cameroon gce A level June 2024 chemistry 1
cameroon gce A level June 2024 chemistry 1
Questions 1- 35 (Thirty-five questions)
Directions: Each of the questions or
incomplete statements in this section is
followed by four suggested answers. Select
the best answer in each case.
I . Molar mass is the mass of
one molecule of a substance
one moje of a substance
one atom of a substance
1 /12″‘ the mass of one molecule of a
substance
compouiK
formed. The molecular formula of compound X
is
A CHJCH2OH
B Cl fiOl I
C CHJCHJCHJOH
AB D (CH3)JCO
C
7. 100 cm’ of 0.10 M solution of a certain metal
chloride required 200 cm1 of 0.20 M solution
of silver nitrate for complete precipitation of
the chlorides. The right formula for the metal
chloride could be?
A MCI 4
B MCI
C MCI3
D MCI2
D
2. The mass number of an atom is the sum of the
number of
A protons and neutrons in the nucleus of
an atom
B electrons and protons in an atom
C electrons, protons and neutrons in an
atom
D protons in the nucleus of an atom. 8. H202 decomposes according to the
equation: 2H202 —> 2H20 + 02.What is the
rate of disappearance of H202 with respect to
the rate of formation of 02 gas?
A 2
B 1
C 1/2
D 2/3
3. Why are some ionic compounds like AgCI
insoluble in water which is a polar solvent?
Their lattice energy is higher than their
solvation energy
Their lattice energy is lower such that it
cannot compensate for the solvation
energy
Their cations have a high charge
density which needs high energy to be
broken
The hydration energy is higher than
their lattice energy.
A B
9. Identify the energy change(s) involved in the
reaction A Atomization Li(g) + F (gand )—ionization Li + (g) + Fof~ Lithium (g) .
B ionization of Lithium and electron
affinity of Fluorine
C Ionization of Lithium and ionization of
Fluorine
D Lattice energy of Lithium and Fluorine
C D
4. The mass of 1 mole of calcium is 40 g. What is
the mass of one calcium atom?
6.02 x 1023
6.02 x I 0‘23
6.65 x 10”
6.65 x 10‘23
A
10. The Bragg’s equation is given by 2dsine ‘= nX.
d in the equation represents:
A Distance between two atoms
BCD
B Distance between two layers
5. Nitration of benzene takes place in the C Distance between x-rays
presence of a nitrating mixture. Identify the
nitrating mixture amongst the following:
A dilute H2S04/ dilute HNOj
B Cone. H1SO4/C011C. HNO3
C NO/
D UNO,
1 i 1
D Wave length 4
11. Which of the following oxides is solid and
acidic ?
A Pb02
B CO>
C SnO?
D SiO
/
