ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Aromatic hydrocarbons are the derivatives of Normal series of paraffins Alkene Benzene Cyclohexane
2 The benzene molecule contains Three double bonds Two double bonds One double bonds Delocalizedπ-electron charge
3 A single benzene ring can have ______ ortho position maximally One Two Three Four
4 Which of the following is not an ortho-para directing group
5 Which of the following is an ortho-para directing group
6 Which of the following is not an electrophitic substitution reaction of benzene Nitration Sulphonation Fridel-Craft alkylation Free radical chlorination of benzene
7 Which of the following reaction is characteristic of benzene Electrophilic substitution reaction Reduction Oxidation Ozonolysis
8 Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called Wurtz reaction Fitting reaction Wurtz fitting reaction None of these
9 When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product Na<sub>2</sub>CO<sub>3</sub> NaHCO<sub>3</sub> Ca(OH)<sub>2</sub> CaCO<sub>3</sub>
10 The carbon, carbon bond length in benzene is 1.54A° 1.34A° 1.20A° 1.39A°
11 Cyclohexane can be converted not benzene in the presence of Pt at 100°C Pt at 250°C Pd at room temperature Pt at room temperature
12 2-bromonitrobenzene 2-nitrobromobenzene 1-bromonitrobenzene 1-nitrobromobenzene
13 Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes 2 1 3 4
14 Which of the following is not aromatic hydrogencarbon Benzene Naphthalene Toluene Cyclohexene
15 The simplest and the parent members of aromatic hydrocarbon is Benzene Toluene Biphenyis Naphthalene
16 The order of dehydration of alcohol 10&gt; 20&gt; 30 10&gt; 30&gt; 20 20&gt; 30&gt; 10 30&gt; 20&gt; 10
17 3 4 5 2
18 The gasoline having octane No. 100 has ______ More knocking Less knocking No knocking Only knocking
19 1, 5-pentadiene Penta-1, 4-diene 1, 1-pentadiene 1, 4-pentene
20 Which structure shows a primary alcohol
21 2, 2, 4-trimethylpentane 2, 4, 4-trimethylpentane 2, 4, 4-methyepentane 2, 2, 4-methylpentane
22 0 1 2 3
23 1 2 3 4
24 Condensation Dehydration Dehydrogenation Hydrogenation
25 Which of these always applies to a nucleophile It attacks a double bond It has a lone pair of electrons It is single atom It is negatively charged
26 Addition Elimination Addition Reduction Elimination Reduction Substitution Elimination
27 0 1 0 2 1 1 1 2
28 How many structural acid cis-trans isomers are there for dichloroprepe, C3H4Cl2 3 5 6 7
29 Cracking done at low pressure and with a catalyst is called _______ cracking Thermal Catalytic Steam None of them
30 A nuclophile must Be an atom A group of atoms Have a lone pair Be negatively charged
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