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CAIE A-Level Chemistry AS 10.1.3 Thermal Decomposition Trends Questions

Practise writing Group 2 nitrate and carbonate decomposition equations and applying the thermal-stability trend.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • write MCO3 → MO + CO2 and identify the oxide and carbon dioxide products
  • write nitrate decomposition to MO, NO2 and O2 with balanced integer or accepted fractional coefficients
  • state that thermal stability increases down Group 2 and predict the relative heating required

CAIE A-Level Chemistry AS 10.1.3 Thermal Decomposition Trends Questions question 1

[Maximum number: 1]

What is the total volume of gas produced, measured at room conditions, when 0.010 mol of anhydrous magnesium nitrate is completely decomposed by heating?

A

240 cm3240 \mathrm{~cm}^{3}

B

480 cm3480 \mathrm{~cm}^{3}

C

600 cm3600 \mathrm{~cm}^{3}

D

720 cm3720 \mathrm{~cm}^{3}

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