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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.
| 11251. |
Which of the following halides does not exist ? |
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Answer» `NF_(3)` |
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| 11252. |
The wavelength of the first line of Balmer series of H-atom of 6561Å. The wavelength of the second line of the series is |
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Answer» `13122Å` |
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| 11253. |
Write the balanced equation in the manufacture of K_2Cr_2O_7 from chromite ore |
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Answer» Solution :`4FeCr_(2)O_(4)+8Na_(2)CrO_(4)+2Fe_(2)O_(3)+8CO_(2)` `2Na_(2)CrO_(4)+2H^(+)rarrNa_(2)Cr_(2)O_(7)+2NA^(+)+H_(2)O` `Na_(2)Cr_(2)O_(7)+2KCl rarrk_(2)Cr_(2)O_(7)+2NaCl` |
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| 11254. |
Whenn- hexaneis heatedwithanhyrousAlCl_(3) andHcl gas , themajor product obtsinedis : |
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Answer» 1- CHLOROHEXANE |
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| 11255. |
Which of the following is the order decompostion of hydrogen peroxide catalysed by I^- ? |
| Answer» Answer :A | |
| 11256. |
Which one of the following is tailing of mercury? |
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Answer» `N_2O` |
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| 11257. |
Two gases A and B present separately in two vessels X & Y at the same temperature with molecular weights M & 2 M respectively are effused out. The orifice in vessel X is circular while that in Y is a square. If the radius of the circular orifice is equal to that of the length of the square orifice, the ration of rates of effusion of gas A to that of gas B is. |
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Answer» `SQRT(2 PI)` |
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| 11258. |
Which one of the followint structures represents nylon 6,6 polymer ? |
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Answer»
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| 11259. |
Which is false in case of carboxylic acids: |
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Answer» They are polar molecules |
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| 11260. |
What Grignardreagentwoulduse tomakefollowingconversions? ( i)Acetophenoneto 2-phenylbutan -2-ol (ii ) Cyclohexanoneto 1- propylcyclohexanol (iii )Formaldehydeto benzylalcohol . |
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Answer» SOLUTION :`(I )C_2H_5 MG Br` `(ii)CH_3 CH_2 CH_2 MGBR ` `(iii)C_6 H_5 Mg Br ` |
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| 11261. |
Which of the following is a syndiotactic polymer in [-CH_(2)-C(YZ)-]_(n) |
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Answer» All Y GROUPS lie on one side of the chain and all Z groups on the other side (i) ISOTACTIC (same order) :- Here group are arranged on one side of the chain. All y groups lie on one side and all Z groups on the oppsitie side of the chain  (II) Syndiotactic (alternating order) -The Y and Z group lie alternately on each side of the chain  (III) Atactic (Random order) -The Y and Z groups are arranged in random FASHION 
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| 11262. |
Vapour pressure of a solution containing a non volatile solute is |
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Answer» more than the vapour pressure of PURE solvent |
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| 11263. |
Which of the following compounds will not undergo Friedel-Crafts reaction easily ? |
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Answer» Nitrobenzene |
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| 11264. |
The solubility of AgI in NaI is lower than that in pure water, because: |
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Answer» AGI forms complex with NaI |
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| 11265. |
Which is soluble in NONO_(2) and dil HCl mixture forming salt ? |
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Answer» `(CH_(3))_(2)NH_(2)` |
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| 11266. |
What is the values of DeltaG, equilibrium constant K and E_(cell)^@ for the spontaneous reaction |
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Answer» `+ve,LT1,-ve` `Kgt1`, spontaneous forward reaction will occur. And `E_(cell)^(@)=+ve`, spontaneous forward reaction will occur. |
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| 11267. |
Which gas shows a heating effect when expanded into a region of low pressure: |
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Answer» `O_2` |
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| 11268. |
Write IUPAC name of the compound [(C_2H_5)_4Ni][ZnCl_4] |
| Answer» Solution :IUPAC name of the compound, `[(C_2H_5)_4 Ni] [ZnCl_4]` is Tetraethyl nickel (II) TETRACHLOROZINCATE (II). | |
| 11269. |
Write the structure of phenyl isopentylether. |
Answer» SOLUTION :
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| 11270. |
Which are of the following is a case of adsorption? |
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Answer» Anhydrous `CaCl_2` in CONTACT with water vapour |
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| 11271. |
Which of the following reagent is used to get aldehyde from alcohol by oxidation method? |
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Answer» `Na_2Cr_2O_7` |
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| 11272. |
What is the covalency of Al in [AlCl(H_2O)_5]^(2+) ? |
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Answer» 3 |
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| 11273. |
Which of the following statement is incorrect regarding physisorption? |
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Answer» It occurs because of Van der Waals forces |
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| 11274. |
Which of the following (1M) conducts more electricity? |
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Answer» sulphuric ACID |
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| 11275. |
What is synthetic detergents ? Explain its types. |
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Answer» Solution :Synthetic detergents are cleansing agents which have all the properties of soaps, but which actually do not contain any soap. These can be used both in soft and hard water as they give foam EVEN in hard water. Some of the detergents give foam even in ice cold water. Synthetic detergents are mainly classified into three categories : (i) Anionic detergents (ii) Cationic detergents and (iii) Non-ionic detergents (i) Anionic Detergents : Anionic detergents are sodium salts of sulphonated long CHAIN alcohols or hydrocarbons. Alkyl hydrogensulphates formed by treating long chain alcohols with concentrated sulphuric acid are neutralised with alkali to form anionic detergents. Similarly alkyl benzene sulphonates are obtained by neutralizing alkyl benzene sulphonic acids with alkali.  In anionic detergents, the anionic part of the molecule is involved in the cleansing action. Sodium salts of alkylbenzenesulphonates are an important class of anionic detergents. They are mostly used for household work. Anionic detergents are ALSO used in toothpastes. (ii) Cationic Detergents : Cationic detergents are quarternary ammonium salts of amines with acetates, chlorides or BROMIDES as anions. Cationic part possess a long hydrocarbon chain and a positive charge on nitrogen atom. Hence, these are called cationic detergents. Cetyltrimethylammonium bromide is a popular cationic detergent and is used in hair conditioners. `underset("Cettltrimethyl ammonium bromide")([CH_(3)(CH_(2))_(15)-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"N "-CH_(3)]^(+)Br^(-)` Cationic detergents have germicidal properties and are expensive, therefore, these are of limited use. (iii) Non-ionic Detergents : Non-ionic detergents do not contain any ion in their constitution. One such detergent is formed when stearic acid reacts with poly-ethyleneglycol.  Liquid dishwashing detergents are non-ionic type. Mechanism of cleansing action of this type of detergents is the same as that of soaps. These also remove grease and oil by MICELLE formation. Main problem that appears in the use of detergents is that if their hydrocarbon chain is highly branched, then bacteria cannot degrade this easily. Slow degradation of detergents leads to their accumulation. Effluents containing such detergents reach the rivers, ponds, etc. These persist in water even after sewage treatment and cause foaming in rivers, ponds and streams and their water gets polluted. These days the branching of the hydrocarbon chain is controlled and kept to the minimum. Unbranched chains can be biodegraded more easily and hence pollution is prevented. |
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| 11276. |
What is crystal field splitting energy ? How does the magnitude of Delta_0 decide the actual configuration of d - orbitals in a co-ordination entity ? |
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Answer» Solution :When LIGANDS approach a transition metal ion, the d-orbitals SPLIT into two sets, one with lower ENERGY and the other with higher energy. The difference of energy between the two sets of orbitals is called crystal field splitting energy `(Delta_0)` in case of octahedral field. If `Delta_0 lt P` (pairing energy), the `4^(th)` electron enters one of the eg orbitals giving the configuration `t_(2g)^4e_g^1` THEREBY forming high spin complexes. Such ligands for which `Delta_0 lt P` are called weak field ligands. If` Delta_0 gt P`, the `4^(th)` electron pairs up in one of the `t_(2g)` orbitals giving the configuration `t_(2g)^(4) e_g^1` thus forming low spin complexes. Such ligands for which `Delta_0 gt` Pare called strong field ligands. |
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| 11277. |
What is azeotrophic mixture ? Can it be considered as ideal solution ? |
| Answer» SOLUTION :Second PART: AZEOTROPIC mixture does not OBEY Raoult's law. So, it can not be CONSIDERED as ideal solution. | |
| 11278. |
Which of the following is a correct name according to IUPAC rules? |
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Answer» 2,3-Diethylhexane |
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| 11279. |
What happens when gelatin is mixed with gold sol ? |
| Answer» SOLUTION : Gold sol is a lyophobic sol. On ADDITION of gelatin, the sol is STABILISED. | |
| 11280. |
Which reaction can be used for the direct conversion of amides into 1^(@) amine ? |
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Answer» Claisen reaction |
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| 11281. |
What is the order of reactivity of HCl, HBr and HI with alcohols? |
| Answer» Solution :Reactivity DECREASES as the STRENGTH of the H-X BOND INCREASES, i.e., HIgtHBrgtHCl. | |
| 11282. |
What is the approximate quantity of electricity in 500 ml 1M AgNO_3aqueous solution (At. wt. of Ag = 108) ? |
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Answer» 96500 |
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| 11283. |
When aceteamide is treated with LiAIH_4_________ is formed : |
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Answer» Ethanol |
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| 11284. |
Which of the following order is not correct ? |
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Answer» `[Cr(NH_(3))_(6)]^(+3) gt [Mn(CN)_(6)]^(-3) gt [V(CO)_(6)]` spin m.m. |
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| 11285. |
The temporary effect in which there is a complete transfer of shared pair of pi- electrons to one of the atoms joined by a multiple bond on the demand of an attacking reagent is called: |
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Answer» INDUCTIVE effect |
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| 11286. |
The volume to be excluded due to only two molecules of a gas in collision with a fixed point of impact is (0.09)/N_(A) litre(NA = Avogadro number). If the value of 'a' is 3.6 atm L^(2) mol^(-2) , then the value of Boyle'stemperature is, 10^(x) K. What is the value of 'x' ? (R = 0.08 L atm K^(-1) m^(-1) ) |
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Answer» |
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| 11287. |
Two first order reactions have half lives in the ratio 3:2. If t_(1) and t_(2) are the time periods for 25% and 75% completion for the first and second reactions respectiely find t_(1):t_(2) |
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Answer» `0.311:1` `impliesK_(1)xxt_(25)=2.303log(100/75)impliesK_(2)xxt_(75)=2.3031log(100/25)` `((0.693/3))/((0.693/2))XX(t_(1))/(t_(2))=("log"4/3)/(log4),2/3xx(t_(1))/(t_(2)),2/3xx(t_(1))/(t_(2))=(log4-LOG3)/(log4),(t_(1))/(t_(2))=3/2xx((log4)/(log4)-(log3)/(log4))` `=3/2xx(1-0.4771/0.6020)=3/2xx(1-0.7925)=3/2xx0.207475=0.311` |
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| 11288. |
Which one is a chief polymer of polyester class ? |
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Answer» TERYLENE |
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| 11289. |
Which of the following react with CH_3I, at a faster rate under SN^2 conditions |
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Answer»
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| 11290. |
Urea on heating with ethyl alcohol gives: |
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Answer» urethane |
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| 11291. |
Which of the following represent correct product formation? |
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Answer»
 is the MAJORPRODUCT.
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| 11292. |
When propionic acid is subjected to reduction with hydroiodicacid acid Red phosphorus ,the product formed is |
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Answer» BUTANE |
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| 11293. |
What happens when XeF_4 undergoes hydrolysis ? |
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Answer» SOLUTION :The EQUATIONS CORRESPONDING to the REACTIONS are GIVEN below: `6XeF_4 + 12H_2O to 4Xe + 2XeO_3 + 24HF + 3O_2` . |
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| 11294. |
Which is behaviest |
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Answer» 25 gm of mercury |
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| 11295. |
Thiol group is present in: |
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Answer» METHIONINE |
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| 11296. |
Transition metals can form complexes. in: |
| Answer» Answer :D | |
| 11297. |
Which of the following compounds decol - ourises aqueous bromine and gives white fumes of HCl on reaction with PCl_5 ? |
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Answer» `CH_3CH_2CH_2CH_2OH` |
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| 11298. |
XeF_(4) is...........molecule in which Xe is.............hydbridized. |
| Answer» Solution :SQUARE planner, `SP^(3)d^(2)` | |
| 11299. |
What are emulsions ? Discuss the cleansing action of soaps. |
| Answer» | |
| 11300. |
Which form of iron has lowest percentage of carbon ? |
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Answer» CAST IRON |
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