Chemistry TAMN Question Solved Graded A+.

Catalyst (enzyme) -correct answer A substance that increases the rate of a chemical reaction without being changed itself, lowers the activation energy needed for a reaction Electrolyte -correct answer A substance that is dissolved in solution and some of its molecules split or dissociate into electrically charged atoms or ions Oxidant -correct answer Causes a GAIN of electrons and is REDUCED in a chemical reaction Reductant -correct answer Causes a LOSS of electrons and is OXIDIZED in a chemical reaction To be REDUCED -correct answer To GAIN electrons To be OXIDIZED -correct answer To LOSE electrons Indicator -correct answer Substance that undergoes a distinct observable change when conditions in its solution change IA -correct answer Alkali Metals (+1 charge) IIA -correct answer alkaline earth metals (+2 charge) IIIA -correct answer Boron Group, semi metal and basic metals (+3 charge) IVA -correct answer Non metal, semi metal, basic metal (+/-4) VA -correct answer Non metal, semi metal, basic metal (+3) VIA -correct answer Chalcogens (-2) VIIA -correct answer Halogens -1 VIIIA -correct answer noble gases (inert gases) Ra -correct answer Lowest ionization potential Ca -correct answer Bigger than Mg Be, Mg, Ca, Sr, Ba, Ra -correct answer Group 2A: Alkaline Earth Metals NOT TRUE: Be is most active metal among them They have relative low electronegativities unsaturated solution -correct answer Solute concentration is lower than its equilibrium solubility saturated solution -correct answer Point of maximum concentration No more solute may be dissloved supersaturated solution -correct answer No more of the substance can be absorbed by the liquid Diluted solution -correct answer Containing relatively small amount of solute as compared with solvent Volume inside a balloon -correct answer PV=nRT Figure out volume for each given temperature then subtract them Normality -correct answer Molarity x total positive oxidation number HC2H3O2 = 8 N Molarity -correct answer Normality ÷ total positive oxidation number 6N H3PO4 = 6/3 = 2M Ionic bonding -correct answer For compound with greatest electronegative difference Fats -correct answer Source of E in times of prolonged hunger and insulate body against loss of heat Molarity -correct answer moles of solute/liters of solution Normality -correct answer Number of gram equivalent weights of solute ÷ liter of solution Molality -correct answer moles of solute/kg of solvent mole fraction -correct answer Number of moles of compound ÷ total moles in system Percent composition by mass -correct answer mass of solute/mass of solution x 100% covalent bond -correct answer Strongest bond Sharing of electron pairs ionic bond -correct answer 2nd strongest bond Electrostatic attraction between two oppositely charged ions metallic bonding -correct answer 3rd strongest bond Metals only hydrogen bonding -correct answer 4th in bonding hierarchy Bond with N, O, F dipole-dipole -correct answer 5th in bonding hierarchy Exists because of interaction of dipoles on pooar molecules in close contact London dispersion -correct answer weakest intermolecular force Dipole- dipole moments Lower density than water -correct answer Floats in water metal oxide + water -correct answer Basic (CaO, BaO, MgO) non-metal oxide + water -correct answer Acidic (CO2) 1 cal/g*degCel = 4.186 J/g*degCel -correct answer Specific heat of water r1/r2 = sqrt(M2/M1) -correct answer Grahams law Compounds -correct answer Made up of molecules of at least 2 different elements Neutralization -correct answer Combination of equivalent amounts of acids and bases Precipitation -correct answer Condensation of atmospheric water vapour that falls under gravity Hydrolysis -correct answer the cleavage of chemical