In the given conformation C₂ is rotated about C₂-C₃ bond anticlockwise by an angle of 120° then the conformation obtained is

What is the decreasing order of stability of the carbocation ions?

Which is more acidic?

The correct order of basicities of the following compounds is:

(1)

(2) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{NH}}_2$

(3) ${\left({\mathrm{CH}}_3\right)}_2\mathrm{NH}$

(4) ${\mathrm{CH}}_3-\stackrel{\stackrel{\mathrm{O}}{\left|\right|}}{\mathrm{C}}-{\mathrm{NH}}_2$

Consider the acidity of the following carboxylic acids

(i) PhCOOH

(ii) o-NO₂C₆H₄COOH

(iii) p-NO₂C₆H₄COOH

(iv)m-NO₂C₆H₄COOH

The IUPAC name of   

Hybridisation of N in pyrrole  is

The most reactive of these compounds towards sulphonation is

In the above compound, arrange the nitrogen according to their decreasing basic strength.

 The correct stability order for the following species is:

The most stable carbanion among the following is-

The configuration of given tartaric acid is

The IUPAC name of the above mentioned compound is - 

Which of the following $\mathrm{\sigma }$-bonds participate in hyperconjugation?

Correct IUPAC name of the compound 

Correct IUPAC name of the compound  is

The IUPAC name of the following compound is

A hydrocarbon (R) has six membered ring in which there is no unsaturation. Two alkyl groups are atttached to the ring adjacent to each other. One group has 3 carbon atoms with branching at 1st carbon atom of chain and another has 4 carbon atoms. The larger alkyl group has main chain of three carbon atoms of which second carbon is substituted. Correct IUPAC name of compound (R) is

Identify the structure of x,

In which reaction a chiral reactant is giving a chiral product.

Choose the correct statement among the following

The correct stability order of following species is :

Which of the following does not represent the resonating structure of

Ordinarily the barrier to rotation about a carbon-carbon double bond is quite high but in compound P double bond between two rings was observed by NMR to have a rotational energy barrier of only about 20 cal.\mol., showing that it has lot of single bond charcter. The reason for this is

The most contributing structure in nitroethene among the following is-

In which of the followig molecules all the effects namely inductive, mesomeric and hyperconjugation operate ?

The acid strength order is:

Acid strength of the conjugate acids of the following are-

The acid dissociation constants of the following acids are given as under:

Compound K_a CICH₂COOH 136 × 10^–5 139 × 10^–5 8.9 × 10^–5 2.96 × 10^–5 CH₃CHCH₂COOH 1.52 × 10^–5 From this data, the following observations can be made. Mark the correct statements for above mentioned compounds.

(i) The above variation in acidities of the above acids are due to inductive effect only.

(ii) The above variation are both due to inductive and resonance effects.

(iii) Inductive effect varies sharply with distance.

(iv) –I effect of chlorine is not much.

If is mixed with NaOH solution. Acid base reaction occurs and HO- snatches H+ from organic molecule. Which carbon will loose H easily?