Which of the following molecules has a chiral centre correctly labelled with an asterisk (*) ?

Which of the following alcohols will not undergo oxidation?

A voltaic cell is made by connecting two half cells represented by half equations below: $$\begin{aligned} & \mathrm{Sn}

Four half reactions I to IV are shown below: I. $$2 \mathrm{Cl}^{-} \rightarrow \mathrm{Cl}_2+2 \mathrm{e}^{-}$$ II. $$4

Which property of transition metals enables them to behave as catalysts?

In the two tetrahedral structures of dichromate ion

1 mole of liquid A and 2 moles of liquid $$B$$ make a solution having a total vapour pressure 40 torr. The vapour pressu

Which of the following would not be a good choice for reducing nitrobenzene to aniline?

If molality of a dilute solution is doubled, the value of the molal elevation constant $$\left(\mathrm{K}_{\mathrm{b}}\r

Hydrolysis of sucrose is called

Which one of the following has lowest $$\mathrm{pK}_{\mathrm{a}}$$ value?

Which of the following cell was used in Apollo space programme?

The following experimental rate data were obtained for a reaction carried out at $$25^{\circ} \mathrm{C}$$ $$A_{(g)}+B_{

The magnetic moment of $$\left[\mathrm{NiCl}_4\right]^{2-}$$ [Atomic number : $$\mathrm{Ni}=28$$ ]

Assertion (A): Proteins are polymers of $$\alpha$$-amino acids connected by a peptide bond. Reason (R): A tetrapeptide c

Assertion (A): For a zero order reaction the unit of rate constant and rate of reaction are same. Reason (R) : Rate of r

Assertion (A): Acetic acid but not formic acid can be halogenated in presence of red $$\mathrm{P}$$ and $$\mathrm{Cl}_2$

Assertion (A): Trans $$\left[\mathrm{Cr} \mathrm{Cl}_2(\mathrm{ox})_2\right]^{3-}$$ shows optical isomerism. Reason (R):

(a) (i) What should be the signs (positive/ negative) for $$\mathrm{E}_{\text {Cell }}^0$$ and $$\Delta \mathrm{G}^0$$ f

What happens to the rate constant $$k$$ and activation energy $$E_a$$ as the temperature of a chemical reaction is incre

(a) Which of the following species cannot act as a ligand? Give reason. $$\mathrm{OH}^{-}, \mathrm{NH}_4^{+}, \mathrm{CH

Why is boiling point of o-dichlorobenzene higher than p-dichlorobenzene but melting point of para isomer is higher than

For the pair phenol and cyclohexanol, answer the following (a) Why is phenol more acidic than cyclohexanol? (b) Give one

(a) (i) Draw the zwitter ion structure for sulphanilic acid. (ii) How can the activating effect of $$-\mathrm{NH}_2$$ gr

Give the reaction of glucose with hydrogen cyanide. Presence of which group is confirmed by this reaction?

(a) For the reaction $$2 \mathrm{~N}_2 \mathrm{O}_{5(\mathrm{~g})} \rightarrow 4 \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}

(a) On the basic of crystal field theory write the electronic configuration for $$\mathrm{d}^5$$ ion with a strong field

(a) Illustrate Sandmeyer's reaction with an equation. (b) Explain, why $$\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$$ is m

Give reasons for any 3 of the following observations: (a) Penta-acetate of glucose does not react with hydroxylamine. (b

(a) (i) Why is the $$\mathrm{C}-\mathrm{O}$$ bond length in phenols less than that in methanol? (ii) Arrange the followi

Read the passage carefully and answer the questions that follow : Nucleophilic Substitution Nucleophilic Substitution re

Rahul set-up an experiment to find resistance of aqueous $$\mathrm{KCl}$$ solution for different concentrations at $$298

(a) (i) Why is boiling point of $$1 \mathrm{~M} \mathrm{~NaCl}$$ solution more than that of $$1 \mathrm{M}$$ glucose sol

(a) (i) Write the reaction involved in Cannizaro's reaction. (ii) Why are the boiling point of aldehydes and ketones low

(a) Why is chemistry of actinoids complicated as compared to lanthanoids? (b) Complete the following reaction and justif