Jamb 2007 Chemistry Past Questions And Answers
1
the elements that belong to the third period of the periodic table are
- A. Li, Be, Al and P
- B. Na, P, O and Cl
- C. B, C, N and O
- D. Nz, Mg, S and Ar
2
A metal X forms two bromides with the formulae XBr2 and XBr3. What type of bonding exists between X and bromine in the bromide?
- A. Ionic bonding
- B. Metallic bonding
- C. Dative bonding
- D. Covalent bonding
3
The conversion of open chain alkanes into cycloalkanes and aromatic compounds is called
- A. cracking
- B. reforming
- C. isomerization
- D. polymerization
4
The reddish-brown rust on iron roofing sheets consists of
- A. Fe3+(H2O)6
- B. FeO.H2O
- C. Fe2O2.3H2O
- D. Fe2O2.2H2O
5
A mixture of petrol and water can be separated through
- A. centrifugation
- B. distillation
- C. the use of separating funnel
- D. the use of filter paper
6
An element used in the production of matches is
- A. nitrogen
- B. aluminium
- C. copper
- D. sulphur
7
The hydrocarbon used in the production of styrene is
- A. ethyne
- B. propyne
- C. ethane
- D. ethene
8
Which experiment led to the measurement of the charge on an electron?
- A. Mass spectrometric experiment
- B. Oil-drop experiment
- C. Scattering α - particles
- D. Discharge-tube experiment
9
The reaction that takes place in Daniell cell is
- A. direct combination
- B. redox
- C. double decomposition
- D. neutralization
10
CH3CH2Cl + KCN → CH3CH2CN + KCl CH3CH2Cl + KCN → CH3CH2CN + KCl In the reaction above, the cyanide is
- A. hydrophobic
- B. hydrophilic
- C. nucleophilic
- D. electrophilic