Alum helps in purifying water by

Important Questions on Surface Chemistry

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 74

Figure out which of the following is not an application of adsorption?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 75

The charge on colloidal particles is due to

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 76

Which of the following cannot coagulate $\mathrm{Al}(\mathrm{OH}{)}_3$ sol?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 77

Which of the following processes will not coagulate a lyophobic colloid?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 78

Different gold sols have different colours like red, blue, purple, golden etc. This is mainly because of

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 79

At CMC, the surfactant molecules

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 1>Q 80

The critical micelle concentration (CMC) is

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 26 - Surface Chemistry>Level 2>Q 1

The pressure of the gas was found to decrease from $720$ to $480 \mathrm{mm}$ of Hg. When $5 \mathrm{g}$ of the sample of activated charcoal was kept in a flask of one litre capacity maintained at $27°\mathrm{C}$. If the density of charcoal was at $1.25\mathrm{g}/$$\mathrm{mL}$. The volume of gas adsorbed per $\mathrm{gm}$ of charcoal at $480 \mathrm{mm}$ of $\mathrm{Hg}$ is: