List of practice Questions

Heavy water is used as moderator in a nuclear reactor. The function of the moderator
Height at which the value of $g$ becomes $1/4th$ to that on earth is
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
Heat is absorbed by a body but its temperature does not rise. Which of the following statements explains the phenomena?
Heating a mixture of sodium benzoate and soda lime gives
Heating an aqueous solution of aluminium chloride to dryness will give
Hb value for a healthy adult male is
HCl is a gas but HF is a low boiling liquid. This is because
he apparent depth of a needle lying at the bottom of the tank, which is filled with water of refractive index $1.33$ to a height of $12.5 \,cm$ is measured by a microscope to be $9.4\, cm$. If water is replaced by a liquid of refractive index $1.63$ upto the same height. What distance would the microscope have to be moved to focus on the needle again?
Heart sound which is longer is
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
Haustra are found in
Haloforms are trihalogen derivatives of
Halogen family forms one of the most homogeneous group of the periodic table because
Half of the lens is wrapped in black paper. How will it change the image?
$ {H_2S}$ is passed through an acidified solution of copper sulphate and a black precipitate of cupric sulphide is formed. This is due to
$H_3PO_3$, phosphorus acid is
H-O-H bond angle in H$_2O$ is 104.5$^{\circ}$ and not 109$^{\circ}$ 28' because of
Hairy leaves of many plants are associated with
Gyromagnetic ratio is the ratio of magnetic moment $(\mu_{1})$ to the orbital angular momentum $(l)$ Its numerical value for an electron is given by
$H_2S$ is more acidic than $H_2O$ because
Gypsum is added to portland cement to