Question 1 A student is provided with an unmarked beaker containing a colorless solution and
asked to identify it. The student decides to perform a series of reactions wth the
solution and record the observations,
Which of these observations is not indicative of an acd?
A
The elulion causes blue Imus to burn tód.
On heating and the addition of copper oxide the solution "ums blur.
C
On the addition of anonium carbonate a colour 29. pungent gas is released.
On the addition of a piece of magnesium, effervescence was produced and the
magneeum DIACA 'disappeared atter ataw minutes,
Question 2

What is the equilibrium constant of aa+bb=cc+dd

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa