ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test With Answers

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ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test

Sr. # Questions Answers Choice
1 In CH4, all the H-C-H bond angles are 120° 107° 109° 109.5°
2 Alkenes normally have ______ geometry Tetrachedral Linear Planer None
3 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>
4 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
5 Sp3hybird orbitals are oriented at an angle of 107.5° 108.5° 109.5° 103.5°
6 When acetylene is passed through a copper tube at 300°C, it polymerizes to Polyacetylene polyethylene Benzene None of these
7 Nitroalkane are used in Fuel Solvents Organic synthesis All of them
8 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
9 Replacement of hydrogen by NO2group is called Sulphonatioin Hydration Nitration Cracking
10 Paraffins are also called Alkanes Alkynes Alkenes None of these
11 To differentiate isomers we use n- iso- neo All of them
12 Hydrocarbons are organic compounds which contain elements such as Hydrogen Carbon Hydrogen and carbon Halogens
13 Which is the used as test for the presence of alkenes Reaction of cold dilute alkaline KMnO<sub>4</sub> Combustion Polymerization Catalytic hydrogenation
14 The temp. used for the hydrogenation of alkenes using Ni is 2000°C 400°C 200-- 300°C 1000°C
15 What is not a common use of methane As a fuel For the preparation of haloaklanes For the preparation of methyl alcohol For the preparation of sulphuric acid
16 Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes Elemination Addition Free radical substitution Nucleophilic substation
17 The Total coal resources of Pakistan are estimated to be 184 billion 184 million tones 1.84 billion tounes 1.84 million tonnes
18 The hydrocarbons having double bonds normally end with suffix Ane Ene Yne Oic
19 Pent -1-ene-3-yne 2-pentyne-4-ene 1-pentene-3-yne Pent-2-yen-4-ene
20 The saturated hydrocarbons usually end with suffix ______ Ane Ene Yne Oic
21 2, 3-dimethylbutane 2, 3-methylbutane 2-dimethylbutane Dimethylbutane
22 Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon
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