Post Utme Chemistry Questions
Question 181:
Alloys are best prepared by ____________
- A Electroplating
- B Arc-welding
- C Reducing a mixture of this metallic oxides
- D Cooling a molten mixture of the metals
Question 182:
In the electrolysis of brine, the anode is ____________
- A Platinum
- B Copper
- C Zinc
- D Carbon
Question 183:
Oxyacetylene flame is used for ironwelding because it ____________
- A Makes the iron metal solidify very quickis
- B Combines with oxygen to give a prop sound
- C Evolves a lot of heat when burnt
- D Dissociation to produce carbon (IV) oxide and oxygen
Question 184:
What volume of carbon (II) oxide is produce by reacting excess carbon with 10dm of oxygen?
- A \(15dm^3\)
- B \(10dm^3\)
- C \(5dm^3\)
- D \(20dm^3\)
Question 185:
The rate of diffusion of gas Y is twice that of Z. if the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z.
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