JEE Main · 2023 · 15 Apr 2023 · Shift 1 · Surface Chemistry

The adsorbent used in adsorption chromatography is/are
A. silica gel
B. alumina
C. quick lime
D. magnesia

Choose the most appropriate answer from the options given below :

Identity the incorrect pair from the following:

For the adsorption of hydrogen on platinum, the activation energy is $30\mathrm{kJ}{\mathrm{mol}}^{-1}$ and for the adsorption of hydrogen on nickel, the activation energy is $41.4\mathrm{kJ}{\mathrm{mol}}^{-1}$. The logarithm of the ratio of the rates of chemisorption on equ …

The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ____

Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather.

Coagulating value of electrolytes ${\mathrm{AlCl}}_3$ and NaCl for ${\mathrm{As}}_2{\mathrm{S}}_3$ are 0.09 and 50.04 respectively. The coagulating power of ${\mathrm{AlCl}}_3$ is $x$ times the coagulating power of NaCl . The value of $x$ is
____ :

Ferric chloride is applied to stop bleeding because: