ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 The test used for the detection of ethanol in the mouth of a drunk driver is that the drunk driver is asked to blow air from mouth into a solution of K2Cr2O7and H2SO4. The colour changes, if the driver is drunk From orange to green From pink to green From orange to colorless From pink to colorless
2 When sodium metal reacts with alcohols Hydrogen gas evolves Sodium hydroxide is obtained Alcohol is reduced Alcohol is polymerised
3 The boiling points of alcohols are higher than the corresponding alkanes, This is because Of hydrogen bonding existing between molecules of alcohols Alkanes are dipolar compounds Alcohols are sweet in taste Alcohols are soluble in water
4 Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch Diastase Maltase Zymase Invertase
5 Which the increase in carbon number of solubility of an alcohol Increases Decreases Remains unaffected None of these
6 A primary alcohol A secondary alcohol An eher A phenol
7 Alcohols, phenols and ethers may be considered as derivative of Hydrocarbons Benzene Carboxylic acid Water
8 The formula of secondary alcohol is R - OH R - CH<sub>2</sub>OH R<sub>2</sub>CHOH R<sub>3</sub>COH
9 Which compound contains - OH in their molecule Alcohol Phenol Alcohol and phenol Ether
10 The elimination of hydrogen halide from adjacent carbon atoms is called Dehydrogenation Hydrogenation Dehydrohalogenation Hydrohalogenation
11 Ethyl bromide is formed by the reaction of HBr with Ethane Ethene Ethyne Propane
12 A carbon atom carrying a postitive charge and attached to three other atoms of groups is called Caronium ion Carbanion Oconium ion Carba ion
13 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
14 Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent A ketone An aldehyde An ether Water
15 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>
16 Any other aldehyde except formaldehyde on reaction with Grignard's will produce Secondary alcohol Primary alcohol Tertiary alcohol Aromatic alcohol
17 If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a primary alcohol Secondary alcohol Tertiary alcohol Aromatic alcohol
18 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
19 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
20 If Grignard reagent is allowed to react with another alkyl halide the main product is An alkane Cyclo alkane Alkyne An alkene
21 Ammonia like water also reacts with Grignard's reagent to give Alkane Alkene Alkyne Amide
22 By simply reacting Grignand's reagent with water we get An alkane Higher alkane An alkene An alkyne
23 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>
24 In which of the following reactions is the inorganic reagent acting as a nucleophile
25 Electronphilic substitution Electrophilic addition Free radical substitution Nuclephilic substitution
26 Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated
27 Dehydrohalogenation of alkyl halides produces Alcohol Alkane Alkene Alkyne
28 When metallic sodium in ether is heated with ethyl chloride, which alkane is formed Propane Ethane Iso-butane N-butane
29 Grignard's reagent on treatment with carbonyl compounds yield Pheonol Alcohol Alkane None of these
30 Grignard's reagent on treatment with dry CO2and HCI yields Ester Alcohol Carboxylic acid Aldehyde
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