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5/94 MCQs for:
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Carbon
When a gas turns limewater cloudy, but the cloudiness disappears upon passing more of the gas, it indicates the gas is:
Which of the following carbonates is stable to heat and does not readily decompose upon heating?
What is the common name for potassium hydrogen carbonate (KHCO₃)?
When a solution of sodium carbonate is added to a solution of magnesium sulfate, what is observed?

__ is the existence of an element or a compound in two or more different forms but in the same physical state.