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 The major reaction occurring in the engines of automobiles is Oxidation Reducing Combustion Decomposition
2 Complete combustion of alkane yields CO<sub>2</sub>+ H<sub>2</sub>O CO<sub>2</sub>+ heat CO + H<sub>2</sub>O heat CO<sub>2</sub>+ H<sub>2</sub>O + heat
3 the unreactivity of alkanes is based upon Inertness of sigma bond Non-polarity of the bonds Both A and B None of above
4 Physical properties of alkanes increase with increase of all physical constants except Boiling points Melting points Density Solubility
5 Alkanes are soluble in all except Benzene Ether Water Carbon tetra chloride
6 Alkanes containing carbon C18ownwards are Gases Liquids Waxy solids Solids
7 The method used only for the production of symmetrical alkanes Kolb's method Clemmenen Cannizzaro Wolf kishner
8 The reaction in which ketone is reduced to the alkane is called Kolb Clemmensen Cannizzaro None
9 Kolb's method has limited synthetic applications due to Expensive catalysis Slow reaction Number of side products produced Salts used are very expensive
10 Kolb's method is not useful for the production of Methane Ethane Propane Butane
11 Kolb's method of alkanes production, is actually Hydrolysis Catalysis Electrolysis Hydrogenation
12 The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is Hydrolysis Electrolysis Hydrogenation Hydrogenolysis
13 An alkane is produced when an alkyle halide reacts with zinc in the presence of HCl CH<sub>3</sub>COOH Both a &amp; b None
14 During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be H<sub>2</sub>SO<sub>4</sub> Ni Fe<sub>2</sub>O<sub>3</sub> Al<sub>2</sub>O<sub>3</sub>
15 CnH2nis the general formula of Alkanes Alkanes alkynes None of above
16 Write the name of following alkene CH2= CH - CH = CH2 1,3 butadiene Butra -1, 3-diene Both a &amp; b None
17 Write the name of following compound 5 - methyle - 2- hexene 2 - methyle hexene 4 - ethyle - 2 - methyle hexene 3 - ethyle - 3 - methyl hexene
18 If we remove one hydrogen atom from an alkane we obtain a group called Acetyle group Formyle group Alkyle group Ketyle group
19 "Each different compound should have a different name" was published by IUPAC system of nomenclature in 1892 1830 1947 1979
20 Marsh gas was the name given to Methane Ethane Propane Butane
21 A salt producing hydrocarbon among these compounds is Ehyne Ethene Methane Ethane
22 An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be CH3 - CH = Ch2 CH3CH = CHCH3 HC = CH H2C = CH2
23 Hydrocarbon which is liquid at room temperature is Pentane Butane Propane Ethane
24 A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is 100 70 50 40
25 The reaction-method that does not give an alkane is Catalytic hydrogenation of alkanes Wurtz reaction Hydrolysis of alkyl magnesium bromide Dehydrohalogenation of an alkyl halide
26 Which of the following method is most appropriate for the manufacture of methane? By reduction of CH2CL2 Wurtz reaction Liquification of natural gas None of these
27 The addition of HBr is easiest with CH2 = CHCl CICH = CHCl CH3 - CH = CH2 (CH3)2 C = CH2
28 In Friedal-Craft's alkylation besides AlCl3 the other reactants are C6H6 + NH3 C6H6 + NH4 C6H6 + CH3Cl C6H6 + CH3COCl
29 For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to Hydrolysis Oxidation Hydrogenation Electrolysis
30 Octane number is zero for n-Heptane Isooctane n-Hexane Isoheptane
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