ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Compound X has molecular formula C10H14O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X
2 In its reaction with Na, 1 mol of X gives 1 mol of H2(g). What is X CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>OH (CH<sub>3</sub>)<sub>3</sub>COH CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CO<sub>2</sub>H CH<sub>3</sub>CH(OH)CO<sub>2</sub>H
3 1-bromobutane 2-bromobutane 1-bromo-2-methyl propane 2-bromo-2-methyl propane
4 An organic compound will decolorise dill acidified (aq) KMnO4on warming, but will not decolorise bromine water. What is the compound KMnO<sub>4</sub> Ethanol Ethane CH<sub>3</sub>CH<sub>2</sub>Cl
5 Which structure shows a tertiary alcohol CH<sub>3</sub>CH<sub>2</sub>OH (CH<sub>3</sub>)<sub>2</sub>CHOH (CH<sub>3</sub>)<sub>3</sub>COH CH<sub>2</sub>OH
6 How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH2OH 1 2 3 4
7 What will react differently with the two isomeric pentols, (CH3)3CCH2OH and (CH3)2CH CH2CH2OH Acidified (aq) KMnO<sub>4</sub> Concentrated H<sub>2</sub>SO<sub>4</sub> PCl Sodium
8 Which alcohol gives only one oxidation product when wormed with dil acidified K2Cr2O7 Butan-1-ol Butan-2-ol 2-methyl propan-1-ol 2-methyl propan-2-ol
9 How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C4H10O 3 4 5 6
10 NH<sub>3</sub> HCl KCN in C<sub>2</sub>H<sub>5</sub>OH NaOH KCN in C<sub>2</sub>H<sub>5</sub>OH HCl HCN NaOH
11 Electrophilic substitution Free radical reduction Isomerisation Nucleophilic substitution
12 Which reaction is example of nucleophilic substitution
13 What is the total number of different chloroethanes, formula C2H6-nCln, where n can be any integer from 1 to 4 4 6 7 8
14 Condensation Electrophilic substitution Free radical substitution Nucleophilic substitution
15 Each of the following compounds is effective as a refrigerant. The release of which one of these causes the greatest depletion of the ozone layer CCl<sub>2</sub>F<sub>2</sub> CH<sub>3</sub>OCH<sub>3</sub> CH<sub>3</sub>CHF<sub>2</sub> CH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub>
16 CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF2Cl. CHF Cl C FCl CH Cl CF<sub>2</sub>Cl CHF CF<sub>2</sub>Cl C FCl CF<sub>2</sub>Cl
17 What is the total number of different chloroethanes of formula C2H6-nClnpossible (n may be 1 to 6) 6 8 9 10
18 Electrophilic addition Electrophilic substitution Free radical substitution Nuclophilic addition
19 Which one of the following is not a nucleophile H<sub>2</sub>O H<sub>2</sub>S BF<sub>3</sub> NH<sub>3</sub>
20 Alkyl halides ae considered to be very reactive compounds towards nucleophiles because They have an electrophilic carbon They have an electrophilic carbon and a good leaving group They have an electrophilic carbon and a bad leaving group They have a nucleophilic carbon and a good leaving group
21 When CO2is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is Propane Propanoic acid Propanal Propanol
22 Grignard's reagent is Alkyl halide Magnesium halide Alkyl magnesium halide Ethereal solution of an alkyl halide
23 When formaldehyde is added to Grignard reagent we get Aldehyde Acetone Primary alcohol Secondary alcohol
24 The compounds or species in search of electrons are called Elctrophiles Nucleophile Nitrities Bases
25 Thre rate of SN2 reaction depends upon the Concentration of alkyl halides Concentration of nucleophile Concentration of alkyl halides and nucleophile None of the above
26 When alkyl halide is heated with aqueous solution of ammonia at 100°C the major product is Primary amine Secondary amine Tertiary amine Mixture of amines and salt
27 Which of the following alkyl halides is used as a mathylating agent CH<sub>2</sub>H<sub>5</sub>l CH<sub>3</sub>l C<sub>2</sub>H<sub>5</sub>Pr C<sub>2</sub>H<sub>5</sub>Cl
28 During nitration of benzene, the active nitrating agent is NO3 NO2+ NO2- HNO3
29 Amongst the following the compound that can be most readily sulphonated is Toluene Benzene Nitrobenzene Chlorobenzene
30 Benzene does not undergo Substitution reaction Addition reaction Oxidation reaction Elimination reaction
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