Question
In which state does 1 \(dm^{3}\) of methane contain the most particles?
A. gas at \(100^{\circ}C\)
B. gas at room temperature
C. liquid
D. solid
Answer/Explanation
Ans;
D
Question
Which row about a change of state is correct?
Answer/Explanation
Ans: C
Question
Decane has a freezing point of –30 °C and a boiling point of 174 °C.
A small sample of decane is placed in an open beaker in an oven at a temperature of 120 °C and
at atmospheric pressure for 24 hours.
What happens to the sample of decane?
A It boils.
B It evaporates.
C It melts.
D It sublimes.
Answer/Explanation
Ans: B
Question
A mixture of ice and water is left to stand and the ice melts.
Which row describes what happens as the ice is melting?
▶️Answer/Explanation
Ans:D