)`E_(a)ge` energy of collide -molecule than product will form . (iv)According to Arrhenius energy of activation and rate of reaction is related as `k=Ae^((-E_(a))//(RT))` and In k=In A-`(E_(a))/(RT)` |
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| 16796. |
Which of the following has lowest boiling point ? |
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Answer» HF |
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| 16797. |
Which polymer is generally used in carry bag? |
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Answer» Polyester |
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| 16798. |
Which of the following polymers soften on heating and harden on coolong ? What are the polymers with this property collectively called ? What are the structural similarities between such polymers ? Bakalite , urea - formaldehyde resin , polythene, polyvinyls , polystyrene. |
| Answer» Solution :Polythene , POLYVINYLS (PVC , teflon , acrilan , ETC.) polystyrene soften on heating and harden on coolong. Such polymers are called thermoplastic polymers. These polymers are linear or slightly branched long chain molecules. Their intermolecular forces of attraction lie in between those of elastomers and fibres. BAKELITE and urea -FORMALDEHYDE , on the other hand , are thermosetting polymers , These cannot be remelted and reworked. | |
| 16799. |
Which phenomenon will occur when water is added to anhydrous Calcium Chloride ? |
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Answer» ABSORPTION |
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| 16800. |
The typical animal glycolipids is |
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Answer» lecithin |
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