ECAT Chemistry Chapter 20 Aromatic Hydrocarbons Online Test With Answers

image
image
image

ECAT Chemistry Chapter 20 Aromatic Hydrocarbons Online Test

Sr. # Questions Answers Choice
1 The benzene molecule contains: Three double bond Two double bond One double bond Delocalized<span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ electron charge</span>
2 Arenes are also called atom hydrocarbons aromatic benzene
3 Which term was derived from atomos? atom hydrocarbon aromatic aliphatic
4 Which terms was derived from " aroma"? atom hydrocarbons aromatic aliphatic
5 Benzene was discovered by first of all Michael Faraday Hofmann Ainderson Sorenbon
6 The hydridization in benzene is sp<sup>3</sup> sp<sup>2</sup> sp<sup>4</sup> dsp<sup>2</sup>
7 Which is the property of benzene? decolourizes KMnO<sub>4</sub> straight chain structure only double bond is present triple and double bond
8 Empirical formula mass of benzene is times lesser than molecular formula mass four five six seven
9 Bond angle in benzene is 109.5° 180° 120° 107.20
10 Benzoic acid can be prepared from the oxidation of benzene ethyl benzene benzoic acid toluene
11 Ozonolysis of benzene gives nitration sulphonation ozonide glyoxal
12 Monosubstituted benzene can have disubstitution at position ortho meta para a, b, c
13 Benzene gives reactions generally electrophilic addition substitution synthesis addition and electrophilic substitution
14 Resonance energy of benzene is (in KJ mol-1) 120 150 170 180
15 Kekule structures contributed towards actual structure of benzene 60% 70% 80% 90%
16 Ratio of carbon to hydrogen in aromatic compounds is Low than alkanes High than alkanes Low than alkenes not high than alkanes High than high than alkenes
17 Simplest aromatic compound is bezene toluene aniline phenol
18 The conversion of n-hexane into benzene by heating in the presence of CO, is called lsomerization Aromatization Dealkylation Rearrangement
19 Aromatic compounds burn with sooty flame cause They have high percentage of hydrogen They have a ring structure They have high percentage of carbon They resist reaction with air
20 The electrophile in aromatic sulphonation Is H<sub>2</sub>SO<sub>4</sub> HSO<sub>4</sub><sup>-</sup> SO<sub>3</sub> SO<sub>3</sub><sup>+</sup>
21 Among the following, poly cyclic compound is styrene cumene naphthalene xylene
22 Which compound is the most reactive one? benzene ethene ethane ethyne
23 Which of the following is explosive? Trinitrophenol Nitrophenol Nitromethane Nitrobenzene
24 Benzene reacts with Cl, in sunlight to give the end product C<sub>6</sub>H<sub>6</sub>Cl<sub>6</sub> C<sub>6</sub>H<sub>6</sub>Cl O - C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> P-C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub>
25 Acyiation of benzene to produce aliphatic aromatic ketones is known as Friedel Craft's reaction benzenecondensation hydroformylation <div>Clemmensen reduction</div>
26 During nitration of benzene. the active nitrating agent is NO<sub>3</sub><sup>-1</sup> NO<sub>2</sub><sup>+</sup> NO<sub>2</sub><sup>-1</sup> HNO<sub>3</sub>
27 Amongst the following, the compound that can be most readily sulphonated is toluene benzene nitrobenzene chlorobenzene
28 Benzene cannot undergo substitution reactions addition reactions oxidation reactions elimination reactions
29 Which of the following acid can be used as a catalyst in Friedel Craft's reaction? AlCl<sub>3</sub> HNO<sub>3</sub> BeCl<sub>2</sub> NaCl
30 Aromatic hydrocarbons are derivatives of normal series of paraffins alkene benzene cyclohexane
Download This Set
×