ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 The molecule of ethane possess which hybrization sp<sup>3</sup> sp<sup>2</sup> sp sp<sup>2</sup>d
2 Acetylene is used in the manufacture of Rubber Plastic Ethyle alcohol All of these
3 Acetylene when treated with 10% H2SO4in the presence of HgSO4adds one molecule of water to form Aldehydes Esters Alcohols Acids
4 Which gas is used for welding purposes Butane Nitrogen Methane Acetylene
5 Which gas is produced by treating CaC2with water Methane Ethane Acetylene HCI
6 Which of the following decolorized Br2-water Methane Ethane Ethene Propane
7 Ethylene decolorizes cold dilute solution of KMnO4. This test is known as Colouration test Baeyer's test Silver mirror test Ring test
8 Ethylene polymerizes at 100 atm pressure and 400°C to give Polybenzene Polyalcohol Polypropylene Polyethylene
9 C18and onward hydrocarbons are normally Gases Liquids Solids Plasma
10 Ethylene combines with water in the presence of H2SO4+ HgSO4and forms Ethyle chloride Ethyle alcohol Carboxylic acid None of these
11 Alkenes combine readily with electrophillic reagents such as halogens giving Haloalkanes Gem-dihalides Vicinal dihalides Vinyl halides
12 The elimination of HX from adjacent carbon atoms is called Halogenations Hydrohalogenation Dehydrohalogenation Hydration
13 Ethylene can be prepared in the laboratory by heating together ethyl alcohol and HCI Phenol HF H<sub>2</sub>SO<sub>4</sub>
14 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
15 Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to Alkynes Alkenes Alkanes Alcohol
16 Zn + HCI are used in Clemenson reduction Wof kishner reduction Kolb's electrolysis Wutruz reaction
17 In CH4, all the H-C-H bond angles are 120° 107° 109° 109.5°
18 Alkenes normally have ______ geometry Tetrachedral Linear Planer None
19 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>
20 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
21 Sp3hybird orbitals are oriented at an angle of 107.5° 108.5° 109.5° 103.5°
22 When acetylene is passed through a copper tube at 300°C, it polymerizes to Polyacetylene polyethylene Benzene None of these
23 Nitroalkane are used in Fuel Solvents Organic synthesis All of them
24 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
25 Replacement of hydrogen by NO2group is called Sulphonatioin Hydration Nitration Cracking
26 Paraffins are also called Alkanes Alkynes Alkenes None of these
27 To differentiate isomers we use n- iso- neo All of them
28 Hydrocarbons are organic compounds which contain elements such as Hydrogen Carbon Hydrogen and carbon Halogens
29 Which is the used as test for the presence of alkenes Reaction of cold dilute alkaline KMnO<sub>4</sub> Combustion Polymerization Catalytic hydrogenation
30 The temp. used for the hydrogenation of alkenes using Ni is 2000°C 400°C 200-- 300°C 1000°C
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