Download App

Surface Chemistry — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12ChemistrySurface Chemistry5 Marks
Question
What is deeniulsification? Explain about the various techniques of deemulsification.
✓

Answer

Emulsion can be separated into two separate layers. This process is called Deemulsification. Various deemulsilication techniques are given below.
  1. Distilling of one component
  2. Adding an electrolyte to destroy the charge.
  3. Destroying the emulsifier using chemical methods.
  4. Using solvent extraction to remove one component.
  5. By freezing one of the components.
  6. By applying centrifugal force.
  7. Adding dehydrating agents for water in oil type.
  8. Using ultrasonic waves.
  9. Heating at high pressures.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[ 5 Marks Questions ]" from Surface Chemistry→Surface Chemistry — all question types→Chemistry STD 12 question papers→Tamilnadu Board STD 12 question papers→Tamilnadu Board question paper generator→

Similar questions

Explain free radical polymerisation with example.
→
Explain about SHE (Standard Hydrogen Electrode).
→
 An organic compound $(A)$ of molecular formula $C _7 H _8 O$ on oxidation with alkaline $KMnO _4$ gives $(B)$ of formula $C _7 H _6 O$. (B) on reaction with $Cl _2$ in the presence of catalyst $FeCl _3$ gives (C) of formula $C _7 HOCl$. (B) on reaction with $Cl _2$ in the absence of catalyst gives $C _7 H _5 OCl$. Identify $A , B , C , D$ and explain the reaction involved.
→
Give reasons for each of the following :
  1. Bleaching of flowers by $Cl_2$ is permanent while by $SO_2$ is temporary.
  2. Molten aluminium bromide is a poor conductor of electricity.
  3. Nitric oxide becomes brown when released in air.
  4. $PCl_5$ is ionic in nature in the solid-state.
  5. Ammonia is a good complexing agent.
→
How would you calculate the order of the reaction $2 NO + O _{2( g )} \rightarrow 2 NO _{2( g )}$ by an experiment?
(or)
prove that $2 NO + O _2 \rightarrow 2 NO _2$ is a third order reaction.
→
1. State two advantages of $H _2- O _2$ fuel cell over ordinary cell.
2. Silver is electron deposited on a metallic vessel of total surface area $900 cm^2$ by passing a current of 0.5 amp for two hours. Calculate the thickness of silver metal deposited. [Given: Density of silver $=10.5 g cm ^{-3}$ Atomic mass of silver $=108 u . IF =96500 C mol ^{-1} ]$.
→
It has been found that the pH of a $0.01\ M$ solution of an organic acid Is $4.15.$ Calculate the concentration of the anion, the lonization constant of the acid and its $pK _{ a }$.
→
Explain the principle of electrolytic refining with an example.
→
Starting from phenol, how would you prepare the following compounds.
  1. Benzene
  2. Aniline
  3. Anisole
  4. 1, 4, benzoqulnone
  5. Cyclohexanol
→
An organic compound (A) of molecular formula $C _2 H _6 O$ on reaction with acidified $K _2 Cr _2 O _7$ gives (B) of molecular formula $C _2 H _4 O$ which on further oxidation gives (C) of molecular formula $C _2 H _4 O _2$. Compound $\left( C\right.$ ) reacts with (A) in the presence of conc. $H _2 SO _4$ gives (D) of molecular formula $C _4 H _8 O _2$. Identify $A, B, C, D$ and explain the reaction Involved.
→