Practice Pakistan's most useful MCQs for competitive exams

Direct conversion of solids into vapours is called ___________________?

• (A)  Solvent extraction
• (B)  sublimation
• (C)  crystallization
• (D)  vaporization

Answer

Submitted By :Ali Uppal

In CCI4 I2 shows________________?

• (A)  Red colour
• (B)  Purple colour
• (C)  Blue colour
• (D)  Yellow colour

Answer

Submitted By :Ali Uppal

Crystallization does not involve_______________?

• (A)  heating
• (B)  sublimation
• (C)  cooling
• (D)  vaporization

Answer

Submitted By :Ali Uppal

The major steps involved in complete quantitative analysis are _________________?

• (A)  2
• (B)  3
• (C)  4
• (D)  5

Answer

Submitted By :Ali Uppal

Which is not related pair of term used in analytical techniques________________?

• (A)  Filtrate residue
• (B)  Sublimate sublimation
• (C)  Drying desiccator
• (D)  Separating funnel mother liquor

Answer

Submitted By :Ali Uppal

Sintered glass is a porous material used for ___________________?

• (A)  absorption
• (B)  adsorption
• (C)  filtration
• (D)  sublimation

Answer

Submitted By :Ali Uppal

The solvent or mixture of solvents used for separation of compounds is called____________________?

• (A)  Stationary phase
• (B)  Mobile phase
• (C)  Dynamic phase
• (D)  Static phase

Answer

Submitted By :Ali Uppal

Silica gel and alumina are used as __________________?

• (A)  Mobile phase
• (B)  Stationary phase
• (C)  Mixed phase
• (D)  Single phase

Answer

Submitted By :Ali Uppal

Safe and the most reliable method of drying crystals is through_________________?

• (A)  Filter paper
• (B)  Vacuum desiccators
• (C)  Oven
• (D)  None of these

Answer

Submitted By :Ali Uppal

A process controlled by Distributive law is__________________?

• (A)  Crystallization
• (B)  Sublimation
• (C)  Solvent extraction
• (D)  Filtration

Answer

Submitted By :Ali Uppal