![What number of moles of oxygen would exert a pressure of 10 atm at 320 K in an 8.2 dm2 cylinder? [R = 0.082 atm dm³ mol‾¹ K‾¹]](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers.jpg)
A molecular of phosphorus is?
A. diatomic B. triatomic C. tetraatomic D. monoatomic Correct Answer: Option C – tetraatomic
The most common method of preparing insoluble salts is by?
A. filtration B. decomposition C. neutralization D. double decomposition Correct Answer: Option D – double decomposition
Which of the following gasses is highly soluble in water at room temperature?
A. ammonia B. carbon (IV) oxide C. chlorine D. nitrogen Correct Answer: Option A – ammonia
The formation of ethene from dehydration of ethanol can be described as
A. an addition reaction B. an elimination reaction C. an oxidation reaction D. a substitution reaction Correct Answer: Option B – an elimination reaction
Which of the following illustrates the variation of the rate of evolution of gas from a given length of magnesium ribbon (y-axis) with an increase in the concentration of the added (x-axis)?
Study the graphs below and use them to answer the question below A. I B. II C. III D. IV Correct Answer: Option A = IProducts
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