Acetone and isopropyl alcohol are generally not suitable
foruse in extraction, but are frequently used as
. explain.

Explanation:

Acetone and isopropyl alcohol are generally not used in extraction as both are miscible in water. The main idea of extraction is to isolate or separate the compounds in the mixture based on their solubility, extent of formation of hydrogen bonding, polarity or any other factor which works efficiently when the solvents are miscible and the compounds get distributed effectively. But acetone and isopropyl alcohol are used as re crystallization solvents as they dissolve the compounds not the impurities and at the same time they can effect the polarity of the solution when mixed with polar or non polar solvents.

the answer is b & c i believe : )

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.