Hydro Carbons Quiz-15
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. Chloroform, on warming with Ag powder gives
Solution
(d)
HCCl3+6Ag+Cl3CH → HC≡CH+6AgCl
Chloroform choloroform acetylene Thus, in this reaction acetylene (HC≡CH) is produced.
(d)
HCCl3+6Ag+Cl3CH → HC≡CH+6AgCl
Chloroform choloroform acetylene Thus, in this reaction acetylene (HC≡CH) is produced.
Q2.Major product of the following reaction is: 
Solution
(b)
Follow Saytzeff’s rule for elimination.
(b)
Follow Saytzeff’s rule for elimination.
Q3. A fuel contains 25% n-heptane and 75% iso-octane. Its octane number is:
Solution
(b)
Octane number represents percentage of iso-octane.
(b)
Octane number represents percentage of iso-octane.
Q4. Which can be easily oxidized?
Solution
(b)
Among hydrocarbons, alkynes are easily oxidised.
(b)
Among hydrocarbons, alkynes are easily oxidised.
Q5. An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide?
Solution
(d)
In the formation of an alkane from Grignard reagent, alkyl group always comes from Grignard reagent. Hence, the number of carbon atoms in the Grignard reagent and alkane formed Grignard reagent will be identical. So, the original alkyl halide is propyl bromide.
(d)
In the formation of an alkane from Grignard reagent, alkyl group always comes from Grignard reagent. Hence, the number of carbon atoms in the Grignard reagent and alkane formed Grignard reagent will be identical. So, the original alkyl halide is propyl bromide.
Q6. Phenyl magnesium bromide reacts with methanol to give
Solution
(b)
PhMgBr can be protonated by any of the protic solvent e.g.,CH3OH.
(b)
PhMgBr can be protonated by any of the protic solvent e.g.,CH3OH.
Q7. What are the products obtained upon the ozonolysis of pent-2-ene?
Solution
(d)
(d)
Q8. During ozonolysis of CH_2=CH_2 if reduction is carried out by LiAlH_4 the products formed are:
Solution
(c)
(c)
Q9.The alkyne which gives pyruvic acid (CH3COCOOH) on oxidation with alk. KMnO4 is:
Solution
(b)
(b)
Q10. The major component of L.P.G. is:
Solution
(d)
L.P.G. mainly contains butane and isobutane.
(d)
L.P.G. mainly contains butane and isobutane.
