ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 During reaction of O2and alkenes, a product: Glycol Epxide Halohydrin Ethylene glycol
2 Hybridization in alkanes is: sp sp<sup>2</sup> sp<sup>3</sup> dsp<sup>2</sup>
3 Which is liquid among the following alkenes? Ethane Propene Butene Pentene
4 Eletronegativity difference in C-C bond in alkanes is: Zero Double Half 4.0
5 Alkanes are least reactive towards: Acids and bases Reducing agents Oxidizing agents All of these
6 Boiling point of n-butane is: -102<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°C</span> -75<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°C</span> -55<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°C</span> 55<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°C</span>
7 Alkanes are gases : C<sub>1</sub>-C<sub>4</sub> C<sub>5</sub>-C<sub>10</sub> C<sub>11</sub>-C<sub>15</sub> C<sub>10</sub>-C<sub>20</sub>
8 Alkyne is : CH<sub>3-</sub>CH<sub>3</sub> CH<sub>4</sub> CH<sub>2=</sub>CH<sub>2</sub> C<sub>2</sub>H<sub>2</sub>
9 Alkene general formula : C<sub>n</sub>H<sub>2n+2</sub> C<sub>n</sub>H<sub>2n</sub> C<sub>n</sub>H<sub>2n-2</sub> C<sub>n</sub>H<sub>2n+1</sub>
10 Odour of alkene is: Fruity Odourless Zarlic like Irritating
11 acetylene can be converted into-while passing through a Cu-tube at 300°C: Glyoxal Vinyl acetylene Vinyl alcohol Benzene
12 Which is more active ? Alkanes Alkenes Alkynes Benzene
13 Alkanes have functional group : ----X --OH ----COH No functional group
14 Free radical mechanism of halogenation of alkanes follow step: Initiation Propagation Termination All of these
15 Which is symmetric alkene? CH=C-CH<sub>2</sub> CH<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">≡CH</span> CH<sub>3</sub>-C<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">≡C - CH<sub>3</sub></span> B and C
16 Which decolourizes the colour of Br3 CH<sub>4</sub> CH<sub>3-</sub>CH<sub>3-</sub>CH<sub>3</sub> CH<sub>2=</sub>CH<sub>2</sub> CH<sub>3-</sub>CH<sub>3</sub>
17 Reaction of ethanes with KMnO4 gives: Ozonide Glyoxal Glycol Oxalic acid
18 Which one of the following gases is used for artificial ripening of fruits ? Ethane Ethyne Methane Propane
19 When methane reacts with Cl2in the presence of diffused light the products obtained are? Chloroform only Carbon tetrachloride only Chloromethane and dichloromethane Mixture of a,b,c
20 β-β- dichloroethyle sulphide is commonly known as: Mustared gas Laughing gas Phosgene gas Bio gas
21 Synthesis rubber is made by polymerization : Chloroform Acetylene Divinyl acetylene Butene
22 The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule: Hund's rule Markownikov's rule Pauli's Exclusion Principle Auf bau Principle
23 Vinyl acetylene combines with HCl to form: Polyacetylene Benzene Chloroprene Divinyl acetylene
24 The presence of a double bond in a compound in the sign of: Saturation Unsaturation Subsitution None
25 Formula of chloroform is: CH<sub>3</sub>Cl CCl<sub>4</sub> CH<sub>2</sub>Cl<sub>2</sub> CHCl<sub>3</sub>
26 Preparation of vegetable ghee involves: Halogenation Hydrogenation Hydroxylation Dehydrogenation
27 Coal is used to bake bricks in lime kiln: 40% 60% 80% None of these
28 In the presence of high temperature and pressure peat is converted to: Lignite Polymorphism Polymerization Catenation
29 Self linkage of carbon to produce long chains isomerism Polymorphism Polymerization Catenation
30 Wohler synthesized first of all the organic compound: Carbohydrates Urea Aniline Toluene
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