Stoichiometry MCQs

Atoms combine together in fixed ratios that will give them full outer shells of electrons. True  False Which of the following ways used to show how the atoms in a particular molecule are bonded? Molecular formula Structural formula Empirical formula Which of the following ways used to show simplest whole-number ratio of atoms in a compound? Molecular formula Structural formula Empirical formula Which of the following ways used to show the actual number of atoms of each element in one molecule of the compound or element? Molecular formula Structural formula Empirical formula Hydrogen gas is consisting of two hydrogen atom. Which of the following formula give only this piece of information? Molecular formula Structural formula Empirical formula Group VI can form …. single bonds or … double bonds 2,1 1,2 6,3 4,2 Group IV can form …. single bonds or … double bonds 2,1 1,2 6,3 4,2   What is the formula of aluminium sulfide? Al2S (NH4)2SO4 Al3S2 Al2S3 What is the formula of ammonium sulfate? NH4SO4 (NH4)2SO4 NH4(SO4)2 (NH4)2S   Reaction conditions or the name of a catalyst can be written with reactants. True  False Is the following reaction balanced? NaOH + H2SO4 → Na2SO4 + H2O Yes No  Which of the following reaction is correctly balanced equation? Al     +     CuO     →     Al2O3     +     Cu 2Al     +     CuO     →     Al2O3     +     Cu 2Al     +     3CuO     →     Al2O3     +     3Cu Al     +     3CuO     →     Al2O3     +     3Cu Fe + Cl2 → FeCl3, what coefficients would balance the equation?  2,3,2 3,2,3 3,3,2 2,2,3 Relative Atomic mass is calculated by  Ar = % of isotope a×mass of isotope a+…100 Ar = % of isotope a×mass of isotope a100 Ar = % of isotope a×mass of isotope a+ % of isotope a×mass of isotope b+…100   The symbol for the relative molecular mass is Mr and it refers to the total mass of the molecule.  True False For a molecule of ammonium nitrate, It’s mass is…. g/mol 48 80 36 112 For a molecule of Magnesium Nitrate, It’s mass is…. g/mol 48 80 182 148 In the following reaction   2KI(aq)    +    Cl2(aq)    → 2KCl(aq)   +    I2(aq) K+ is the spectator ion and net ionic eq. is 2I-(aq)  + Cl2(aq)  → 2Cl-(aq)   +    I2(aq) I- is the spectator ion and net ionic eq. is 2I-(aq)  + Cl2(aq)  → 2Cl-(aq)   +    I2(aq) Cl- is the spectator ion and net ionic eq. is 2I-(aq)  + Cl2(aq)  → 2Cl-(aq)   +    I2(aq) K+ is the spectator ion and net ionic eq. is I-(aq)  + Cl2(aq)  → Cl-(aq)   +    I2(aq) In the following reaction   NaCl(aq)    +    AgNO3(aq)    → NaNO3(aq)   +    AgCl (s) Na+ & NO3- are the spectator ions and net ionic eq. is Cl-(aq)  + Ag(aq)  → 2AgCl(s) Na+ & Cl- are the spectator ions and net ionic eq. is Cl-(aq)  + Ag(aq)  → AgCl(s) Na+ & NO3- are the spectator ions and net ionic eq. is Cl-(aq)  + Ag(aq)  → AgCl(s) Na+ & Ag+ are the spectator ions and net ionic eq. is Cl-(aq)  + Ag(aq)  → AgCl(s) . How many gm moles oxygen are there in 88 gms carbon dioxide?   1 2 3 4