List of top Chemistry Questions

Aniline, when diazotized in cold and then treated with dimethyl aniline, gives a colored product. Its structure would be

The maximum number of molecules is present in

Number of chiral carbons in β–D–(+)– glucose is

In a reversible process, $ \Delta S_{\text{system}}+\Delta S_{\text{surrounding}}$ is

The number of sodium atoms in 2 moles of sodium ferrocyanide is

A compound formed by elements $X$ and $Y$ crystallizes in a cubic structure in which the $X$ atoms are at the corners of a cube and the $Y$ atoms are at the face-centers. The formula of the compound is :-

Which of the following forms cationic micelles above certain concentration?

If the value of $C_{p}$ for nitrogen gas is $j K ^{-1} mol ^{-1}$, then the value of $\Delta H$ on heating $28 \,g$ of nitrogen gas from $0^{\circ} C$ to $100^{\circ} C$ at constant pressure will be :

Which of the following is least reactive in a nucleophilic substitution reaction?

In a galvanic cell, the electrons flow from :

In a mixture of acetic acid and sodium acetate the ratio of concentrations of the salt to the acid is increased ten times. Then the pH of the solution :

A nitrogen containing organic compound gave an oily liquid on heating with bromine and potassium hydroxide solution. On shaking the product with acetic anhydride, an antipyretic drug was obtained. The reactions indicate that the starting compound is :

Benzoin is :

$CN^-$ is strong field ligand. This is due to the fact that

Which of the following coordination compounds would exhibit optical isomerism

CN– is a strong field ligand. This is due to the fact that

In an octahedral structure, the pair of d orbitals involved involved in d2 sp3 hybridization is

Which one of the following statements about the zeolites is false ?

2-phenyl propene on acidic hydration, gives

The rate of first order reaction is $1.5 \times 10^{-2}$ mol $L^{-1} \, min^{-1}$ at 0.5 M concentration of the reactant. The half-life of the reaction is

Camphor is often used in molecular mass determination because

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at 25ºC. The equilibrium constant of the reaction would be

The rapid change of $pH$ near the stoichiometric point of an acid base titration is the basis of indicator detection. $pH$ of the solution is related to ratio of the concentrations of the conjugate acid ($HIn$) and base $ (In^-) $ forms of the indicator given by the expression

The Ostwald dilution law is expressed as: