List of top Chemistry Questions

Sulphur reacts with chlorine in 1:2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridisation state of central atom in the anion of F?
An element has 2 electrons in its K-shell, 8 electrons in L-shell, 13 electrons in M-shell and one electron in N-shell. The element is:
Lattice energy of alkali metal chlorides follows the order :
The formula of exhausted permutait is:
What is the formula of calgon?
The nucleic acid base having two possible binding sites is
The metal which does not form ammonium nitrate by reaction with dilute nitric acid is :
The first excited state of hydrogen atom is 10.2 eV above its ground state. The temperature needed to excite hydrogen atoms to first excited level, is :
The energy of electron in the nth orbit of hydrogen atom is expressed as $ \sqrt{3}cm $ . The shortest and longest wavelength of Lyman series will be :
H2O is dipolar, whereas BeF2 is not. It is because
Among the following, the pair in which the two species are not isostructural is
Which one of the following can be oxidised to the corresponding carbonyl compound
Ionic radii are
The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl, using
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
Which of the following does not have a metal-carbon bond
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 one of the following is a chain growth polymer
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?