Laboratory Technique | MCQs

Explanation

In qualitative analysis, a sample can be a solid, liquid, gas, or a mixture.

A mixture is a physical combination of two or more substances, where each substance retains its chemical properties.

Explanation

• Litmus paper is a simple and effective way to test whether a substance is an acid or a base.
• It turns red in acidic solutions and blue in basic solutions.

Explanation

• Filtration is the process of separating an insoluble solid from a liquid by passing the mixture through a filter paper or a porous material.
• The solid particles are retained by the filter.
• While the liquid passes through, resulting in a clear separation of the two.