ECAT Chemistry Online Test With Answers

ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Aldehydes are produce in atmosphere by Oxidation of secondary alcohols Reduction of alkenes Reaction of oxygen atoms with hydrocarbons Reaction of oxygen atoms with ozone
2 Propyne on hydrolysis in presence of H2SO4and HgSO4gives Acetaldehyde Acetone Formaldehyde None
3 Tollen's reagent is Ammonical cuprous chloride Ammonical cuprous oxide Ammonical silver bromide Ammonical silver nitrate
4 Which of the following reactions is used for detecting presence of carbonyl group? Reaction with hydroxylamine Reaction with hydrazine Reaction with phenyl hydrazine All
5 Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH4or LiAIH4? 1-propanol 2-propanol 2-Methyl-2-propanol Ethanol
6 Calcium acetate when dry distilled gives Formaldehyde Acetaldehyde Acetone Acetic anhydride
7 Isopropyl alcohol on oxidation forms Acetone Ether Ethylene Acetaldehyde
8 When alcohol reacts with concentreated H2SO4intermediate compound formed as carbonium ion alkoxy ion alkyl hydrogen sulphate non of these
9 The only alcohol that can be prepared by the indirect hydration of alkene is ethyl alcohol propyl alcohol isobutyl alcohol methyl alcohol
10 Which more acidic? o-cresol p-nitrophenol phenol m-cresol
11 During dehydration of alcohols to alkenes by heating with conc. H2SO4, the initial step is Formation of an ester Protonation of alcohol molecule Formation of carbocation Elimination of water
12 Organic acid without a carboxylic acid group is Ascorbic acid Vinegar Oxalic acid Picric acid
13 An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B . Compound B gives blue colour salt in Victor Meyer's test.The compounds A and B are respectively Acetaldehyde, tertiary butyl alcohol Acetaldehyde, ethyl alcohol Acetaldehyde, isopropyl alcohol Acetone, isopropyl alcohol
14 3 moles of ethanol react with one mole of phosphorus tribromide to from 3 moles of bromoethane and on mole of X. Which of the following is X? H<sub>3</sub>PO<sub>4</sub> H<sub>3</sub>PO<sub>2</sub> HPO<sub>3</sub> H<sub>3</sub>PO<sub>3</sub>
15 A compound is soluble in conc. H2SO4, it does not decolourise bromine in carbon tetrachloride but is oxidized by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is Primary alcohol Tertiary alcohol alkene ether
16 A compound of the formula C4H10Oreacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is Diethyl ether n-Butyl alcohol Isobutyl alcohol sec-Butyl alcohol
17 Which of the following is correct? Reduction of any aldehyde gives secondary alcohol Reaction of vegetable oil with H<sub>2</sub>SO<sub>4</sub>gives glycerine Alcoholic iodine with NaOH gives iodoform Sucrose on reaction with NaCl gives invert sugar
18 Which of the following compound is obtained on passing ethanol vapours on heated Al2O3? Ethylether Acetone Ethane Ethanol
19 When ethylene glycol is heated with acidified potassium permanganate, the main organic compound obtained is Oxalic acid Glyoxal Formic acid Ethanol
20 Propanone is the product obtained by dehydrogenation of 2-Propanol 1-Propanol Isobutyl alcohol Propanethoil
21 Picric acid is 2, 4, 6-Trinitrotoluene 2, 4, 6-Tribomoethanol 2, 4,6-Trinitrophenol Para-Nitrophenol
22 Na reacts with phenol to produce H<sub>2</sub>gas Benzene CO<sub>2</sub>gas CO gas
23 Which of the following is the most suitable method for removing the traces of water from ethanol? Reacting with Na metal Passing dry HCl through it Distilling it Reacting with Mg
24 Which of the following will not give iodoform test? Ethanol Ethanal Isopropyl alcohol Benzyl alcohol
25 Phenol gives ---------- Colour with neutral FeCl3solution Violet Green Red Blue
26 Ethylene reacts will 1% cold alkaline KMnO4to give Oxalic acid Acetone Ethylene glycol Formaldehyde
27 Which of the following compound is known as oil of winter green? Phenyl benzoate Phenyl salicylate Phenyl acetate Methyl salicylate
28 The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called Kolbe's reaction Perkin's reaction Sandmeyer's reaction Schotten Baumann reaction
29 I-Phenylethanol can be prepared by reaction of benzaldehyde with Methyl iodide an Magnesium Methyl bromide Methyl bromide and AIBr<sub>3</sub> C<sub>2</sub>H<sub>5</sub>l and Mg
30 An organic compound 'X' on treatment with acidified K2Cr2O7gives a compound 'Y' which reacts with I2and sodium carbonate to form Triodomethane. The compound 'X' is CH<sub>3</sub>OH CH<sub>3</sub>CHO CH<sub>3</sub>CH(OH)CH<sub>3</sub> CH<sub>3</sub>COCH<sub>3</sub>
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