Synthesis of Aldehydes or Ketones from Hydrocarbons
Trending Questions
Q. One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having molecular mass of 44g/mol. The alkene is:
- propane
- 1-butene
- 2-butene
- ethene
Q.
How is benzoyl chloride converted into benzaldehyde? Name the reaction
Q. Benzaldehyde cannot be prepared by which of the following reactions?
Q. Acetaldehyde and excess ethyl alchohol reacts in presence of dry HCl gas. The product obtained is :
- CH3CH2CH2OH
- CH3−CH(OH)−CH3
- CH3−CH(OH)−C2H5
- CH3CH(OC2H5)2
Q. Identify the number of reactions that can give benzene as a major product :
Q. Phenol on treatment with diethyl sulphate in the presence of NaOH gives:
- Salicylaldehyde
- Anisole
- Diphenyl ether
- Diethyl ether
Q.
Addition of bromine on propene in presence of Brine yields a mixture of
Q. R−C≡Nreagent−−−−→R−CHO, reagent can be:
- SnCl2/HCl/H2O
- Pd−BaSO4/ boiling xylene
- Both 1 and 2
- DIBAL−H, H+/H2O
Q. In the following carbocation, H/CH3 that is most likely to migrate to the positively charged carbon is:
- CH3 at C-4
- H at C-4
- CH3 at C-2
- H at C-2
Q.
Which are the starting materials for the preparation of
Any of the three
Q. what is the graph of Sn1 reaction and Sn2 reaction?
Q.
Acetylene and hydrogen cyanide is passed through a red hot tube 2:1 to form _________.
Q. Which of the following is not expected to be intermediate of the following reaction?
Q.
The stability of benzene diazonium salts is because of
Inductive effect
Hyperconjugation
Resonance
Mesomeric effect
Q. In which of the following reactions product will be aldehyde?
- CH3CH2CH2OHPCC in CH2Cl2−−−−−−−−−→
- CH3−C≡CHH2SO4−−−−→HgSO4
- Both (a) and (b)
Q. Write the equations involved in the following reactions:
(i) Reimer - Tiemann reaction
(ii) Williamson synthesis
(i) Reimer - Tiemann reaction
(ii) Williamson synthesis
Q. Which one of the following reagent(s) can be used to oxidise primary alcohols to aldehydes?
- CrO3 in anhydrous medium
- KMnO4 in acidic medium
- Pyridium chlorochromate
- Heat in presence of Cu at 573K
Q. Which of the following compounds is formed on ozonolysis followed by hydrolysis of but-2-ene?
- Acetaldehyde
- Acetone and Acetaldehyde
- Acetone and formaldehyde
- Butyric acid
Q.
Which of the following resonance structure is not a contributor to the cyclohexadienyl cation intermediate in the nitration of benzene?
None of the above (all are contributors)
Q. In the reaction,
Q.
What is the end product in the following sequence of reactions ?
Acetamide 
A 
B
Ethylamine
Ammonium acetate
Methylamine
Methyl isocyanide
Q. Aniline on treatment with aqueous bromine gives:
- 2, 4 dibromoaniline
- o-bromoaniline
- p-bromoaniline
- 2, 4, 6-tribromoaniline
Q. Reductive ozonolysis of ethene produces
- ethanal
- methanal
- ethanal and methanal
- acetone
Q. In which of the following reaction, acetaldehyde is not produced -
- CH2=CH−CH=CH2O3−−−−−→Zn/H2O
- HC≡CH+H2OHgSO4−−−−→H2SO4
- CH3COCl+H2Pd−−−−→BaSO4
Q. The reaction 2o3----> 3o2 proceeds as follows
o3 <====>o2+o (fast)
o+o3 <====>2o2 (slow)
the rate law expression for the reaction would be
1) r=k[o3]^2
2) r= k[o3]^2 [o2]^-1
3) r= k[o3] [o2]
4) r= [o2]^1
Q. 40. Which one of the following compounds will give dimethyl glyoxal with SeO2? a)acetone b)acetophenone c)ethyl methyl ketone d)propanaldehyde
Q.
1, - 2 Diethylbenzene on ozonolysis gives.... different products
1
2
3
4
Q. Which of the following reagents can be used in the following conversion?
Butan-1-ol→Butanoic acid
Butan-1-ol→Butanoic acid
- Tollen's reagent
- Fehling's reagent
- Jone's reagent
- NaBH4
Q. In the preparation of Grignards reagent the use of iodine is a) to lower down the temperature b) to prevent reverse reaction c) to remove impurities d) as a catalyst
Q. mA+nB----->products follows second order reaction, when either two reac†an ts with same concentration derive integrated rate law equations
