haloalkanes-and-haloarenes-quiz-10

Haloalkanes And Haloarenes Quiz-10

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry..

Q1. Compound ‘A’ reacts with alcoholic KOH to yield compound ‘B’ which on ozonolysis followed by reaction with Zn/H₂ O gives methanal and propanal. Compound ‘A’ is

•  1-propanol
•  1-butanol
•  1-chlorobutane
•  1-chloropentane

Solution

Q2.What is the product of the reaction of 1, 3-butadiene with Br₂?

•  1, 4-dibromo butene
•  1, 2- dibromo butene
•  3, 4- dibromo butene
•  2, 3- dibromo-2-butene

Solution

Q3.  

•  X=KCN, Y=LiAlH₄
•  X=KCN, Y=H₃ O⁺
•  X= CH₃ Cl, Y=AlCl₃/HCl
•  X= CH₃ NH₂,Y=HNO₂

Solution

Q4. Decomposition of benzene diazonium chloride by using Cu₂ Cl₂/HCl to form chlorobenzene is

•  Raschig’s reaction
•  Sandmeyer’s reaction
•  Kolbe’s reaction
•  Cannizaro’s reaction

Solution

Q5.The given reaction is an example of, C₂ H₅ Br+KCN(aq.)⟶ C₂ H₅ CN+KBr:

•  Elimination
•  Nucleophilic substitution
•  Electrophilic substitution
•  Redox change

Solution
  (b) Br is replaced by a nucleophile CN^-.  

Q6. Which of the following alkyl halide is used as methylating agent?

•  C₂ H₅ Cl
•  C₂ H₅ Br
•  C₂ H₅ I
•  CH₃ I

Solution
(d) RX are called alkylating agent. CH₃ X is methylating agent; C₂ H₅ X is ethylating agent.  

Q7.Tertiary alkyl halides are practically inert to substitution by S_N 2 mechanism because of

•  Steric hindrance
•  Inductive effect
•  Instability
•  Insolubility

Solution

Q8.Chloroform is used as an:

•  Antiseptic
•  Anaesthetic
•  Insecticide
•  Antipyretic

Solution
(b) Vapours of chloroform on inhaling causes unconsciousness.  

Q9.Chloretone used as a drug is prepared by the reaction of acetone with:

•  Chlorine
•  Ethyl chloride
•  Chloroform
•  Ethylene dichloride

Solution

(c) Chloroform

Q10. Which of the following compounds gives trichloromethane on distilling with bleaching powder?

•  Methanal
•  Phenol
•  Ethanol
•  Methanol

Solution

(c) Ethanol on reaction with bleaching powder, gives chloroform (trichloromethane). 

 CaOCl₂ + H₂ O → Ca(OH)₂ + Cl₂ 

 C₂ H₅ OH + Cl₂ → CH₃ CHO + 2HCl 

 CH₃ CHO + 3Cl₂ → CCl₃ .CHO + 3HCl 

 2CCl₃ .CHO + Ca(OH)₂ (in presence of Chloral)→ 2CHCl₃+(HCOO)₂ Ca 

                                                                                   chloroform