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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.
| 8551. |
(X)C_(4)H_(7)O Cloverset(NH_(3))rarrC_(4)H_(9)ONunderset(KOH)overset(Br_(2))rarrCH_(3)CH_(2)CH_(2)NH_(2): Compound (X) is : |
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Answer»
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| 8552. |
Which one of the following cations gives a brick red flame by flame test |
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Answer» `BA^(2+)` |
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| 8553. |
The well known compouns, (+) lactic acid and (-) lactic acid have the same molecular formula, C_(3)H_(6)O_(3). The correct relationship between them is: |
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Answer» CONSTITUTIONAL isomerism |
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| 8554. |
Which of the following is/are true statements |
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Answer» Water vapour is absorbed by ANHYDROUS calcium chloride both adsorbed by silica gel. |
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| 8555. |
Which of the following compound is chiral? |
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Answer» 1-pentanol |
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| 8556. |
When ferric chloride is treated with potassium ferrocyanide, we get: |
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Answer» TURNBULL blue |
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| 8557. |
The statements regarding N, molecule are I) The Bond energy is 945. 4 KJ/mole II) It has triple bond III)It contains 2sigma and 1pi bond The correct combination is |
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Answer» Only II is CORRECT |
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| 8558. |
Which of the following compounds are linear? |
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Answer»
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| 8559. |
Which one of the following is ethanoic acid ? |
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Answer» HCOOH |
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| 8560. |
Which statement(s) about conductivity of water is/are correct? |
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Answer» it possesses almost non-conducting nature |
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| 8561. |
When either enantiomer of 3-chloro-l-butene ((R) or (S)] is subjected to hydrolysis, the products of the reaction are optically inactive. Explain these results. |
Answer» Solution :The solvolysis REACTION is `S_N^1` . The INTERMEDIATE ALLYLIC cation is ACHIRAL and therefore reacts with water to give the ENANTIOMERIC 3-buten-2-ols in equal amounts and to give some of the achiral 2-buten-1-ol:
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| 8562. |
What will happen if C Cl_(4) is treated with AgNO_(3) |
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Answer» A white ppt. of AGCL will FORM |
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| 8563. |
Which of the following carboxylic acids do not undergo decarboxylation simply on heating? |
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Answer» `F_(3)C-overset(O)overset("||")C-OH` |
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| 8564. |
Two moles of ammonia gas are introduced into a previously evacuated 1 L flask in which it partially dissociates at high temperature as:2NH_(3)(g)hArr N_(2)(g)+3H_(2)(g)At equilibrium 1.0 mole of NH_(3)(g)is found. What is K_(c ) ? |
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Answer» `0.75` `K=([N_(2)][H_(2)]^(3))/([NH_(3)]^(2))` `=((0.5)(1.5)^(3))/((1)^(2))=1.7` |
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| 8565. |
Which of the following is trimethyl acetaldehyde ? |
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Answer» `(CH_(3))_(3) C - CH_(2) - CHO` |
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| 8566. |
Which of the following willnot be solube in sodium hydrogen carbonate |
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Answer» o-Nitrophenol |
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| 8567. |
Which of the following is the most basic oxide? |
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Answer» `Sb_(2)O_(3)` |
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| 8568. |
Which of the following decreasing order is correct in Williamson synthesis of the compounds ? |
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Answer» II gt IV gt III gt I |
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| 8569. |
What are the raw materials required for the manufacture of bakelite? |
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Answer» ETHANE 1,2-diol + BENZENE 1,4 - dicarboxylic acid |
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| 8570. |
which of the following statements , about the advantage of roasting of sulphide ore before reduction is not true ? |
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Answer» The `Delta_fG^@` of the SUPHIDE is GREATER than those for `CS_2 and H_2S` |
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| 8571. |
Which will undergo reaction with ammonical AgNO_(3) : |
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Answer»
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| 8573. |
Which is the correct order of increasing basic strength ? |
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Answer» `MgOltBeOltCaOltBaO` |
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| 8575. |
The sum of the first and second ionisation enthalpies and those of third and fourth ionisation enthalpies of nickel and platinum are given below: {:(,,IE_(1)+IE_(2)(kJ mol^(-1)),,IE_(3)+IE_(4)(kJ mol^(-1))),(Ni,,2.49,,8.80),(Pt,,2.66,,6.70):} Taking these values into account write : (i) the most common oxidation state for Ni and Pt and its reason. (ii) the name of the metal (Ni or Pt) which can form compounds in +4 oxidation state more easily and why? |
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Answer» Solution :(i) Ni SHOWS +2 oxidation STATE because of LOWER `(IE_(1)+IE_(2))`. Platinum shows +4 oxidation state because extra ENERGY `IE_(3)+IE_(4)` is balanced by HYDRATION energy. (ii) Pt can form compounds in +4 oxidation state because the energy required to remove four electrons is less in case of Pt than Ni. |
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| 8576. |
Write structures and IUPAC names of the amide which gives propanamine by Hoffmann bromamide recation. |
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Answer» SOLUTION :Propanamine contains three carbon atoms. Hence the AMIDE MOLECULE should contain FOUR carbon atoms. It is butanamide. Its structure is `CH_(3)-CH_(2)-CH_(2)-CONH_(2)`. |
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| 8577. |
The two isomers X and Y with the formul Cr(H_(2)O_(5))ClBr_(2) were taken for experiment on depression in freezing point. It was found that one mole of X gave depression corresponding to 2 moles of particles and one mole of Y gave depression due to 3 moles of particles. The structural formulae of X and Y respectively are |
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Answer» `[Cr(H_(2)O)_(5)Cl]Br_(2) , [Cr(H_(2)O)_(4)Br_(2)]Cl.H_(2)O` |
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| 8578. |
Total number of isomers of [Pt(NH_(3))(Br)(Cl)(py)] are |
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Answer» (ab)(CD) (ac)(BD) (AD)(bc) |
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| 8579. |
What is the oxidation number ofcarbonyl carbon in methanal ? |
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Answer» Solution :`H-overset(O)overset(||)(C)-HorHCHO` `+1+x-2+1=0` or x=0 |
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| 8580. |
Which one of the following inhibits bacterial cell wall biosynthesis? |
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Answer» ERYTHROMYCIN |
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| 8581. |
Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al_(2)(SO_(4))_(3)? Given that Lambda_(Al^(3+))^(@) and Lambda_(SO_(4)^(2-))^(@)are the equivalent conductances at infinite dilution of the respective ions ? |
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Answer» `2Lambda_(Al^(3+))^(@) + 3Lambda_(SO_(4)^(2-))^(@)` |
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| 8583. |
The van der Waals' constants for four gases P,Q,R and S are 4.17 , 3.59, 6.71 and 3.8 atm L^(2) mol^(-2) respectively. The ascending order for their liquefication is |
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Answer» <P>`R lt P lt S lt Q` |
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| 8584. |
Which of the following is amorphous in nature? |
| Answer» Answer :D | |
| 8587. |
What is the product when C_(6)H_(5)CH_(2)NH_(2) reacts with HNO ? |
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Answer» Solution :When benzylamine is treated with `HNO_(2)`, bynzylidiazonium CHLORIDE is formed formed which being unstable decomposes to FORM benzyl alcohol. `UNDERSET("Benzylamine")(C_(6)H_(5)CH_(2)NH_(2)) underset(HCl)overset(HNO_(2))to underset(("unstable"))([C_(6)H_(5)CH_(2)-overset(+)(N)-=N]Cl^(-)) underset(-N_(2)-HCl)overset(H_(2)O)to underset("Benzyl alcohol")(C_(6)H_(5)CH_(2)OH)` |
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| 8588. |
Tincture of iodine (2-3% I_2 in water/alcohol) is |
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Answer» ANTISEPTIC |
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| 8589. |
Which contains ionic as well as covalent bonds? |
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Answer» LICI |
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| 8590. |
Which of the following has maximum bond energy ? |
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Answer» `O_2` |
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| 8592. |
Which carbohydrate is an essential constituent of plant cells ? |
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Answer» STARCH |
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| 8593. |
Which of the statement with regard to Isotopes and Isobars is/are correct ? 1. Isotopes have same mass number. 2. Isobars have same atomic number. Select the correct answer using the code given below : |
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Answer» 1 only |
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| 8594. |
When a piece of copper wire is immersed in a solution of aqueous silver nitrate, the solution becomes blue. This is a consequence of : |
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Answer» OXIDATION of silver |
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| 8596. |
Which loses charge at cathode |
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Answer» IONS |
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| 8597. |
What is physical adsorption ? |
| Answer» SOLUTION :If the adsorbate is held on a surface by WEAK VAN der Walls forces, the adsorption is CALLED physical adsorption. | |
| 8598. |
Which of the following is not a mixture of hydrocarbons? |
| Answer» Answer :D | |
| 8599. |
Write down the steps involved in a metallurgical process. |
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Answer» Solution :The extraction of a metal from its ORE CONSISTS the following METALLURGICAL PROCESS. (i) Concentration of the ore (II) Extraction of crude metal (iii) Refining of crude metal |
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| 8600. |
Whichof the following antiseptics is used to cure wounds ? |
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Answer» PENCILLIN |
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