Organic Reaction Concepts include: Displacement and nucleophilic substitution reactions, organic compound mechanism, elimination reactions, redox reactions,  photochemistry, nucleophiles, electrophiles, bond cleavage, reaction intermediates and kinetics. Here are some concepts related to organic reactions: Elimination reactions: Involves the elimination of two substituents from a molecule in one or two steps. Most elimination reactions result in the loss of at least one hydrogen atom and form double bonds. Substitution reactions: Involves the substitution of one atom for another. Addition... Show more

Organic Reaction Concepts include: Displacement and nucleophilic substitution reactions, organic compound mechanism, elimination reactions, redox reactions,  photochemistry, nucleophiles, electrophiles, bond cleavage, reaction intermediates and kinetics.

Here are some concepts related to organic reactions:
Elimination reactions: Involves the elimination of two substituents from a molecule in one or two steps. Most elimination reactions result in the loss of at least one hydrogen atom and form double bonds.
Substitution reactions: Involves the substitution of one atom for another.
Addition reactions: Involves the addition of an atom to a compound with double or triple bonds.
Isomerism: An important topic in organic chemistry. In most organic reactions, the products are formed based on the concept of isomerism.
Resonance: An essential aspect of organic chemistry. If the electron pattern of a molecule cannot be described with the help of one Lewis structure, it is called a resonance hybrid.
Aryl radicals: Versatile synthetic intermediates in organic chemistry. They also play roles in biology, such as in the DNA cleavage process. 

Organic reactions are generally slower than inorganic reactions because organic compounds contain covalent bonds. Covalent bonds are typically harder to break. Most organic reactions are carried out in multiple steps. 

Show less

Organic Chemistry Practice Test: Organic Reaction Concepts

Time left 00:00

25 Questions

1. In which reaction product formation takes place by hoffmann rule?

I, II, III and IVI, II and IIII and IIII and III

2. How many moles of KCI are required to produce 10 mol Cl₂ by the reaction with KCIO₃?

16.66 mole1.66 mole0.66 mole13.33 mole

3. Which halogen nucleophile is weakest in polar, aprotic solvents?

I–Cl–F–Br–

4. Electrons movement take place from __________

positively to negatively componentscharged species to neutralneutral to charged speciesnegatively to positively charged components

5. A 0.1 M solution of compound A shows 50% transmittance when a cell of 1 cm width is used at λ₁ nm. Another 0.1 M solution of compound B gives the optical density value of 0.1761 using 1cm cell at λ₁ nm. What will be the transmittance of a solution that is simultaneously 0.1 M in A and 0.1 M in B using the same cell and at the same wave length? [log 1.301; log 1.4771; log 50 = 1.699].

50%33.3%66.7%70%

6. Which of the following statement is true about the reaction given below?

It proceeds via a concerted SN1 pathwayThe rearrangement is due to SN1 reaction mechanismIt involves a carbocation intermediateIt proceeds via a concerted SN2 pathway

7. Which of the following cannot react as a nucleophile?

CH3NH2(CH3)3N(CH3)2NH(CH3)4N+

8. Among the following reactions, which one is incorrect?

9. How many moles of KMnO₄ are required for complete oxidation of 1.25 mol Cu₂S?
Cu₂S → Cu⁺² + SO₂

5 moles2 moles1 mole3 moles

10. Which of the following is most stable intermediate?

11. Which energy is required for heterolytic cleavage?

QuadrupletTripletSingletDoublet

12. What will be the number of products (excluding stereoisomers) in the given reaction?
C₆H₅CHO + CH₃-CHO + NaOH → Product

TwoThreeOneFour

13. How would you synthesis the following reaction?

conc. HNO3anhydrous AlCl3 + Ph-NO2conc. H2SO4 + Oleumconc. HNO3 + conc. H2SO4

14. Which of the following statement (s) is/are true about the following eliminations?

(1) Hoffmann product is major product in I (2) Saytzeff product is major product in I (3) Hoffmann product is major product in II (4) Saytzeffproduct is major product in II

3 and 42 and 31 and 21 and 4

15. Which of the following aromatic compounds undergo Friedel–Crafts alkylation with methyl chloride and aluminum chloride?

TolueneNitrobenzeneBenzoic acidAniline

16. Which of the following is not true about nucleophile?

nucleophile are Lewis acids by definitionall molecules or ions with a free pair of electrons or at least one pi bond can act as nucleophilesdonates an electron pair to an electrophile to form a chemical bonda nucleophile becomes attracted to a full or partial positive charge

17. Identify correct step representing S_N1 mechanism for the cleavage of ether with HI.

2 and 41 and 42 and 31 and 3

18. When the all-cis isomer of C₆H₆Cl₆ (2, 3, 4, 5, 6-Hexachlorocyclohexane) is heated with alc.KOH, what will be the most probable product?

19. Arrange the following intermediate into decreasing order of stability.

III > IV > II > III > III > IV > II > III > IV > III > III > II > IV

20. What will be the product for the given reactant and reagents?

21. The rate law for a reaction between the substances A and B is given by rate = K[A]n [B]m. On doubling the concentration of A and halving the concentration of B. What will be the ratio of the new rate of the earlier rate of the reaction?

m+n(\(\frac{1}{2}\))m+n2n-mn-m

22. Which of the following statement is correct?

In E2 elimination different stereoisomer (diastereomer) converts into different stereo productE2 is a concerted reaction in which bonds break and new bonds form at the same time in a single stepOrder of reactivity of alkyl halides towards E2 dehydrohalogenation is found to be 3o > 2o > 1oAll of the mentioned

23. In the given molecule where will electrophile will attack?

IIIIVIII

24. Which of the following is the product for the given reaction?

3,5-Dibromophenol3-Bromophenol2,4,6-Tribromophenol4- Bromophenol

25. Which incorrect about alkyl bromide having molecular formula C₅H₁₁Br?

Only one is incapable of reacting by the E2 mechanismOnly one isomer gives a single alkene on E2 elimination2-Bromopentane gives the most complex mixture of alkenes on E2 eliminationOne isomeric alkyl bromide undergoes E1 elimination at the fastest rate