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MDCAT Chemistry Chapter 16 Alcohols and Phenols Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Which of the following factors does not affect the SN1 rate is | Nucleophilicity of the attacking nucleophile Stability of the carbonium ion Solvent system The nature of leaving group |
| 2 | In the transition state of S2 mechanism reaction with alkyl halides, which of the following orbital hybridization is involved | sp³ sp sp² dsp³ |
| 3 | Which of the following decides the reactivity of alkyl halides? | C-C bond strength C-H bond strength C-X bond strength Electronegativity difference |
| 4 | Chloroform (CHCl3) is? | Primary alkyl halide Secondary alkyl halide Tertiary alkyl halide a liquid |
| 5 | Which is a good nucleophile as well as a good leaving group? | F- Cl- Br- I- |
| 6 | An amine is produced in the following reaction C2H5l+2NH3-------C2H5NH2 +NH4l. What is mechanism? |
Electrophilic addition Electrophilic substitution Nucleophilic addition Nucleophilic substitution |
| 7 | The Sl mechanism for the hydrolysis of an alkyl halide to an alcohol involves the formation of | Carbocation Carbanion Pentavalent carbon in the transition state Free radical |
| 8 | SN2-reactions can be usually observed in | Primary alkylı halide secondary alkyl halide Tertiary alkyl halide Both A. and B |
| 9 | Alkyl halides are considered to be very reactive compounds towards nucleophiles, because | The have an electrophilic carbon They have an electrophilic carbon and a bad leaving group They have an electrophilic carbon and a good laving group They have a nucleophilic carbon and a good leaving group |
| 10 | The rate of E1 reaction depends upon | The concentration of substrate The concentration of substrate as well as nucleophile The concentration Nucleophilic Nature of Catalyst |
| 11 | For which mechanisms, the first step involved is the same | E1 and E2 E2 and SN2 E2 and E1 E1 and SN1 |
| 12 | The average bond energy of C-Br is | 228 kJmol-1 250 kJmol-1 200 kJmol-1 290 kJmol-1 |
| 13 | The carbon atom of an alkyl group attached with halogen atom is called | Electrophile Free redical Nucleophile Nucleophilic centre |
