The separation technique based on the difference in boiling points of liquids is: MCQ with Answer and Explanation

The separation technique based on the difference in boiling points of liquids is:
A. Distillation
B. Filtration
C. Chromatography
D. Sublimation
Answer: Option A
Solution (By JKSSB Mock Tests)
Distillation separates a mixture of two or more miscible liquids with different boiling points. The liquid with the lower boiling point vaporizes first, is condensed, and collected separately. Fractional distillation is used when the boiling point difference is less than 25 K. Simple distillation works for larger differences. Filtration separates solids from liquids; sublimation separates sublimable solids; chromatography separates dissolved substances based on differential adsorption.

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Practice More chemistry Questions

Question #1
The process of heating an ore in the absence of air to remove volatile impurities is called:
A. Leaching
B. Smelting
C. Roasting
D. Calcination

Correct Answer: Option D


Explanation:
Calcination involves heating an ore in limited supply or absence of air, often to convert carbonates/hydroxides to oxides and remove moisture or volatile impurities. Example: CaCO₃ → CaO + CO₂; Al(OH)₃ → Al₂O₃ + 3H₂O. Roasting is heating in excess air, usually for sulfide ores. Smelting uses reducing agents to obtain metal. Leaching uses chemicals.

This question belongs to: Science chemistry
Question #2
Which of the following bonds is present in diamond?
A. Covalent network
B. Hydrogen bond
C. Metallic
D. Ionic

Correct Answer: Option A


Explanation:
Diamond has a three-dimensional network of strong covalent bonds between carbon atoms (sp³ hybridization). This giant covalent structure gives diamond its extreme hardness, high melting point, and electrical insulating property. Graphite also has covalent bonds within layers but conducts due to delocalized electrons. Ionic bonds are in NaCl, metallic bonds in metals, hydrogen bonds in water.

This question belongs to: Science chemistry
Question #3
Which radioactive emission has the highest ionizing power?
A. Alpha
B. Gamma
C. Beta
D. X-rays

Correct Answer: Option A


Explanation:
Alpha particles, being heavy and doubly charged, cause intense ionization over a short distance. They are least penetrating. Gamma has low ionization but high penetration.

This question belongs to: Science chemistry