PPSC Chemistry Part II Organic Chemistry Online Test With Answers

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PPSC Chemistry Part II Organic Chemistry Online Test

Sr. # Questions Answers Choice
1 The criteria for aromatically is presence of Uneaturations Cyclic structure Presence of 4nx electrons Presence of 4n + 2n electrons
2 The denationalization involving C - H sigma bond electrons is known as . Conjugation Hyperconjugation Mesomerism Resonance
3 Compounds consisting of two or more interlocked rings are called. Inclusion compounds Cage compounds Catenanes Crown other
4 Cyclic polymers of ethylene glycol formed by condensation are called. Crown ether Brown ether Cryptates Both A and C
5 The common host compound for the formation of inclusion compound is. Urea Thiourea Cholic acid All above
6 The compounds whose formation require a host compound and a guest compound are called. Exclusion compounds Inclusion compounds Crystal compounds None of the above
7 Which of the following statements is not correct with respect to applications of H- bonding. It explains the usual b.p. and m.p of certain class of compound. It explains the solubility of certain organic compounds in hydroxylic solvents It explains the lack of ideal behavior in gases and solutions It has stonrg influence on the configuration of certain molecules.
8 In hydrogen bonding a hydrogen atom is bonded to which of the highly electronegative atoms. N O F N,O,F
9 Which of the following organic molecule is not aromatic. Benzene Naphthalene Anthracene Cyclo-octatetraene
10 Which of the following class of compounds follow the criteria of aromatically. The compounds must have high degree of unsaturation they must have the property to undergo addition reactions They must have the property to undergo substitution reactions They must have the ability to sustain an induced current in NMR
11 Which of the following statements in not correct with respect to the important characteristics of aromatic compounds. They are usually cyclic compounds They are resistant to usual addition reactions They usually undergo substitution reactions They are less stable
12 Which of the following statements is not correct. with respect to resonance. The position of atomic nuclei mus be same The limiting structures must have same number of paired and unpaired electrons. The energy of the various limiting structures must contribute equally All above
13 The decrease in electron density at one position accompanied by a corresponding increase at other position is called. Inductive effect Asymmetric effect Electromeric effect Resonance effect
14 Which of the following statement is not correct with respect to electrometric effect. It is permanent effect It is brought into play instantaneously at the demand of attacking reagent It proceeds a polar addition reaction The original electronic condition is restored after the removal of tacking regent.
15 To complete transfer of a shared pir of electrons to one of the atoms joined by a double or triple bond at the requirement of an attacking reagent is known as. Inductive effect Resonance effect Eletromeric effect Stark effect
16 Which of the following case of acid or base strength is not explained by inductive effect. Formic acid> acetic acid Dimethyl amine > trimethyl amine Dimethyl amine > methyl amine Chloroacetic acid > acetic acid
17 Correct order of increasing ______ I effect of groups is ----- NO2 &gt;-----------CN &gt; ------------COOH &gt; -------------F --------F &gt; -------------COOH&gt;----------CN&gt;--------NO2 -----F&gt; -------------CN&gt;--------NO2 &gt; COOH<div><br></div> -------CN &gt; ------------COOH &gt; -----------NO2 &gt;----------F
18 Inductive effect can be used to explain Dipole moment of chemical bonds Strength of acids Strength of bases All above
19 Which of the following statement in not correct with respect to inductive effect. Bond length decrease with increase in inductive effect. Inductive effect generates polar character in bonds Variation in strength of aliphatic acids can be explained It alone cna explain the basically of triphenylamine
20 An induction of dipole or polarity in non polar bond, and consequent electron shifting along a chain of atoms is known as. Inductive effect Resonance effect Hyper conjugation None of the above
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