List of top Chemistry Questions

The wavelength of a spectral line for an electronic transition is inversely related to
A bottle of dry ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends the white ammonium chloride ring first formed will be
The molecule that has linear structure is
When mercuric iodide is added to the aqueous solution of potassium iodide
The IUPAC name of the compound $CH_2=CH-CH(CH_3)_2 $ is
Which of the following oxides of nitrogen is a coloured gas ?
Bromine can be liberated from potassium bromide solution by the action of
If two compounds have the same empirical formula but different molecular formulae, they must have
Fluorine does not show positive oxidation states due to the absence of
Atomic radii of fluorine and neon in Angstrom units are respectively given by
The brown ring complex compound is formulated as $[Fe (H_2 O)_5 (NO)^+] SO_4.$ The oxidation state of iron is
Hydrogen bonding is maximum in
A solution of sodium sulphate in water is electrolysed using inert electrodes. The products at cathode and anode are respectively
Amongst the trihalides of nitrogen, which one is least basic?
The half-life period of a radioactive element is 140 days. After 650 days, one gram of the element will reduce to
A molal solution is one that contains one mole of solute in
A molal solution is one that contains one mole of a solute in
Which one amongst the following pairs of ions cannot be separated by $H_2 S$ in dilute HCl ?
When $ NaNO_3$ is heated in a closed vessel, oxygen is liberated and $ NaNO_2$ is left behind At equilibrium,
$CO_2$ is isostructural with
The hybridisation of sulphur in sulphur dioxide is
The reaction condition leading to the best yield of C$_2H_5 Cl$ are-
The compound insoluble in acetic acid is
If a gas is expanded at constant temperature
The bonds present in $N_2O_5$ are