2019年11月IB化学SL真题下载-Paper1
1.0.10 mol of hydrochloric acid is mixed with 0.10 mol of calcium carbonate.
2HCl (aq) + CaCO3 (s) → CaCl2 (aq) + H2O (l) + CO2 (g)
Which is correct?
2.What is the sum of the coefficients when the equation is balanced with whole numbers?
__MnO2 (s) + __HCl (aq) → __MnCl2 (aq) + __H2O (l) + __Cl2 (g)
A.6
B.7
C.8
D.9
3.Which is correct?
A.Mixtures are either homogeneous or heterogeneous and their chemical properties are an average of the individual component properties.
B.Mixtures are never heterogeneous and their chemical properties are an average of the individual component properties.
C.Mixtures are either homogeneous or heterogeneous and the components retain their individual chemical properties.
D.Mixtures are never homogeneous and the components retain their individual chemical properties.
4.Which contains the greatest number of moles of oxygen atoms?
A.0.05 mol Mg(NO3)2
B.0.05 mol C6H4(NO2)2
C.0.1 mol H2O
D.0.1 mol NO2
5.What is represented by A in AZ X2−?
A.Number of electrons
B.Number of neutrons
C.Number of nucleons
D.Number of protons
6.Which represents the shape of an s atomic orbital?
7.Which property shows a general increase from left to right across period 2, Li to F?
A.Melting point
B.Electronegativity
C.Ionic radius
D.Electrical conductivity
8.Which is an f-block element?
A.Sc
B.Sm
C.Sn
D.Sr
9.Which is correct for all solid ionic compounds?
A.High volatility
B.Poor electrical conductivity
C.Low melting point
D.Good solubility in water
10.Which compound has the shortest C to O bond?
A.CH3CHO
B.CO
C.CO2
D.C2H5OC2H5
2019年11月IB化学SL真题余下省略！
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