ECAT Chemistry Chapter 21 Alkyl Halides Online Test With Answers

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ECAT Chemistry Chapter 21 Alkyl Halides Online Test

Sr. # Questions Answers Choice
1 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
2 Condensation Electrophilic substitution Free radical substitution Nucleophilic substitution
3 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>
4 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
5 What is the total number of different chloroethanes of formula C2H6-nClnpossible (n may be 1 to 6) 6 8 9 10
6 Electrophilic addition Electrophilic substitution Free radical substitution Nuclophilic addition
7 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>
8 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
9 When CO2is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is Propane Propanoic acid Propanal Propanol
10 Grignard's reagent is Alkyl halide Magnesium halide Alkyl magnesium halide Ethereal solution of an alkyl halide
11 When formaldehyde is added to Grignard reagent we get Aldehyde Acetone Primary alcohol Secondary alcohol
12 The compounds or species in search of electrons are called Elctrophiles Nucleophile Nitrities Bases
13 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
14 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
15 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
16 The elimination of hydrogen halide from adjacent carbon atoms is called Dehydrogenation Hydrogenation Dehydrohalogenation Hydrohalogenation
17 Ethyl bromide is formed by the reaction of HBr with Ethane Ethene Ethyne Propane
18 A carbon atom carrying a postitive charge and attached to three other atoms of groups is called Caronium ion Carbanion Oconium ion Carba ion
19 Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called Primary alkyl halides Secondary alkyl halides Tertiary alkyl halides Quaternary alkyl halides
20 Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent A ketone An aldehyde An ether Water
21 Which of the following is a nucleophile OH CH(CH<sub>3</sub>)<sub>3</sub> CH<sub>3</sub><sup>+</sup> CH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub>
22 Any other aldehyde except formaldehyde on reaction with Grignard's will produce Secondary alcohol Primary alcohol Tertiary alcohol Aromatic alcohol
23 If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a primary alcohol Secondary alcohol Tertiary alcohol Aromatic alcohol
24 Alcohol can be prepared from Grignard's reagent with an aldehyde: If we start with formaldehyde the product alcohol with be Primary Secondary Territory Aromatic
25 If carbon dioxide is bubbled through solution of Grignard's reagent in ether and the resultant product is reacted with hydrochloric acid, it gives An alkane Al alcohol A carboxylic acid An aldehyde
26 If Grignard reagent is allowed to react with another alkyl halide the main product is An alkane Cyclo alkane Alkyne An alkene
27 Ammonia like water also reacts with Grignard's reagent to give Alkane Alkene Alkyne Amide
28 By simply reacting Grignand's reagent with water we get An alkane Higher alkane An alkene An alkyne
29 Which of the following compounds could be prepared by reacting bromoethane with KCN and then reducing the product CH<sub>3</sub>CH<sub>3</sub> CH<sub>3</sub>CH<sub>2</sub>NH<sub>2</sub> CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub> CH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub>
30 In which of the following reactions is the inorganic reagent acting as a nucleophile
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