Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper.

1. What is formed when two or more substances are combined?

A.Pure Substance
B.Mixture
C.Matter
D.Solid matter

2.What mixture has a uniform composition and exist in single form?

A.Homogeneous Mixture
B.Heterogeneous Mixture
C.Matter
D.Pure Substance

3.What mixture has NO uniform composition
and exist in two or more phases?

A.Matter
B.Puresubstance
C.Homogeneous Mixture
D.Heterogeneous Mixture

4.Which is NOT a heterogeneous mixture?

A.Cement
B.Salad
C.Halo-Halo
D.Air

5.What does NOT belong the group?

A.Air
B.Mango Juice
C.Dishwashing
D.Fried Rice

6.Which of the following is NOT soluble in water?

A.Haphthalene
B.Salt
C.Sugar
D.Vinegar

7.Which of the following liquids do not mix with water?

A.Liquid soap
B.Oil
C.Soy sauce
D.Vinegar

8.In solutions,the additive is called the___, while the subtance that dissolves the first is called the ___.

A.Solute:solvent
B.Solvent:solute
C.Seasoning:water
D.solubility:concentration

9.Solubility is measured in terms of ___.

A.how much solute is dissolved in the solvent
B.how much solvent in dissolved in the solute
C.how much solute can be dissolved in a fixed amount of solvent
D.how much solvent can be dissolved in a fixed amount of solute

10.Which of the following salt soltions is the most concentrated?

A.20 grams of salt dissolved in 100 mL of water
B.30 grams of salt dissolved in 100 mL of water
C.40 grams of salt dissolved in 200 mL of water
D.50 grams of salt dissolved in 200 mL of water

11.How much alcohol is 250 mL of 40% solution?

A.25 mL
B.40 mL
C.100 mL
D.150 mL

12.if you make kalamansi juice with sugar and water, which is the solvent?

A.Kalamansi juice
B.Water
C.Sugar and juice
D.Sugar

13.What is the use of chlorine bleach?

A.Remove stain
B.Disinfects surfaces
C.Whitens clothes
D.All of the above

14.Disinfects is used to cure or prevent diseases?

A.Medicine
B.Fungi
C.Surfactant
D.Detergent

15.Which of these common household materials is the most flammable and should not be kept inside the house?

A.Soap
B.Paint
C.Lotion
D.Toothpaste

16.What is the distinction between a suspension and a solution? A suspansion is ___

A.More concentrated that a solution
B.Less concentrated than a solution
C.Heterogeneous while a solution homogeneous
D.Homogeneous while a solution is heterogeneous

17.Why should medicines prepared as suspension be shaken well before use?

A.to mix in the powder drug that may have setted at the bottom
B.to make sure the flavors are mixed in so the
dose will not taste bitter
C.to make the suspention turn into a colloid first before getting a dose
D.to make the suspension turn into a solution first before getting a dose

18.What ia the differrence between a suspention and a colloid? Suspensions___

A.are for medicines while colloid are for food.
B.are heterogeneous while colloid are homogeneous.
C.lose their consistency while colloids remain consistent.
D.to make either be solids, liquids, or gases,whilecolloids are all liquids.

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