Question # 1

During paper chromatography, the stationary phase is.

Choose an answer

Solid

Liquid

Gas

Plasma

Solvent extraction method is particularly useful technique for separation when the product to be speared is.

Choose an answer

Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

The comparative rates at which the solutes move in paper chromatography depends on.

Choose an answer

The size of paper used

Their Rt values solutes

Temp of the experiment

Size the chromate grapic tank

Repeated extraction using small portions of solvent are more.

Choose an answer

Accurate

efficient

Slow

Rapid

Which one of the following substances is used as decolouring agent

Choose an answer

Animal charcol

Concentrated H₂SO₄

CaCI₂

Silica gel

One of the following substances is not used as a drying reagent in a desiccator

Choose an answer

Cons. H₂SO₄

P₂O₅

Silica gel

50% KOH

Solvent extraction is an equilibrium process and it is controlled by.

Choose an answer

Law of mass action

The amount of solvent used

Distribution law

The amount of solute

When hot saturated solution is cooled very rapidly, we get

Choose an answer

Medium sized crystals

large sized crystals

Premature crystallization of the substance

Old crops of crystals

The crystallization of a solid substance is done from a hot saturated solution. The solution is

Choose an answer

Evaporated rapidly

Cooled very slowly to get good crystals

Cooled rapidly to get excellent crystals

Mixed with another miscible solvent

NaCI and sand can be separated by one of the following without filtration

Choose an answer

Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

Which one is not example of a sublimate.

Choose an answer

NH4Cl

I

NaCl

Benzoic Acid

The drying agent used in a desiccator.

Choose an answer

Agcl

NH4Cl

P2O5

AlCl3

Safe and reliable method of drying crystals is through.

Choose an answer

Pressing it between folds of filter paper

Drying it in oven

Evaporation of solution

Vacuum desiccator

The drying agents used in desiccator is.

Choose an answer

BeCl2

MgCl2

CaCl2

SrCl2

Chromatography is the process which involve the distribution of a solute between

Choose an answer

Two mobile phases

A stationary phase and mobile phase

Two stationary and two mobile phases

Two stationary phases

In order to have good crystals of a substance the temperature of the system at the time of preparation of solution should be

Choose an answer

Around 0°C

Around room temperature

Sufficiently more than room temperature

Just above the room temperature

Which of the following precautions in necessary for smooth filtration

Choose an answer

The filter paper should be of big size

The tip of funnel should not touch the side of the beaker

The stem of the funnel should be very small

The stem of he funnel should remain continuously full of liquid

The comparative rates at which the solutes move in paper chromatography, depends on

Choose an answer

The size of paper used

Their R_fvalues

Their partition coefficients

The polarity of solvent used

More Classes

Other Links

Chemistry Fsc Part 1 Chapter 2 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer