A level north west regional mock gce 2022 chemistry 1
A level north west regional mock gce 2022 chemistry 1
1. The relative atomic mass of an element is defined >
as: > r
A The mass of an atom of an element relative to 1/12
the mass of a C-12 isotope.
B The mass of an atom of an element relative to the
mass of a hydrogen atom.
C The average mass of an clement relative to 1/12 the
mass of one atom of C-12 isotope.
D The average mass of an atom of an element
relative to 1/12 the mass of a carbon-12 isotope.
2. Which of the following equations represent the
second ionization energy of magnesium?
^ Mg2;(nq)
> Mg (aq) + e
>Ug 2
> Mg+(ttq) + e
) A •
each
C trigonal pyramidal
^ trig0nal planar. the
dimerization of ethanoicaci
A dative covalent bonding
B Van.der waals forces
C’. ,dipole-dipole attraction
D Hydrogen bonding; ——
11. Which row correctly shows the type o
mechanism of each ofthenyoreactions?
rrip^KCN^’ TCH3COCH3 + HCN
A. Mg + 2e
^
B . Mg+
C. Mg(qi)+ 2e
D
– Mg. ,
(aq)
(aq)
233
3. The half-life of 91^ is 28 days. How long would
it take for the radioactivity of protactinium, Pa, to
reduce to 1/16 of its initial value?
A 112days
B 84days eiectrophilic addition
C 56days
D 28days.
electrophilic substitution
electrophilic substitution
nucleophilic substitution
‘ •’ __
nucleophilic substitution
A
B nucleophilic addition
4. An organic compound of relative molecular mass
150 contains the following composition by mass: 32%
carbon, 4% hydrogen, and 64% oxygen. Its empirical
formula is
C electrophilic addition
D nucleophilic addition
A CH202
B C2H303
C CHO
D C4H606 (RAM: C=12; H=l; 0=16)
12. How many isomeric esters have the molecular
formula C4H8O2?
A 2 ‘
B 3
C 4
D 5
5. Copper has atomic number 29. The electronic
configuration of Cu(i) ion is.
A [Ar]3d94s2
B [Ar]3d‘°4s1
C [Ar]3d94sl
D [Ar]3d104s°
6. Which property increases with increasing atomic
number for both alkali metals and the halogens?
A Ionisation energies
B Melting points
C Electronegativities
D Atomic radii.
