CIE Chemistry Paper-1: Specimen Questions 42 - 44 of 99
Question number: 42
The diagrams show the arrangement of particles in three different physical states of substance X.
Which statement about the physical states of State A and State C is correct?
State A changes to State C by Melting.
State A changes to state C by Freezing
State A changes to State C by vaporization
State A changes to state C by Deposition
The above three figures clearly state that Figure 1 is a liquid substance, Fig 2 is a gas and Fig 3 is a solid.
Therefore it can be seen that a liquid state is changing to a solid state.
Freezing is the process by which a liquid state changes to solid state.
Question number: 43
On moving down in group in periodic table which one of the following does not increase?
No of shells
The elements in the same group going from top to down have the same kind of electronic configuration. Consider in group 1 from top to bottom,
H = 1
Li = 2, 1
Na = 2, 8, 1
And so on.
We can see that the valence electron number remains the same as we move down in a group.
Question number: 44
Which bond is not in a molecule of ethanoic acid?
C = C
C = O
The structural formula of ethanoic acid is:
From the above structure it is clear that there is no C = C bond.