2019年5月IB化学SL真题下载-Paper1
1.Which diagram represents a heterogeneous mixture?
2. What is the sum of the coefficients when the equation is balanced with the smallest whole numbers?
__BaCl2 (aq) + __Fe2(SO4)3 (aq) → __FeCl3 (aq) + __BaSO4 (s)
A.4
B.6
C.8
D.9
3.What is the empirical formula of a hydrocarbon with 75 % carbon and 25 % hydrogen by mass?
A.C3H
B.CH2
C.C2H6
D.CH4
4.Which graph would not show a linear relationship for a fixed mass of an ideal gas with all other variables constant?
A.P against V
B.P against 1V
C.P against T
D.V against T
5.Bromine consists of two stable isotopes that exist in approximately a 1 : 1 ratio. The relative atomic mass, Ar, of bromine is 79.90. Which are the stable isotopes of bromine?
A.79Br and 81Br
B.80Br and 81Br
C.78Br and 80Br
D.79Br and 80Br
6.What is the ground state electron configuration of an atom of chromium, Cr (Z = 24)?
A.[Ar]3d6
B.[Ar]4s23d4
C.[Ar]4s13d5
D.[Ar]4s24p4
7.Which describes an atom of bismuth, Bi (Z = 83)?
8.What are typical characteristics of metals?
9.What is the order of increasing boiling point?
A.CH3CH2CH2CH3 < CH3CH(OH)CH3 < CH3COCH3 < CH3CO2H
B.CH3CH2CH2CH3 < CH3COCH3 < CH3CH(OH)CH3 < CH3CO2H
C.CH3CO2H < CH3COCH3 < CH3CH(OH)CH3 < CH3CH2CH2CH3
D.CH3CH2CH2CH3 < CH3COCH3 < CH3CO2H < CH3CH(OH)CH3
10.Which species does not have resonance structures?
A.C6H6
B.NH4+
C.CO32−
D.O3
2019年5月IB化学SL真题余下省略！
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