Alkyl-Hallide-and-Aryl-Hallide-Quiz-5

Alkyl Hallide and Aryl Hallide Quiz-5

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. Following is the substitution reaction in which –CN replaces –Cl. To obtain propanenitrile, R – Cl

should be

•  Chloroethane
•  1-chloropropane
•  Chloromethane
•  2-chloropropane

Solution

Q2.Monohalogen derivative of alkanes with alcoholic KOH gives:

•  Alkane
•  Alkene
•  Alkyne
•  Alicyclic hydrocarbon

Solution
Elimination reaction.

Q3.  Isobutyl magnesium bromide with dry ether and absolute alcohol gives:

•   
•  
•  
•  

Solution

Q4. Methyl chloride on treatment with potassium cyanide followed by hydrolysis yields:

•  HCOOH
•  
•  
•  

Solution

—CN group hydrolyses to —COOH.

Q5.Fluorobenzene can be synthesised in the laboratory

•  By heating phenol with HF and KF
•  From aniline by diazotisation followed by heating the diazonium salt with 
•  By direct fluorination of benzene with  gas
•  By reacting bromobenzene with NaF solution

Solution
 From aniline by diazotisation followed by heating the diazonium salt with 

Q6. Chloroform, when kept open, is oxidised to

•  
•  
•  
•  None of these

Solution
Chloroform is oxidised to a poisonous gas(), phosgene by atmospheric oxidation.

Q7.Ethyl bromide and isopropyl chloride can be distinguished by:

•  Alcoholic 
•  Comparing their colours
•  Burning the compound on spatula
•  Aqueous KOH solution

Solution
 gives yellow ppt. of AgBr whereas, gives white ppt. if AgCl.

Q8.The IUPAC name of the compound

, is:

•  1,3-dibromo-3-methylbutane
•  3-methyl-1,2-bromobutane
•  3-methyl-1,3-bromopropane
•  None of the above

Solution
1,3-dibromo-3-methylbutane

Q9.The reaction of toluene with in presence of gives predominantly

•  Benzoyl chloride
•  Benzyl chloride
•  o-and p-chlorotoluene
•  m-chlorotoluene

Solution
o-and p-chlorotoluene

Q10. The Mg—Br bond in  is:

•  Ionic
•  Non-polar
•  Covalent
• None of these

Solution
Ionic