In the leaching of alumina from bauxite, the concentration of the ore is achieved by:

When one mole of ${\rm{KMn}}{{\rm{O}}_4}$ reacts with $HCl$, the volume of chlorine liberated at $NTP$ will be:

Henry's law constant for CO$_2$ in water at 298K is 1.67 x 10$^8$ Pa. Calculate the mass of CO$_2$ dissolved in 500 mL of soda water when packed under 2.5 atm CO$_2$ pressure at 298K. (1 atm = 1.013 x 10$^5$ Pa, molar mass of CO$_2$ = 44 g/mol)

Reactants react in the equal number of …….. to give products.

Which of these is the correct formula for calculating molality?

When one mole of ${\rm{KMn}}{{\rm{O}}_4}$ reacts with $HCl$, the volume of chlorine liberated at $NTP$ will be:

If we dissolve 20g of NaOH in 200ml of water, what will be the mass percentage of NaOH in the solution (assuming the density of water is 1g/ml)?

Which of the following methods is NOT typically used for concentrating a dilute ore?

The process of removing gangue from ore is known as:

1 gram of potassium hydroxide was treated with $20 \mathrm{mL}$ of $0.5 \mathrm{M}$ HCl solution. The mass of potassium hydroxide left unreacted is equal to

An increase in temperature typically causes which of the following changes in a chemical reaction?