IB myp 4-5 Chemistry – Practice Questions- All Topics
Topic :Periodic Table-Noble Gases
Topic :Periodic Table- Weightage : 21 %
All Questions for Topic : Metals and Non metals,Transition metals,Noble gases,Periodic trend groups and periods
Question:
Why is it an advantage for chemists to have access to elements that are inert?
▶️Answer/Explanation
Ans: Elements that are inert are useful as they do not react with other elements and compounds.
Question:
Describe some applications in which this property can be exploited.
▶️Answer/Explanation
Ans: One useful application of inert gases is the storage of reactive elements in sealed glass tubes surrounded by an inert gas.
Question:
Calculate the molar mass of the following compounds using the values of Ar found in the periodic table.
a) CO2
b) SO3
c) HNO3
d) Na2CO3
e) KMnO4
f) CaCl2
g) Al(NO3)3
h) Fe2(SO4)3
i) (NH4)2SO4
j) Na2S2O3.7H2O
▶️Answer/Explanation
Ans: a) 44.01 g mol–1 f) 110.98 g mol–1
b) 80.07 g mol–1 g) 213.01 g mol–1
c) 63.02 g mol–1 h) 399.91 g mol–1
d) 105.99 g mol–1 i) 132.17 g mol–1
e) 158.04 g mol–1 j) 284.26 g mol–1