AIPMT-PRELIMS Chemistry Organic Chemistry – Some Basic Principles & Techniques Class 11 Questions

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is:

Which of the following statements is not valid for oxoacids of phosphorus?

Which of the following acids does not exhibit optical isomerism?

Which nomenclature is not according to IUPAC system?

Among the following compounds the one that is most reactive towards electrophilic nitration is:

Predict the products in the given reaction

Name the type of the structure of silicate in which one oxygen atom of [SiO₄]⁴⁻ is shared?

In Dumas method of estimation of nitrogen, 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at 300 K = 15 mm)

Which one of the following is most reactive towards electrophilic reagent?

Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear?

The structure is:

In a set of reactions, ethyl benzene yielded a product D. 'D' would be

Which one is most reactive towards electrophilic reagent?

Which one of the following compounds has the most acidic nature?

Given are cyclohexanol (I), acetic acid (II), 2, 4,⁶⁻trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be

In the following the most stable conformation of n-butane is

The state of hybridization of C₂, C₃, C₅ and C₆ of the hydrocarbon,

Predict the product: [Diagram of reaction: NHCH₃ + NaNO₂ + HCl → Product]

The IUPAC name of the compound having the formula CH ≡ C – CH = CH₂ is:

Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

Consider the following reaction: Phenol → Zn dust → X → CH₃Cl Anhydrous AlCl₃ → Y → Alkaline KMnO₄ → Z. The product Z is:

Trichloroacetaldehyde, CCl₃CHO reacts with chlorobenzene in presence of sulphuric acid and produces:

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of -

Base strength of - (i) H₃C⊖CH₂ (ii) H₂C⊖CH and (iii) H⊖C≡C is in the order of -

How many stereoisomers does this molecule have ? CH₃CH=CHCH₂CHBrCH₃

Which one of the following is most reactive towards electrophilic attack ?

The stability of carbanions in the following : (i) R–C≡C⁻ (ii) <svg width="80" height="80" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" style="vertical-align: middle;"> <polygon points="40,20 70,37 70,72 40,89 10,72 10,37" fill="none" stroke="currentColor" stroke-width="3" stroke-linejoin="round"/> <line x1="18" y1="43" x2="18" y2="66" stroke="currentColor" stroke-width="2.5"/> <line x1="38" y1="80" x2="62" y2="66" stroke="currentColor" stroke-width="2.5"/> <line x1="62" y1="43" x2="38" y2="29" stroke="currentColor" stroke-width="2.5"/> <circle cx="82" cy="30" r="3" fill="currentColor"/> <circle cx="82" cy="40" r="3" fill="currentColor"/> <circle cx="82" cy="12" r="8" fill="none" stroke="currentColor" stroke-width="1.5"/> <line x1="77" y1="12" x2="87" y2="12" stroke="currentColor" stroke-width="2"/> </svg> (iii) R₂C=CH⁻ (iv) R₃C–CH₂⁻ is in the order of :

Acetophenone when reacted with a base, C₂H₅ONa, yields a stable compound which has the structure :

Which of the following complexes exhibits the highest paramagnetic behaviour ? (1) [Co(OX)₂ (OH₂)]⁻ (2) [Ti (NH₃)₆]³⁺ (3) [V(gly)₂ (OH₂)(NH₃)₂]⁺ (4) [Fe (en) (bpy) (NH₃)₂]²⁺ Where gly = glycinate, en = ethylenediamine and bpy = bipyridyl moieties (Atomic number Ti = 22, V = 23, Fe = 26, Co = 27)

In a reaction of aniline a coloured product (C) was obtained. The structure of (C) would be -

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

Consider the following compounds.

Predict the product C obtained in the following reaction of butyne^{-1}. $$\text{CH}_3\text{CH}_2 - \text{C} \equiv \text{CH} + \text{HCl} \longrightarrow \text{B} \xrightarrow{\text{HI}} \text{C}$$

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called

Which of the following represents the correct order of the acidity in the given compounds? FCH₂COOH > CH₃COOH > BrCH₂COOH > ClCH₂COOH

If there is no rotation of plane polarised light by a compound in a specific solvent, though to be chiral, it may mean that

CH₃—CHCl—CH₂—CH₃ has a chiral centre. which one of the following represents its R⁻configuration?

Identify the correct order of the size of the following: Ca²⁺ < K⁺ < Ar < Cl⁻ < S²⁻

Which of the compounds with molecular formula C5H10 yields acetone on ozonolysis?

The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol

Which of the following anions is present in the chain structure of silicates?

In the reaction: $$\text{CH}_3 - \overset{\substack{\text{CH}_3 \\ |}}{\text{CH}} - \text{CH}_2 - \text{O} - \text{CH}_2 - \text{CH}_3 + \text{HI} \xrightarrow{\text{Heated}}$$ Which of the following compounds will be formed?

The product formed in Aldol condensation is

Identify the incorrect statement among the following:

Which of the following is not chiral?

The IUPAC name of the given compound is:

Which amongst the following is the most stable carbocation?

Which one of the following pairs represents stereoisomerism?

Which one of the following compounds is most acidic?

The chirality of the compound