List of top Chemistry Questions

HF is not stored in glass bottles because

HI can be prepared by all the following methods, except

Hexafluorocobaltate (III) ion is a high spin complex. The hybrid state of cobalt is

Hess's law states,

Helium-oxygen mixture is used by deep sea diversin preference to nitrogen-oxygen mixture because

Heating of ore in presence of air to remove sulphur impurity is called

Heating pyrites air to remove sulphur dioxide is known as

Heating an aqueous solution of aluminium chloride to dryness will give

Heating a mixture of sodium benzoate and soda lime gives

HCl is a gas but HF is a low boiling liquid. This is because

Halogens are all coloured because

Hardy-Schulze rule explains the effect of electrolytes on the coagulation of colloidal solution. According to this rule, coagulation power of cations follow the order

Haloforms are trihalogen derivatives of

Halogen family forms one of the most homogeneous group of the periodic table because

$H_3PO_3$, phosphorus acid is

$ {H_2S}$ is passed through an acidified solution of copper sulphate and a black precipitate of cupric sulphide is formed. This is due to

H-O-H bond angle in H$_2O$ is 104.5$^{\circ}$ and not 109$^{\circ}$ 28' because of

$H_2S$ is more acidic than $H_2O$ because

Gypsum is added to portland cement to

Group $16$ elements have lower value of first ionisation enthalpy as compared to group $15$ elements because

Group oxidation state of p-block elements is

Gravity separation process may be used for the concentration of

Gravity separation method is based upon

Graphite is black in colour. This is because

Graphs between pressure and volume are plotted at different temperatures. Which of the following isotherms represents Boyle?? law as $PV $= constant? $\left(T_{1} >T_{2} >T_{3}\right)$

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