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Hydrocarbons Quiz-8

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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. Which cannot be prepared by Kolbe’s electrolytic reaction using single salt?
  •  CH4
  •  C2 H6
  •  C4 H10
  •  H2
Solution
(a) CH4 cannot be prepared by Kolbe’s electrolysis; HCOONa gives H2 and CH3 COONa gives CH4.  

Q2.1-propanol on dehydration with H2 SO4 produces:
  •  CH3-CH=CH2
  •  CH3-CH=CH-CH3
  •  CH3 CH2 CH2 OCH2 CH2 CH3
  •  CH3 CH2 CH2 CH2 CH=CH2
Solution
(a)CH3-CH=CH2

Q3. Which of the following reactions can be used to prepare methane? 
  •  Clemmensen reduction
  •  Wurtz reaction
  •  Reduction of CH2=CH2 by LiAlH4
  •  Reduction of methyl iodine by using a zinc-copper couple
Solution
(d) Reduction of methyl iodine by using a zinc-copper couple

Q4. Which of the following acid reacts to reverse the Markownioff’s rule?
  •  HCl
  •  HBr
  •  HF
  •  HI
Solution



Q5.CH4 is formed when:
  •  Sodium acetate is heated with soda lime
  •  Iodo methane is reduced
  •  Aluminium carbide reacts with water
  •  All of the above
Solution
 

 

Q6. A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline KMnO4. The gas is
  •  C2 H6
  •  CH4
  •  C2 H2
  •  C2 H4
Solution


 

Q7.Addition of O2 on ethylene in presence of Ag at 200°C forms:
  •  Epoxy ethane
  •  Oxiranes
  •  Cyclic ethers
  •  All of these
Solution



Q8.Which one of the following methods is neither meant for the synthesis nor for separation of amines?
  •  Curtius reaction
  •  Wurtz reaction
  •  Hofmann method
  •  Hinsberg method
Solution


 

Q9.Hydrocarbon which is liquid at room temperature is
  •  Pentane
  •  Butane
  •  Propane
  •  Ethane
Solution
(a) Pentane

Q10. Soda lime is used extensively in decarboxylation reaction to obtain alkanes. Soda lime is:
  •  NaOH
  •  NaOH and CaO
  •  CaO
  •  Na2 CO3
Solution
(b) Soda lime (NaOH + CaO) is used to slow down the decarboxylation otherwise the reaction will occur violently.


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