ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Benzene was discovered by Michael Faraday's in 1824 1825 1826 1827
2 Substituted phenyl groups are called acyl groups phenyl groups Aryl groups Alkyle groups
3 Toluene is also called Hydroxyl benzene Methyl benzene ethyl benzene None
4 In which one of the following compound rings are not fused together at ortho positions Phenanthrene Naphthalene Diphenyemethane Anthracene
5 Which one of following is not monocyclic aromatic hydrocarbon Benzaldehyde Benzoic acid Benzene sulfonic acid Biphenyl
6 Which compound was recognized the parent member of aromatic compounds Aniline Phenol Benzene Toluene
7 The term aromatic was derives from Greek word Latin Russian English
8 The compound prepared by a substitution reaction of benzene is Acetophenone Glyoxal Cyclohexame Hexabromo cyclohexane
9 Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively Zinc dust and soda lime Soda time and zinc dust Zinc dust and sodium hydroxide Soda lime and copper
10 Octane number can be changed by Isomerisation Alkylation Cyclisation All of these
11 The treatment of benzene with isobutene in the presence of sulphuric acid give isobutyl benzene tert-Butyl benzene n- Butyl benzene no reaction
12 Which of the following possesses the highest melting point? Chlorobenzene 0-Dichlorobenzene m-Dichlorobenzene p-Dichlorobenzene
13 Which of the following species participate in sulphonation of benzene ring? H2SO4 HSO4 SO3 SO<sup>-</sup><sub>2</sub>
14 Benzene is obtained by fractional distillation of Heavy oil Anthracene oil Middle oil Light oil
15 Which reaction sequence would be best to prepare 3-chloro-aniline from benzene? Chlorination, nitration, reducing Nitration, chlorination, reducition Nitration, reduction,chlorination Nitration, reduction, acylation, chlorination, hydrolysis
16 Most common reactions of benzene and its derivatives are electrophilic addition reactions electrophilic substitution reactions Nucleophilic addition reactions Nucleophilic subtitution reactions
17 The presence of a double bond in a compound is the sign of Saturation Unsaturation Substitution None of above
18 The alkynides are used for the ----------- of alkynes Pxperation Purification Seperation All of above
19 The hydrocarbon which is used as an illuminating agent Methane Methene Methyne B &amp; C
20 The hydrocarbon used for polymerization is Alkanes Alkenes Alkynes All of above
21 An alkynes having Carbon count of 20 is gas liquid Solid None
22 Alkynes are colourless & odouless except Acetylene Propyne Butyne Pentyne
23 The method involved for electrolysis of Na or K salts of carboxylic acids Sabatier's sendrens reaction Kolbe's method Clemmensen Wolf kishner reduction
24 During the preparation of alkynes the active metals that react with tetra halo-alkanes are Zn Mg Both a and b None
25 Mustard gas is a Gas High boiling speed High melting liquid Steam
26 Polymerization of ethane take place at pressure of 100 atm and a temperature of 200<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 400<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 600<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 800<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
27 Raney - nickel is the alloy of Ni with Pt Al Cu Pd
28 The order of reactivity of halogen acids towards alkenes HCl &gt; HBr &gt; Hl HBr &gt; HCl &gt; HI HCl &gt; HBr HI &gt; HBr &gt; HCl
29 Catalytic oxidation of alkanes is used for the preparation of Adehydes Ketones Fatty acid Carbonyylic acids
30 Incomplete oxidation of alkanes yields CO<sub>2</sub>&amp; carbon black CO<sub>2</sub>+ heat CO and carbon black CO + heat
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