Chemistry Reviewer PDF

CHEM REVIEWER **MOLECULAR**-MATERIALS THAT ARE SOFT AND HAS A LOW MELTING POINT HAVE A CRYSTAL THAT ARE: ARRANGE THE FOLLOWING FROM HIGHEST TO LOWEST BOILING POINT : CH4 H2O C2H6 AND C3H8 **H20,C3H8,C2H6,CH4** DUCTILITY **-- STRETCHES WITHOUT BREAKING** BRITTLENESS**- EASILY BREAKS** ELASTICIT...

CHEM REVIEWER **MOLECULAR**-MATERIALS THAT ARE SOFT AND HAS A LOW MELTING POINT HAVE A CRYSTAL THAT ARE: ARRANGE THE FOLLOWING FROM HIGHEST TO LOWEST BOILING POINT : CH4 H2O C2H6 AND C3H8 **H20,C3H8,C2H6,CH4** DUCTILITY **-- STRETCHES WITHOUT BREAKING** BRITTLENESS**- EASILY BREAKS** ELASTICITY **-- CAN BE STRETCHED AND RETURNS TO ORIGINAL FORM** MALLEABILITY- **WILL SPREAD INTO SHEETS WHEN HAMMERED** THERMAL EXPANSION -- **INCREASE IN LENGTH AREA OR VOLUME WHEN HEATED** 8\. Refractories, like bricks, can withstand high heat. **TRUE** 9\. Ionic crystals have the capacity to conduct electricity even in their solid form. **FALSE** 10\. Glasses are amorphous solids. **TRUE** 11\. Metals have delocalized electrons in its crystal lattice that made them good insulators. **FALSE** 12\. Materials that are large in volume always have greater density compared to materials of the same mass but with small volume. **FALSE** 13\. Ceramics combined with metals are called composites. **TRUE** 14\. The arrangement of atoms in a material has nothing to do with the properties of materials. FALSE 15\. Fast cooled materials produce crystalline solids. **FALSE** **ALLOYS AND POLYMERS** POLYMERS IS AN ADDITION WEHRE MONOMERS ARE LINKED TOGETHER BY COVALENT BONG PRODUCING**. POLYMERS** THE ELEMENT OF POLYMERS ARE: **CARBOR & HYDROGEN** GIVEN ARE STATEMENTS ABOUT POLYMERS. WHICH OF THE FOLLOWING IS/ARE TRUE ABOUT THE POLYMERS? **ONE OF THE RAW MATERIALS IN POLYMERS IS PETROLIUM & POLYMERS IS MACROMOLECULES** COPPER AND TIN - **BRONZE** MERCURY AND SILVER -- **AMALGAN** IRON AND CARBON - **STELL** LEAD AND TIN -- **SOLDER** MINERAL WATER BOTTLE - **PET** CUSHION FOR APPLIANCES DURING TRANSPORT -**PS** SHAMPOO BOTTLES -- **PS AND PVC** PIPES -- **PET AND PVC** POLYMERS THAT HAVEAROMATIC HYDROCARBONS ARE: **PET AND PS** WHICH OF THE FOLLLOWING IS/ARE TRUE ABOUT POLYMERIZATION ? **IT IS ADDITION PROCESS, IT CREATS LONG CHAIN OF MONOMER AND PRODUCTS CONTAIN ALL THE STARTING MATERIALS** WHICH OF THE FOLLOWING IS/ARE NOT TRUE ABOUT POLYMERS ? **POLYMERS ARE ALWAYS HARD AND TRANSPARENT AND POLYMERS ARE ALWAYS CRYSTALINE** 15\. Polymers have lower melting point than metals because their atoms are held by ionic bond. **FALSE** 16\. The number inside the recycling logo in polymers tells how many times a polymer can be used. **FALSE** 17\. The atoms of polymers are held by covalent bonds. **TRUE** 18\. Alloys have the different characteristics and functions as their original metals. **TRUE** 19\. Because of combination of different metals to make an alloys, there are alloys that would not conduct electricity. **FALSE** 20\. Corrosion of metals is an oxidation process, meaning oxygen is a reactant. **TRUE** **PVC-POLIVINYL CHLORIDE** **PS- POLYSTYRENE** **PET- POLYETHYLENE TEREPHTHALATE** **PP- POLYPROPYLNE** **HDPE- HIGH DENSITY POLYETHYLENE** BEST FOR ALLOYING GOLD AND JEWELRY - **COPPER** BEST FOR HUMAN IMPLANTS --**TITANIUM** BEST FOR PROJECTS THAT WILL FLY -- **DUVALUMIN** IRON, CARBON AND CHRONIUM -- **STAINLESS TILL** 96% Sn- **PEWTER**