CHEMISTRY 4th Q reviewer - Science Examination

Exam

1. CHEMISTRY 4 TH QUARTERLY ASSESSMENT REVIEW

2. POINTERS Gas Laws Kinetic Molecular Theory Acids and Bases Metals and Nonmetals

3. TYPE OF TEST (40 ITEMS) I. MULTIPLE CHOICE INVESTIGATION CER CREATING

4. KMT WHAT CAUSES GAS PRESSURE?

5. KMT Collision IS PERFECTLY ELASTIC. Forces between molecules are weak. Molecules are in constant random motion.

6. GAS LAWS Complete the statement: As the volume of the confined gas increases at a constant temperature, the pressure of the gas_______________________.

7. Boyle’s Law The inverse relationship between pressure and volume at constant temperature

8. Think! What will happen to a balloon if you fill it with cooler air and then place it under the hot sun for an hour?

9. Answer! It will decrease the pressure and increase the volume of the balloon.

10. Answer! Pressure will build up and deflate it.

11. Think! What will happen to a balloon if you fill it with warm air and set it in the freezer for an hour?

12. METALS & NONMETALS

13. Why are gold and silver useful in making jewelry?

14. Why copper is good for creating wire? What property of metal is shown or illustrated?

15. Ductility is a physical property of a material that describes its ability to be stretched, pulled, or drawn into a thin wire or thread without breaking. It is the measure of how much a material can be deformed or elongated under stress before it fractures. What property of metal is shown or illustrated?

16. Which material is being described by the learner: Poor conductors of heat. They do not luster and are not malleable and ductile.

17. Which material is being described by the learner: Poor conductors of heat. They do not luster and are not malleable and ductile. Nonmetal

18. Why is aluminum a good element to use for making cooking pans?

19. Why is aluminum a good element to use for making cooking pans? GOOD CONDUCTOR OF HEAT

20. BRIDGES ARE MADE FROM IRON. BECAUSE IT IS STRONG AND MALLEABLE. Complete the sentence: The melting point is the temperature at which a substance changes from a __________ state to ______.

21. BRIDGES ARE MADE FROM IRON. BECAUSE IT IS STRONG AND MALLEABLE. Complete the sentence: The melting point is the temperature at which a substance changes from a solid state to liquid .

22. Give an inference on the different materials.

23. ACIDS & BASES

24. ____ tap water(green) ____vinegar (blue) COLOR NATURE OF THE SAMPLE Red to pale red Strongly acidic Blue Weekly acidic Yellow Strongly basic Green Weakly basic

25. ____Unpolluted water(pH5.6) ____ gastric juice (pH 1.6)

26. SOLUTION & CONCENTRATION SOLUBILITY IN 100 GRAM OF H2O (WATER) 20 OC (DEGREES CELSIUS) 50 (DEGREES CELSIUS) 100 DEGREES CELSIUS) 15 g 20 g 25 g Using a solubility test of 100 mL water, at a temperature of 100 degrees C elsius. Lana a grade 9 learner tried to dissolve a 40 grams of granulated salt. What is the excess amount of undissolved salt?

27. You are asked to make a 70% ethyl alcohol solution, with a total volume of 500 mL. You will be provided with 95.5 % ethanol. What will be the volume of 95.5 % ethanol, and the volume of the distilled water in a 500 mL solution?