POST UTME Oou Chemistry Past Questions And Answers
1
The oxidation number of chlorine is +1 in
- A)KClO3
- B)Cl2O7
- C)ZnCl2
- D)NaClO
2
The following uses radioactive isotopes except for
- A) sterilization of medical equipment
- B) tracing reaction paths
- C) dating elements
- D) determining equilibrium positions
3
The carbon atoms on ethane are
- A)sp2 hybridized
- B)sp hybridized
- C)sp3 hybridized
- D)sp2d hybridized
4
The metal extracted from cassiterite is
- A) calcium
- B) copper
- C) tin
- D) sodium
5
0.499g of CuSO XH20 when heated to constant weight gave a residue of 0.346g. What is the value of X?
- A) 2.0
- B) 3.0
- C) 5.0
- D) 4.0
6
At 25°C and 1atm, a gas occupies a volume of
1.50dm3. What volume will it occupy at 100°C and 1atm?
- A)1.88dm3
- B)6.00dm3
- C)18.80dm3
- D)60.0dm3
7
The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as
- A) Brownian Motion
- B) Zig Zag Motion
- C) evaporation
- D) liquefaction
8
Pauli exclusion principle is related to
- A) quantum numbers of electrons
- B) reversibility of equilibrium reactions
- C) electronegativity values of elements
- D) collision theory of reactions rate
9
A gaseous mixture of 80.0g of oxygen and 56.0 of nitrogen has a total pressure of 1.8atm. The partial pressure of oxygen in the mixture is
- A) 0.8atm
- B) 1.0atm
- C) 1.2atm
- D) 1.4atm
10
Which of the following substances increases in mass when heated in air?
- A) sodium chloride
- B) iodine crystals
- C) magnesium ribbon
- D) copper (II) oxide