Questions Correction 2022 Flashcards
1
Q
Three differences in physical properties of elements in group 1 vs transition elements
A
Group 1 have lower melting points
Have lower densities
Are softer
2
Q
Two reasons why the C70 molecule is suitable to move drugs around the body
A
unreactive
not toxic
3
Q
Describe how the student should obtain crystals of zinc chloride from a solution of zinc chloride
A
Heat until crystallisation point is reached
Leave the solution to crystallise
4
Q
Explain why the electrical conductivity of the mixture was zero when the sulphuric acid had just been neutralised
Refer to ions
A
No ions free to move
As barium sulfate is insoluble
And hydrogen ions have reacted with hydroxide ions to produce water
5
Q
A
