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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.
| 10101. |
Write the IUPAC name of the CH_3- CH_2-O- underset(CH_3)underset(|)CH-CH_2-CH_3 |
| Answer» SOLUTION :2-Ethoxybutane | |
| 10102. |
Which of the following does not give Liebermann's nitroso reaction? |
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Answer» a.`PhOH` |
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| 10103. |
Which of the following complexes is an inner orbtial complex ? |
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Answer» `[FeF_6]^(3-)` |
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| 10104. |
Which of the following group will increase more acidity of acetic acid ? |
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Answer» `- NO_(2)` |
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| 10105. |
Which of the following compounds is not yellow coloured ? |
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Answer» `(NH_(4))_(3)["As "(Mo_(3)O_(10))_(4)]` |
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| 10106. |
What is McAfee process? |
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Answer» SOLUTION :ALUMINIUM cloride is obtained by HEATING a mixture of alumina and coke in a current of chloride. `underset(("Alumina"))(Al_(2)O_(3))+3C+3Cl_(2)tounderset(("Aluminium Chloride"))(2AlCl_(3))+3CO_(2)` |
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| 10107. |
Which one of the following orders is not in accordance with the property stated against is ? |
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Answer» `HI gt HBr gt HCl gt Hf`: ACIDIC property in water The correct order is : `[Cl_2 gt Br_2 gtF_2 gtI_2]` |
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| 10108. |
Which of the following amino acids possesses a non polar side chain |
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Answer» ISOLEUCINE |
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| 10109. |
The vapour pressure of a solution of a non-volatile electrolyte (B) in a solvent (A) is 95% of the vapour pressure of the solvent at the same temperature. If the molecular weight of the solvent is 0.3 times the molecular weight of solute, the weight ratio of the solvent and solute are: |
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Answer» 0.12 |
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| 10110. |
Write the balanced chemical equations for the following : (a) Pb_(3)O_(4) is treated with nitric acid. (b) Zinc oxide is treated with excess of sodium hydroxide solution. (c) Dilute nitric acid is slowly reacted with metallic tin. (d) Gold is dissolved in aqua regia. (e) Iron reacts with cold dilute nitric acid. (f) Sodium thiosulphate is added slowly to silver nitrate. (g) Heating of ZnCI_(2).2H_(2)O. |
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Answer» SOLUTION :(a) `Pb_(3)O_(4)` is a mixed oxide, `2PbO.PbO_(2)`. With NITRIC acid PbO is converted to `Pb(NO_(3))_(2)` while `PbO_(2)` remains as such. `Pb_(3)O_(4) + 2HNO_(3) rarr PbO_(2) + Pb(NO_(3))_(2) + H_(2)O` (b) ZnO is dissolved as zincate ion. `ZnO + 2NaOH rarr Na_(2)ZnO_(2) + H_(2)O` (C) Tin reduced nitric acid (dilute) to ammonia. `4Sn + NO_(3)^(-) + 10 H^(+) rarr 4 Sn^(2+) + NH_(4)^(+) + 3H_(2) O` (d) Gold DISSOLVES in aqua regia as `HAuCI_(4)`. (e) `4Fe + 10 HNO_(3) rarr 4Fe (NO_(3))_(2) + NH_(4)NO_(3) + 3H_(2)O` (f) White precipitate changes to yellow, brown and finally becomes black. `{:(S_(2)O_(3)^(2-) + Ag^(+) rarr underset(("White"))(Ag_(2)S_(2)O_(3))),(Ag_(2)S_(2)O_(3) + H_(2)O rarr underset(("Black"))(Ag_(2)S) + H_(2)SO_(4)):}` (g) `ZnCI_(2).2H_(2)O overset(Delta)rarr ZnCI(OH) + HCI + H_(2)O` |
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| 10111. |
Which of the following properties is/are truefor thermoplastics? |
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Answer» The intermolecular FORCES of attraction are INTERMEDIATE between ELASTOMERS and fibres |
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| 10112. |
Which one of the following is NOT correct for transition state theory |
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Answer» the REACTANTS are FIRST CONVERTED to an activated complex. |
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| 10113. |
Which of the following is false statement for amorphous solid ? |
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Answer» It melts in higher TEMPERATURE ranges. |
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| 10114. |
The unit cell of tungsten is a face-centred cube having a volume of 31.699 A3. The atom at the centre of each face just touches the atoms at the corners. Calculate the radius and atomic volume of tungsten. |
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Answer» |
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| 10115. |
What is the difference between antibiotic and sulfa drugs? Give one example of each. |
| Answer» Solution :Antibiotics are metabolic products of some specific ORGANISMS WHEREAS sulfa drugs are CHEMICALLY synthesised. An important example of an antiobiotic is CHLORAMPHENICOL and that of a sulfa DRUG is sulfadiazine. | |
| 10116. |
Which of the following statement is not correct for nucleophilic substitution reaction ? |
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Answer» correct DECREASING order for `S_(N)1` reactivity is`(CH_(3))_(3)C-Clgt(CH_(3))_(2)CHClgtCH_(3)CH_(2)Cl` |
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| 10117. |
The total number of stereoisomeric forms of C_(6)H_(6)Cl_(6) known is |
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Answer» 6 |
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| 10118. |
The temperature above which a gas cannot be liquified even on application of high pressure is called |
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Answer» BOILING point |
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| 10119. |
In a copper voltmeter, mass deposite in 30 seconds is 'm' gram. If the time-current graph is as shown in figure. ECE of copper is |
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Answer» Z = m |
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| 10120. |
The total possible number of optically inactive isomers of the complex [Pt(NH_(3))_(2)FClBrI] would be : |
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Answer» 6 Total 9 G.I. out which 3 are TRANS and optically inactive and 6 are optically ACTIVE. |
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| 10121. |
Which of the following compounds gives a secondary amine on reduction ? |
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Answer» Nitromethane |
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| 10122. |
Which of the following is chalcopyrite ? |
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Answer» `CuFeS_(2)` Fool's gold : `FeS_(2)` Camalite : `KMgCl_(3). 6H_(2)O` Bauxite : `Al_(2)O_(3). 2H_(2)O` |
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| 10123. |
What volume of hydrogen and oxygen would be obtained at 27^@C and 740 mm of Hg by passing a current of 25 amperes through acidulated water for 24 hours? 10 g fairly concentrated solution of CuSO_4 is electrolýsed by passing 10 ampere current for 1.5 minutes calculate. (a) The weight of resulting solution (b) The number of equivalents of acid or alkali produced in solution (Cu =63.5) |
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Answer» |
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| 10124. |
Which one of the following doesn't produce metallic sulphide with H_(2)S ? |
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Answer» `ZnCl_(2)` |
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| 10125. |
Which gas is produced when common salt reacts with conc. H_2 SO_4 ? |
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Answer» Solution :HCL gas is produced. `NaCl + H_2SO_4 OVERSET(420 K) rarr NaHSO_4 + HCl` `2NaCl + H_2SO_4 overset(823 K) rarr Na_2 SO_4 + 2HCL` |
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| 10126. |
Write the reaction involved in the following : Friedal-Crafts Alkylation of Phenol |
| Answer» SOLUTION :AWARD one mark if ATTEMPTED in any way. | |
| 10127. |
Write the chemical reaction occuring in the preparation of fluorobenzene from aniline. |
Answer» SOLUTION :
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| 10128. |
Who among the following scientists synthesized prontosil in 1932? |
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Answer» H.W. Flory |
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| 10129. |
Which is more basic among benzyl amine and aniline? |
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Answer» Solution :Benzyl amine is a stronger base than aniline. In aniline, lone pair is in conjugation with BENZENERING the not in free state.  In benzyl amine, the lone pair is in SIDE CHAIN and not in conjugation with the BENZENE ring. Hence it is in free state and can DONATE the electron pair easily. |
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| 10130. |
The structure that refers methyl phenyl carbinol is ________. |
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Answer» `C_(6)H_(5)CH_(2)OH` |
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| 10131. |
Which of the following is general electronic configuration of Actinide series? |
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Answer» `[Rn] 5f^(0-14) 6d^(0-2) 7S^(2)` |
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| 10132. |
What are used of Urotropine? Give its structure. |
Answer» Solution : This is the STRUCTURE of UROTROPINE (Hexamethylene tetramine) (i) Urotropine is used as a medicine to treat URINARY INFECTION. (II) Nitration of Urotropine under controlled condition gives an explosive RDX (Research and development explosive). It is also called cyclonite or cyclotri methylene trinitramine. |
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| 10133. |
When propyne is treated with aqueous H_2SO_4 in presence of HgSo_4 the major product is : |
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Answer» Propanal |
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| 10134. |
What are the evidence in favour of dual behaviour of electron? |
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Answer» Solution :The particle nature of ELECTRON can be explained by the plained by the photoelectric effect and Planck's Quantum Theory . When light falls on the surface of a metal , electrons are ejected from the surface with some kinetic energy by absorbing energy in the form of quantum . The kinetic energy of photo electrons is directly proportional to frequency . Kinetic energy of photoelectrons is INDEPENDENT of intensity because increase energy does not affect the energy of photons rather it simply increases the number of photons falling on the surface of metal and hence the number of photo-electrons . This proves the particle nature of electrons. The wave nature of electrons was verified EXPERIMENTALLY by Davisson and Germer by carrying out diffraction EXPERIMENTS with a beam of fast moving electrons . This wave nature of electrons is utilised in the construction of electron MICROSCOPE. From the evidences of photoelectric effect in favour of particle nature and also from the evidences of experiments conducted by Davisson and Germer in favour of wave nature , we can conclude that electron has dual nature . |
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| 10135. |
Which of the following represents neoprene polymer ? |
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Answer» `-CH_2-OVERSET(CL)overset(|)CHunderset(N)-` |
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| 10136. |
What is freezing point of a liquid ? The freezing point of pure benzene is 278.4 K. Calculate the freezing point of the solution when 2.0 gram of a solute having molecular weight 100 gram is added to 100 gram of benzene. (K_(f) for benzene =5.12 kg "mol"^(-1)) |
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Answer» Solution :FREEZING POINT of aliquid is a temperature at whichthe vapour pressure of solid is EQUAL to the vapour pressure of the LIQUID. Given, `(T^(@))` Freezing point of benzene = 278.4 K (T) Freezing pointof solution = ? `(W_(2))` Mass of solute `=2.0 g= 2.0xx10^(-3)kg` `(M_(2))` Molar mass of solute `=100g = 0.1 kg ` `K_(f)` of benzene `=5.12` kg `"mol"^(-1)` `(W_(1))` Mass of solvent `=100 g = 0.1 kg` `Delta T_(f)=(W_(2)xxK_(f)xx1000)/(M_(2)xxW_(1))` `T^(@)-T=(2.0xx5.12xx10^(-3))/(0.100xx0.1)` `278.4-T=1.024` `278.4-T=1.024K` `T=-1.024+278.4` `=277.376` K Freezing point of solution is 277.376 K. |
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| 10137. |
Two beakers one containing 20mL of a 0.05M aqueous solution of a nonvolatile, nonelectrolyte and the other, the same volume of 0.03M aqueous solution of NaCl, are placed side by side in a closed encloser. What are the volumes in the two beakers when equilibrium is attained. |
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Answer» Solution :Moles of SOLUTE particles in the first beaker `=(0.05)/(1000)xx20=0.001` Moles of solute particles `(Na^(+)"and"Cl^(-))` in the other beaker `=(2xx0.03)/(1000)xx20=0.0012` As the solution in the first beaker is more dilute than that in the other beaker, the vapour PRESSURE over the solution in the first beaker will be higher than that over the NaCl solution in the SECOND beaker. The water molecules shall thus flow from the first beaker to the other till both the SOLUTIONS have equal MOLARITY. Let this volume of water molecules be vmL. Thus, `(0.001)/(20-v)=(0.0012)/(20+v)` or `v=1.8mL` `:.` volume of the solution in the first beaker `=20-1.8=18.2mL` and the volume of NaCl solution in the other beaker `=20+1.8=21.8mL` |
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| 10138. |
Which of the following B group vitamins can be stored in our body? |
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Answer» VITAMIN `B_(1)` |
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| 10139. |
What is the effect of catalyst on (i) Gibbs energy (DeltaG) and (ii) activation energy of a reaction |
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Answer» Solution :(i) Gibbs ENERGY REMAINS unchanged on adding the catalyst. (ii) Activation energy of the reaction is LOWERED on adding the catalyst. |
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| 10140. |
Write the cell reaction and caleulate the e.m.f of the following cell at 298 K: Sn (s) // [Sn^(2+) (0.004 M) || H^+ (0.020) M] / /H_2 (g) (I bar) | Pt (s) |
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Answer» SOLUTION :`Sn^+ 2H+ to Sn^(2+) + H_2` (EQUATION must be BALANCED) `E=E^@ 0.059/.2 LOG ([Sn^(2+)])/([H^+]^2)` `=[0(-0.14)]-0.0295 log ((0.004))(0.02)^2` |
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| 10141. |
Which one of the following will undergo meta substitution on monochlorination |
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Answer» ETHOXY ethane 
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| 10142. |
Which of the following statements is correct for the boiling point of solvent containing a dissolved solid substance |
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Answer» Boiling point of the liquid is DEPRESSED |
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| 10143. |
Write the structures of the main products when CH_(3) CH_(2) CHO reacts with the following : (a) Zn - Hg // conc. HCl(b) H_(2) N- NH_(2) //H^(+)(c ) HCN |
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Answer» Solution :(a) `CH_(3) CH_(2) CHO underset( "CLEMMENSEN reduction")overset(Zn-Hg//"conc. HCL")(rarr) underset("Propane")(CH_(3)CH_(2)CH_(3))` (b) `CH_(3) H_(2) CHO overset( NH_(2) OH // H^(+))(rarr) underset( "Propanal OXIME")(CH_(3) CH_(2) CH = NOH)+ H_(2) O` (c ) `CH_(3) CH_(2) CHO + HCN rarr underset( "Propanal cyanohydrin")(CH_(3) CH_(2) - underset( CN)underset( |) overset( H ) overset( |)(C ) - OH)` |
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| 10144. |
Which reaction does not takes place at cathode ? |
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Answer» `Cl^(-)rarrCl +e` |
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| 10145. |
What happens when ozone and hydrogen peroxide are allowed to react with each other? |
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Answer» SOLUTION :OZONE REACTS with `H_2O_2` to LIBERATE `O_2`. `H_2O_2 + O_3 RARR H_2O + 2O_2` |
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| 10146. |
Which compound is soluble in water |
| Answer» Solution :`C_(2)H_(5)OH` is soluble in water due to H-bonding . | |
| 10147. |
Which of the following ligands forms chelate with metal ion? |
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Answer» Acetate |
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| 10148. |
The relative lowering of vapour pressure of an aqueous solution of non-volatile solute of molecular weight 60 (which neither dissociates nor associates in the solution) is 0.018. If K_(1) of water is 1.86^(@) m^(-1), the depression in freezing point will be |
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Answer» `0.93^(@)` C |
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| 10149. |
Which of the following does not contain Iodine |
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Answer» IODEX |
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| 10150. |
What is the decreasing order of strength of the bases OH^(-), NH_(2)^(-), HC=C^(-)and CH_(3)CH_(2)^(-)? |
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Answer» `CH_(2)CH_(2)^(-) gt HC=C^(-) gtNH_(2)^(-) gt OH^(-)` `H_(2)OgtNH_(3)gtHC=CHgtCH_(3)-CH_(3)` the basic character of their conjugate bases decreases in the reverse order. i.e., `HC=C^(-) gtCH_(2)CH_(2)^(-) gt NH_(2)^(-) gt OH^(-)` |
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