The shape of the carbon (lV) oxide molecule is?
A. pyramidal B. linear C. angular D. tetrahedral Correct Answer: Option B = linear
What volume of carbon (ll) oxide is produced by reacting excess carbon with 10 dm³ of oxygen?
A. 5 dm³ B. 20 dm³ C. 15 dm³ D. 10 dm³ Correct Answer: Option B – 20 dm³
The presence of an impurity in substance will cause the melting point to?
A. be zero B. reduce C. increase D. be stable Correct Answer: Option B – reduce Explanation Impurities disrupt the repeating pattern of forces that holds the solid together. So a smaller amount of energy is required to melt the part of the solid surrounding the...
Z in diagram below represents?
A. heat of reaction B. activation energy C. free energy D. entropy of reaction Correct Answer: Option A = heat of reaction
The gas that is removed by the water in the flask is?
A. O2 B. SO2 C. HCI D. H2 Correct Answer: Option C – HCIProducts
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