haloalkanes-and-haloarenes-quiz-2

Haloalkanes And Haloarenes Quiz-2

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. The alkyl group of Grignard reagent acts as:

•  Free radical
•  Carbonium ion
•  Carbanion
•  None of these

Solution
(c) Carbanion 

Q2.Ethylene dichloride can be prepared by adding HCl to:

•  Ethane
•  Ethylene
•  Acetylene
•  Ethylene glycol

Solution

Q3. The reaction products of the reaction between C₆ H₅ NH₂, CHCl₃ and KOH are: 

•  C₆ H₅ NC+KCl
•  C₆ H₅ OH+NH₄ Cl+H₂ O
•  C₆ H₅ Cl+NH₄ Cl+KCl
•  C₆ H₅ CN+KCl

Solution
(a)C₆ H₅ NC+KCl

Q4. Which process does not occur during formation of CHCl₃ from C₂ H₅ OH and bleaching powder?

•  Hydrolysis
•  Oxidation
•  Elimination
•  Chlorination

Solution
(c) CaOCl₂+H₂ O⟶Ca(OH)₂+Cl₂(Hydrolysis) Cl₂+C₂ H₅ OH⟶CH₃ CHO (Oxidation) CH₃ CHO+Cl₂⟶CCl₃ CHO (Substitution) CCl₃ CHO+Ca(OH)₂⟶CHCl₃+(HCOO)₂ Ca (Hydrolysis)

Q5.In order to convert aniline into chlorobenzene the reagent used is

•  NaNO₂/HCl,CuCl
•  Cl₂/CCl₄
•  Cl₂/AlCl₃
•  CuCl₂

Solution
  (a) NaNO₂/HCl,CuCl 

Q6. 

•  Acetaldehyde
•  Ethyl alcohol
•  Acetone
•  Methane

Solution
 

Q7.Carbylamines test is performed by heating alc. KOH with:

•  CHCl₃ and Ag
•  Trihalogenated methane and primary amine
•  CH₃ Cl and C₂ H₅ NH₂
•  RCN and RNH₂

Solution

(b) 4C₂ H₅ Br+4Na – Pb⟶ (C₂ H₅ )₄ Pb+4NaBr

Q8.Grignard reagent is not prepared in aqueous medium but prepared in either medium, because

•  the reagent is highly reactive in ether
•  the reagent does not react with water
•  the reagent becomes inactive in water
•  the reagent reacts with water

Solution
(d) Grignard reagents are highly reactive and react with any source of proton to give hydrocarbons. It is therefore necessary to avoid even traces of moisture from a grignard reagent.  

Q9.The greater the ionic character of the carbon metal bond:

•  The more reactive is the organometallic compound
•  The less reactive is the organometallic compound
•  Both are correct
•  None of the above is correct

Solution

(a) The more reactive is the organometallic compound

Q10. Fires result from the combustion of alkali metals can be extinguished by:

•  CCl₄
•  Sand
•  Water
•  Kerosene

Solution

(a) CCl₄ is fire extinguisher used under the name pyrene.