cameroon gce advanced level June 2022 chemistry 1

cameroon gce advanced level June 2022 chemistry 1

cameroon gce advanced level June 2022 chemistry 1

Questions 1 – 36 (Thirty-six 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 . Select an oxide which is acidic and a solid.
A SiO,
B CO,
C PbO
1) SnO
9. Sulphuric acid is manufactured on a large scale by
the contact process. State the conditions needed for
optimum yield of the acid.
Temperature of 200 °C, Pressure 250 atm ,
A
V2Oscatalyst
Temperature of 600 °C, Pressure of I atm,
V2Ojcatalyst
_ Temperature of 500 °C, Pressure of 250 atm,
V2O5 catalyst
Temperature of 500 °C, Pressure of I atm,
V205 catalyst
an
2. Identify the element with a body centered cubic
packed arrangement.
A Copper
B Sodium
C Magnesium
D Silver
3. What is the shape of the nitrate ion, NO3?
A Tetrahedral
B Trigonal planar
C Trigonal pyramidal
D Trigonal bipyramidal
10. Which of these compounds will give a yellow
precipitate witli a characteristic smell when
reacted with NaOH/L?
A C6H 5OH
B CH,CH >CHO
C CHJCH(OH)C1 I3
D CH3CH2COCH2CH3
4. How many isomers could be obtained from the
compound with molecular formula C3H602?
A 5
B 4 11. Identify the product formed from the reaction:
(CH3)2CO + 4[H] Zn/Hg, Cone HCI
*
A C2H 5COOH
B CH3CHOHCH3
C CH3CH2CII2OH
D CH3CH2CH3
CD
2
5. Which of the following techniques would be
most appropriate in identifying the position of
hydrogen atoms in an organic compound?
A Infra-red spectroscopy
B Mass spectroscopy
C X-ray diffraction
D Nuclear magnetic resonance
12. At 50 °C, the ionic product of water, Kw is
5.7 x 1 O’14 mol2/dm6, what is the pi I of water at
this temperature?
A 2.3
6. Calculate the number of moles of hydroxide ions
present in 2.90 g of a solution of magnesium
hydroxide, Mg(OH )2.
(RAM : Mg = 24; O = 16; H = I ).
A 0.05 moles
B 0.071 moles
C 0.1 moles
D 0.14 moles
B 6.6
C 7.0
D 7.3
13. I lie table below shows two half-cell equations
and their corresponding values of standard redox
potentials.
A: Pb2t(aq) + 26 -» Pb(s)
B: I2(s) + 2c -» 2l'(aq)
Write the cell diagram that results when A and B
are connected.
A Pb(s) / Pb2 f(aq) // I2(aq ),2 l'(aq )/Pt
B Pb(s) /Pb2>q) // 2f (aq),l2(aq)/Pt
C Pt/2f (aq ),l 2(aq ) // Pb2′(aq)/ Pb(s)
I) Pt/I 2(aq ),21′(aq) // Pb(s)/Ph2,(aq )
E° = -0.13V
E° = +1.36V
7. Which experiment led to the d iscover)’ of the
nucleus?
A Gold foil experiment
B Beryllium foil experiment
C Cathode ray experiment
D Light scattering experiment