List of top Chemistry Questions

Sulphuric acid reacts with $PCl_5$ to give

Sulphide ores are generally concentrated by

Sulpha drugs are used for

Sulphide ion $(S^{2-})$ reacts with solid sulphur forming $S^{2-}_2$ and $S^{2-}_3$ with formation constants 12 and 132 respectively. Formation constant of $S^{2-}_3$ from sulphur and $S^{2-}_2$ is :

Substances whose solutions can readily diffuse through parchment membrane are

Structure of boric acid is

Stephen's reduction is used to prepare aldehyde from :

Stephen's reduction converts nitriles into

Statement-1 : BO is acidic. Statement-2 : AlO and GaO are Amphoteric. Statement-3 : In O and T$\ell_2$O are basic in nature. No. of correct statements are -

Statement 1. A gas at high temperature and low pressure behaves as an ideal gas.$\,$ Statement 2, A gas in which intermolecular forces are zero is called ideal gas

State of hybridisation of carbon atom of carbene in the singlet state is

Spraying of DDT produces pollution of

Specify the coordination geometry around and hybridisation of N and B atoms in a 1 : 1 complex of $BF_3$ and $NH_3$.

Species acting both Bronsted acid and base is

$sp^3$ has s-character

Some medicines are more effective in the colloidal form because of

Solubility of iodine in water may be increased by adding

Solubility curve of $Na_2SO_4?10H_2O$ in water with temperature is given as shown in the figure. From the figure, we can say that

Solid NaCl is a bad conductor of electricity because

Solid $ {CO2}$ is known as dry ice:

Solid $X$ is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?

Solid $CH_4$ is

Sodium when dropped in water catches fire because

Sodium thiosulphate $(Na_2S_2O_3.5H_2O)$ is used in photography to

Soft drinks and baby feeding bottles are generally made up of