ECAT Chemistry Online Test With Answers

image
image
image

ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is Carboxylic acid > phenol > alcohol Carboxylic acid > alcohol > phenol Phenol > carboxylic acid > alcohol Alcohol > phenol > carboxylic acid
2 In Dow's method, phenol can be made from Chlorobenzene Benzene Toluene Benzene sulphonic acid
3 Methanol and ethanol can be distinguished by Iodoform test Iucas test Dichromate/H<sub>2</sub>SO<sub>4</sub>oxidation test Flame test
4 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
5 When sodium metal reacts with alcohols Hydrogen gas evolves Sodium hydroxide is obtained Alcohol is reduced Alcohol is polymerised
6 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
7 Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch Diastase Maltase Zymase Invertase
8 Which the increase in carbon number of solubility of an alcohol Increases Decreases Remains unaffected None of these
9 A primary alcohol A secondary alcohol An eher A phenol
10 Alcohols, phenols and ethers may be considered as derivative of Hydrocarbons Benzene Carboxylic acid Water
11 The formula of secondary alcohol is R - OH R - CH<sub>2</sub>OH R<sub>2</sub>CHOH R<sub>3</sub>COH
12 Which compound contains - OH in their molecule Alcohol Phenol Alcohol and phenol Ether
13 The elimination of hydrogen halide from adjacent carbon atoms is called Dehydrogenation Hydrogenation Dehydrohalogenation Hydrohalogenation
14 Ethyl bromide is formed by the reaction of HBr with Ethane Ethene Ethyne Propane
15 A carbon atom carrying a postitive charge and attached to three other atoms of groups is called Caronium ion Carbanion Oconium ion Carba ion
16 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
17 Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent A ketone An aldehyde An ether Water
18 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>
19 Any other aldehyde except formaldehyde on reaction with Grignard's will produce Secondary alcohol Primary alcohol Tertiary alcohol Aromatic alcohol
20 If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a primary alcohol Secondary alcohol Tertiary alcohol Aromatic alcohol
21 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
22 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
23 If Grignard reagent is allowed to react with another alkyl halide the main product is An alkane Cyclo alkane Alkyne An alkene
24 Ammonia like water also reacts with Grignard's reagent to give Alkane Alkene Alkyne Amide
25 By simply reacting Grignand's reagent with water we get An alkane Higher alkane An alkene An alkyne
26 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>
27 In which of the following reactions is the inorganic reagent acting as a nucleophile
28 Electronphilic substitution Electrophilic addition Free radical substitution Nuclephilic substitution
29 Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated
30 Dehydrohalogenation of alkyl halides produces Alcohol Alkane Alkene Alkyne
Download This Set
×