50 MCQ Questions
- Choose a metal commonly used as overhead electric cables.
A: Zinc
B: Aluminium
C: Iron
D: Copper
- Select a method that can be used to separate a mixture of water and petrol.
A: Evaporation to dryness
B: Separating funnel
C: Sublimation
D: Simple distillation
- Determine the atomic number of an atom with electronic configuration 2,8,8,2.
A: 10
B: 4
C: 2
D: 20
- The thermal decomposition of calcium nitrate will produce;
A: Ca(N02)2 and O2
B: C5H10
C: C5H11
D: C5H8
- The transition metal used as a catalyst in the manufacture of ammonia is
A: Vanadium
B: Copper
C: Iron
D: Platinum
- The element X exists naturally as two isotopes, 80X and 82X in the ratio 1 :1 . The relative atomic mass of X will be
A: 81
B: 80.5
C: 82
D: 80 Questions 7-9 concern the following table. M, N, O, P and Q are not the usual symbols of the elements. Each element can be selected once, more than once or Not at all.
Select from the table:
Element
M
N
O
P
Q
Proton
12
16
17
18
20
Electron
12
17
17
18
20
- An element that will not react easily with other elements.
A: M
B: N
C: O
D: P
- Elements that belong to the same group of the Period Table
A: M and N
B: M and Q
C: O and Q
D: N and O
- Determine the formula of the compound formed between M and N
A: M2N2
B: MN
C: MN2
D: M2N
- Give the formula of the fifth member of the homologous series with general formula CnH2n+2
A: C5H12
B: C5H10
C: C5H11
D: C5H8
- Name two air pollutants which are responsible for acid rain.
A: N2 and S02
B: NO2 and C02
C: C02 and SCT
D: S02 and N02
- Which of the following substances will burn with a smoky and luminous flame?
A: Propane
B: Ethene
C: Hydrogen
D: Butane
- Calculate the amount of substance in moles in250cnv3 of 0.IM HCI(aq).
A: 0.05
B: 0.25
C: 0.025
D: 0.5
- When excess carbon dioxide is passed through lime water, the milky colour disappears due to the formation of
A: Ca(HC03)2
B: CaCO3
C: CaO
D: Ca(OH)2
- What is the colour imparted to a Bunsen flame by a copper (II) salt?
A: Bluish green
B: Apple green
C: Golden yellow
D: Brick red
A: Zinc
B: Aluminium
C: Iron
D: Copper
A: Evaporation to dryness
B: Separating funnel
C: Sublimation
D: Simple distillation
A: 10
B: 4
C: 2
D: 20
A: Ca(N02)2 and O2
B: C5H10
C: C5H11
D: C5H8
A: Vanadium
B: Copper
C: Iron
D: Platinum
A: 81
B: 80.5
C: 82
D: 80 Questions 7-9 concern the following table. M, N, O, P and Q are not the usual symbols of the elements. Each element can be selected once, more than once or Not at all.
Select from the table:
| Element | M | N | O | P | Q |
| Proton | 12 | 16 | 17 | 18 | 20 |
| Electron | 12 | 17 | 17 | 18 | 20 |
A: M
B: N
C: O
D: P
A: M and N
B: M and Q
C: O and Q
D: N and O
A: M2N2
B: MN
C: MN2
D: M2N
A: C5H12
B: C5H10
C: C5H11
D: C5H8
A: N2 and S02
B: NO2 and C02
C: C02 and SCT
D: S02 and N02
A: Propane
B: Ethene
C: Hydrogen
D: Butane
A: 0.05
B: 0.25
C: 0.025
D: 0.5
A: Ca(HC03)2
B: CaCO3
C: CaO
D: Ca(OH)2
A: Bluish green
B: Apple green
C: Golden yellow
D: Brick red
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