A student breathed gently in and out of the mouthpiece of the apparatus shown.
What were the results after 10 breaths?
▶️Answer/Explanation
Ans: B
Question
Sea water is heated in the apparatus shown.
Which row describes changes at positions X and Y?
▶️Answer/Explanation
Ans: C
Question
An experiment is assembled to measure the rate of reaction between limestone and hydrochloric acid. In the experiment a gas is released. The volume of gas produced is measured every five seconds. Which piece of apparatus cannot be used to measure the volume of gas? (A) burette (B) measuring cylinder (C) pipette (D) gas syringe