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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.
| 22051. |
Which of the following compounds gives ethyl alcohol with an enzyme zymase? |
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Answer» GLUCOSE |
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| 22052. |
Which of the following is a homogeneous system? |
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Answer» Suspension |
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| 22053. |
Which of the following can exhibit geometrical isomerism ? [Co(NH_(3))_(4)Cl_(2))] [Co(en)_(3)]Cl_(2) [Co(en)_(2)(NO_(2))aCl]SCN [Co(NH_(3)_(6)][Cr(CN)_(6)] |
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Answer» (i) , (II) , (iii) |
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| 22054. |
Which reagents are used in Balz Schieman reaction? |
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Answer» `phi-OH` and `CO_(2)` |
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| 22055. |
When acidulatd water (di. H_(2)SO_(4) solution) is electrolysed, will the pH ofthe solution be affected? Justify your answer. |
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Answer» Solution :PH of the solution will not be affected as `[H^(+)]` will remain the same. This is because the amount of `H^(+)` ions reduced is compensated by the `H^(+)` ions produced by oxidation of `H_(2)O`. At cathode: `2H^(+)+2e^(-)toH_(2),` At ANODE: `H_(2)Oto(1)/(2)O_(2)+2H^(+)+2e^(-)`. |
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| 22056. |
Which of the following can be used as artificial sweeteners ? |
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Answer» Aspartame |
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| 22057. |
When methane mixed with oxygen is passed through heated molybdenum oxide, the main product formed is : |
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Answer» methanoic acid `CH_(4)O_(2)overset("Mo-oxide")UNDERSET("catalyst") to underset("methanal") (HCHO)+H_(2)O` |
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| 22058. |
The vapour pressure of pure liquid A and pure liquid B at 20^(@)C are 22 and 75 mm of Hg respectively. A solution. |
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Answer» `"Vapour PRESSURE of liquid A in solution "(P_(A))=P_(A)^(@)x_(A)=(22mm)xx0.5=11mm` `"Vapour pressure of liquid B in solution "(P_(B))=P_(B)^(@)x_(B)=(75mm)xx0.5=37.5 MM.` `"Vapour pressure of the soution"P=P_(A)+P_(B)=(11+37.5)=48.5mm.` |
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| 22059. |
Which the following statements is wrong ? |
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Answer» An ACIDIFIED solution of `K_2Cr_2O_7` liberates iodine from iodides |
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| 22060. |
Which ofthe followingmetaloxide is whitein colour butbecomeyellow on heating |
| Answer» ANSWER :B | |
| 22061. |
Which is high spin complex: |
| Answer» Answer :D | |
| 22062. |
Which are hydrolysed by water |
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Answer» `XeF_2` |
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| 22063. |
Which of the following sequence is correct with reference to the oxidation number of iodine |
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Answer» `I_(2) gt I Cl lt HI gt HIO_(4)` |
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| 22064. |
Which of the following does not show positive deviation from Raoult's law? |
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Answer» BENZONE + chlorofor |
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| 22065. |
Write the IUPAC name of the following compound : H_(3)C-underset(CH_(3))underset("|")"C "=underset(Br)underset(|)C-CH_(2)-OH |
| Answer» SOLUTION :`UNDERSET("2-Bromo-3-Methylbut-2-en-1-ol")(H_(3)C-OVERSET("3")underset(CH_(3))underset("|")"C "=underset(BR)underset(|)overset("2")C-Coverset(1)H_(2)-OH)` | |
| 22066. |
Which one of the following alkaline earth metals has some similarities with aluminium ? |
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Answer» Ca |
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| 22067. |
Whichof the following pair of compounds are isomers- |
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Answer» `CH_(3)CH_(2)OH,CH_(3)OCH_(3)` |
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| 22068. |
What is the role of NaCN in the extraction of gold ? (ii) What is copper matte ? |
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Answer» SOLUTION :(i) It is USED as a COMPLEXING AGENT. (ii) It is a mixture of `Cu_(2)O " and " Cu_(2)S`. |
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| 22069. |
For the reaction, 2NH_3(g) iff N_2(g) + 3H_2(g) the units of K_p will be |
| Answer» Solution :Under a similar experimental CONDITIONS, the same EQUILIBRIUM will be established for a reversible reaction irrespective of whether the reaction in initiated with the reactants or the products. Thus for the reaction, `2NH_(3)(g) hArr N_(2)(g)+3H_(2)(g)`, the same percentages of `NH_(3) and (N_(2)+H_(2))` will be PRESENT at equilibrium as in the case of the reaction, `N_(2)(g) +3H_(2)(g)hArr 2NH_(3)(g)`. | |
| 22070. |
Which is a stronger acid, phenol or cresol? Explain. |
Answer» Solution :CRESOL is methylphenol. It has THREE positional isomers: o-cresol and p-cresol. Due to +I-effect of `CH_(3)` group, electron DENSITY in the O-H bond increases, therefore, it becomes difficult to break the O-H bond as compared to that in PHENOL and HENCE all cresols are less acidic than phenol or phenol is a stronger acid than cresols. 
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| 22071. |
Which element comes in 5th period of chalcogen group ? |
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Answer» Se `to (A)` Se and (B) Te are chalcogens `Se : (Ar) 3d^(10) 4s^(2) 4p^(4), therefore 4th` PERIOD `Te : (Kr) 4d^(10) 5s^(2) 5P^(4), therefore 5^(th)` period. |
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| 22072. |
Which of the following reactants in presence of AlCl_3 gives acetophenone ? |
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Answer» BENZENE and acetone |
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| 22073. |
Write four points of difference between properties of nitrogen and other element of group 15. Explain structure of CIF_(3). Conductivity of a solution is 6.23 xx 10^(-5) Omega^(-1) cm^(-1) and its resistance is 13710 Omega. If electrodes are electrode. Why is molality of a solution independent of temperature? |
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Answer» SOLUTION :(1) At ordinary temperature nitrogen is gas while other elements are solids. (2) Nitrogen exists as diatomic molecule but other elements of the group are tetra atomic. (3) Nitrogen has TENDENCY to form `p pi - p pi` BONDS but other elements form `p pi- d pi` instead of `p pi - p pi`. (4) Due to small size and high electronegativity nitrogen has tendency to form hydrogen bonds in hydride compounds but other compound are not. (5) Nitrogen shows wide range of oxidation state from -3 to + 5 but other elements not. Explain structure of `CIF_(3)` GROUND state of `._(17)Cl`  Cross-sectional ara of electrode: `K = (1)/(R ) xx (1)/(a)` `6.23 xx 10^(-5) = (1)/(13710) xx (0.7)/(a)` `a = 0.8196 cm^(3)` |
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| 22074. |
Which of the following compound has/have effective atomic number equal to the atomic |
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Answer» `K[Co(CN)_(4)]` |
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| 22075. |
The values of K_(f) for solvents P,Q,R and S are 1.86, 1.99, 5.12 and 4.7 kg mol^(-1) resp. The equimolal solutions of a solute in these solvents will have the freezing point in order of solvents |
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Answer» RgtSgtQgtP |
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| 22076. |
Which one of the following is an example for artificial sweetening agent? |
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Answer» BUTYL HYDROXY toluene |
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| 22077. |
The vapour pressure of pure liquid A and B are 520 mm and 1000 mm respectively at 80^(@)C temp. If the solution of A and B is boil at 80^(@)C temp. and I at pressure, what will be the % of A in the mixture ? |
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Answer» Solution :`P=P^(@)x_(A)+P^(@)x_(B)` `760=(520xx x_(A))+[1000(1-x_(A))]` `520xx x_(A)+1000-1000 x_(A)` `therefore x_(A)=0.5` `therefore %` mole `= 0.5xx100` = 50% |
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| 22078. |
Whatare thebiologicalfunctionof nucleicacids? |
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Answer» SOLUTION :(i) Energycarriers (ATP). (ii) Componentsofenzyme COFACTORS. Example, Co enzymeA, `NAD^(+)` ,FAD . (iii) CHEMICAL messenger. Example: Cylic AMP, CAMP. |
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| 22079. |
Which of the following processes involves the roasting process. |
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Answer» `ZnS+3O_(2) to 2ZnO+2SO_(2)` |
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| 22080. |
Which one of the following is expected to exhibit optical isomerism ? |
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Answer» TRANS-`[Co(en)_2Cl_2]` |
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| 22081. |
Which is strongest Lewis base |
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Answer» `SbH_(3)` |
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| 22082. |
Which of the following decolourises a hot alkaline KMnO_4 solution? |
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Answer» `CH_3 CH_2 CH_3` `(CH_(3))_(3) CH^+[OH] overset("hot")underset(KMnO_(4))(to) (CH_(3))_(3) COH` |
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| 22083. |
Which of the following compounddoes notreactwith alkalinebrome |
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Answer» `CH_(3)- OVERSET(NO_(2)) overset(|)(CH) - CH_(3)` |
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| 22084. |
Define the following terms. Pseudo first order reaction. |
| Answer» Solution :Inpseudo FIRST order reaction, the rate of the reaction only depends on the change in CONCENTRATION of the reacting species. The concentration of the other reacting species is so large that it does not change APPRECIABLY during the course of reaction.The ACID hydrolysis of ethyl acetate is an example of pseudo first order reaction.`CH_3COOH_2H_5HOHiffCH_3COOHC_2H_5OH`Rate`=K[CH_3COOC_2H_5]`The above example is a bimolecular reaction but the order of reaction is one:. | |
| 22085. |
Why boiling point of water is increased on addition of non-volatile solute into it? |
| Answer» Solution : This is because when a non-volatile SOLUTE is added to a volatile liquid solvent, its vapour pressure decreases and it has to be heated to a higher temperature so that its vapour pressure BECOMES equal to the atmospheric pressure. | |
| 22087. |
What from Freundich adsorption isotherm equation will take at high pressures ? |
| Answer» Solution :`x/m=k, i.e.,` it BECOMES INDEPENDENT of PRESSURE at CONSTANT temperature. | |
| 22088. |
Which of the following is called Wilkinson's catalyst? |
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Answer» `[Ph_(3)P)_(3)RHCL]` `TiCl_(4)+(C_(2)H_(5))_(3)Al` is Zeigler Natta catalyst. `(C_(2)H_(5))_(4)Pb` is an anti-knocking agent cis-platin is used as an anti-cancer |
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| 22089. |
What is spectrochemical series? |
| Answer» SOLUTION :The ARRANGEMENT of LIGANDS in order of their increasing CRYSTAL field splitting field strength. | |
| 22091. |
What are the conditions to be satisfied to exhibit Tyndall effect? |
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Answer» The REFRACTIVE indices of the dispersed phase and the DISPERSION MEDIUM must differ greatly in magnitude. |
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| 22092. |
Which compound corresponds van.t Hoff factor (i) to be equal to 2 in dulite solution? |
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Answer» `K_2SO_4` |
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| 22093. |
Which statement is improper for tetrachloro methane ? |
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Answer» When it comes in direct contact of SKIN, red rashes are FORMED. |
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| 22094. |
Write the name of the following ligands and classify their denticity (A)CH_(3)NC""(B)acac^(-1) ""(C ) N_(3)^(-) ""(D) "dien" "" ( E ) edta^(4-) (F) edta^(3-) ""(G)o x^(2-) "" (H) dmg^(-1) "" (I) NC^(-) "" (J) NO_(2)^(-) (K) O^(2-) ""(L)O_(2)^(-) |
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Answer» Solution :(A) METHYL isocyanide, MONODENTATE, (B) acetylacetonato, bidentate ( C) azido, monodentate (D) dithylenetriamine, tridentate ( E) ethylenediamind tetraacetato, hexadentate (F) ethylenediamine triacentato, pentadentate (G) oxolato, bidentate (H) DIMETHYLGLYOXIMATO (I) isocyanido,monodentate (J)nitrito,monodentate (K) oxido, monodentate (L) superoxide, monodentate |
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| 22095. |
Which of the following represents the fuming sulphuric acid (oleum or pyrosulphuric acid ) ? |
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Answer» `H_(2)S_(2)O_(4)` |
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| 22096. |
The relationship between rate constantand halflife periodof zero order reaction is give by |
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Answer» `t_(1//2)=[A_(0)]2K` `t_(1//2)=([A_(0)])/(2K)` where `[A_(0)]` is the initial concentration and k= rate constant for zero order reaction |
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| 22097. |
Which is the correct structural formula hydroxy benzoic acid (salysilic acid) ? |
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Answer»
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| 22098. |
Which of the following orbitals are filled progressively in the transition elements |
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Answer» s |
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| 22099. |
The vapour pressure of water is 17.5 mm at 20^(@)C temp. what is the vapour pressure of solution 20^(@)C prepared by dissolving 18 gram glucose in to 178.2 gram water at 20^(@)C temp. ? |
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Answer» <P>17.675 mm `(P_(1)^(@)-P_(1))/(P_(1)^(@))=(M_(1)w_(2))/(M_(2)w_(1))` `(17.5-P_(1))/(17.5)=(18xx18)/(180xx178.2)` `P_(1)=17.325 mm` |
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| 22100. |
Which of the following is natural polymer. Buna-S Protein, PVC ? |
| Answer» Solution :Starch is NATURALLY occurring POLYMER . | |
