Answer:
You should not use an open flame to heat the solvent and the solvent should be heat in a stoppered flask to vapour away from the open flame
Explanation:
Answer:
Y, Q, W, Z and X
Y > Q > W > Z > X
Explanation:
To know the most reactive element, the element will be able to displace other metal in it compound. We also have to observe if the reaction occur. If the reaction didn't occur, that means the element is not reactive than the metal found in the other reactant. Invariably their will be no displacement.
Q + w+ Reaction occurs
Q element displace the metal w in it compound . This means Q is more reactive.
x +z+ No reaction
No reaction here. This means x is less reactive than z as it couldn't displace z in it compound.
w + z+ Reaction occurs
w is more reactive than z as it displaces z in it compound.
Q+ + Y Reaction occurs
Y is more reactive than Q as it displaces Q in it compounds.
Therefore, the most reactive to the least reactive is arrange as follows.
Y, Q, W, Z and X
<span>The Answer is option B.
The solubility of a sample will decrease when the size of the sample increases.
</span><span>When the Size of
sample is bigger, it means there is more particles that make up that sample so
the amount of solvent to dissolve the sample will also be in the greater
amount. Thus, when the sample size increases the solubility decrease. We can
also say that size of sample and solubility are inversely proportional to each
other.</span>
If you meant to say 100C, then yes this is True.