Mixtures are either homogeneous or heterogeneous. Homogeneous mixtures have a uniform composition. Heterogeneous mixtures have components which are different from one another. All of these mixtures are heterogeneous EXCEPT

• A. Bagoong isda (ginamos)

• B. Muddy water

• C. Newly-milled rice

• D. Salt solution

Based on the properties of the components of a sodium chloride solution, which separating method is most applicable?

• A. Chromatography

• B. Decantation

• C. Distillation

• D. Filtration

Which of the following represents a pure compound?

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• A. Baking soda

• B. Dry ice

• C. Ozone

• D. Yeast

What is the basis for separating mixtures through chromatography?

• A.     The substances’ ability to form gas

• B. A.     The substances’ abilities to pass through fine pores

• C. A.     The substances’ abilities to be attracted to magnets

• D. A.     The substances’ different abilities to adhere to the surface of solids

Which of the following is the correct sequence of steps to separate a mixture of salt and sand?

I.  Filter the sand with a filter paper. Set aside.

II.  Add water to the salt and sand mixture to dissolve the salt.

III. Pure water is condensed and collected in the receiving flask.

IV. In the distillation apparatus, boil the remaining salt solution to vaporize the water.

V.  After water has been boiled away, pure salt remains.

• A. II, I, III, IV, V

• B. II, III, IV, V, I

• C. II, V, III, I, IV

• C. II, I, IV, III, V

Which of the following is correctly matched?

• A. Protium

• B. Deuterium

• C. Tritium

• D. All of the above

Based on the following molecular model, which of the following is shown?

The structural formula for ethane is given by then following figure. What is the empirical formula of ethane?

What is the chemical name of KCl?

• A. Potassium chlorine

• B. Potassium chloride

• C. Potassium monochloride

• D. Potassium chloroform