ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give Benzene Cyclohexene Benzene Toluene
2 The geometry of acetylene is Angular Bent Trigonal Linear
3 The sp2hybird orbitals are oriented in space at one angle 180° 109.5° 100° 120°
4 The molecule of ethane possess which hybrization sp<sup>3</sup> sp<sup>2</sup> sp sp<sup>2</sup>d
5 Acetylene is used in the manufacture of Rubber Plastic Ethyle alcohol All of these
6 Acetylene when treated with 10% H2SO4in the presence of HgSO4adds one molecule of water to form Aldehydes Esters Alcohols Acids
7 Which gas is used for welding purposes Butane Nitrogen Methane Acetylene
8 Which gas is produced by treating CaC2with water Methane Ethane Acetylene HCI
9 Which of the following decolorized Br2-water Methane Ethane Ethene Propane
10 Ethylene decolorizes cold dilute solution of KMnO4. This test is known as Colouration test Baeyer's test Silver mirror test Ring test
11 Ethylene polymerizes at 100 atm pressure and 400°C to give Polybenzene Polyalcohol Polypropylene Polyethylene
12 C18and onward hydrocarbons are normally Gases Liquids Solids Plasma
13 Ethylene combines with water in the presence of H2SO4+ HgSO4and forms Ethyle chloride Ethyle alcohol Carboxylic acid None of these
14 Alkenes combine readily with electrophillic reagents such as halogens giving Haloalkanes Gem-dihalides Vicinal dihalides Vinyl halides
15 The elimination of HX from adjacent carbon atoms is called Halogenations Hydrohalogenation Dehydrohalogenation Hydration
16 Ethylene can be prepared in the laboratory by heating together ethyl alcohol and HCI Phenol HF H<sub>2</sub>SO<sub>4</sub>
17 When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as Cannizaro reaction Sabatier-secderens reaction Alkylation Kolbe's reaction
18 Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to Alkynes Alkenes Alkanes Alcohol
19 Zn + HCI are used in Clemenson reduction Wof kishner reduction Kolb's electrolysis Wutruz reaction
20 In CH4, all the H-C-H bond angles are 120° 107° 109° 109.5°
21 Alkenes normally have ______ geometry Tetrachedral Linear Planer None
22 The general formula of alkane is C<sub>n</sub>H<sub>2n+2</sub> C<sub>n</sub>H<sub>n</sub> C<sub>n</sub>H<sub>2n</sub> C<sub>2</sub>H<sub>2n-1</sub>
23 Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as Sabatier-senderens reaction kolbes reaction Cannizaro's reaction Haloform reaction
24 Sp3hybird orbitals are oriented at an angle of 107.5° 108.5° 109.5° 103.5°
25 When acetylene is passed through a copper tube at 300°C, it polymerizes to Polyacetylene polyethylene Benzene None of these
26 Nitroalkane are used in Fuel Solvents Organic synthesis All of them
27 The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called Isomerization polymerization Hybridization Resonance
28 Replacement of hydrogen by NO2group is called Sulphonatioin Hydration Nitration Cracking
29 Paraffins are also called Alkanes Alkynes Alkenes None of these
30 To differentiate isomers we use n- iso- neo All of them
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