Exploring Mixtures and Their Separation Flashcards

Fill-in-the-blank flashcards covering mixtures, concentration formulas, solubility, separation methods, and colloids from Grade 9 Science Chapter 5.

Dilip Mahalanabis was an Indian paediatrician who first developed and implemented the treatment for dehydration caused by diseases such as __________ and cholera.

diarrhoea

The mathematical formula for Mass by mass percentage is Mass of solute divided by Mass of solution, multiplied by __________.

$$100$$

A hospital saline drip contains a $0.9\%\,\text{m/v}$ concentration of __________ in water.

sodium chloride

The process of forming pure solid particles arranged in a regular geometric pattern from a saturated solution is called __________.

crystallization

When preparing copper sulfate crystals, adding a drop of dilute __________ helps prevent unwanted reactions.

sulfuric acid

In ancient Indian salt production, panga salt was obtained by boiling sea brines, while __________ salt was produced by evaporating sea water.

karkatch

Distillation is suitable for separating miscible liquids that have a minimum boiling point difference of __________ $^\circ\text{C}$.

$$25$$

The traditional perfume-making technique used in Kannauj to produce Mitti ka Ittar is known as the __________ method.

Deg-Bhapka

Fractional distillation is used to separate components of a mixture with boiling point differences less than __________ $^\circ\text{C}$.

$$25$$

The term chromatography is derived from the Greek words chroma, meaning "colour", and graphein, meaning "__________".

to write

The transition of a solid directly into a vapour state without passing through the liquid state is called __________.

sublimation

The process in which vapours cool and change directly back into a solid without becoming a liquid is called __________.

deposition

Brass is an alloy made of approximately $80\%$ copper and $20\%$ __________.

zinc

Bronze is an alloy consisting of approximately $80\%$ copper and $20\%$ __________.

tin

A low-cost, hand-powered device called a __________ uses rotational motion to centrifuge blood samples without electricity.

paperfuge

Adding powdered alum to muddy water causes fine suspended particles to clump together through a process called __________.

coagulation

The particle size in a suspension is greater than __________ $\text{nm}$ in diameter.

$$1000$$

The scattering of light by particles in a colloid or suspension is known as the __________ effect.

Tyndall

Colloids where both the dispersed phase and the dispersion medium are liquids are referred to as __________.

emulsions

In the separation of acetone and water by distillation, acetone boils at about $56\,^\circ\text{C}$ and water boils at __________ $^\circ\text{C}$.

$$100$$