| 1 |
Which of the following is most stable. |
Teriary radical
Primary radical
Secondary radical
Methyl radical
|
| 2 |
What type of bond cleavage occurs in the initation step |
Homolytic
Ionic
Heterolytic
Covalent
|
| 3 |
Chlorinatin of propane gives how many thpes of monochlorinated products. |
1
2
4
3
|
| 4 |
Which of the following is not a free radical |
CH3
Cl+
O2
NO+
|
| 5 |
The termination step in a radical chain reaction involves. |
Chain breaking
Light absorption
Chain initiation
Hydrogen abstraction
|
| 6 |
Free radical reactions typically occur in |
Aromatic hydrocarbons
Saturated alkanes
Unsaturated alkenes
Alcohols
|
| 7 |
What is the first step in the free radical mechanism. |
Termination
Propagation
Initiation
Elimination
|
| 8 |
Which condition is essential for halogenation of methane. |
UV light
Acid catalyst
Heat only
Presence of water
|
| 9 |
Alkanes react with halogens via. |
Electrophilic substitution
Free radical substution
Nucleophilic addition
Electrophilic addition
|
| 10 |
The molecule of ethyne contains how many pi bonds. |
2
1
3
0
|
| 11 |
The bond angle in ethene is approximately |
109. 5 <sup>o</sup>
180. 5 <sup>o</sup>
120. <sup>o</sup>
90. <sup>o</sup>
|
| 12 |
The structure of methane contains how many sigma bonds. |
1
3
4
2
|
| 13 |
Which compound is a cycloalkane. |
Butene
Cyclopentane
Benzene
Cyclopentane
|
| 14 |
What is the prefix for a three -carbon chain in IUPAC nomenclature. |
Eth-
Prop-
But-
Pent-
|
| 15 |
The shape of ethene molecule i due to |
Sp hybridiztion
Sp2 hybridization
Sp3 hybridization
d2 sp3 hybridization
|
| 16 |
What is the correct IUPAC name of CH3 CH= CH2? |
Propene
Propane
Ethene
Butene
|
| 17 |
The shape of the cethane molecule is. |
Planar
Tetrahedral
Linear
Trigonal planar
|
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