#1
JAMB2025
(CH \(_3\) ) \(_2\) CHCH(OH)CH \(_2\) C(CH \(_3\) ) \(_3\) The IUPAC name of the compound above is
- A2,5,5-trimethylhexan-3-ol
- B1,1-dimethylisopentanol
- C1,1,4,4-pentamethylbutanol
- D2,5-dimethylhexan-4-ol
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#2
WAEC2022
The IUPAC name of the compound CH3CH(CH3)CHCH2 is
- A2 - methyl but - 1 - ene
- B2 - methyl but - 2 - ene
- C3 - methyl but - 1 - ene
- D3 - methyl but - 2 - ene
#3
WAEC2017
The ionization energy is affected by the following factors except
- Adistance of the outermost electron(s) from the nucleus
- Bsize of the positive nuclear charge
- Cability to attract shared electron(s)
- Dscreening effect of the inner electron(s)
#4
JAMB2011
An isotope has an atomic number of 15 and a mass number of 31. The number of protons it contain is
- A16
- B15
- C46
- D31
#5
WAEC2007
Which of the following methods can be used to separate a mixture of two miscible liquids with different boiling points?
- ADecantation
- BDistillation
- CEvaporation
- DFiltration
#6
WAEC2001
If 10 cm 3 of distilled water is added to 10 cm3 of an aqueous salt solution, the concentration of the solution
- Aincreases
- Bdecreases
- Cremains constant
- Ddoubles
#7
WAEC1995
What is the percentage by mass of copper in copper in copper (l) oxide (C\(U_{2}O)\)? [O = 16; CU =64]
- A88.9%
- B80.0%
- C66.7%
- D20.0%
- E11.1%
#8
JAMB1988
Carbon (ll) oxide may be collected as shown above because
- Ais heavier than air
- Bis less dense than air
- Cis insoluble in water
- Dburns in oxygen to form carbon (IV) oxide